Parts Lists and Schematics

PARTS LIST 1↑ TOP

Ref. No.	Description	Parts No.	Notes
1-1	Screw	EZ-09-M3x25
1-2	Display Washer	TY-800-021
1-3	Sheet	TY-800-017
1-4	Wood Screw	EZ-09-M3.5x20
1-5	Protector	CS-264-005
1-6	Case Top Board	CS-274-008
1-7	Case Side Board	CS-274-002
1-8	Latch	CA-39-C-15
1-9	Wood Screw	EZ-09-M3.1x16
1-10	Cap Screw	EZ-09-M4x25
1-11	Display Washer	TY-800-014
1-12	Under Cover	CS-274-005
1-13	Screw	EZ-09-M3x8
1-14	Case Bottom Board	CS-274-010

⤢ zoomEXPLODED VIEW 1: the wooden case pulled apart around the machine frame: the top and bottom boards with their mesh panels, the two side boards with their latches and cap screws, the under cover, and the corner protectors with their wood screws, display washers and sheets · Redrawn as vector — zooms cleanly · view the original scan

PARTS LIST 2↑ TOP

Ref. No.	Description	Parts No.	Notes
2-1	Screw	EZ-09-M3x20
2-2	Display Washer	TY-800-021
2-3	Sheet	TY-800-017
2-4	Display Panel	TD-5250D-005
2-5	Screw	EZ-09-M3x14
2-6	Display Panel	TD-5250D-003
2-7	Screw	EZ-09-M4x12
2-8	Screw	EZ-09-M4x14
2-9	Mounting Base	TD-5250D-001
2-10	W-W Resistor	RS-99-KNH40V1S-600ohm
2-11	W-W Resistor	RS-99-KNH30V2S-200ohm
2-12	Power Transfomer[sic]	ET-11-199(8SD,½QXD) ET-11-209(QXD,2SD₂)
2-13	Frame	TD-5251D-001
2-14	Screw	EZ-09-M4x10
2-15	Frame Stud	TD-5010-008
2-16	Plain Washer	EZ-09-M4
2-17	Spring Washer	EZ-09-M4
2-18	Nut	EZ-09-M4
2-19	Panel Supporter	TD-5250-006
2-20	Screw	EZ-09-M3x8
2-21	Plain Washer	EZ-09-M3
2-22	Screw	EZ-09-3x105[sic]
2-23	Screw	EZ-09-M3x90
2-24	Nut	EZ-09-M3
2-25	Spring Washer	EZ-09-M3
2-26	Cover	TD-5250D-008
2-27	Connector Panel	TD-5250D-007
2-28	Cap Screw	EZ-09-M4x6
2-29	Screw	EZ-09-M3x8

⤢ zoomEXPLODED VIEW 2: the deck structure from the top display panels down through the mounting base, the power transformer and wire-wound resistors, the two side frames with their stud, and the connector panel and cover underneath · Redrawn as vector — zooms cleanly · view the original scan

PARTS LIST 3↑ TOP

Ref. No.	Description	Parts No.	Notes
3-1	Reel Clamper	[unclear]
3-2	Screw	EZ-09-M4x8
3-3	Reel Table	TW-424-001
3-4	Reel Shaft Holder	TW-424-002
3-5	Cap Screw	EZ-09-M4x10
3-6	Reel Protector	TW-424-009
3-7	Display Panel	TD-5250D-003
3-8	Screw	EZ-09-M4x14
3-9	Mounting Base	TD-5250D-001
3-10	Switch Supporter	PA-282-003
3-11	Screw	EZ-09-M3x6
3-12	Rotary Switch	SW-99-HZR0036-01-010
3-13	Screw	EZ-09-M2x6
3-14	Belt	TB-5070-16
3-15	Screw	EZ-09-M4x10
3-16	Reel Motor Supporter	TW-421-018
3-17	Spring Washer	EZ-09-M4
3-18	Nut	EZ-09-M4
3-19	Reel Motor	EM-506-019
3-20	Capacitor Holder L	TW-421-017L
3-21	Capacitor Holder R	TW-421-017R
3-22	Brake Base L	TW-421-009
3-23	Brake Base R	TW-421-007
3-24	Cap Screw	EZ-09-M3x8
3-25	Brake Guide	TW-421-004
3-26	Spring	For 8SD or ½QXD:SG-100-068 For QXD or 2SD₂:SG-100-052
3-27	Brake Arm	TW-424-008
3-28	Retaining Ring	EZ-09-ETWJ-2
3-29	Brake Band Assembly	TW-424-00C
3-30	Rolled Pin	EZ-09-3dx16
3-31	Brake Dram[sic]	TW-424-007
3-32	Retaining Ring	EZ-09-ETWJ-2
3-33	Solenoid Pin	TY-400-015
3-34	Cord Clamper	EZ-09
3-35	Solenoid	SO-334 DC24V
3-36	MP Capacitor	CD-99-MPL-5.5microF
3-37	Plain Washer	EZ-09-M3

⤢ zoomEXPLODED VIEW 3: the reel drive for both reels: reel clampers, tables and shaft holders over the display panel and mounting base, the reel motors on their supporters with the MP capacitors, and below them the brake bases, band brakes, drums and solenoids, with the rotary switch and its belt on the left · Redrawn as vector — zooms cleanly · view the original scan

PARTS LIST 4↑ TOP

Ref. No.	Description	Parts No.	Notes
4-1	Knob	NB-31-037
4-2	Set Screw	EZ-09-M3x3
4-3	Dust Cap	TC-423-007
4-4	Display panel	TD-5250D-003
4-5	Screw	EZ-09-M4x10
4-6	Screw	EZ-09-M3x8
4-7	Mounting Base	TD-5250D-001
4-8	Stud	ST-086
4-9	Variable Resistor	VR-29-EVH-Y03R25B52
4-10	Variable Resistor Supporter	TC-427-003
4-11	Screw	EZ-09-M4x10
4-12	Motor Supporter	TC-212-001
4-13	Capstan Drive Motor	EM-710-007A
4-14	Nut	EZ-09-M3
4-15	Spring Washer	EZ-09-M3
4-16	Radiator	TC-212-002
4-17	Screw	EZ-09-M3x8
4-18	Screw	EZ-09-M3x6
4-19	Power Supply PCB Assembly	PA-377
4-20	PCB Supporter	TC-427-004
4-21	Fuse Holder	FS-89-F-3294
4-22	Fuse	FS-19-2A
4-23	Screw	EZ-09-M3x10

⤢ zoomEXPLODED VIEW 4: the capstan drive: the knob and dust cap on the display panel, the mounting base, the variable resistor on its supporter, the capstan drive motor on its supporter with the radiator, and the power supply board with its fuse holder and fuse · Redrawn as vector — zooms cleanly · view the original scan

