Jvc TDW 5 TH Service Manual

Page 1

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Germany
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UT - -------- Taiwan
Contents
..Saiety precautions ...................................... Page 2 7.Standerd schematic diagram ............................. 27
..Instructions ............................................................ 4 8.Location of P. C. board and parts List .............. 30
1.Location of main parts... 10 9.Exploded view oi Enclosure Component Parts
2.Removai of main parts .......................................... 11 and Parts List.. .38
3.Main adjustment .................................................... 16 10.Expioded view of Mechanism Component Parts
4.Wireing Connections ............................................ 22 and Parts List ..................................... 40
5.Biock diagram ....................................................... 23 11.Packing Illustration and Parts Lis .................... 41
6M: Block diagram ................................................... 24
No. 4364

JUNE 1997

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TD-WSTH WHEN/GIJ/U/UT

I Safety Precautions

1. The design 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 pans
must be identical to those used in the original circuits. Service 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 manufactures warranty and will further relieve the manufacture of responsibility
for personal injury or property damage resulting therefrom.

3, Many electrical and mechanical pans in the product 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 pans which have these special safety characteristics are
identified in the parts list of service manual, Electrical components having such features are identified by shadingm) and (A)
on the schematic diagram and parts list in the service manual. The use of a substitute replacement which does not have the same
safety characteristics as the recommended replacement part 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 . lubings. barriers and the like to be separated from live parts.
high temperature parts. mpving 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 reassembling.

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

Ac VOLTM ETER
transformer during this check. EB (Having 1000 ohms/volt,
- Plug the AC line cord directly into the AC outlet. using a"Leakage or more sensitivity.)

current tester". measure the leakage current from each exposed L-D-
0.15 l-lF AC TYPE

metal part of the cabinet, particulary any exposed metal part

i__
having a return path to the chassis. to a known good earth ground. Place this probe
on each exposed
1500 n to W metal part.

Any leakage current must not exposeed 0.5mA AC(r.m.s.)

r 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 1.500 ohms 10W resistor paralleled

Good earth ground

by a 0.15 [I F AC type capacitor between an exposed metal part and a known good earth ground. Measure the AC voltage
across the resistor with the AC voltmeter. Move the resistor connection to each exposed metal part. particularly any exposed
metal part having a return path to the chassis. and measure the AC voltage across the resistor. Now. reverse the plug in the AC
outlet and repeat each measurement. Any voltage measured must not exceed 0.75V AC(r.m.s.).This corresponds to 0.5mA
AC(r.m.s.).

\,/

6 Warning (UK only)

t. 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 maintaintained.
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.