Otari MX-5050 Mini Pro

BQ-II Instruction and Maintenance Manual — Digital Edition · Part 0 · PDF pages 1-8

Front Matter

The OTARI wordmark in block letters with a registered-trademark symbol.⤢ zoomThe OTARI wordmark in block letters with a registered-trademark symbol.

MX-5050 BQ II
PROFESSIONAL RECORDER

INSTRUCTION AND MAINTENANCE MANUAL

An MX-5050 BQ II tape recorder in its upright console cabinet, with two OTARI-branded 10½-inch reels above a control panel carrying four VU meters.⤢ zoomAn MX-5050 BQ II tape recorder in its upright console cabinet, with two OTARI-branded 10½-inch reels above a control panel carrying four VU meters.

CAUTION

To prevent fire or shock hazard:

Do not expose this appliance to rain or moisture". Do not remove back.

No user-serviceable parts inside.

Refer servicing to qualified service personnel.

SAFETY INSTRUCTIONS↑ TOP

  1. Read Instructions -- All the safety and operating instructions should be read before the appliance is operated.

  2. Retain Instructions -- The safety and operating instructions should be retained for future reference.

  3. Heed Warnings -- All warnings on the appliance and in the operating instructions should be adhered to.

  4. Follow Instructions -- All operating and use instructions should be followed.

  5. Water and Moisture -- The appliance should not be used near water - for example, near a bathtub, washbowl, kitchen sink, laundry tub, in a wet basement, or near a swimming pool, etc.

  6. Carts and Stands -- The appliance should be used only with a cart or stand that is recommended by the manufacturer.

  7. Ventilation -- The appliance should be situated so that its location or position does not interfere with its proper ventilation.

    For example, the appliance should not be situated on a bed, sofa, rug, or similar surface that may block the ventilation openings; or, placed in a built-in installation, such as a bookcase or cabinet that may impede the flow of air through the ventilation openings.

  8. Heat -- The appliance should be situated away from heat sources such as radiators, heat registers, stoves, or other appliances (including amplifiers) that produce heat.

  9. Power Sources -- The appliance should be connected to a power supply only of the type described in the operating instructions or as marked on the appliance.

  10. Grounding or Polarization -- The precautions that should be taken so that the grounding or polarization means of an appliance is not defeated.

  11. Power-Cord Protection -- Power-supply cords should be routed so that they are not likely to be walked on pinched by items placed upon or against them, paying particular attention to cords at plugs, convenience receptacles, and the point where they exit from the appliance.

  12. Cleaning -- The appliance should be cleaned only as recommended by the manufacturer.

  13. Nonuse periods -- The power cord of the appliance should be unplugged from the outlet when left unused for a long period of time.

  14. Object and Liquid Entry -- Care should be taken so that objects do not fall and liquids are spilled into the enclosure through openings.

  15. Damage Requiring Service -- The appliance should be serviced by qualified service personnel when:

    A. The power-supply cord or the plug has been damaged; or

    B. Objects have fallen, or liquid has been spilled into the appliance; or

    C. The appliance has been exposed to rain; or

    D. The appliance does not appear to operate normally or exhibits marked change in performance; or

  16. Servicing -- The user should not attempt to service the appliance beyond that described in the operating instructions.

    All other servicing should be referred to qualified service personnel.

MX-5050 BQ II
PROFESSIONAL TAPE RECORDER

INTRODUCTION↑ TOP

This manual provides descriptive information, installation, operation, it maintenance and normal adjustment instructions for the Otari MX-5050 BQIT Professional Tape Recorder.

The MX-5050 BQ II in its upright console, seen at an angle, with OTARI reels mounted above the four-meter control panel.⤢ zoomThe MX-5050 BQ II in its upright console, seen at an angle, with OTARI reels mounted above the four-meter control panel.

MX-5050 BQ IT Recorder

COMMUNICATION WITH OTARI↑ TOP

-FOR SERVICE INFORMATION AND PARTS-

OTARI PRODUCTS are manufactured under strict quality control and each unit is carefully tested and inspected prior to shipment from our factory.

If, however, adjustment or technical support becomes necessary, replacement parts are required or technical questions arise, please contact your nearest Otari dealer or write to:

OTARI ELECTRIC CO., LTD.OTARI CORPORATION
4-29-18, Minami Ogikubo,2 Davis Drive, Belmont
Suginamiku, Tokyo, 167, JapanCalifornia 94002, U.S.A.
Phone: (03) 333-9631Phone: (41 5) 592-8311
Telex No.: OTRDENKI J26604Telex No.: TWX 910-376-4890

OTARI ELECTRIC DEUTSCHLAND GmbH

Gielen Starasse
4040 Neuss 1
F.R. Germany
TEL :02101-274011 , 12
TLX :418517691

Another part of Otari's continuous technical support program for our products is the continuous revision of manuals as the equipment is improved or modified. In order to receive information and service applicable to your equipment, and for technical support to function properly, please include the following information, most of which can be obtained from the nameplate on the equipment when you communicate with Otari.