PARTS LIST 5 For Model 8SD or ½QXD and Difference of Model 2SD₂ or QXD↑ TOP

Ref. No.	Description	Parts No.	Notes
5-1	Screw	EZ-09-M3x8
5-2	Pinch Roller Cap	TP-419-002A
5-3	Retaining Ring	EZ-09-RTW-19
5-4	Bearing	BG-19-626ZZ
5-5	Coller[sic]	TP-408-02
5-6	Pinch Roller	TP-210-001
5-7	Pinch Roller Shaft	TP-210-002
5-8	Display Panel	TD-5250D-003
5-9	Screw	EZ-09-M3x10
5-10	Screw	EZ-09-M4x12
5-11	Mounting Base	TD-5250D-001
5-12	Spring Supportor[sic]	TY-900-019
5-13	Screw	EZ-09-M3x6
5-14	Spring	SG-100-048
5-15	Pinch Roller Arm	TP-420-002
5-16	Cap Screw	EZ-09-M4x10
5-17	Arm Shaft	TP-420-001
5-18	Retaining Ring	EZ-09-ETWJ-4
5-19	Double Nut	EZ-09-M4
5-20	Spring	SG-500-031
5-21	Spherical Washer	TP-401-007
5-22	Fiber Washer	EZ-09-M4
5-23	Retaining Ring	EZ-09-ETWJ-3
5-24	Adjusting Screw	TP-416-009
5-25	Retaining Ring	EZ-09-ETWJ-2
5-26	Solenoid Pin	TY-400-015
5-27	Solenoid	SO-317 DC24V
5-28	Stopper	TY-200-013
5-29	Plain Washer	EZ-09-M3
5-30	Screw	EZ-09-M3x6

For Model QXD or 2SD₂ (Difference)↑ TOP

Ref. No.	Description	Parts No.	Notes
5-31	Pinch Roller Cap	TP-416-001
5-32	Set Screw	EZ-09-M3x8
5-33	Thrust Washer	EZ-09-Ø6x0.25t
5-34	Pinch Roller	TP-416-010
5-35	Retaining Ring	EZ-09-ETWJ-4
5-36	Pinch Roller Shaft	TP-416-002

⤢ zoomEXPLODED VIEW 5 For Model 8SD or ½QXD and Difference of Model 2SD₂ or QXD: the pinch roller assembly stacked on its shaft above the display panel and mounting base, the pinch roller arm with its spring, adjusting screw and solenoid linkage below, and, at upper left, the differing pinch roller stack for the QXD and 2SD₂ · Redrawn as vector — zooms cleanly · view the original scan

PARTS LIST 6-1 For Model 8SD↑ TOP

Ref. No.	Discription[sic]	Parts No.	Notes
6-1	Head Housing Assembly	TH-446-00B
6-2	Screw	EZ-09-M3x8
6-3	Screw	EZ-09-M2.6x6
6-4	Connector	CN-09-MR-34M
6-5	Connector	CN-09-MR-16M
6-6	Screw	EZ-09-M3x8
6-7	Connector Supporter	TH-212-006
6-8	Screw	EZ-09-M4x6
6-9	Screw	EZ-09-M3x6
6-10	Connector	CN-09-MR-16F
6-11	Connector	CN-09-MR-34F
6-12	Erase Head Assembly	TH-212-00D
6-13	Record Head Assembly	TH-212-00E
6-14	Playback Head Assembly	TH-212-00F
6-15	Tape Guide	TH-212-005
6-16	Screw	EZ-09-M3x15
6-17	Head Base	TH-212-002
6-18	Screw	EZ-09-M3x8
6-19	Display Panel	TD-5250D-003
6-20	Mounting Base	TD-5250D-001
6-21	Cord Clamper	EZ-01-001
6-22	Screw	EZ-09-M3x6
6-23	Cord Clamper	TY-200-006
6-24	Spring Washer	EZ-09-M3
6-25	Nut	EZ-09-M3
6-26	Erase Head	SH-5308-21-001
6-27	Head Supporter B	TH-212-004
6-28	Screw	EZ-09-M2x5
6-29	Shield Can	TH-212-001
6-30-1	Record Head	SH-6308-21-001
6-30-2	Reproduce Head	SH-7308-21-001
6-31	Head Supporter A	TH-212-003

⤢ zoomEXPLODED VIEW 6-1 For Model 8SD: the head assembly: the head housing cover and its screws, the connectors on the connector supporter, the erase, record and playback head assemblies with their tape guides on the head base, the display panel and mounting base below with the cord clampers underneath, and, at the sides, the erase head on head supporter B and the record or reproduce head in its shield can on head supporter A · Redrawn as vector — zooms cleanly · view the original scan

PARTS LIST 6-2 For Model ½QXD↑ TOP

Ref. No.	Description	Parts No.	Notes
6-1	Head Housing Assy	TH-446-00B
6-2	Screw	EZ-09-M3x8
6-3	Screw	EZ-09-M3x10
6-4	Connector	CN-09-1150-028-009
6-5	Screw	EZ-09-M3x6
6-6	Connector Supporter	TH-213-008
6-7	Screw	EZ-09-M4x6
6-8	Screw	EZ-09-M3x8
6-9	Screw	EZ-09-M3x6
6-10	Erase Head Assy	TH-213-005
6-11	Record Head Assy	TH-213-006
6-12	Reproduce Head Assy	TH-213-007
6-13	Tape Guide	TH-212-005
6-14	Head Base	TH-213-001
6-15	Screw	EZ-09-M3x8
6-16	Display Panel	TD-5250D-003
6-17	Mounting Base	TD-5250D-001
6-18	Head P.C.B. Assy	PA-386
6-19	Erase Head	SH-1304-21-001
6-20	Head Supporter B	TH-213-003
6-21	Screw	EZ-09-M2x5
6-22	Shield Can	TH-213-004
6-23	Record Head	SH-2304-21-001
6-24	Reproduce Head	SH-3304-21-001
6-25	Head supporter A	TH-213-002

⤢ zoomEXPLODED VIEW 6-2 For Model ½QXD: the head assembly: the head housing cover, the connector on its supporter, the erase, record and reproduce head assemblies with their tape guides on the head base above the display panel and mounting base, and, at the sides, the head P.C.B. on the connector supporter, the erase head on head supporter B, and the record and reproduce heads in their shield can on head supporter A · Redrawn as vector — zooms cleanly · view the original scan

