Jvc TDW 118 BK Service Manual

Page 1

TD'W11BBKENC/EN/Gr'J/UUE

Area Suffix

U.K,
Canada
North Europe
.Germany

USA.
.Other Areas
.. Hong Kong

Contents
I Safety Precautions ..................................................... 2 8 Location of RC. Board Parts and Parts List .......... 21
I Instructions ................................................................. 4 9 Exploded View of Enclosure Component Parts
1 Location of Main Parts. and Parts List ...................... ..24
2 Removal of Main Parts . 10 Exploded Wew of Mechanism Component Parts
3 Main Adjustment ....................................................... 12 and Parts List .................................................. 26
4 Wiring Connections .. 11 Packing Illustration and parts list ........................... 28
5 Block Diagram
6 IC Block Diagrams ..
7 Standard Schematic Diagrams ................................ 20
No 4360

Janan 1996

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TD'w1183KB/C/EN/G/J/U/lfl

I Safety Precautios

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 parts
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 ol the product should not be made. Any design alterations of the product should not be made.
Any design alterations or additions will void the manulactures warranty and will further relieve the manufacture of responsibiiity for
personal injury or property damage resulting therefrom.

3. Many electrical and mechanical parts in the product have special safety - related characteristics. These characteristics are often
not evident from visual inspection nor can the protection aflorded 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 and( A )on the schematic
diagram 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 part shown in the parts list at 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 reassembling.

5. Leakage current check (Electrical shock hazard testing)

Alter 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 aLeakage current tester". measure the leakage current from each exposed
metal pan of the cabinet. particulary any exposed metal part having a return path to the chassis. to a known good earth ground

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

- Alternate check method EB (Having 1000 ohms/volt,
or more sensitivity.)
Plug the AC line cord directly into the AC outlet. Use an A0

a t

-I
0.15uF AC TYPE

voltmeter having 1.000 ohms per volt or more sensitivity in the
following manner. Connect a 1.500 ohms 10W resistor paralleled by

a 0,15 11 F AC type capacitor between an exposed metal part and Place this probe
w on each exposed
a known good earth ground. Measure the AC voltage across the 1500 n 10W metal part.

resrstor With the AC voltmeter. Move the reststor connection to each Good rm ground
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.).

0 Warning (UK only)

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 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 lor local voltage.

2 (No. 4360)