Technics SLHD 505 Service Manual

Page 1

ORDER NO.AD9904111C5

Service Manual

Compact Disc Player

I WW SL-HD505
duets MASH

DIGITAL AUDIO rm My.

Rem 00W (S) .................... Silver Type
<- transmitlm ($440505

(sc-Hbsmuo) , Areas
5n noses J33 senosos PP.. ..U.S.A. and Canada.
5744:5051 a O E ...................... Europe.
SL-HD505 s. p-tzsosmo A 6 System:SC-HD505
O SC-HD505MD

©

Bicause of unique interconnecting cables, when a

i

component requires service, send or bring in the entire

1 _ e, -- ,
iransmi'ter (RS HD 0° :IEfigggiwa system.
(SC-H0505) _
Note: Refer to the servtce manual for Model NOSE-
H0505/505MD (ORDER NO.AD9904110C5/
AD9904116A2) for information on ACCESSORIES",
"INSTALLATION", "CONNECTION" and PACKAGING.
Specification
Mechanism:RAE015ZZ Mechanism Series Power Consumptlon[For (E) area only]: 10W
IAudlo Notes:
DA converter: 1 bit 2 DAC MASH 1.DeSIgn and specificatiOns are subject to change without notice.
Digital output terminal: Opticalxl 2.Dimensions and weight are approxtmate.
IPlckup ISystem
Wavelength: 780nm SC-HDSOS:
IFormat Tslner:ST-HDSOS,Compact Disc PlayerISL-HDSDfi.AmplifienSE-
Sampling frequency: 44.1. HD505.Cassette Deck:RS-HD505,Speaker5:SB-HD505(Made in
MAES )
IGeneral
SC-HDSOSMD:
Dimensions (WxHxD): 202x76x254mrn .
W _ hl' 14k Tuner:ST-HDSOSMD, Compact Dlsc PlayerzsL-HDSOS,
99 ' ' 9 Amplifig-r'SE-HDSOSMD, Minidisc DeckSJ-HDSOS .Speakersse-
Power Supply[For (E) area only]: DClaV/10V HD5OS Made in MAES.)

A WARNING

This sen/ice inlormation is designed for experienced repairtechnicians only and is not designed for use by the general public.

It does not contain warnings or cautions to advise non-technical individuals at potential dangers In attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced prolessional technicians. Any attempt to sen/ice
or repair the product or products dealt with in this service information by anyone else could result in serious injury or death.

1") 1999 Matsushita Electric Industrial Co.) Ltd. -\

0 ®
All rights reserved Unauthorized copying and
l distribution is a Violation of law.

Page 2

SL-Hnsus

CONTENTS

1 Blue LED
2 Beiore Repair ~

3 Precaution of Laser Diode .................................................... 3
4 Operating instructions .......................................................... 4
5 Handling Precautions for Traverse Deck ------------------------------ 5
5'1 Handling of traverse deck (optical plckup) 5
5.2 Grcuriiirg for electrostatic breakdown prevention ----------- 5

6 Operation Checks and Component Replacement ProceduresG

7 Error Code Display and Servo Adjustment Function ----------- 11
7.1, Error code display proc .e .................................... 11
7.2. Servo adjustment procedure ......................................... 11
7.3 Table 112
7.4. Table 2 .. ............ 12

-13

3 Measurements and Adjustments -------------------------

8-1- Power simply to This Unit alone-
8.2, To Check Signals -----------------

9 Troubleshooting Guide ............................
10 Block Diagram 15

1 Blue LED

11 Schematic Diagram Notes

11.1. Scheamtic Diagram Notes 18
11.2 Type Illustration of lC's. Transistors and Diodes ----------- 18
12 Schematic Diagram """"""""""""""""""""""""""""""""""""" 19
13 Printed Circuit Board Diagram ----------------------------------------- 24
14 Wiring Connection Diagram """"""""""""""""""""""""" 26

15 Terminal Function of IC's ----
151. IC701 (AN8839NSBE2): SERVO AMP --
15.2. IC702 (MN652790RSA1): SERVO PROCESSOR/DIGITAL
SIGNAL PROCESSOR/DIGlTAL FILTER/BAA

CONVERTER ............................................................ 27
15 3. lC703(AN8739$BE2)FOCUS COIL/TRACKING COIL/

TRAVERSE MOTOR! SPlNDLE MOTOR DRIVE-"mm" 28
15.4. |CA03(LC66358C4K97):SYSTEM CONTROL ................ 23

16 Replacement Parts List -----------------

17 Loading Mechanism Parts Location

18 Cablnet parts Location ----------------------------

. The LED mounted to each side of the front panel of this set is very sensitive to static electricity. When handling the LED base

plate, be very careful about it.

