Technics SLCH 515 Service Manual

Page 1

ORDER NO, A0931282508

Service Manual

Compact Disc Changer Compact Disc Player
GOMPADT

(tree MASH. SL-CH515

mun» stout nolu mama

Colour
SB-CH717 SB-CH717
(K) ....BlackT
SL-CH515 sr-cmov Area
Remote Control
Transmilier 3:33; 1?an Area Colour
(E) Europe, Oceania
Asia. Lalin America, (K)
(GO) Middle Near East and
RS-CH505 SE-CH717 Africa
OThe photograph shows therSC:CH717 model. / System: SC-CH51 5
" SC-CH717
Because oi unique interconnecting cables,
when a component requires service, send
or bring In the entire system.
NEW TRAVERSE DECK (RAE0113Z)
Specifications
I Audio
DA converter 1 bit 2 DAC MASH
l CD Graphics tor (GC) area X
Video iormat NTSC (M (B, D, G. H, i) "N
I Pickup , Notes:
Wavelength 780 nm 1. Weight and dimensions shown are approximate.
2. Design and specifications are subject to change
I. General without notice,
Dimensions (WXHxD) 270x89><320 nm
we'ght 29 kg * MASH is a trademark oi NTT.

System Tuner/Sound Processor Compact Disc Player Amplifier Cassette Deck Speakers
"SCCH515 sT-cH505 SE-CH515A SB-CH515A
SC-CHTW ST-CH707 SL-CH515 FlS-CH505

SE-CH717 SB-CH717
'isc-cmw ST-CHSOS

Notes: for Europe area
tor Asia, Latin America. Middle Near East and Alrica area
"for Oceania
Made in PAES

Technics

Page 2

SL-CH515

lContents
lHANDLING PRECAUTIONS FOR TRAVERSE DECK OWIFIING CONNECTION DIAGRAM .
UPRECAUTION OF DIODE IMEASUREMENTS AND ADJUSTMENTS

ILOCATION OF CONTROLS .
.LISTENING TO COMPACT DISCS
IDISASSEMBLY INSTRUCTIONS

IABOUT THE SELF-DIAGNOSTIC MODE
IDISPLAY FUNCTION OF
. .. 7~I4 AUTOMATICALLY-ADJUSTED RESULTS
CHOW TO CHECK THE SERVO AND MAIN P.C.B. .NEW DIGITAL SERVO SYSTEM
'INSTALLATION OF THE LOADING COMPONENTS 16~18 OTFIOUBLESHOOTING GUIDE
.INSTALLATION OF THE TRAY BASE IWHAT IS CD GRAPHICS .....
AND THE TRAY ASSV 18 .FUNCTION OF IO TERMINALS
OBLOCK DIAGRAM ..... 19~22 .REPLACEMENT PARTS LIST .
OSCHEMATIC DIAGRAM . 23~30 OCABINET PARTS LOCATION ..
OPRINTED CIRCUIT BOARD DIAGRAM , 31 ~34 OLOADING UNIT PARTS LOCATION

NOTE:

Reier to the service manual for Model No. SE-CH515A (Order No. DA931232302) or SE-CH717 (Order No.
AD931232203) for Information on ACCESSORIES". STACKING THE COMPONENTS", "CONNECTIONS" and
PACKING".

lHandling 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 oi electrostatic breakdown during repair oi the traverse deck (optical pickup). {Darieble "95;?
0 not turn

oHand I tug of traverse deck (optical pickup) Optical pickup

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

2. To prevent the breakdown oi the laser diode. an antistatic

shorting pin is Inserted into the ilexible board (FPC board).

Lens (Do not touch)

When removing or connecting the short pin. finish the job in as FPC

short time as possible. (Handle It careiuily)
3. Take care not to apply excessive stress to the tiexibte board (FPC

board).
4. Do not turn the variable resistor (laser power adiustmenl) It has

already been adjusted. Be sure to short this portion
OGroundlng tor electrostatic breakdown (Use the shorttng pin or clip)

prevention

1. Human body grounding
Use the anti-static wrist strap to discharge the statlc electricity
lrom your body.
2. Work table grounding
Put a conductive material (sheet) or steel sheet on the area where
the traverse deck (optical pickup) is placed. and ground the sheet.
Caution:
The static electricity oi your clothes will not be grounded through the
wrist st rap. So. take care not to let your clothes touch the traverse
deck (optical pickup).

.......,

Iron plate or some metals
to conduct electricity

lPrecaution of Laser Diode

CAUTION: This product utilizes a has or diode with the unit turned "0 n", invisible laser radiation is emitted from the pick up lens.
Wave length: 780 nm
Maximum output radiation power from pick up: 100 uWNDE

Laser radiation irorn the pick up unit is eeiety level. but be sure the iollowings:

1. Do not disassemble the optical pick up unit, since radiation irom exposed laser diode to dangerous.
2. Do not adiust the variable resistor on the pickup unit. It was already adjusted.

3. Do not luck at the focus tens using optical instruments.

4. Recommend not to look at pick up lens tor a long time.

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SL-CH515

Slide plate
(2)

Slide plate
Slide plate (3)

(1)

Flg.8

13. Install slide plate (1). slide plate (2) and slide plate (3).

Drive

Slot (A)

Fig.10

16. Push slide plate (1) in the direction ul arrow ©, so that
the catch (A) in Fig.9 engages with slide plate (1).

17. Secure slide plate (1) with a screw (0).

18. Rotate the pulley gear in the direction at arrow ® so
that slot (A) oi the drive can gear is in the position
shown in Fig.10.

Fig.2
3. After sliding the tray base in the direction 01 arrow Q).
draw the tray base gradually in the direction of arrow ®.
(See Fig.2)
Slide the tray base until the tray base stops.

. Claw (A)
Slide plate (1) Fly 9

14. Press catch (A) in the direction 01 arrow @ and then
push slide (1) of the loading unit in the direction of arrow
®. (See Fig.9)

15. Install the traverse deck and the conversion lever.

(See Fig.9)

I Installation of the Tray Base
and the Tray Assy

Fig.1

1. lnstali the loading unit on the bottom board assy and
secure it with 4 screws (0~0). (See Fig.1)
2. install the tray base on the loading unit. (See Fig.1)

Tray ass'y

Acceleration
gear

Fig.3

4. Holding the tray base, install the tray ass'y on the tray
base and lead the tray ass'y slowly. (See Fig.3)

5. After engaging the acceleration gear. release the tray
base which is held and feed the tray assy. (See Fig.3)

718-