Jvc XV 501 BK Service Manual

Page 1

XV-501 BK

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SERVICE MANUAL

XV-501 BK

Area Suffix
1U ------- U.S Military

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Contents
Safety precautions ............................. 1-2 Troubleshooting ................................. 2-39
Important for laser PTOdUCIS -------------- 1'3 Check points for earch error .............. 2-45
Preventing static electricity ...... 1-4 Main adjustment ................................ 2-50
Instructions ...................... 1-6~31 Block diagrams .................................. 2-53
Description of major le .................... 2-1 Standard schematic diagrams __ 2-58

Internal connection of FL display ....... 2-25 Printed circuit boards

Precautions for service ...................... 2-27 Parts list .............................................. 3-1 ~14
Removal of main parts ...................... 2-28
This service manual is made from 100% recycledpaper. "0.20822

COPYRIGHT© 2000 vroron COMPANY OF JAPAN, LTD.
Feb. 2000

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XV-501 B K

-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.A|terations 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 (AX) 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 current 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 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 1,5009 10W resistor paralleled by
a 0.15u F AC-type capacitor between an exposed

metal part and a known good earth ground. E fivéSg-EMOEJER
Measure the AC voltage across the resistor with the ohms/volts,
AC voltmeter. or more sensitivity)
Move the resistor connection to each exposed metal
part, particularly any exposed metal part having a 0.15/JF AC TYPE
return path to the chassis, and measure the AC n .

. . ll Place this
voltage across the reSIStor. Now reverse the plug In probe on
the AC outlet and repeat each measurement voltage WV ' '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

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

A CAU110N Burrs formed during molding may be left overcn some pints of the chassis. Therefore,
pay attention to such bum in the case of preformlng repair of this system.

Page 67

I Removing the Traverse Unit (See Fig.6)
1. Remove the disc tray.

2. Loosen the tour screws @ attaching the traverse unit,
and remove them together with the chassis stoppers/
chassis holders.

3. Lift the rear part of the traverse unit (the leaf spring side),
then remove the unit slowly while paying attention to the
part connected to the rotary cam.

I Removing the Pickup Control Board
(See Fig.7 and 8)

1. Remove the traverse unit.

2. Remove the two screws @ attaching the pickup control
board on the bottom oi the traverse unit.

Caution: Solder the pattern on the flexible harness to
prevent static electricity damage to the laser
diode. After reassembling, unsolder the pattern;

3. Disconnect the harness from connector FPOOO1 on the
pickup control board, and card wire from connector
FPOOOS, the harnesses from P0004 and P0005
respectively (To disconnect FP0001, open the look as
shown in Fig.8.).

I Removing the Chassis Flame
(See Fig.7)

1. Remove the traverse unit.
2. Remove the pickup control board.

3. Remove the three screws (9 attaching the chassis flame
and the damper.

XV-501 BK

Rotation supporting I
eat spring
3 /
Q) r 1m , 2
Traverse unit L J
\
Chassis stopper/ .
Chassis holder I Chassts stopper/
Chassis holder
2 -
O ,. . 2
0
Rotary cam Connecting part
Fig.6
Soldering
Pickup oontrol
®_ board
FPO 1
00 \ P0005
FP0003 P0004
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FP0001

Fig.8

2-35

Page 113

XV-501 BK

PARTS LIST

[ xv-5o1 BK ]

" A" printed circuit boards and its assemblies are not available as service parts.

Area suffix E
1U .............. u.s Military E
- Contents -
Exploded view of general assembly and parts "St ---------------------------------- 32
DVD mechanism assembly and parts "St ------------------- n 3.4
E|ectrical parts list """"""""""""""""""""""""" M 3-5
Packing materials and accessories parts "St ---------------------------------------------- 3-14

3-1