PARTS LIST 6-3 For Model QXD↑ TOP

Ref. No.	Description	Parts No.	Notes
6-1	Screw	EZ-09-M3x6
6-2	Screw	EZ-09-M3x8
6-3	Plain Washer	EZ-09-M3
6-4	Head P.C.B. Assy	PA-386
6-5	Screw	EZ-09-M3x4
6-6	Plain Washer	EZ-09-M3
6-7	Protector Sheet	TH-438-009
6-8	Head Base	TH-446-001
6-9	Head Housing Assy	TH-446-00B
6-10	Tape Guide	TH-438-004
6-11	Screw	EZ-09-M3x6
6-12	Screw	EZ-09-M3x10
6-13	Connector	CN-09-1150-028-009
6-14	Housing Base	TH-455-001
6-15	Display Panel	TD-5250D-003
6-16	Mounting Base	TD-5250D-001
6-17	Screw	EZ-09-M3x15
6-18	Cord Clamper	EZ-01-001
6-19	Screw	EZ-09-M3x10
6-20	Screw	EZ-09-M3x12
6-21	Head Adjusting Spring	SG-500-040
6-22	Head Adjusting Spring	SG-500-063
6-23	Screw	EZ-09-M2x5
6-24	Spring Washer	EZ-09-M2
6-25	Screw	EZ-09-M2x4
6-26	Plain Washer	EZ-09-M2
6-27	Head Supporter C	TH-450-001
6-28	Head Supporter B	TH-442-002
6-29	Head Supporter D	TH-450-003
6-30	Spacer	TH-450-005
6-31	Shield Can	TH-450-004
6-32	Reproduce Head	SH-7204-11-004
6-33	Record Head	SH-6204-11-004
6-34	Erase Head	SH-5204-11-001

⤢ zoomEXPLODED VIEW 6-3 For Model QXD: the head assembly: the protector sheet and head P.C.B. over the head base, the tape guides, the connector, the head housing cover, and the housing base above the display panel and mounting base; at upper left the head stack of adjusting springs, head supporters, spacers and shield cans over the reproduce, record and erase heads, with enlarged details of two head mountings below it · Redrawn as vector — zooms cleanly · view the original scan

PARTS LIST 6-4 For Model 2SD₂↑ TOP

Ref. No.	Description	Parts No.	Notes
6-1	Screw	EZ-09-M3x6
6-2	Blind	TY-900-029
6-3	Plain Washer	EZ-09-M3
6-4	Head P.C.B. Assy	PA-387
6-5	Screw	EZ-09-M3x4
6-6	Screw	EZ-09-M3x8
6-7	Protector Sheet	TH-438-009
6-8	Head Base	TH-446-001
6-9	Head Housing Assy	TH-446-00B
6-10	Tape Guide	TH-438-004
6-11	Screw	EZ-09-M3x6
6-12	Screw	EZ-09-M3x10
6-13	Connector	CN-09-1150-028-009
6-14	Housing Base	TH-455-001
6-15	Display Panel	TD-5250D-003
6-16	Mounting Base	TD-5250D-001
6-17	Cord Clamper	EZ-01-001
6-18	Screw	EZ-09-M3x15
6-19	Screw	EZ-09-M3x10
6-20	Screw	EZ-09-M3x12
6-21	Head Adjusting Spring	SG-500-040
6-22	Head Adjusting Spring	SG-500-063
6-23	Screw	EZ-09-M2x5
6-24	Screw	EZ-09-M2x4
6-25	Spring Washer	EZ-09-M2
6-26	Plain Washer	EZ-09-M2
6-27	Head Supporter D	TH-450-003
6-28	Head Supporter B	TH-422-002
6-29	Head Supporter A	TH-422-001
6-30	Spacer	TH-450-005
6-31	Shield Can	TH-450-004
6-32	Reproduce Head	SH-7202-11-001
6-33	Record Head	SH-6202-11-001
6-34	Reproduce Head	SH-7204-11-001
6-35	Erase Head	SH-5202-11-001

⤢ zoomEXPLODED VIEW 6-4 For Model 2SD₂: the head assembly: the blind, protector sheet and head P.C.B. over the head base, the tape guides, the connector, the head housing cover, and the housing base above the display panel and mounting base; at upper left the head stack of adjusting springs, washers, head supporters, spacers and shield cans over the four heads, with an enlarged detail of one head mounting below it · Redrawn as vector — zooms cleanly · view the original scan

PARTS LIST 7↑ TOP

Ref. No.	Discription	Parts No.	Notes
7-1	Cue Lever	TR-416-001
7-2	Display Panel	TD-5250D-003
7-3	Screw	EZ-09-M4x12
7-4	Screw	EZ-09-M3x10
7-5	Mounting Base	TD-5250D-001
7-6	Arm Shaft	TP-420-001
7-7	Arm Shaft	TR-413-002
7-8	Shifter Arm A	TR-413-003
7-9	Shifter Arm B	TR-413-007
7-10	Retaining Ring	EZ-09-ETWJ-3
7-11	Spring	SG-100-050
7-12	Arm Shaft	TR-414-003
7-13	Pinch Roller Arm	TP-420-002
7-14	Retaining Ring	EZ-09-ETW-4
7-15	Fook[sic]	TR-419-003
7-16	Screw	EZ-09-M3x6
7-17	Blind	TY-900-053
7-18	Cue Arm Stopper	TY-200-071
7-19	Cue Lock Arm	TR-419-004
7-20	Plain Washer	EZ-09-M3
7-21	Cap Screw	EZ-09-M3x8
7-22	Cue Arm	TR-419-001

⤢ zoomEXPLODED VIEW 7: the cue mechanism: the cue lever passing down through the display panel and mounting base, the arm shafts and shifter arms with their spring and retaining rings under the base, the cue arm stopper, cue lock arm and blind at left, and the cue arm and pinch roller arm at the bottom · Redrawn as vector — zooms cleanly · view the original scan

PARTS LIST 8 For Model 8SD or ½QXD and Difference of Model 2SD₂ or QXD↑ TOP

Ref. No.	Description	Parts No.	Notes
8-1	Guide Roller	TG-213-001
8-2	Bearing	BG-19-606ZZ
8-3	Roller Holder	TG-425-002
8-4	Screw	EZ-09-M3x35
8-5	Guide Pole	TD-5450-007
8-6	Display Panel	TD-5250D-003
8-7	Mounting Base	TD-5250D-001
8-8	Holder Nut	TG-425-004
8-9	Set Screw	EZ-09-M3x4
8-10	Roller Pulley	TG-425-003
8-11	Belt	TB-5045-12
8-12	Counter	CT-19-MP-499-01SPEC
8-13	Counter Supporter	TZ-126-001
8-14	Screw	EZ-09-M3x6

For Model 2SD₂ or QXD (Difference)↑ TOP

Ref. No.	Description	Parts No.	Notes
8-15	Roller Cap	TG-424-01
8-16	Thrust Washer	EZ-09-Ø8x0.25t
8-17	Roller Shaft	TG-424-02
8-18	Sleeve	TG-424-03
8-19	Roller	TG-424-04
8-20	Roller Base	TG-424-05

⤢ zoomEXPLODED VIEW 8 For Model 8SD or ½QXD and Difference of Model 2SD₂ or QXD: the guide roller on its bearings and roller holder above the display panel and mounting base, the guide pole and its screw at right, the holder nut, roller pulley and belt below driving the counter on its supporter, and, at the bottom, the differing guide roller parts for the 2SD₂ and QXD stacked in order · Redrawn as vector — zooms cleanly · view the original scan

