Jvc CAMX 30 BK Service Manual

Page 1

CA MX3OBK

JVB
SERVICE MANUAL

MODELNQCA-MX3OBK

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DIGITAL AUDIO

Contents
Page Page
safejy Precautions ................................................ 1 2 Adjustment Procedures (CD) ................................. 1.47
Important for Laser Products -------------------------------- 1- 3 Maintenance of Laser Pickup ------------------------------ 1-48
Instruction Book Replacement of Laser Pickup ------------------------------ 1-48
Description of Major LSls Flow of Functional Operation Until TOC is Read ----- 1-49
Internal Block of Other ICs -1-32 Troubleshooting ----------------------------------------------- 1-50

Internal Connections of the FL Display Tube -1-34
Disassembly Procedures ........................................ 1-37

Schematic Diagrams ~~~~~~~~~~~~~~~~ Insertion

Examples of electric check method -------------------- 1-41 Printed Circuit Boards ----------------- «~lnsertion
Application Points for Grease Block Diagrams ------------------------------------------- Insertion
(CD mechanism Ass'y) .......................... 1-42 Connection Diagrams ....................................... Insertion
Adjustment Procedures (Cassette Deck) -l-43 Parts List ---------- ~ ---------------- Separate-volume Insertion
Adjustment Procedures (Tuner)- ~1e46

No.20237

Mar. 1991

Page 2

CA-MXSOBK l

-$afety Precautions

1. The design of this product contains special hardware and many circuits and components

specially for safety purposes. For continued protection, no changes should be made to the
original design unless authorized in writing by the manufacturer. Replacement parts must
be identical to those used in the original circuits, Services should be performed by
qualified personnel only.

.Alterations of the design or circuitry of the product should not be made. Any design

alterations of the product should not be made. Any design alterations or additions will
void the manufacturer's warranty and will further relieve the manufacture of responsibility
for personal injury or property damage resulting therefrom.

.Many electrical and mechanical parts in the products have special safety-related

characteristics. These characteristics are often not evident from visual inspection nor can
the protection afforded by them necessarily be obtained by using replacement components
rated for higher voltage, wattage, etc. Replacement parts which have these special safety
characteristics are identified in the Parts List of Service Manual. Electrical components
having such features are identified by shading on the schematics and by (Al) on the Parts
List in the Service Manual. The use of a substitute repalcement which does not have the
same safety characteristics as the recommended replacement parts shown in the Parts List of
Service Manual may create shock, fire, or other hazards.

.The leads in the products are routed and dressed with ties, clamps, tubings, barriers and

the like to be separated from live parts, high temperature parts, moving parts and/or sharp
edges for the prevention of electric shock and fire hazard. When service is required, the
original lead routing and dress should be observed, and it should be confirmed that they
have been returned to normal, after re-assembling.

. Leakage currnet check (Electrical shock hazard testing)

After re-assembling the product, always perform an isolation check on the exposed metal
parts of the product (antenna terminals, knobs, metal cabinet, screw heads, headphone jack,
contorl shafts, etc.) to be sure the product is safe to operate without danger of electrical
shock.

Do not use a line isolation transformer during this check.

0 Plug the AC line cord directly into the AC outlet. Using a "Leakage Current Tester",
measure the leakage current from each exposed metal parts of the cabinet, particularly
any exposed metal part having a return path to the chassis, to a known good earth
ground. Any leakage current must not exceed 0.5mA AC (r.m.s.).

0 Alternate check method
Plug the AC line cord directly into the AC outlet. Use an AC voltmeter having, 1,000
ohms per volt or more sensitivity in the following manner. Connect a 1,5000 10 W
resistor paralleled by a 0.15 [1F AC-type capacitor between an exposed metal part and a
known good earth ground.

J:

Measure the AC voltage across the resistor eigiiiggI-nggfl
with the AC voltmeter. E ohms/volts, _
Move the resistor connection to each exposed °_ 0' more 59"5"'V'W-)
metal part, particularly any exposed metal part
having a return path to the chassis, and 0,15,,FACTYPE
meausre the AC voltage across the resistor. -||-
Now, reverse the plug in the AC outlet and PI: this
repeat each measurement. Any voltage W >:;2h°e3305ed
measured must not exceed 0.75VAC (r.m.s.). 150°91°W metal part.
This corresponds to 0.5 mA AC (r.m.s.). Good earth ground

--Warning

. This equipment has been designed and manufactured to meet international safety standards.
. It is the legal responsibility of the repairer to ensure that these safety standards are

maintained.

. Repairs must be made in accordance with the relevant safety standards.
. It is essential that safety critical components are replaced by approved parts.
. lf mains voltage selector is provided, check setting for local voltage.

12 (Na20237)

Page 19

CA-MXSOBK

Using the Remote Controller

|'|'|
Remote Controller Buttons g
E
r (D
A Function Button(s) To Use I
W n Turn power on or ofl ................
B El
c IE E E I3 Amplifier
W
B E m E] Adjust volume level ................. . l3
W ED Lower volume level gradually to 0 . El
gmm - D Listen to Broadcast .................. fi
E E E IE Listen to a VCR or another component fl
Wm
. mm W
a E] El Listen to Record ............... |:|
55 FADE MUTlNG Lower volume level gradually .................. E
El [El El W
E {leEl El El CD Player
.
l
E E1935 Playa co
JVI: mew 3 maybe ° a CD
. Select CD mode
Select track number
Scanning music ..
Check program contents

Change a program
Program playback order

E Tape Deck

Play a tape in tonnard direction .....
Play a tape in B deck in reverse direction
Stop playback in B deck temporarily .
Stop playback.
Fast forwarding or Fast rewtndlng .

Operating the Remote Controller

You can use the Remote Controller to operate the CA-anoBK

without leaving your chair.
You can use it up to a distance of 23 feet.

Point the Remote Controller at the remote sensor on the
Amplifier.

Installing Batteries

. Remove the battery compartment lid,
Press the lid and slide It in the direction of the arrow.

. Insert the batteries.
Use two AAA/UMr4/R03 size batteries. Make surethe + and
- polarities on the batteries and compartment are the same

. Attach the lid.
Press the lid and slide it in the direction of the arrow.

' Note: Batteries installed incorrectly may burst or leak. Pay

attention to the tollowing:

- When the Remote Controller is not in use fora long period
of time. remove the batteries.

- Do not mix old and new batteries.

- Do not mix batteries of different types, even if their shapes
are the same.

- When batteries become weak, the operating distance of the
Remote Controller is greatly reduced and you will need to
replace the batteries.

Search tor beginning of next track while in tonnard
direction
Search tor beginning oi next track while B deck is in
reverse direction
Search for beginning oi current track while in iorward
direction
Search tor beginning of current track while B deck is in
reverse direction
Recording in torward direction
Recording with B deck in reverse direction .
Pausrng recording
Restarting recording in forward direction.
Restarting recording in reverse direction.
Stopping recording
Recording from CD in the Programmed-Edit mode ........... [:1

E--,

Note: Where + ' is indicated, press and hold the first button illustrated,
then press the second.

Tuner

First select TUNER mode ..............
Selecting a preset station ..............

(No.20237)i*19