Jvc CA TD5 Service Manual

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Extracted text from Jvc CA TD5 Service Manual (Ocr-read)

Page 1

CA-TD5/CA-TD55R

Pick up OPT-60
co Lsi MN35510

Area Suffix

A ................................ Australia
BS ............................... The U.K.

EF Continental Europe Except
Germany & Italy

EN .................. Nordic Countries
G ............................ Germany
VX ................ Eastern Europe
UB ....................... Hong Kong
UP ................................ Korea
US ......................... Singapore
UT ....................... Taiwan
U ............... Universal except all
of above
[lﬂ lit-EME-
CO "tents DIGITAL AUDIO
Safety Precautions ....................................... 1-2 XT-TD5/XT-TD55R ............................................ 3-1
Important for Laser Products ............................ 1-3 Descriptions of Major le .............................. 3-1
Instruction Book ............................................ 1-4 Main parts Layout .......................................... 3-9
RX-TD5/RX-TD55R ............................................ 2-1 Disassembly Procedures ............................ 3-10
Description of Major ICs ..... 2-1 Block Diagrams .........
Internal Connection of Display ..................... 2-8 Schematic Diagram .................................... 3-27
Main parts Layout ......................................... 2-9 Printed Circuit Boards ............................ 3-29
Disassembly Procedures ......................... 2-10 Parts List
Adjustment Procedures ............................... 2-13 RX-TD5/RX-TD55R .......................................... 4-1
Block Diagram ................................................ 2-14 XT-TD5/XT-TD55Fl ............................................ 5-1
Schematic Diagrams .................................. 2-15
Printed Circuit Boards ........................... 2-23

No.20631

Page 2

pA-TWCA-Tgsm _

-Safety Precautions

1.The 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. 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 manufacturer's 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 (A) on the Parts
List in the Service Manual. The use of a substitute repalcement 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 currnet 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 10 W
resistor paralleled by a 0.15 pF AC-type capacitor between an exposed metal part and a
known good earth ground.
Ac VOLTMETER i

Measure the AC voltage across the resistor . -

. 1 (Havm 1000 .
With the AC voltmeter. ohms/30m. _ . [
Move the resistor connection to each exposed 0r moresenSItlvityJ

metal part, particularly any exposed metal part
having a return path to the chassis, and
meausre the AC voltage across the resistor.
Now, reverse the plug in the AC outlet and
repeat each measurement. Any voltage

Place this
probe on
each exposed

measured must not exceed 0.75 V AC (r.m.s.). 1500? low metal part.
This corresponds to 0.5 mA AC (r.m.s.). Good earth ground
- Warning

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. It is essential that safety critical components are replaced by approved parts.
5. If mains voltage selector is provided, check setting for local voltage.

Page 14

CA-TD5/CA-TD55R

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