Jvc MXD 351 TR Service Manual

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MX-D351 TR

JVB
SERVICE MANUAL I

MX-D351TR B/EIEN/G/VX

COMPACT
DIGITAL AUDIO

Area Suffix
This Service manual have not "lnstructions "," Location of B ...U.K.
main Pans ," Outline of Main IC "." Analytic Drawing for E ..Continental Europe
CD traverse mechanism and Cassette mechanism etc. EN ____ North Europe

" Block Diagram " and so on.These items should be used in

G .................. Germany

conjunction with service manual for MX-DSSlTR all version VX Eastern Europe

(Issue No.10056). """"""""
Contents
1.Safety Precautions ....................................... Page1-1 8.Wiring Connections. ........ 8-1
2.Safety Precaution about MX-D351TR ................... 2-1 9.Analytic Drawing and Parts List... 9-1~2
3Jnslructi0ns... ---3-1 10.Standard Schematic Diagrams ........... 10-1~10
4.Location of Main Parts 4-1 11.Location of P.C.Board Parts .. .11-1~3
S-Removal of Main parts" -- 5-1~15 12.Electrical Parts List ................ 12-1~9
6.Main Adjustment ................ 6-1 ~4 13.Packing ................................................... 13-1~2
7.0m Line of Main IC ............................................... 7-1

COPYRIGHT © 1997 VICTOR COMPANY OF JAPAN, LTD. No.10058

August 1997

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MX-D351TR
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. Service should be performed 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 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 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 ( A )on the schematic diagram and 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 . tubings. barriers and the like to be separated from live parts. high

temperature parts. mpving 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.

. Leakage current 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.

- Plug the AC line cord directly into the AC outlet. using aLeakage current tester", measure the leakage current from each exposed
metal part 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.)

Alternate check method

Pl th c r d ' t . If t AC VOLTMETER
ug e A me cor direc ly into the AC outlet Use an AC vo me er E (Havlng1000 ohms/volt.

having 1.000 ohms per volt or more sensitivity in the following manner. or more sensitivity.)
Connect a 1.500 ohms 10W resistor paralleled by a 0.15 ,u F AC type 3-0-1.-
capacitor between an exposed metal part and a known good earth 0-15MF AC TYPE
ground. Measure the AC voltage across the resistor with the AC

. Place this probe
voltmeter. Move the resistor connection to each exposed metal part. w on each oxposod

1500, n 10 W 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 Good Barth ground

in the AC outlet and repeat each measurement. Any voltage measured

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 maintaintaind.
3. Repairs must be made in accordance with the relevant safety standards.

4, It is essential that safety critical components are replaced by approved pans.

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

1-1

A CAUTION

Burrs formed during moldlng may be left over on some parts of the chassis. Therefore. pay attention to
such burrs In the case of preformlng repair of this system.

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MX-D351 TR

4.Location of Main Parts

Refer to Service manual for MX-D551TR B/E/EN/G (Issue No.10056).

4-1