Panasonic sl sw 850 service manual

Page 2

A WARNING

This service information is designed for experienced repair technicians only and is not designed for use by the general public.
It does not contain warnings or cautions to advise non-technical in
Products powered by electricity should be serviced or repaired only by experienced protessional technicians. Any attempt to service

dividuals of potential dangers in attempting to service a product.

or repair the product or products dealt wrth in this service information by anyone else could result in serious injury or death.

CONTENTS

Page
1 Precaution of Laser Diode ...................................................... 2
2 Accessories ---------------------------------------------------------------------------- 3

3 Operating Instructions ----------------------------- -- 3

4 Handling Precautions for Traverse Deck- --4
4.1. Handling the traverse deck (optical pickup) ..................... 4
4.2. Grounding for electrostatic breakdown prevention ............ 4

5 Operation Checks and Component Replacement ProceduresS
6 Checking the Operation Problems on the Traverse Deck

(Optical Pickup) ---------------------------------------------------------------------- 9
7 Automatic Adjustment Results Display Function (Self-check
Function) -------------------------------------------------------- 10

7.1. How to display automatic adjustment results ----------------- 10
7.2. Display of automatic adjustment results(seIf-check
10

function) ---------------------------

8 Measurements and Adjustments ~-

81. POWER SUPPLY VOLTAGE ADJUSTMENT ................ 12
8-2. CHECK OF PLAY OPERATION ----------------------------------- 12

9 Outline of 40-Second Sound Keeper Technique Used for
Preventlon of Sound from Sklpping ..................................... 12
91. Conventional Shockprcoflng Technique ------------------------- 12

1 Precaution of Laser Diode

CAUTION:

This product utilizes a laser diode with the unit turned on",
invisible laser radiation ls emitted from the pickup lens.

Wave length: 780 nm
Maximum output radiation power from pickup: 100 uWNDE

Laser radiation from the pickup lens is safety level, but be
sure the followings:

1. Do not disassemble the optical pickup unit, since
radiation from exposed laser diode is dangerous.

2. Do not adjust the variable resistor on the pickup unit. It
was already adjusted.

3. Do not look at the focus lens using optical instruments.

4. Recommend not to look at pickup lens for a long time.
ACHTUNG:

Dieses Produkt enthalt eine Laserdiode. lm eingeschalteten

9.2. Compression-shockproofing [Outline]
10 Schematic Diagram Note"-

10.1. Schematic Diagram Notes
10.2. Type Illustration of IC's, Transistors and Diodes--
11 Schematic Diagram ---------------------------------------------------
12 Printed Circuit Board and Wiring Connection Diagram
13 Block Diagram ---------------------------------------------------------------------- 22
14 Terminal Function of Ics ------------------------
14.1. IC101(AN8839NSBE1):SERVO AMP
14.21 |0301(SC440324CFU):SYSTEM CONTROL / LCD DRIVE
................................................................................... 26
14.3. |C401(BH6522FVE2)1COIL & MOTOR DRIVE
14.4. IC402(BA6966FVE2):MOTOR DRIVE
14.5. lC11(RS10003E2)1DC/DC CONVERTER ---------------------- 27
14.6, l0501(MN662782RPT1):SERVO PROCESSOR I DIGITAL
SIGNAL PROCESSOR / DIGITAL FILTER & D/A
CONVERTER--- ----------------------------------------------------- 28
15 Replacement Parts List --------------------------------------------------------- 29
16 Cabinet Farts Location -----------
17 Packaging -------------------------------

Zustand wlrd
Lasereinhelt

unsichtbare Lesarstrahlung von der

abgestrahlt.
Wellenlage: 780 nm
Maximale
uWNDE
Die Strahlung an der Lasereinheit ist ungefahrlich. wenn
tolgende Punkte beachtet werden:

Strahlungsleistung der Lasereinheit: 100

1. Die Lasereinheit nicht zerlegen, da die Strahlung an der
freigelegten Laserdiode gefahrlich ist.

2. Den werkseitig justierten Einstellregler der Lasereinhit
nicht verstellen.

3. Nicht mit optischen Instrumenten in die Fokussierlines
blicken.

4. Nicht uber tangere Zelt in die Fokussierlines blicken.