Installation

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

2-1 UNPACKING AND INSPECTION↑ TOP

The MX-5050 MK III-4 system is shipped from the factory in a single cardboard packing case.

Upon receipt, examine the case for any sign of damage.

Unpack the equipment and inspect for any sign of damage.

Use great care when unpacking the equipment and removing packing materials to prevent damage to critical components such as the capstan, head assembly, and tension arms.

Referring to Table 1-1 and Table 1-2 (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 in case of reshipment.

Other packaging may cause damage during transportation and will void the warranty.

Regarding the repacking method, please refer to the illustration which is attached to a flap of the packing 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, transmitting equipment, and air conditioners.

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 and 80%.

Allow at least a 4 inch (approx. 10 cm) clearance behind the rear-panel.

2-3 DIMENSIONS↑ TOP

Dimensions of the MX-5050 MK III-4 are shown in Figure 2-1.

⤢ zoomLeft-side and front elevation line drawings of the MX-5050 MK III-4 with dimension arrows for its overall width, height and depth in millimeters and inches.

Figure 2-1 Dimensions

2-4 STANDARD SWITCH POSITION ON SHIPMENT↑ TOP

LINE INPUT LEVEL and OUTPUT LEVEL switches are provided on the adjusting panel in the record/reproduce electronics and the MIC attenuator switches are provided on the front panel of the electronics on the MX-5050 MK III-4.

These switches have been set at the factory at one of two positions as shown in Table 2-1.

Slide the switch to the desired position to change the standard.

Table 2-1 Standard Switch Position on Shipment

SWITCH	Ref. No	POSITION
LINE INPUT LEVEL	1	L (minimum -18 dBm)
LINE OUTPUT LEVEL	2	H (+4 dBm)
MIC ATT	3	0dB

⤢ zoomFour MIC ATT slide switches beside their numbered microphone jacks 1 to 4, marked 0dB in the upper position and -20dB in the lower, with callout 3 pointing to the switches.

Figure 2-2 MIC ATT

⤢ zoomThe adjusting panel's row of trimmers and switches from REC BIAS to PEAK LEVEL, with callout 1 on the LINE INPUT LEVEL switch and callout 2 on the LINE OUTPUT LEVEL switch.

Figure 2-3 Adjusting Panel

2-5 POWER AND SIGNAL CONNECTION↑ TOP

Power, auxiliary ground, remote, and line input/output connections are made on the rear connector panel of the MX-5050 MK III-4.

Table 2-2 shows the function of each connector and component on the rear panel.

Table 2-2 Rear Connector Panel

⤢ zoomRear connector panel of the electronics unit with numbered callouts for the reproduce head, record/erase head, to-deck, and the line input and line output connectors.

Electronics

⤢ zoomRear connector panel of the transport unit with numbered callouts for the reproduce head, record/erase head, to-amp, remote control, caution label, ground terminal and power connector.

Transport

Index No.	Name	Function
1	REMOTE CONTROL connector	Used to connect optional remote control unit (CB-102).
2	LINE OUTPUT connectors	Male XLR connector with unbalanced output. Load impedance : 600 ohm or greater Level : +4 or -8 dBm at 0 VU, selectable with on-board switch Maximum output level : +21 dBm with a 600 ohm load
3	LINE INPUT connectors	Female XLR connector with unbalanced input. Input impedance : 50 kohm Minimum input : -6 dBm or -18 dBm, selectable with on-board switch.
4	GROUND terminal	Auxiliary ground connection for use with equipment not connected to a common ac ground.
5	POWER connector	Three-terminal connector for connection to ac power and ground.
6	PRODUCTION nameplate	Indicates model number, production lot number (serial number), power requirements, and place of manufacture.
7	CAUTION	Precautions for preventing fire and shock.
8	REPRODUCE HEAD connector	Male MR-type connector for reproduce signal. Connected to the Reproduce Head Cable [ZA-62X].
9	RECORD/ERASE HEAD connector	Female MR-type connector for record and erase signal. Connected to the Record/Erase Head Cable [ZA-62Y].
10	TO DECK connector	Male MR-type connector to recieve power, bias and control signal from deck. Connected to the Power Supply Cable [ZA-62Z].
11	TO AMPlifier connector	Femal MR-type connector to supply power, bias and control signal for amplifier. Connected to the Power Supply Cable [ZA-62Z]

2-5-(1) AC POWER CONNECTION↑ TOP

The MX-5050 MK Ⅲ-4 is factory set to operate at the line voltage and frequency indicated on the packing case and on the rear connector panel of the equipment. AC power is connected by means of a three-wire power cable which also provides a common ground connection. If a two-wire receptacle is used with an adaptor, be sure the adaptor is properly grounded. If a change of line voltage is desired to accommodate different power requirements, please contact your nearest Otari dealer.

2-5-(2) SIGNAL CONNECTIONS↑ TOP

Line input (female) and line output (male) connectors are XLR-type connectors. To wire the mating plugs, refer to Figure 2-4 and proceed as follows.

LINE INPUT CONNECTOR WIRING:

For unbalanced inputs using two-conductor shielded cable, wire the male XLR-connector as follows:

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

For unbalanced inputs using single-conductor shielded cable, wire the male XLR-connector as follows:

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

LINE OUTPUT CONNECTOR WIRING

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

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

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

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

⤢ zoomWiring diagrams for two XLR connectors: UNBALANCED 2 CONDUCTOR, with HIGH to pin 3, LOW to pin 2 and the shield to pin 1 jumpered to pin 2; and UNBALANCED 1 CONDUCTOR, with HIGH to pin 3 and the shield to pins 1 and 2.

UNBALANCED 2 CONDUCTOR

UNBALANCED 1 CONDUCTOR

Figure 2-4 Input/Output Assembly Connector Wiring