PARTS LIST 9↑ TOP

Ref. No.	Description	Parts No.	Notes
9-1	Display Screw	TA-420-005
9-2	Screw	EZ-09-M2x4
9-3	Tape Guide	For 8SD or ½QXD:TA-211-001 For QXD or 2SD₂:TA-420-004
9-4	Tention[sic] Arm	TA-420-003
9-5	Screw	EZ-09-M3x5
9-6	Arm Shaft	TA-429-001
9-7	Slide Washer	EZ-09-5dx0.5t
9-8	Arm Holder	TA-420-002
9-9	Display Panel	TD-5250D-003
9-10	Mounting Base	TD-5250D-001
9-11	Micro Switch	SW-59-LV-3H-1A
9-12	Screw	EZ-09-M3x25
9-13	Magnetic Supporter	TY-900-023
9-14	Screw	EZ-09-M3x6
9-15	Stopper	TD-5451-006
9-16	Spring Supporter	TY-900-020
9-17	Nut	TA-420-007
9-18	Spring Holder	TA-427-001
9-19	Set Screw	EZ-09-M3x6
9-20	Plain Washer	EZ-09-M3
9-21	Spring	SG-100-047B
9-22	Switch Actuator	TA-423-002
9-23	Screw	EZ-09-M3x4
9-24	Screw	EZ-09-M3x6
9-25	Spring Holder	TA-429-002
9-26	Spring	For 8SD or ½QXD:SG-100-069 For QXD or 2SD₂:SG-100-046
9-27	Stopper Arm	TA-420-010

⤢ zoomEXPLODED VIEW 9: the two tension arm assemblies, each drawn from its tape guide and tension arm on the arm shaft down through the display panel and mounting base, with the micro switch, magnetic supporter and stopper under the base on the right, and the spring holders, springs, switch actuator and stopper arm at the bottom · Redrawn as vector — zooms cleanly · view the original scan

PARTS LIST 10↑ TOP

Ref. No.	Description	Parts No.	Notes
10-1	Push Button A	CR-824-001A
10-2	Push Button C	CR-824-001C
10-3	Push Button B	CR-824-001B
10-4	Push Button E	CR-824-001E
10-5	Push Button C	CR-823-001C
10-6	Push Button B	CR-823-001B
10-7	Push Button	CR-823-002D
10-8	Push Button	CR-823-001A
10-9	Push Button	CR-823-001A
10-10	Display Panel	TD-5250D-005
10-11	Display Panel	TD-5250D-003
10-12	Mounting Base	TD-5250D-001
10-13	Lamp Supporter	TY-900-025
10-14	Screw	EZ-09-M3x6
10-15	Lamp Assembly	PL-19-005
10-16	Screw	EZ-09-M2.6x5
10-17	Guide	CR-823-010
10-18	Switch Base	CR-823-008
10-19	Screw	EZ-09-M3x10
10-20	Micro Switch	SW-59-V-1A
10-21	Guide	CR-824-006
10-22	Screw	EZ-09-M3x6
10-23	Switch Base	CR-824-005
10-24	Power Switch PCB Assembly	PA-378
10-25	Switch Supporter L	CR-824-007L
10-26	Switch Supporter R	CR-824-007R
10-27	Micro Switch	SW-59-SS5GL
10-28	Screw	EZ-09-M2x10
10-29	Switch Supporter	CR-824-008
10-30	Screw	EZ-09-M2.6x5
10-31	Screw	EZ-09-M2x12

⤢ zoomEXPLODED VIEW 10: the push buttons along the top over the narrow button panel, the display panel and the mounting base, the lamp supporters and lamp assemblies below, the two rows of micro switches on their guides and switch bases, the power switch P.C.B. assembly at the bottom, and, at left, the switch supporters with their micro switches · Redrawn as vector — zooms cleanly · view the original scan

PARTS LIST 11-1 For Model 8SD↑ TOP

Ref. No.	Description	Parts No.	Notes
11-1	Screw	EZ-09-M2x6
11-2	Caution Label	NP-300-004
11-3	Screw	EZ-09-M3x8
11-4	Connector	CN-09-SRC02A16-10S
11-5	Screw	EZ-09-M3x8
11-6	Connector	CN-09-16-R4M
11-7	Screw	EZ-09-M3x6
11-8	Fuse Hollder[sic]	FS-89-S-N2052
11-9	Fuse	FS-19-2A
11-10	Earth Terminal	LP-09-T-10
11-11	Transistor	SC-09-2SD-325E
11-12	Power Supply IC	IC-09-7805UC
11-13	Screw	EZ-09-M3x12
11-14	Spring Washer	EZ-09-M3
11-15	Sub-Power Supply PCB Assembly	PA-307
11-16	Nut	EZ-09-M3
11-17	Connector Panel	TD-5250D-007
11-18	IC	IC-09-SI-3250E
11-19	Mother Board Assembly	PA-314
11-20	Master OSC Power Supply Assembly	PA-315
11-21	Control PCB Assembly	PA-316
11-22	Screw	EZ-09-M3x6
11-23	Control PCB Assembly
11-24	PCB Stopper	PA-314-001
11-25	Cord Stopper	RB-19-BU-3270
11-26	Power Cord	TY-556
11-27	Stopper Spacer	TD-5250-005
11-28	Plain Washer	EZ-09-M3

⤢ zoomEXPLODED VIEW 11-1 For Model 8SD: the connector panel with two rows of four connectors screwed on from above, the fuse holder and fuse, the earth terminal, transistors and power supply IC on their screws and washers, the sub-power supply P.C.B. assembly at right, the power cord with its cord stoppers and spacer, the mother board below with the master oscillator power supply and control P.C.B.s plugged into it, and, at lower left, the control P.C.B. on its screws and stoppers · Redrawn as vector — zooms cleanly · view the original scan

PARTS LIST 11-2 For Model 2SD₂ and Difference of Model QXD or ½QXD↑ TOP

Ref. No.	Description	Parts No.	Notes
11-1	Screw	EZ-09-M2x6
11-2	Caution Label	NP-300-004
11-3	Screw	EZ-09-M3x8
11-4	Connector	CN-09-SRC02A16-10S
11-5	Screw	EZ-09-M3x8
11-6	Connector	CN-09-16-R4M
11-7	Screw	EZ-09-M3x6
11-8	Fuse Holder	FS-89-S-N2052
11-9	Fuse	FS-19-2A
11-10	Earth Terminal	LP-09-T-10
11-11	Transistor	SC-09-2SD325E
11-12	Power Supply IC	IC-09-7805UC
11-13	Screw	EZ-09-M3x12
11-14	Spring Washer	EZ-09-M3
11-16	Nut	EZ-09-M3
11-17	Connector Panel	MX-5050-2SD2-001
11-18	IC	IC-09-SI-3250E
11-19	Mother Board Assy	PA-314
11-20	M.OSC Power Assy	PA-315
11-21	Control PCB Assy	PA-316
11-22	Screw	EZ-09-M3x6
11-23	Control PCB Assy
11-24	PCB Stopper	PA-314-001
11-25	Cord Stopper	RB-19-BU-3270
11-26	Power Cord	TY-556
11-27	Stopper Spacer	TD-5250-005
11-28	Plain Washer	EZ-09-M3

