Panasonic sq tc 500 n service manual

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ORDER NO. AD9511200C3

Service Manual

5-Disc CD-ROM Changer CD-ROM Drive
jfiJMPACT jtfiDMPACI E 30 'I'"( >500 N
DIGITAL AUDIO
Colour
(W) : White
Area
Suffix for
Colour
Model No.
(GU) (W)
Specifications
Interface ATAPl Interface Frequency response
(40 pin connector) Line out 20 Hz - 20 kHz
Playable disc format CD-ROM SIN ratio
(mode 1 and mode 2) Line out More than 85 dB
CD-FlOM XA Temperature
(mode 2 form 1 and form 2) Operating 5 to 45'C
PHOTO CD Storage -- 20 to GO'C
(Single and multisession) Humidity
CD-DA Operating 20 to 90% Rh (Ncn~ccndensing)
Video CD Storage - 20 to 90% Rh (Non-condensing)
Data transfer rate 600 KB/s Laser
Access time Type Semiconductor lasser GaAlAs
1/3 Stroke 220 msec Typ. Wave length 780 nm
Buffer memory capacity 256 KB Source voltage DC 5 V = 5%
ERROR HATES DC 12 V t 10%
Hard read errors Less than 10 "2 Source current DC 5 V, 0.4 A
Soft read errors Less than 10 '9 DC 12 V, 2.0 A
Output level (Impedance) Dimensions (W x H x D) 146 x 41.3 x 224 mm '
Headphone 0.6 Vrms (32 £2) (5-3/4 X 1-5/8" X 8-12/16")
Line out 0.8 Vrms (50 k9) Weight 1.3 kg typ. (2.9 lb.)
AWARNING

This service inlormation is designed for experienced repair technicians only and is not designed lor use by the general public, It does not
contain warnings or cautions to advise non-techniCal individuals of potential dangers in attempting to service a product.

Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or repair
the product or products dealt with in this service information by anyone else could result in serious injury or death.

Panasonic®

© 1996 Matsushita Electric industrial Co, Ltd.
All rights reserved. Unauthorized copying
and distribution is a violation ot law.

Contents

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l Contents

Handling Precautions for Traverse Deck .........
Precaution of Laser Diode .....
Federal Communications Commission (FCC)
Rdio Frequency interference Statement.
Accessories ............
Supports Major CD-ROM Formats .
System Requirements
Operation Guide
Parts and Functions
installing the Hardware
Guide to Operation

Troubleshooting .
Operation Check and

Main Component Replacement Procedures
Schematic Diagram
Printed Circuit Board Diagram
Function oi IC Terminals.
Replacement Parts List
CabinetParts Location
Loading Unit Parts Location
Packaging 3

CAUTION:

hazardous radiation exposure.

1) The use of controls or adjustments or performance of procedures other than those specified herein may result in

2) The drive is designed to be incorporated into a computer-based system or until which has an enclosed cover.
, Your CD-FiOM drive may not be used as a stand-alone unit.

W l Handling Precautions for Traverse Deck

The laser diode in the traverse deck (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 traverse deck (optical pickup).

0 Handling of traverse deck (optical pickup)

1. Do not subject the traverse deck (optical pickup) to static electricity as
it is extremely sensitive to electrical shock.

2. To protect the laser diode against electrostatic breakdown. short the
flexible board (FFC board) with a clip or similar object.

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

4. Do not turn the variable resistor (laser power adjustment). it has al-

' ready been adjusted.

O Grounding for electrostatic breakdown prevention
1. Human body grounding
Use the anti-static wrist strap to discharge the static electricity from
your body.
2. Work table grounding
Put a conducive material (sheet) or steel sheet on the area where the
traverse deck (optical pickup) is placed. and ground the sheet.

Caution:
The static electricity of your clothes will not be grounded through the wrist

W trap. So~ take care not to let your clothes touch the traverse deck (optical

pickup).

Caution when Replacing the Traverse Deck:

FFC hoard
(Handle it carefully) Lens (0° not qu
FFC board

(Handle it carefully)

(Do not turn)

No. 6) (GND) pin No. G) (LD) pm

, Wriststrap
7" »\ (Anti-staticbracelet) /
5/

Iron plate or some metals to
conduct electricity , '

The traverse deck has a short point shorted with solder to protect the laser diode against electrostatic breakdown. Be sure to remove the solder from

the short point before making connections.

I Precaution of Laser Diode

CAUTION:
Wave lengthz7so nm

Maximum output radiation power irom pick up: 100 uWNDE

This product utilizes a laser diode with the unit turned on. invisible laser radiation is emitted from the pick up lens.

Laser radiation from the pick up unit is safety level. but be sure the followings:

1. Do not disassemble the pick up unit. since radiation from exposed laser diode is dangerous.
2. Do not adjust the variable resistor on the pick up unit It was already adjusted.

3. Do not lock at the locus lens using optical instruments
4. Recommend not to lock at pick up lens for a long time.

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