  1. Model Number
  2. Serial Number
  3. Date of purchase
  4. Name and address of dealer from whom unit was purchased
  5. Power requirements (voltage and frequency)
  6. Manual number to which you are referring

Table of Contents↑ TOP

SECTION 11
GENERAL INFORMATION1
1 -1SYSTEM DESCRIPTION1
1-1-(1)TAPE TRANSPORT2
1-1-(2)RECORD/REPRODUCE ELECTRONICS4
1-2STANDARD ACCESSORIES5
1-3OPTIONAL ACCESSORIES5
1-4SPECIFICATIONS6
SECTION 21
INSTALLATION1
2-1UNPACKING AND INSPECTION1
2-2LOCATION AND ENVIRONMENT1
2-3DIMENSIONS2
2-4OPERATING POSITION2
2-5STANDARD SWITCH POSITION ON SHIPMENT3
2-6POWER AND SIGNAL CONNECTIONS4
2-6-(1)AC POWER CONNECTION5
2-6-(2)SIGNAL CONNECTIONS5
SECTION 31
OPERATION1
3-1CONTROLS AND INDICATORS1
3-2OPERATING INFORMATION7
3-2-(1)USING THE REEL HOLD DOWN KNOBS7
3-2-(2)PRE-OPERATING PROCEDURE8
3-2-(3)REPRODUCTION9
3-2-(4)NORMAL RECORDING9
3-2-(5)RECORDING WITH SELECTIVE REPRODUCTION10
3-2-(7)EDITING AND SPLICING TAPE11
SECTION 41
GENERAL INFORMATION OF MAINTENANCE1
4-1TEST AND MAINTENANCE EQUIPMENT REQUIREMENTS1
SECTION 51
ROUTINE MAINTENANCE AND CONVERSION INFORMATION1
5-1ROUTINE MAINTENANCE1
5-1-(1)CLEANING1
5-1-(2)DEMAGNETIZING2
5-1-(3)LUBRICATION4
5-2TAPE REPLACEMENT5
5-3EQUALIZER CHANGE5
5-5FUSE REPLACEMENT6
SECTION 61
TAPE TRANSPORT MAINTENANCE1
6-1TRANSPORT ACCESS1
6-2BRAKE ADJUSTMENT2
6-3CAPSTAN PINCH ROLLER PRESSURE ADJUSTMENT4
6-4TAPE SPEED ADJUSTMENT5
6-5TAPE TRANSPORT TIMING CHART6
6-6RECORDING PROCESS TIMING CHART8
SECTION 71
PERFORMANCE TESTING AND ELECTRONIC ALIGNMENT1
7-1GENERAL NOTICE1
7-3TEST CONDITIONS2
7-4PERFORMANCE TESTS2
7-4-(1)OVERALL SIGNAL-TO-NOISE2
7-4-(2)OVERALL DISTORTION TEST3
7-4-(3)CROSSTALK TESTS4
7-4-(4)ERASURE TEST5
7-4-(5)TAPE SPEED MEASUREMENT5
7-4-(6)FLUTTER AND WOW TEST6
7-5ACCESS TO ELECTRONICS ASSEMBLY8
7-6ELECTRONIC ALIGNMENT8
7-6-(1)REPRODUCE SYSTEM9
7-6-(2)REPRODUCE HEAD AZIMUTH ADJUSTMENT10
7-6-(3)FREQUENCY RESPONSE11
7-6-(4)SRL (REPRO LEVEL) ADJUSTMENT12
7-6-(5)SEL/REP. LEVEL ADJUSTMENT12
7-6-(6)RECORD SYSTEM12
7-6-(7)RECORD HEAD AZIMUTH ADJUSTMENT12
7-6-(9)OVERALL FREQUENCY RESPONSE17
7-6-(10)MONITOR INPUT LEVEL and VU METER LEVEL ADJUSTMENT18
7-6-(11)TEST OSC LEVEL ADJUSTMENT18
7-6-(12)RECORD LEVEL ADJUSTMENT19
7-6-(13)PEAK INDICATOR TRIGGER LEVEL ADJUSTMENT19
SECTION 81
MAJOR COMPONENT REPLACEMENT1
8-1REEL MOTOR ASSEMBLY REPLACEMENT1
8-1-(1)REEL TABLE REPLACEMENT AND HEIGHT ADJUSTMENT1
8-1-(2)REEL MOTOR REPLACEMENT2
8-1-(3)BRAKE ARM ASSEMBLY AND BRAKE SOLENOID REPLACEMENT3
8-2POWER TRANSFORMER REPLACEMENT3
8-3CAPSTAN MOTOR REPLACEMENT4
8-5HEAD ASSEMBLY REPLACEMENT5
8-5-(1)DESCRIPTION5
8-5-(2)HEAD STACK REPLACEMENT6
8-5-(3)RECORD AND REPRODUCE HEAD ADJUSTMENT8
8-5-(4)ERASE HEAD ALIGNMENT8
SECTION 91
TROUBLESHOOTING1
9-1PRELIMINARY PROCEDURES1
9-2TROUBLESHOOTING HINTS1
SECTION 1001
PARTS LISTS AND SCHEMATICS1
10-1SAFETY COMPONENTS2
10-2ASSEMBLY HARDWARE CODING3
10-3PARTS LISTS AND EXPLODED VIEW4