Installation

This section of the manual provides information about unpacking and inspection, location and environment, mounting configurations, and power and signal connections.

2-1. UNPACKING AND INSPECTION↑ TOP

The MX-5050 Series system is shipped from the factory in individual cardboard packing cases. Upon receipt, examine the case for any signs of damage. Unpack the equipment carefully and inspect for any signs of damage. Use great care when unpacking unmounted equipment and removing packing materials to prevent damage to critical components such as the capstan, head assembly, and tension arms.

Referring to Table 1-4 and 1-5 (as applicable), verify that all items have been received. Report any shortage or damage to the carrier and your local Otari dealer. Save the packing case for possible shipment of the equipment to another location or for re-shipment. Other packaging may cause the[sic] damage during transportation and will void the warranty.

Regarding the repacking method, please refer to the illustration which is attached on the flap of the individual box.

2-2. LOCATION AND ENVIRONMENT↑ TOP

The area chosen for operation should be adequately ventilated and dust free. Since recording is by an electromagnetic process, it is possible that strong electromagnetic fields may affect the system adversely. Common sources of interference are fluctuating loads on nearby high-voltage lines, heavy duty transformers, and transmitting equipment.

It is recommended that the equipment be used in an environment where the surrounding temperature does not exceed limits of 40° to 104°F (5° to 40°C), with the relative humidity between 20 to 80%. Allow at least four-inches[sic] clearance behind the rear-panel.

2-3. MOUNTING CONFIGURATIONS↑ TOP

The MX-5050 Series can be operated vertically or horizontally in the portable case or vertically in a common 19-inch rack using an optional rack mount adapter kit (Table 1-5). The MX-5050 in a rack mount adapter requires 19¼ inches of rack space. Maximum cooling efficiency is obtained when the unit is mounted vertically. An optional floor console for table height horizontal operation is also available as an option. Equipment dimensions of the MX-5050 Series are shown in Fig. 2-1.

⤢ zoomFig. 2-1 Equipment Dimensions: four elevation drawings — the tape transport of the QXD, ½QXD and 8SD in front and side view; the amplifier of the 2SD₂, QXD and ½QXD in front and side view; the amplifier of the 8SD in front and side view; and the table top console of the 2SD₂ in front and side view — each fully dimensioned

Fig. 2-1. Equipment Dimensions[sic][sic]

2-4. POWER AND SIGNAL CONNECTIONS↑ TOP

All power and signal connections are made to the connector panel at the rear of the MX-5050. Table 2-1.[sic] shows the function of each connector and component on the rear panel.

Table 2-1. Rear Connector Panel

⤢ zoomRear Connector Panel, left half: the 2SD₂/QXD amplifier's rear panel with connectors numbered 1 through 9

⤢ zoomRear Connector Panel, right half: the 8SD amplifier's rear panel, four channel pairs stacked, with connectors and controls numbered 10 through 22

Index No.	Name	Function
1.	EXTernal SERVO Control Connector (Optional)	Included with dc servo versions to synchronize tape speed with signal of other equipment.
2.	REMOTE Control Connector	For use with optional remote control unit to control record, play, stop, rewind, and fast forward.
3.	TO AMPlifier Connector	Female QS-type connector to supply power, bias signal, and control signal for amplifier.
4.	REPRODUCE HEAD Connector	Female RB-type connector for reproduce signal, connected by cable from amplifier.
5.	RECORD/ERASE HEAD Connector	Female SRC-type connector for record and erase signal, connected by cable from amplifier.
6.	Label	Indicates Model Number, production lot (serial number), power requirements and "Made in Japan".
7.	GROUND Terminal	Auxiliary ground connection for use with equipment not connected to common ground.
8.	Fuse	Main power fuse. For replacement use 2A fuse, Otari part No. FS19-MGC2A.
9.	AC IN Cable	Captive three-wire cable for connection to power and power ground.
10.	Reproduce Head Connector Cable	Connected to REPRODUCE HEAD Connector for reproduce signal.
11.	LINE OUTput Level Selector Switch	Two-position output level switch to select +4dBm or −10dBm fixed output level (standard reference level: SRL).
12.	REProduce EQualization Adjustment Screws	Used to adjust frequency characteristics for reproduce equalization in case of part replacement or calibration.
13.	LINE OUTput Connector	Male XLR-type connector for unbalanced line output impedance, 600 ohms. For 600 ohms balanced line output, use optional transformer (Otari Part No. ET-31-182).
14.	LINE INput Connector	Female XLR-type connector for unbalanced line input impedance, 50k ohms. For 600 ohm[sic] balanced input, use optional matching transformer (Otari Part No. ET-21-181).
15.	SELective REProduction LEVEL Adjustment Screws	Used to adjust SEL/REP level in case of part replacement or calibration.
16.	RECord CALibration	Used to adjust record monitor (SOURCE) level in case of part replacement or calibration.
17.	Test OSCillator Level CALibration	Used to adjust test oscillator output level calibration.
18.	RECord Monitor LEVEL Adjustment Screws	Used to adjust recording level in case of part replacement or calibration.
19.	TO DECK Connector	Male QX-type connector to receive power, bias and control signal from deck.
20.	Noise Reduction REMOTE Control Connector	MR-type connector for dbx or DOLBY noise reduction system, switching record/reproduce mode of noise reduction system for each channel.
21.[sic]	MICrophone Input Jack	Standard 2-conductor phone jack for microphone: −70dBm, unbalanced, Applicable Microphone impedance 150-10k ohms.
22.	Record/Erase Head Connector Cable	Connected to RECORD/ERASE HEAD for record and erase signal.

