Jvc TDV 661 TN Service Manual

Page 1

TD - VSGZBK AIB/E/EN/G/UMT
TD ~ V681TN C/J

JVB

SERVICE MANUAL

T D- V662 B K A/B/E/EN/G/U/UT
TD-V661 TN cu

Phil I'll"!
\o n

Area Suffix
Australia
.......... U K.
C ...................... Canada
Conflnental Europe
North Europe

Contents

I Safety Precautlons --------------------- Pagez [ELStanderd Schematic Diagram --------------- 25
. Features/Speculations ------------------------ 4 [Location of P.c.Board parts

I .nstwcuomgnmflon) ......................... 5 and pans Us! ..................... 23
[flLocatlon of Maln Parts ' , 5 . e - ' > = 13 ..Exploded Vlew of Enclosure Component Parts
@RemovalofMalnParts .......................... 14 andpansUs:..........A.,e.,.,=,.:,36
[E] .Maln Adlustment --------------------------- 19 ELExploded View of Mechanism Component Parts
[2].eran Connections ............................ 24 and pans Llst ..................... 38
ELBlock Diagram """""""""""""""""""""""" 25 Eflfiacklng lllusraxlon and Parts Ust ------------- 41

No.4348
April 1993

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I Safety Precautios

I 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

. Alterations ol the de5ign 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.

. Many electrical and mechanical parts in the product have special satety - related characteristics. These characteristics are often

not evident from visual inspection nor can the protection alforded by them necessarily be obtained by using replacement
components rated tor higher voltage. wattage. etc. Replacement parts which have these special satiety characteristics are identified
in the parts list of service manual. Electrical components having such leatures are ldentilied by shading and( A ion 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 of service manual may create shock. fire. or

other hazards.

, The leads in the products are routed and dressed with ties. clamps . tuhfngs. barriers and the like to be separated from live parts.

high temperature parts. moving parts and or sharp edges tor the prevention of electric shock and lire hazard. When service is
required. the original lead routing and dress should be observed. and it should be conlirmec that they have been returned to normal.

after reassemblizig.

. Leakage current check (Electrical shock hazard testing)

Alter re , assembling the product. always perform an isolation check on the exposed metal parts oi the product (antenna

terminals. knobs. metal cabinet. screw heads. headphone iack. 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 lrom each exposed
metal part oi the cabinet. particulary any exposed metal part having a return patii to the chassis. to a known good eanh ground

Any leakage current must not exposeed O SniA Ai3(r.m.s.) AC VOLTMETER
. Alternate check method ( lHaving 1000 chms/vclt,

0' more sensitivitytl
Plug the AC lirie cord directly into the AC outlet. Use an AC

voltmeter haying LOGO ohms per volt or more sensitivity in the

0.15mi: AC TYPE
lcllcwing manner. Connect a 1.500 ohms 10W resistor paralleled by F,

Place this probe
-o on each exposed
a known good earth ground. Measure the AC voltage across the 1500 52 10W me(al part.

a O 15 [1 F AC type oapacuor between an exposed metal part and

. I n . . .
re5istor Wltli the AC volt ieter Move the reststor connection to each Good earth 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 ms] This corresponds to 0.5mA ACtr.m.s.).

0 Warning

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 rnaintaintained.
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.

2 (No.4348)