For Model QXD or ½QXD (Difference)↑ TOP

Ref. No.	Description	Parts No.	Notes
11-3	Screw	EZ-09-M3x8
11-4	Connector	CN-09-M3x8[sic]
11-5	Screw	EZ-09-M3x8
11-6	Connector	CN-09-16-R4M
11-29	Connector Panel	TD-5054D-001

⤢ zoomEXPLODED VIEW 11-2 For Model 2SD₂ and Difference of Model QXD or ½QXD: the connector panel with one pair of connectors, the fuse holder and fuse, the earth terminal, transistors and power supply IC, the power cord with its cord stoppers and spacer, the mother board below with its two plug-in P.C.B.s, the control P.C.B. at lower right, and, at lower left, the differing connector panel with two pairs of connectors · Redrawn as vector — zooms cleanly · view the original scan

PARTS LIST 12-1 For Model 8SD↑ TOP

Ref. No.	Description	Parts No.	Notes
12-1	Knob	NB-31-035
12-2	Set Screw	EZ-09-M3x5
12-3	Spacer	TY-100-031
12-4	Knob	NB-31-036
12-5	Spacer	TY-100-042
12-6	Screw	EZ-09-M3x8
12-7	Display Washer	TY-800-021
12-8	Sheet	TY-800-017
12-9	AMPL Display Panel	AF-237-002

⤢ zoomEXPLODED VIEW 12-1 For Model 8SD: twelve stacked knobs with their set screws and spacers above the amplifier display panel, the screws, display washers and sheets that hold it, and the amplifier in its case below · Redrawn as vector — zooms cleanly · view the original scan

PARTS LIST 12-2 For Model QXD or ½QXD↑ TOP

Ref. No.	Description	Parts No.	Notes
12-1	Knob	NB-31-035
12-2	Set Screw	EZ-09-M3x5
12-3	Spacer	TY-100-031
12-4	Knob	NB-31-036
12-5	Spacer	TY-100-042
12-6	Screw	EZ-09-M3x8
12-7	Display Washer	TY-800-021
12-8	Sheet	TY-800-017
12-9	ANPL[sic] Display Panel	AF-237-002

⤢ zoomEXPLODED VIEW 12-2 For Model QXD or ½QXD: six stacked knobs with their set screws and spacers above the amplifier display panel, the screws, display washers and sheets that hold it, and the amplifier in its case below · Redrawn as vector — zooms cleanly · view the original scan

PARTS LIST 12-3 For Model 2SD₂↑ TOP

Ref. No.	Description	Parts No.	Notes
12-1	Knob	NB-31-035
12-2	Set Screw	EZ-09-M3x5
12-3	Spacer	TY-100-031
12-4	Knob	NB-31-036
12-5	Spacer	TY-100-042
12-6	Screw	EZ-09-M3x8
12-7	Display Washer	TY-800-021
12-8	Sheet	TY-800-017
12-9	AMPL Display Panel	AF-237-002

⤢ zoomEXPLODED VIEW 12-3 For Model 2SD₂: three stacked knobs with their set screws and spacers above the amplifier display panel, the screws, display washers and sheets that hold it, and the amplifier in its case below · Redrawn as vector — zooms cleanly · view the original scan

PARTS LIST 13-1 For Model 8SD↑ TOP

Ref. No.	Description	Parts No.	Notes
13-1	Wood Screw	EZ-09-M3.5x20
13-2	Protector	CS-264-005
13-3	Screw	EZ-09-M3x25
13-4	Display Washer	TY-800-021
13-5	Sheet	TY-800-017
13-6	Case Top Board	CS-261-004
13-7	Case Side Board	CS-264-004
13-8	Display Washer	TY-800-014
13-9	Latch	CA-39-C-15
13-10	Wood Screw	EZ-09-M3.1x16
13-11	Cap Screw	EZ-09-M4x25

⤢ zoomEXPLODED VIEW 13-1 For Model 8SD: the amplifier case pulled apart: the top and bottom boards with their screws, display washers and sheets, the corner protectors and their wood screws, and the two side boards with their latches, display washers, wood screws and cap screws, around the amplifier frame · Redrawn as vector — zooms cleanly · view the original scan

PARTS LIST 13-2 For Model 2SD₂, QXD or ½QXD↑ TOP

Ref. No.	Description	Parts No.	Notes
13-1	Wood Screw	EZ-09-M3.5x20
13-2	Protector	CS-264-005
13-3	Screw	EZ-09-M3x25
13-4	Display Washer	TY-800-021
13-5	Sheet	TY-800-017
13-6	Case Top Board	CS-261-004
13-7	Case Side Board	CS-263-004
13-8	Display Washer	TY-800-014
13-9	Latch	CA-39-C-15
13-10	Wood Screw	EZ-09-M3.1x16
13-11	Cap Screw	EZ-09-M4x25

⤢ zoomEXPLODED VIEW 13-2 For Model 2SD₂, QXD or ½QXD: the shorter amplifier case pulled apart: the top and bottom boards with their screws, display washers and sheets, the corner protectors and their wood screws, and the two side boards with their latches, display washers, wood screws and cap screws, around the amplifier frame · Redrawn as vector — zooms cleanly · view the original scan

PARTS LIST 14-1 For Model 8SD↑ TOP

Ref. No.	Description	Parts No.	Notes
14-1	Screw	EZ-09-M3x6
14-2	Amplifier	AF-237
14-3	Screw	EZ-09-M3x8
14-4	Display Washer	TY-800-021
14-5	Sheet	TY-800-017
14-6	Blank Panel	CS-261-005
14-7	Stud	ST-090
14-8	Frame Stud	CS0251-007[sic]
14-9	Amplifier Frame	CS-261-001
14-10	Screw	EZ-09-M3x6
14-11	Cover	CS-261-006
14-12	Plain Washer	EZ-09-M3
14-13	Screw	EZ-09-M3x6

⤢ zoomEXPLODED VIEW 14-1 For Model 8SD: the amplifier screwed down into the amplifier frame, the blank panel across the front on its screws, display washers, sheets and studs, the frame studs between the frame sides, and the cover underneath on plain washers and screws · Redrawn as vector — zooms cleanly · view the original scan

PARTS LIST 14-2 For Model QXD or ½QXD↑ TOP

Ref. No.	Description	Parts No.	Notes
14-1	Screw	EZ-09-M3x6
14-2	Amplifier	AF-237
14-3	Screw	EZ-09-M3x8
14-4	Display Washer	TY-800-021
14-5	Sheet	TY-800-017
14-6	Blank Panel	CS-261-005
14-7	Stud	ST-090
14-8	Frame Stud	CS-0251-007
14-9	Amplifier Frame	CS-263-001
14-10	Screw	EZ-09-M3x6
14-11	Cover	CS-261-006
14-12	Plain Washer	EZ-09-M3
14-13	Screw	EZ-09-M3x6