2-4-(1) AC POWER CONNECTION↑ TOP

The MX-5050 Series is factory set to operate at the line voltage and frequency indicated on the packing case and on the rear connector panel of equipment. Ac[sic] power is connected by means of a captive three-wire power cable which also provides a common ground connection. If a two-wire receptacle is used with an adapter, be sure the adapter is properly grounded.

If some other change of line voltage and frequency is desired to accomodate[sic] a different power requirement, please contact your nearest dealer or Otari.

2-4-(2) SIGNAL CONNECTIONS↑ TOP

The reproduce head connectors are four-conductor male RB-type connector, connected directly to the rear of amplifier. The record and erase head connectors are ten-conductor male SRC-type connector, connected directly to the rear of amplifier. The microphone input connectors are standard two-conductor phone jacks. The line input (female) and line output (male) connectors are XLR-type connectors. The amplifier to transport connector is QS-type connector. The mating connectors (not supplied) may be wired for balanced or unbalanced input as follows:

LINE INPUT CONNECTOR WIRING: For balanced input, wire male XLR-connector as follows:

1. Connect signal leads of two-conductor shielded cable to pin 3 (high) and pin 2 (low)[sic] of connector.
2. Connect cable shield to pin 1.

For unbalanced input using two-conductor shielded cable, wire female XLR-connector as follows.

1. Connect signal leads of cable to pin 3[sic] (high) and pin 2 (low) of connector.
2. Connect cable shield to pin 1 of connector.
3. Connect a jumper from pin 1 to pin 2 of connector.

For unbalanced input using single conductor shielded cable, wire male XLR-connector as follows.

1. Connect center conductor of single-conductor shielded cable to pin 3 of connector.
2. Connect cable shield to pins 2 and 1.

LINE OUTPUT CONNECTOR WIRING:[sic] For balanced output, wire female XLR-connector as follows:

1. Connect signal leads of two-conductor shielded cable to pin 3 (high) and pin 2 (low) of connector.
2. Connect cable shield to pin 1.

For unbalanced output using two-conductor shielded cable, wire female XLR-connector as follows:

1. Connect signal leads of cable to pin 3 (high) and pin 2 (low) of connector.
2. Connect cable shield to pin 1 of connector.
3. Connect a jumper from pin 1 to pin 2 of connector.

For unbalanced output using single-conductor shielded cable, wire female XLR-connector as follows:

1. Connect center conductor cable to pin 3 of connector.
2. Connect cable shield to pin 2 of connector.
3. Connect a jumper between pin 1 and 2 of connector.

NOISE REDUCTION CONNECTOR WIRING: This circuit is shown in Fig. 2-2.

In this circuit, switching relays are automatically closed in record mode for noise reduction system. Using 4-conductor cable, wire male MR-connector as follows:

1. Connect left channel leads of cable to pin 1 and pin 6 of connector.
2. Connect right channel leads of cable to pin 3 and pin 8 of connector.

⤢ zoomFig. 2-2 Noise Reduction Circuit: the CN12M noise reduction remote connector's eight pins tabulated against their function — four not-connected, then two pins each for the right and left noise-reduction channels — with the right pair wired out to REC/ON and RL5-d switch contacts and the left pair to RL4-d and REC/ON

Fig. 2-2. Noise Reduction Circuit