Jvc A X611BK Service Manual

Page 1

Contents

Page Page
Safety Precautions. 1-2 Block Diagram ......................... .t 142
Warning ................ 1-2 Internal Block Diagrams of ICs. t 1-13
Specifications 1-3 Connection Diagram a. 1714
Instruction Book 1-4 Schematic Diagramsi. . Insertion
Removal Procedures 1-10 Printed Circuit Boards, Insertion
Adjustment Procedures ............................................... 11 1 Parts List ................................ Separate Volume Insertion

No. 201 14

May. 1989

Page 2

1

rSafety Precautions

. The design of this product contains special hardware and may 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 per-
formed by qualified personnel only.

. 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 manufacturer of responsibility for personal iniury or property damage resulting therefrom.

. 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 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 l A l on the Parts List in the Service Manual. The use of a sub-
stitute 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, 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-asembling.

Leakage current check (Electrical shock hazard testing)

After reasembling the product, always perform an isolation check on the exposed metal pans of 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.

00 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 part of the cabinet, particularly any exposed metal part having a return path to the
chasis, to a known good earth ground. Any leakage current must not exceed 0.5 mA 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 sensi-
tivity in the following manner. Connect a 1,500 0 low resistor paralleled by a 0.15 pF AC-type capacitor be-
tween an exposed metal part and a known good earth ground.

Measure the AC voltage across the resistor with the AC VOLTMETER
AC voltmeter E (Having 1000 ohms/volt,

.' . or more sensitivity.)
Move the resistor connection to each exposed metal
part, particularly any exposed metal part having a _L._:I_
return path to the chassis, and measure the AC volt- 5 c W"

. . ,-

age across the resistor. Now, reverse the plug in the ' PI. mi, pm!
AC outlet and repeat each measurement. Any voltage w on ch exposed
measured must not exceed 0.75 VAC (r.m.s.). This 000 low mom Parl-

corresponds to 0.5 mA AC (r.m.s.). Good m wound

-Warning

S"?S".'°."

This equipment has been designed and manufactured to meet international safety standards.

It is the legl responsibility of the repairer to ensure that these safety standards are maintained.
Repairs must be made in accordance with the relevant safety standards.

It is essential that safety critical components are replaced by approved parts.

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

1-2

(No. 201 14)

Page 27

I ENE-057 El Source Selector PC Board Ass'y
Note: ENE-057 D Varies according to the employed. See note (1) when placing an order.

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(No. 20114) 2-11

Page 30

Accessories List

A Part Number Part Name Q'ty Description Areas
E30580-1518A Instruction Book 1 Except as
E30580-1518ABS Instruction Book 1 BS
BTZOOZSK Warranty Card 1 C
BT20029C Warranty Card 1 for Australia A
BT20098 Warranty Card 1 101 New Zealand A
BTZOOSGA Warranty Card 1 G
8720060 Warranty Card 1 BS
BTZOOGGA EEC Agency 1 G . BS
BY20071A Service Center Rist 1 C
BTZOOMF Saiety Instruction Sheet 1 J
E43486-340A Safety Sheet l 85
QZUOOB-OOI FTZ Information Sheet I G
92360-001 Caution Sheet 1 C
BTZOOABC Warranty Card 1 J
BT20108 Service Information 1 J
E66416-003 Envelope 1 for Warranty Card J

A E04056 Siemens Plug 1 u
35497-019 Caution Sheet I U
E41202} Envelope 1 Except BS
541202-28 Envelope 1 BS

The Marks for Designated Areas

"-the U.S.A
---Canada
----Austra|ia

West Germany

E , EF-- Continental Europe
BS ------ the UK
U .................... oher Countries

No mark indicates all areas

2-14 (No. 20114)

A: Safety Parts