⤢ zoomEXPLODED VIEW 14-2 For Model QXD or ½QXD: the narrower amplifier screwed down into the amplifier frame, the blank panel across the front on its screws, display washers, sheets and studs, the frame studs between the frame sides, and the cover underneath on plain washers and screws · Redrawn as vector — zooms cleanly · view the original scan

PARTS LIST 14-3 For Model 2SD₂↑ TOP

Ref. No.	Description	Parts No.	Notes
14-1	Screw	EZ-09-M3x6
14-2	Amplifier	AF-237
14-3	Screw	EZ-09-M3x8
14-4	Display Washer	TY-800-021
14-5	Sheet	TY-800-017
14-6	Blank Panel	CS-261-005
14-7	Stud	ST-090
14-8	Frame Stud	CS-0251-007
14-9	Amplifier Frame	CS-263-001
14-10	Screw	EZ-09-M3x6
14-11	Cover	CS-261-006
14-12	Plain Washer	EZ-09-M3
14-13	Screw	EZ-09-M3x6
14-14	Blank Panel	CS-261-005
14-15	Blank Panel	CS-275-002

⤢ zoomEXPLODED VIEW 14-3 For Model 2SD₂: the smaller amplifier screwed down into the amplifier frame, two blank panels stacked across the front on their screws, display washers, sheets and studs, the frame studs between the frame sides, a further blank panel below the frame, and the cover underneath on plain washers and screws · Redrawn as vector — zooms cleanly · view the original scan

PARTS LIST 15↑ TOP

Ref. No.	Description	Parts No.	Notes
15-1	Knob	NB-31-035
15-2	Set Screw	EZ-09-M3x5
15-3	Spacer	TY-100-031
15-4	Knob	NB-31-036
15-5	Spacer	TY-100-042
15-6	Push Button	NB-19-4094(302)
15-7	Push Button B	NB-19-4094B
15-8	Variable Resistor Escutcheon	TY-100-010
15-9	Push Button A	NB-19-4094A
15-10	Display Panele[sic]	AF-237-002
15-11	VU Meter	MT-11-023
15-12	Lamp Assembly	PL-19-005
15-13	VU PCB Assembly	PA-401
15-14	Spring Washer	EZ-09-M3
15-15	Screw	EZ-09-M3x6
15-16	Screw	EZ-09-M3x6
15-17	Blind	TY-900-031
15-18	Blind	TY-900-029
15-19	Screw	EZ-09-M2.6x4
15-20	Amplifier Mounting Base	AF-234-002
15-21	Switch PCB Assembly B	PA-305
15-22	Stereo Jack	CN-09-LJ-109
15-23	Switch PCB Assembly A	PA-304
15-24	Nut	EZ-09-M3
15-25	Slide Switch C	SW-39-SL242B4
15-26	Shielding Plate A	AF-198-002
15-27	Amplifier Chassis	AF-234-004
15-28	Cord Stopper	EZ-09-SN-6A
15-29	Screw	EZ-09-M3x10
15-30	VR PCB Assembly	PA-373
15-31	Connector	CN-09-SRC06A16-10P
15-32	Mother PCB Assembly	PA-345
15-33	Connector	CN-09-16-P4F
15-34	Reproduce Amplifier PCB Assembly	PA-372
15-35	SEL REP Amplifier PCB Assembly	PA-375
15-36	Record Amplifier PCB Assembly	PA-371
15-37	Test OSC PCB Assembly	PA-379
15-38	BIAS Buffer Amprifier[sic] PCB Assembly	PA-376(8SD) PA-419(½QXD) PA391[sic](QXD) PA-418(2SD₂)
15-39	Connector	CN-09-QS-10M(I)
15-40	Jack	CN-09-LJ-110-1-2
15-41	Shielding Plate B	AF-198-003
15-42	Rear Panel	AF-237-004
15-43	Shielding Plate C	AF-198-004
15-44	Screw	EZ-09--M3x10[sic]
15-45	Connector	CN-09-MR-8M
15-46	Screw	EZ-09-2.6x8[sic]
15-47	Sheet	TY-800-017
15-48	Plain Washer	EZ-09-M3
15-49	Screw	EZ-09-M3x8
15-50	Socket	CN-09-XLR-3-31
15-51	Socket	CN-09-XLR-3-32
15-52	Screw	EZ-09-M3x6

⤢ zoomEXPLODED VIEW 15: the amplifier taken apart from top to bottom: the knobs, push buttons and variable resistor escutcheon above the display panel, the VU meters, lamp assemblies and VU P.C.B. below it, the blinds and the amplifier mounting base with switch P.C.B. assemblies A and B, the stereo jack and slide switch, the amplifier chassis with its shielding plates, the mother P.C.B. with the reproduce, record, SEL REP, test oscillator and bias buffer amplifier P.C.B.s plugged into it, the VR P.C.B. and the two connector cables, and the rear panel at the bottom with its connectors, jacks and XLR sockets · Redrawn as vector — zooms cleanly · view the original scan

SIMPLIFIED DIAGRAM FOR 8SD AND QXD (at 1KHZ)↑ TOP

A block diagram of one channel's record and reproduce signal path, marked with the signal level at each stage for a 1 kHz signal; values in parentheses are for the QXD. It runs from the microphone and line inputs through the line input and record output amplifiers to the record head, with the 133 kHz master oscillator and bias buffer amplifier feeding the erase and record heads, and from the reproduce head through the reproduce equalizer and line output amplifiers to the line output, headphone and VU meter, with the sel-rep amplifier and test oscillator alongside.

⤢ zoomSIMPLIFIED DIAGRAM FOR 8SD AND QXD (at 1KHZ): block diagram of the record and reproduce signal path with the signal level marked at each stage, erase and bias current check points, and the line, headphone and meter outputs · Redrawn as vector — zooms cleanly · view the original scan

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RECORD AMPLIFIER UNIT (PA-371)↑ TOP

The record amplifier board (PA-371): a two-transistor microphone preamplifier, a TA7129P line amplifier, and a record output stage with switched equalizer capacitors and a muting FET. The notes list the transistor types and a table of equalizer connections for NAB and CCIR at each speed pair.

⤢ zoomRECORD AMPLIFIER UNIT (PA-371): schematic of the microphone preamplifier, line amplifier and record output stage, with notes on transistor types and an NAB/CCIR equalizer connection table · Redrawn as vector — zooms cleanly · view the original scan

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RECORD AMPLIFIER P.C.B Ass'y PA-371 (PM-871A)↑ TOP

Component layout of the record amplifier board PA-371, printed board PM-871A, with the equalizer jumper points lettered A to K.

