Jvc XVD 2000 BK Service Manual

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XV-DZOOOBK

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Contents
Safety Precautions ............. . . 1.2 Troubleshooting ------- j ----------- .l. --------- 2-52
Instruction Book ................ . . 1_4_33 Servo Slgnal Waveform InEach Condltlon ------- 2-70
Description of Major ICS _________ . . 24 Block Dlafgrafns .............................. 2-77
Internal Connection of FL Display- - - - - - - - -2-39 Sehematrc Dragram """" ' ' ' ' """" 273
precautions for Service ...................... 240 Pnnted Clrcult Boards ------------------- 2-82

............ 2.41 PartsList.........................-......... 3.1.17
Adjustment Procedures ---------------------- 2-48

COPYRIGHT © 1997 VICTOR COMPANY OF JAPAN, LTD. No.20651

DES. 1997

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-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
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.

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 areturn 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 1,5009 10W resistor paralleled by
a 0.15uF AC-type capacitor between an exposed

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

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

part, particularly any exposed metal part having a 0.15): ACTYPE

return path to the chassis, and meausre the AC .
voltage across the resistor. Now, reverse the plug in -II- Egg: :3?
the AC outlet and repeat each measurement. voltage W); 5 each exposed
measured Any must not exceed 0.75 V AC (r.m.s.). 15009 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. It is essential that safety critical components are replaced by approved parts.

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

Q)

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Troubleshooting
1.Power-on processing W

F001
(500m fuse
is blown

' .STAND-B
indicating lamp
lights up?

Replace I Return to ®
F001. and recheek.

Does
the lamp
goes out when
POWER switch of

Volume remote 00111101
Press POWER switch C wnv Cl'leclgthe
Voltage of supphed m between

T901'12" h) 15" D902 or

10901" 1" at

YES
7 (transformer) transformer
Check 5343 ~ 00 IC901"E"
(power switch) NO STANDBY N0
33:32? indicating lamp ¢
, t? R t to
goes 0 Check the soldered infill?
part of the yin! of
YES T901 (transformer)
and the thermal fuse
9 between "5" and 6".
Return to ®
Power-an Voltage n N0 and recheck,
. of 10901 3
procesamg as OK. at 5 V?
15 10901 Replace
. Current
to Power Supply ' N0 oltage applied at em: to hot? 10901.
Volume lead Micro-
fFL? computer
Volume Return to @
and recheck

NO Correct voltage
nggjmlv appliedtoICSS] Continuity R . the
(FL driver)? 0K between 1c9o1l'3" .3?"
and Icsums"? mg
YES l
Return on ®
Check No Osdllating .1. M' t 1 recheck-
:Tmfizg 4- 108513044 wave outputfrom ° 333? e
n 5 ° ' and 0884. IC831"20"?
YES
, Voltage
Is connectmn NO 0(10831'13"

between 1083 1"20"
- d 10601"5" O V

NO

oltage
of CN831"19
at +6V?

YES
R law 10831,
2" YES
To Microcomputer Volume.

' NO
To Mmmcompuve NO

Volume.

Is connection
ofIC831"14"-"15" and
(1601"2" to "4" 0

Repair the Return lo®
wiring and recheck.

Return to ®
and recheck:

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XV-DZOOOBK

CDDuring normal playback operation (TEST mode is OK)

(1) Is TOC reading normal? NO
Displays total time _-> Because TEST mode is OK, CLV control must be available.
for CD'DA- Does pulse frequently occur on IC354"18" during
Shifts to double-speed TOC reading?
mode for VCD- If occurs, 10354 is defective.
Check that signal from IC354"36" (SUBQ), "37" (SQCK)
YES and "47" (STAT) is correctly input to 10351.
NO
(2) Playback possible? -'> * --:-- is displayed during FL search.
According to [* Cannot search] for DVD, check the feed
and tracking systems.
* No sound is output although the time is displayed.(CD-DA)
DAC, eta, other than servo.
* The passage of time is not stable, or picture is
abnormal.(V-CD)
Jitter measurement or error rate measurement.
-> With IC354"17" (FIAG) connected to a frequency counter,
play back the let program of CTS-1000 on a 1-second
gate. OK when the indication of the counter is 10 to 20.
If the indication is 50 to 100, the mechanical unit may
be defective.
(Counter indication must be 7.35kHz during stop.)
-> When error rate is OK, fine flaws are probably the
cause.
Check that signal is input from IC301"61" to IC35461" (DO).
'F When above check is OK, some system other than the servo
seems to be defective.
(3) Others

Error frequently occurs in the middle to outer part of V-CD (even with discs containing no flaws).
Check the waveform of TE.
-> Does 700 to 900Hz wave exist?
(This problem depends on the disc combination. If this claim arises, borrow the problem
disc.)
-> Caused by resonance of mechanical unit. Replace the mechanical unit.

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Page 146

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