0 Do not replace a blue LED singly. It replaced singly, 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 permit the brightness adjustment.

*For configuration at the time of supply of replacement parts,refer to Printed Circuit Board Diagram.

2 Before Repair

This equipment (SL-HD505i.which is a component of this
system,is supplied with power from the amplifier (SE-
HD505/505MD) through the tuner (ST-HD505/505MD). When
repairing this equipment or checking operation of the system,
be sure to connect the amplifier and tuner with it.

This equipment, even in the slate of it as a single equipment,
permits power supply and operation check. When operating it
as a single equipment without the amplifier and tunert refer to
the paragraph of "Measurements and Adjustments.

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3 Precaution of Laser Diode

CAUTION: ACHTUNG:

This product utilizes a laser diode with the unit turned on,

invisible laser radiation is emitted from the pickup lens.

Wave |engthz780 nm

Maximum output radiation power from pickup: 100 p

WNDE

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.

CLASS 1
LASER PRODUCT

LUOKAN 1 LASERLAITE
KLASS 1 LASER APPARAT

TCAUIION!
THIS PRODUCT UTILIZES A LASER.

Dieses Produkt enthalt eine Laserdiode.

lm eingeschalteten Zustand wird unsichtbare

Leserstrahlung von der Lasen'nheit adgestrahit.

Wellenlange: 780 nm

Maximale Strahlungsleistung der Lasereinheit: 100 p

WNDE

Die Strahlungan der Lasereinheit ungetahrlich, wenn

folgende Punkte beachtet werden:

1. Die Lasereinheit nicht zerlegen, da die Strahlung an
der treigelegten Laserdiode gelahrlich ist.

2. Den werkseitig justienen Einstellregler der Lasereinhit
nicht verstellen.

3. Nicht mit optischen lnstrumenten in dle Fokussierlines
blicken.

4. Nicht Uber Iangere Zeit in die Fokussierlines blicken.

USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN
THOSE SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.

Page 12

7.3. Table 1

FL display Symplom Cause 7 l
H - 15 i when CD truly opens, it closes by ltsell. Disc tray Open" detecuon sensor fault l
H -16 . When CD [ray closes, it opens by Itsell. Disc tray "Cma-J" mam-Io" sensor lault. W
F - 15 Does notpiay, even-when V (PLAVi is pressed. - Pickur rest DC'SUJF cletechon swflch lau
F - 26 does not move even when b(PLAY) 3}de I System control or serve processor IC inut.

7.4. Table 2

FL error V Signal to check Normal volta e and wevelorm values
code Symptom Probable cause _-7 W 7- g -1
cfisplay Signal name Location PL AY STOP
W . 7- fl \ 7-., P- . r .7. 7. -
{ |C702 8 pin MDATA 1 > 0V
- . _ v ,.
i |C702 7 pm MCLK . .9:
Focus and tracking 1. Clocks X1. power supply VDD and T 3-4V
E offset adlustments reset/HST, all on IC702. . 3702 9 pin ,MLD
'01 not completed in the 3702 18 Pl lRST 3-4V 1 3-4V
specified lime period. 2. MDATA, MCLK. and MLD
signal to/from |C403. 15702 58 pin X1 IN
lC702 59 pin X2 OUT
IC702 32 pin
1. Scratches or contaminants on disc IC702 33pm TE
E»02 surface. . .
E-04 2. Focus and tracldng servo circuits. |C702 28 pin FOD 1,7V 1.7V
E-Ofi Disc play unstable, (check wavelorms, voltages, and . ' 1 7V ' 1 7V
E-DA part values.) _, ,IC702 279" _ TRD _ ' . '
E-OC 3. Spindle driver circuit. IC702 38 pin RFDET 0V 34V
E-OE 4. Optical pickup. 1 my 7
TJ 701 FlF , ., 1.0 v
Div 1 ,rN
|C702 17 pin STAT 1 3.3V 0V
1. Scratches or contaminanm on [0702 32 pin FE PM I , , 1.7V
Focus or Tracking disc surface. .. .,t
E~08 gain adlustment not 2. Focus and Tracking servo circuit. 7 7 ;,
E-OA conpleled In the (check waveforms, voltages, and [(3702 33 pin TE , l 1 7V
specified time period. PEH_V31U95-) . , ' ' l I _ , ,
. 3' 091" 90 , IC702 36pm OFI' ov 0v 1

12