⤢ zoomRECORD AMPLIFIER P.C.B Ass'y PA-371 (PM-871A): component layout of the record amplifier board · Redrawn as vector — zooms cleanly · view the original scan

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REPRODUCE AMPLIFIER UNIT (PA-372)↑ TOP

The reproduce amplifier board (PA-372): a discrete reproduce preamplifier with FET-switched equalization, a line output amplifier with a complementary output pair and the high/low output level switch, and a transformer-coupled headphone amplifier. The notes list the transistor types.

⤢ zoomREPRODUCE AMPLIFIER UNIT (PA-372): schematic of the reproduce preamplifier and equalizer, line output amplifier with output level switch, and headphone amplifier · Redrawn as vector — zooms cleanly · view the original scan

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REPRODUCE AMPLIFIER P.C.B Ass'y PA-372 (PM-872A)↑ TOP

Component layout of the reproduce amplifier board PA-372, printed board PM-872A, with switch SW1 and headphone transformer T1.

⤢ zoomREPRODUCE AMPLIFIER P.C.B Ass'y PA-372 (PM-872A): component layout of the reproduce amplifier board · Redrawn as vector — zooms cleanly · view the original scan

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SEL. REP. AMPLIFIER (PA-375)↑ TOP

The sel-rep amplifier board (PA-375): two identical channels, L and R, each a transistor and FET amplifier between RC networks, with an output level pot. The notes list the transistor types.

⤢ zoomSEL. REP. AMPLIFIER (PA-375): schematic of the two-channel sel-rep amplifier · Redrawn as vector — zooms cleanly · view the original scan

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SEL. REP. AMPLIFIER P.C.B. Ass'y PA-375 (PM-874A)↑ TOP

Component layout of the sel-rep amplifier board PA-375, printed board PM-874A, with the R and L channels laid out as mirror images.

⤢ zoomSEL. REP. AMPLIFIER P.C.B. Ass'y PA-375 (PM-874A): component layout of the two-channel sel-rep amplifier board · Redrawn as vector — zooms cleanly · view the original scan

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TEST OSCILLATOR UNIT (PA-379)↑ TOP

The test oscillator board (PA-379): a 741 op-amp oscillator with FET amplitude control, and four FET switches that put the oscillator onto the L and R outputs in place of the inputs. The notes list the transistor and diode types.

⤢ zoomTEST OSCILLATOR UNIT (PA-379): schematic of the op-amp oscillator and the FET switches between the inputs and outputs · Redrawn as vector — zooms cleanly · view the original scan

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TEST OSCILLATOR P.C.B. Ass'y PA-379 (PM-878)↑ TOP

Component layout of the test oscillator board PA-379, printed board PM-878.

⤢ zoomTEST OSCILLATOR P.C.B. Ass'y PA-379 (PM-878): component layout of the test oscillator board · Redrawn as vector — zooms cleanly · view the original scan

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BIAS BUFFER AMPLIFIER UNIT PA-418 for 2SD₂ PA-419 for ½QXD PA-391 for QXD PA-376 for 8SD↑ TOP

One schematic for the four versions of the bias buffer amplifier: for each channel, a push-pull transistor stage drives a transformer that delivers the erase and bias outputs, switched by the record command. A table gives what differs between models: the transformers L1 and L101, C8 and C108, and resistors R13, R113, R14 and R114.

⤢ zoomBIAS BUFFER AMPLIFIER UNIT: schematic of the two-channel bias buffer amplifier with its erase and bias outputs, and a table of the parts that differ between the 2SD₂, QXD, ½QXD and 8SD versions · Redrawn as vector — zooms cleanly · view the original scan

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BIAS BUFFER AMPLIFIER P.C.B. Ass'y (PM-822A)↑ TOP

Component layout of the bias buffer amplifier board, printed board PM-822A, shared by all four versions, with the R and L channels side by side and their transformers L101 and L1 at the bottom.

⤢ zoomBIAS BUFFER AMPLIFIER P.C.B. Ass'y (PM-822A): component layout of the bias buffer amplifier board · Redrawn as vector — zooms cleanly · view the original scan

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VR P.C.B. Assy PA-373 (PM-873)↑ TOP

Component layout of the VR board PA-373, printed board PM-873, carrying the eight calibration pots VR1 to VR8 and connector CN13F. The sheet refers to the record reproduce electronics wiring diagram for its connections.

⤢ zoomVR P.C.B. Assy PA-373 (PM-873): component layout of the VR board with pots VR1 to VR8 · Redrawn as vector — zooms cleanly · view the original scan

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VU P.C.B. Ass'y PA-401 (PM-901)↑ TOP

Foil pattern of the VU board PA-401, printed board PM-901, with the R and L sides marked. The sheet refers to the record reproduce electronics wiring diagram.

⤢ zoomVU P.C.B. Ass'y PA-401 (PM-901): foil pattern of the VU board · Redrawn as vector — zooms cleanly · view the original scan

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SWITCH P.C.B. Ⓐ Ass'y PA-304 (PM-812)↑ TOP

Layout of switch board A, PA-304, printed board PM-812, with switches SW1 to SW3 and lettered connection points. The sheet refers to the record reproduce electronics wiring diagram.

⤢ zoomSWITCH P.C.B. Ⓐ Ass'y PA-304 (PM-812): layout of switch board A with switches SW1 to SW3 · Redrawn as vector — zooms cleanly · view the original scan

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AMPLIFIER MOTHER P.C.B. Ass'y PA-345 (PM-817A)↑ TOP

Layout of the amplifier mother board PA-345, printed board PM-817A, drawn sideways: the edge connectors for the reproduce, sel-rep, test oscillator, record and bias boards, the relays, and the connectors to the switch boards, the VR board and the deck. The sheet refers to the record reproduce electronics wiring diagram.

⤢ zoomAMPLIFIER MOTHER P.C.B. Ass'y PA-345 (PM-817A): layout of the amplifier mother board with its plug-in board connectors and relays · Redrawn as vector — zooms cleanly · view the original scan

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CONTROL UNIT (PA-316)↑ TOP

The transport control board (PA-316): TTL logic that takes the STOP, RWD, F FWD, PLAY, EDIT, REC, MOTION SENSING and QUICK START inputs and drives transistor outputs for rewind, fast forward, play, record and the supply and take-up brakes. The notes list the IC, transistor and diode types.

⤢ zoomCONTROL UNIT (PA-316): schematic of the TTL transport control logic, from the function inputs to the transistor drivers for the transport functions and brakes · Redrawn as vector — zooms cleanly · view the original scan

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CONTROL P.C.B. Ass'y PA-316 (PM-825A)↑ TOP

Component layout of the control board PA-316, printed board PM-825A, with integrated circuits IC1 to IC14 in two rows.

