Jvc HX 5 Service Manual

Page 1

HX ~ 5 B/E/G/Gl/ENNX

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DIGITAL AUDIO

Area Suffix
..................... U.K.

-Conunenta| Europe

.............. Germany

GI ........................................ IIaIy

EN -- -~-Noth Europe

VX--- Eastern Europe

Co ntents

1. Safety Precautions -------------------------------------- Page 2 B. Analytic Drawing and Pans List -------------------------- 56

2. Safety Precaution about HX _ 5 ............................. 3 9. Wiring Connections .......................................... 62

3. Instructions ......................................................... 5 10. Block Diagram ................................................ 63

4. Location of Main Parts--- ~33 11. Standard Schematic Diagram ----------- 7o

5. Removal of Main Parts -- --35 12. Location of P.C. Board Parts ---------------- 77

5' Main Adjustmem ............................................... 44 13. Electrical Parts U51 ........................................... 82

7. Troubleshooflng ----------------------------------------------- 50 14. IllusIration of Packing and Parts List ------------------- 96
NO. 1923

March 1995

Page 2

HX - 5 B/E/G/Gl/ENNX J

1. Safety Precautions

_

.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. 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 manufacture'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 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 schematic 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 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
reassembling.

5. Leakage current check (Electrical shock hazard testing)

After reassembling the product. always perfonn 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 card directly into the AC outlet. Using aLeakage 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 exposeed 0.5mA AC(r.m.s.)

. Alternate check method AC V 0 LTMETER
Plug the AC line cord directly into the AC outlet. Use an AC voltmeter m (Having 1000 ohms/volt,

having 1.000 ohms per volt or more sensitivity in the following manner. or "1°" "MMW')

Connect a 1.500 ohms 10W resistor paralleled by a 0.15 [1. F AC type o-rT
. 0.15 14F AC TYPE
capacttor between an exposed metal part and a known good earth
ground. Measure the AC voltage across the resistor with the AC PM. this prob:
. - ct'on me rt, W on each exposed
voltmeter Move the resistor oonne I to each exposed tal pa 150° n 10W metal part.

particularly any exposed metal part having a retum path to the chassis.
and measure the AC voltage across the resistor. Now. reverse the plug Goad rm ground
in the AC outlet and repeat each measurement. Any voltage measured must not exceed 0.75V AC(r.m,st). This corresponds to

0.5mA AC(r.n1.s.).

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.

2 (No. 1923)