Jvc KDMK 68 RF Service Manual

Page 1

KDnMKGBRF . r

JVE.

MANUAL

contents (co CHANGER SECTION)

I Safety precautions .......................... 2
I Instructions(Extracts) ....................... 3
[I] Locatlon of mam parts ................. 8
{2| Removal of main parts

I External case sections ------------------ 10

I Mechanism sections -------------------- 11

I Note When assembly .................. 3
@Maln adjustment ---------------------------- 15
ITroubieshooting chart of

CDplayer section ------------------------- 1 8

@EEE

DIGITAL AUDIO

Area Suffix

. Canada

@Descrlption of pin function ----------------- 22
Block (39mm .............................. 23
Iering connections ......................... 23
IEStandard scernatic diagram - ~ ,
Location of p.c.board parts ................ 26
IExploded view of

mechanism component parts ------------- 30
IExploded view of

enclosure component parts --------------- 32
@Packing Illustration and parts list ----------- 33

contents (CD CHANGER CONTROLLER SECTION)

I instructions (Extracts) ..
III Location of Main Parts
I FM Modulator Section.

[Z] Standard Schematic Diagram
I FM Modulator Section Circuit.
I Display Section Circuit ...........
IE] Location of P. C. Board Parts and Parts List

I Display Section ........
[2] Removal ofMain Parts and Exploded View 39 I FM Modulator Section Board ..
I Display Section ........ as l Display Section Board 47
I FM Modulator Section . 40 [E Packing ........................... Back cover
IE Main Adjustments 41
No. 49251

February 1995

Page 2

KD'MKGBRFC/J/JT

ISafety Precautions

J (USA) Only
Important for Laser Products

1. CLASS 1 LASER PRODUCT

2. DANGER: Invisible laser radiation when open and in-
terlock failed or defeated. Avoid direct exposure to beam.

3. CAUTION: Do not open the bottom cover. There are no
user serviceable parts inside the unit; leave all servicing
to qualified service personnel.

4. CAUTION: The compact disc player uses invisible laser
radiation and is equipped with safety switches which pre-
vent emission of radiation when unloading cartridge and
the safety interlocks have failed or are defeated. It is
dangerous to defeat the safety switches.

5. CAUTION: Use of controls of adjustments or perfor-
mance of procedures other than those specified herein
may result in hazardous radiation exposure.

6. CAUTION: The laser is able to function, if safety swit-
ches are out of function. The laser light is invisible, avoid
exposure, do not disassemble the laser unit, but replace
the complete unit.

B/E/G Only
Important for Laser Products

1. CLASS 1 LASER PRODUCT

2. DANGER: Invisible laser radiation when open and in»
terlock failed or defeated. Avoid direct exposure to beam.

3. CAUTION: Do not open the bottom cover. There are no
user serviceable parts inside the unit; leave all servicing
to qualified service personnel.

4. CAUTION: The compact disc player uses invisible laser
radiation and is equipped with safety switches which pre-
vent emission of radiation when unloading cartridge and
the safety interlocks have failed or are defeated. It is
dangerous to defeat the safety switches.

5. CAUTION: Use of controls of adjustments or perfor-
mance of procedures other than those specified herein
may result in hazardous radiation exposure.

ADVERSEL: Usynlig lasersuéling ved abning. nar sik-
kerhedsatbrydere er ude at lunktion. Undga
udsaettelse for stréiing.

VAROITUS: Varmuuskytkimen oliessa pois pdiiltil kun
I_aite avataan, siell§ kehittyy nikymiitdbta laserséteila.
Ali pane itseisi sateilyn oltiiksi.

VARNING: Osynlig laserstaining uppstér vid korn-

Identlflcatlon And Certification Labels

NAME/RATING PLATE

0

Bottom panel at the unit

'1

Notes

1 The date of manufacture.

2 The ID code of manufacturing plant
'3 Marking of country origin.

Position And Reproduction Of Labels
Bottom panel of the unit

W-
7i:

ng Plate

CLASS
LASER

l
PRODUCT

Obs:

Apparaten innehaner laser-
komponent av Mare laserklass
3n kiass 1.

Top panel ol the unit
Gerateoberseite
Pannaau superieur as I'apparsil

ponentens dppning nir sakerhetsbrytaren a:
frbnslagen.

ADVARSEL: Usynling laserstraling ved apning nar sik-
kerhetsbryteren er ude at funktion Unnga utsettelse

DANGERIMSINIIIW WMW- szmllw- VAMWIMHIM
Mammogram mllt-pveaihdng,riar strllniim n51 mm dol jawu'tusnlilmuld
momma Warns iwmma Ililllrll Mllymlltbmille
Wm dimwm mowed. 34mm Di mewilnkam

('1 «mm, (a) «at m M m

for smiling.

2 (No. 49251)

Page 22

I Signal Processing Section

N0 . NO Check for defects by
Is sound heard from both Neither channel -
comparing L and R
L and R channels? produces sound channels
(YES YES
NO Check audio power
Normal ls1DV produced at -
- supply section 0391 and
3019'" 87 its vicinity
ivzs
3 Is audio output (including 0
' samp ing output compo- N
nents) produced at (C151 ChggJflagwand
pins (1) and (7) during
play?
(was
Is audio output produced NO

at IC301 pins (1) and (7)
during play?

Check the mute circuits

Fig. 4-7

Check IC151 and
its vicinity

KD-MK68RFc/mr