⤢ zoomCONTROL P.C.B. Ass'y PA-316 (PM-825A): component layout of the control board with IC1 to IC14 · Redrawn as vector — zooms cleanly · view the original scan

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MASTER OSCILLATOR AND POWER SUPPLY UNIT (PA-315)↑ TOP

The master oscillator and power supply board (PA-315): the transistor oscillator that produces the bias output, and the rectifiers and filters for the +10.5 V, +34 V, +36 V, regulated +30 V and −7 V supplies. The notes list the transistor types and that C20 and C21 are used on the 8SD only.

⤢ zoomMASTER OSCILLATOR AND POWER SUPPLY UNIT (PA-315): schematic of the master oscillator and the rectified and regulated supplies · Redrawn as vector — zooms cleanly · view the original scan

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MASTER OSCILLATOR AND POWER SUPPLY P.C.B. Ass'y PA-315 (PM-824)↑ TOP

Component layout of the master oscillator and power supply board PA-315, printed board PM-824, with the rectifier diodes along the left and the filter capacitors in the middle.

⤢ zoomMASTER OSCILLATOR AND POWER SUPPLY P.C.B. Ass'y PA-315 (PM-824): component layout of the master oscillator and power supply board · Redrawn as vector — zooms cleanly · view the original scan

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MX-5050 2S D₂ HEAD ASSEMBLY (PA-387)↑ TOP

Head wiring for the 2SD₂: the two-channel record/erase head and the reproduce head wired through the head board PA-387, with the 100 Ω resistors R1 to R4 and the reproduce head selecting switch SW1 for 2-track and 4-track playback.

⤢ zoomMX-5050 2S D₂ HEAD ASSEMBLY (PA-387): wiring of the record/erase and reproduce heads through the head board, with the 2T/4T reproduce head selecting switch · Redrawn as vector — zooms cleanly · view the original scan

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MX-5050 2SD₂ HEAD P. C. B. Ass'y PA-387 (PM-887)↑ TOP

Layout of the 2SD₂ head board PA-387, printed board PM-887, with resistors R1 to R4 and switch SW1.

⤢ zoomMX-5050 2SD₂ HEAD P. C. B. Ass'y PA-387 (PM-887): layout of the 2SD₂ head board · Redrawn as vector — zooms cleanly · view the original scan

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MX-5050 ½QXD, QXD HEAD ASSEMBLY (PA-386)↑ TOP

Head wiring for the ½QXD and QXD: the record/erase heads for channels 1/3 and 2/4 and the matching reproduce heads, wired through the head board PA-386 with resistors R1 to R8.

⤢ zoomMX-5050 ½QXD, QXD HEAD ASSEMBLY (PA-386): wiring of the four-channel record/erase and reproduce heads through the head board · Redrawn as vector — zooms cleanly · view the original scan

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MX-5050 QXD HEAD P. C. B. Ass'y PA-386 (PM-886)↑ TOP

Layout of the QXD head board PA-386, printed board PM-886, with resistors R1 to R8.

⤢ zoomMX-5050 QXD HEAD P. C. B. Ass'y PA-386 (PM-886): layout of the QXD head board · Redrawn as vector — zooms cleanly · view the original scan

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MX-5050 8SD HEAD ASSEMBLY↑ TOP

Head wiring for the 8SD: the record/erase heads for channels 1/2, 3/4, 5/6 and 7/8 wired to connector CN202, and the four reproduce heads wired to CN201, with the wire colour of each lead.

⤢ zoomMX-5050 8SD HEAD ASSEMBLY: wiring of the eight-channel record/erase and reproduce heads to connectors CN202 and CN201, with wire colours · Redrawn as vector — zooms cleanly · view the original scan

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CAPSTAN SERVO MOTER[sic] POWER SUPPLY P.C.B. PA-377 (PM-875A)↑ TOP

Component layout of the capstan servo motor power supply board PA-377, printed board PM-875A, with relays RL1 and RL2 and regulator IC1. The sheet refers to the tape transport electronics wiring diagram.

⤢ zoomCAPSTAN SERVO MOTER POWER SUPPLY P.C.B. PA-377 (PM-875A): component layout of the capstan servo motor power supply board · Redrawn as vector — zooms cleanly · view the original scan

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POWER SWITCH P.C.B. Ass'y PA-378 (PM-833A)↑ TOP

Layout of the power switch board PA-378, printed board PM-833A, with the EDIT, REEL, SPEED and POWER switches and lettered connection points. The sheet refers to the tape transport electronics wiring diagram.

⤢ zoomPOWER SWITCH P.C.B. Ass'y PA-378 (PM-833A): layout of the power switch board with the EDIT, REEL, SPEED and POWER switches · Redrawn as vector — zooms cleanly · view the original scan

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TRANSPORT MOTHER P.C.B. Ass'y PA-314 (PM-823A)↑ TOP

Layout of the transport mother board PA-314, printed board PM-823A, with relays RL1 (RWD), RL2 (FFWD) and RL3 (PLAY) and numbered edge connections. The sheet refers to the tape transport electronics wiring diagram.

⤢ zoomTRANSPORT MOTHER P.C.B. Ass'y PA-314 (PM-823A): layout of the transport mother board with the RWD, FFWD and PLAY relays · Redrawn as vector — zooms cleanly · view the original scan

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MX-5050 2SD₂,QXD, ½QXD,8SD RECORD REPRODUCE ELECTTRONICS[sic] (AF-237) WIRING DIAGRAM↑ TOP

Interconnect wiring for the record/reproduce electronics: the amplifier mother board (PA-345) with the reproduce (PA-372), sel-rep (PA-375), test oscillator (PA-379), record (PA-371) and bias buffer boards plugged into it, wired to switch boards A and B (PA-304, PA-305), the VU board (PA-401) and the VR board (PA-373), and out to the line, microphone, headphone, noise-reduction remote, deck and head connectors. This sheet prints the board number in full, (AF-237).

⤢ zoomMX-5050 2SD₂,QXD, ½QXD,8SD RECORD REPRODUCE ELECTTRONICS (AF-237) WIRING DIAGRAM: the amplifier mother board and its plug-in boards wired to the switch, VU and VR boards and the input, output and head connectors · Redrawn as vector — zooms cleanly · view the original scan

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MX-5050 2SD₂,QXD, ½QXD,8SD TAPE TRANSPORT ELECTRONICS (TD-5250D) WIRING DIAGRAM↑ TOP

Interconnect wiring for the tape transport electronics: the 8SD and QXD head assemblies, the capstan motor and its power supply board (PA-377), the take-up and supply motors, the power transformer, the power switch board (PA-378), the transport mother board (PA-314) with the control board (PA-316) and the master oscillator and power supply board (PA-315), and the remote control unit (CR-705A).

⤢ zoomMX-5050 2SD₂,QXD, ½QXD,8SD TAPE TRANSPORT ELECTRONICS (TD-5250D) WIRING DIAGRAM: head assemblies, motors, power transformer and transport boards wired together, with the remote control unit · Redrawn as vector — zooms cleanly · view the original scan

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