Jvc FS 6000 Service Manual

Page 1

FS-5000/FS-6000

Area Suffix

J .......... The U.S.A
& Canada

Contents

Safety Precautions .............................................. 1-2
importance Admistering point on the safety
Important for Laser Products
Instructions (For FS-SOOO) .......
Description of Major |Cs ................
Internal connections of FL Display .
Removal of Main parts ......................
Main Adjustment ................................................. 2-18
Flow of Functional Operation

Until TOC read ................. 2-22

[filfigé

DIGITAL AUDIO

Maintenance of Laser Pickup ......
Replacement of Laser Pickup ..
Self diagnosis Function of CD .
Block Diagrams ...........
Schematic Diagrams ..
Printed Circuit Boards .
Parts List ........................

COPYRIGHT © 1998 VICTOR COMPANY OF JAPAN, LTD

No.20713
Jul. 1998

Page 2

FS-5000lFS-6000
--Safety Precautions

1.This 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.

2.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 manufacturers ;
warranty and will further relieve the manufacture of responsibility for personal injury or property i
damage resulting therefrom.

3. 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 (A) on the Parts List in the Service Manual. The use of a
substitute replacement 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.

4. 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.

5, 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, control
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.

.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 areturn path to the chassis, to a known good earth ground. Any leakage
current must not exceed 0.5mA AC (r.m.s.)

.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 1,5009 10W resistor paralleled by
a0.15;z FAC-type capacitor between an exposed

metal part and a known good earth ground. GringgihgoEol-ER
Measure the AC voltage across the resistor with the 7 ohms/volts,

AC voltmeter. or more sensitivity)
Move the resistor connection to each exposed metal ° °

part, particularly any exposed metal part having a 0.15IJF ACTYPE

return path to the chassis, and measure the AC .
voltage across the resistor. Now reverse the plug in l -_II- :33: as a
the AC outlet and repeat each measurement voltage er ' seam exmsed
measured any must not exceed 0.75 V AC (r.m.s.). 150052 10W metal part.

This corresponds to 0.5 mA AC (r.m.s.).
Good earth ground

|- Warning
1.This equipment has been designed and manufactured to meet international safety standards.

2. It is the legal responsibility of the repairer to ensure that these safety standards are maintained.

3. Repairs must be made in accordance with the relevant safety standards.

4.lt is essential that safety critical components are replaced by approved parts. 5

5. If mains voltage selector is provided, check setting for local voltage.

ACAUTION Burrs formed during molding may be left over on some parts of the chassis. Therefore,
pay attention to such bun's in the case of preforming repair of this system.

1-2

Page 29

IRemoving the CD servo control P.C.Board

1.Remove the CD mechanism assembly.

2.Remove the four screws l on the CD servo control
P.C.Board.

3.Disconnect the card wire from CN601 on the CD
servo control P.C.Board.

4.Disconnect the connector from P011 on the Motor
P.C.Board.

IRemoving the CD Traverse mechanism assembly

1.Remove the CD mechanism assembly.

2.Remove the CD servo control P.C.Board.

3.Flemove the four screws J retaining the mechanism
bracket from CD mechanism assembly.

IRemoving the CD motor drive P.C.Board

1.Flemove the CD mechanism assembly.
2.Remove the CD servo control P.C.Board.
3.Flemove the CD traverse mechanism assembly.
4.Disconnect the loading belt.

*At this time, the grease of the gear must not
place to the loading belt.

5.Ftemove two screws K retaining the loading motor
from CD mechanism assembly.

FS-5000/FS-6000

CD Mechanism
assembly

CD Servo control
P.CBoard ->

Fig. 9 CD Traverse mechanism

assembly

Mechanism
bracket

a
C D Trave rse i

mechanism
assembly

Loading motor

Loading
K belt
Fig. 10

2-1 5

Page 37

Maintenance of Laser Pickup

(1) Cleaning the pick up lens
Before you replace the pick up, please try to
clean the lens with a alcohol soaked cotton
swab.

(2) Life of the laser diode (Fig.1)
When the life of the laser diode has expired,
the following symptoms wil appear.
(1) The level of RF output (EFM output:ampli
tude of eye pattern) will below.

Is RF output N0
l.1i0.15Vp-p? Replace It.
YES
OK
(Fig.1)

(3) Semi-fixed resistor on the APC PC board
The semi-fixed resistor on the APC printed
circuit board which is attached to the pickup
is used to adjust the laser power.Since this
adjustment should be performed to match the
characteristics of the whole optical block,
do not touch the semi-fixed resistor.

If the laser power is lower than the specified
value,the laser diode is almost worn out, and

the laser pickup should be replaced.

It the semi-fixed resistor is adjusted while

the pickup is functioning normally,the laser

pickup may be damaged due to excessive current.

FS-5000/FS-6000

Replacement of Laser Pickup

Turn off the power switch and,disconnect the
power cord from the ac outlet.

V

Replace the pickup with a normal one.(Refer
to Pickup Removal" on the previous page)

V

Plug the power cord in,and turn the power on.
At this time,check that the laser emits for
about aseconds and the objective lens moves
up and down.

Note: Do not observe the laser beam directly.

l

Play a disc.

<---
Y

Check the eye-pattern at TP602.

1
Finish.

2-23