Panasonic SJHD-515, SJHD-515 Service manual

AD0003058C2

Mini Disc Deck

SPECIFICATIONS

SJ-HD515

Mechanism Unit: MR3A

Colour

(S)..........Silver Type

Area

(E)..........Europe.

1. Note

Refer to the service manual for Model No. SE-HD515MD (ORDER No. AD0003056C2) for information on Accessories and Packaging.

2. Blue LED

- The blue LED mounted to each sides of front panel is very sensitive to static electricity. When handling the LED base plate, be very careful about it.

- Do not replace the blue LED by itself because it may be subject to electrostatic breakdown or deterioration in quality. When replacing the LED base plate, be sure to replace L and R sides simultaneously to adjust the brightness. For configuration at the time of supply of replacement parts, refer to Printed Circuit Board

Diagram.

3. Before Repair

This equipment (SJ-HD515), which is a component of the system, is supplied with power from the Amplifier (SE-HD515MD) through the Tuner (ST-HD515MD). When repairing this equipment or checking operation of the system, be sure to connect to the amplifier and tuner with it. This equipment, even in the state of it as a single equipment, permits power supply and operation check. When operating it as a single equipment without the amplifier and tuner, refer to the To Supply Power Source and Signal Check .

4. Handling Precautions for MD Unit

The laser diode in the MD unit (optical pickup) may break down due to potential difference

caused by static electricity of clothes or human body. So be careful of electrostatic breakdown during repair of the MD unit (optical pickup).

4.1. Handling of MD Unit (optical pickup)

1. Do not subject the MD unit (optical pickup) to static electricity as

it is extremely sensitive to electrical shock.

2. To protect the breakdown of the laser diode, an anti-static

shorting pin is inserted into the flexible board (FPC board). Refer to Fig. 4-1.

3. Take care not to apply excessive stress to the flexible board (FPC

board).

Fig. 4-1.

4.2. Grounding for electrostatic breakdown prevention

4.2.1. Human body grounding

Use the anti-static wrist strap to discharge the static electricity from your body. Refer to Fig. 4-2.

Fig. 4-2.

4.2.2. Work table grounding

Put a conductive material (sheet) or steel sheet on the area where the MD unit (optical pickup) is placed, and ground the sheet. Refer to Fig. 4-3.

Fig. 4-3.

Caution:

The static electricity of your clothes will not be grounded through the wrist strap. So take care not to let your clothes touch the MD unit (optical pickup).

5. Precaution of Laser Diode

6. Location of Controls

7. Operation Checks and Component Replacement /

Procedures

- This section describes procedures for checking the operation of the major printed circuit boards and replacing the main

components.

- For reassembly after operation checks or replacement, reverse the respective procedures. Special reassembly procedures are described only when required.

7.1. Checking for the main P.C.B.

- Check the main P.C.B. as shown below.

7.2. Checking for the MD servo P.C.B.

7.2.1. Checking for the MD servo P.C.B. (A side)

- Follow the (Step 1) - (Step 3) of item 7.1.