Jvc PC XC30 Service Manual

Page 1

f i .JVD
SERVICE MANUAL

PC-XC3O C/J

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DIGITAL AUDIO

Area Suffix
C ..................... Canada

Contents

I Safety Precautions 8. Location of PC Board Parts and Panelist

I Safety Precautlon about PC 7 xcaom I Main ampllfier board ....................................... 53
. lnstructions(extracts) ..... .CD ampflfler board .......................................... 58
1. Location of Main Parts ISystem microprocessor/key switch board -------- 60
2. Removal of Main Parts ------------------------------------- 27 ITuner board(C/J version) ~~~~~~~~~~~~~~~~~~~~~~~ 63

3. Main Adjustments ------------------------------ I CD changer microprocessor board ----- 75
4. CD changer mechanism troubleshooting - 9. Exploded View of Enclosure Component Parts

5. Block Diagram --------- I Receiver section ------------- 66
6. Wiring Connections -- ISpeaker box section ~ ----- 69

7. Standard Schematic Diagram 10. Exploded View of Mechanism Component Parts
I CD changer microprocessor circuit I Cassette mechanism sectionm .-
I Head amplifier circuit -------------------- I CD changer mechanism section
.Tuner CII'CUII .............................. .cD mechan|sm secflon .................
ISystern microprocessor circuit---- 11. Illustration of Packing and Parts List--
I CD amplifier circuit ------
I Amplifier circuit -----------

..10

No. 1908
July 1994

Page 2

PC - X030 C/J

I Safety Precautions

1.The design this product contains special hardware and many circtJits 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 pans
must be identical to those used in the original circuits. Service 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 manufactures 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 ( ) and( A )on 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.

4. The leads in the products are routed and dressed with ties. clamps . tubings. barriers and the like to be separated from live pans.
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.

5. Leakage current check (Electrical shock hazard testing)

After re-assembling the product. always perform an isolation check on the exposed metal pans 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. particularly any exposed metal part having a return path to the chassis. to a known good eanh
ground. Any leakage current must not exceed 0.5mA AC(r.m.s.).

- 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 1.500 ohms 10W resistor paralleled by a 015 ,u F AC type capacitor between an exposed metal
part and a known good earth ground. Measure the AC voltage across the resistor with the AC voltmeter. Move the resistor
connection to each exposed metal pan. 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.m.s.). This corresponds to 0.5mA AC(r.m.s.).

2 (No.1908)

Page 87

PC 4 X030 C/J

l3 LO c K N 0. MIMBDJII

REF, PARTS NO. PARTS NAME REMARKS QTY SUFFIX CLR
43 30070203T E MOTOR BRACKET 1
44 30070214T E GEAR 62 1
AS 3007021ST E GEAR 63 1
46 30070217T E GEAR GB 1
47 30070218T E GEAR 66 2
48 30070220T E GEAR 68 1
49 30070221T E GEAR 69 1
50 30070228T E CONTROL PLATE 1
S1 30070232T E GEAR 62 SP. 1
52 30070233T E SENSOR SPRING 1
53 30070259T E GEAR GA 1
54 30070266T E SENSOR BKT. 1
56 30070755T F.RUBEER SP JA 2
57 30070756T F.RUBBER SP JB 2
58 30071103T L GEAR B 1
59 30071104T L GEAR C 1
60 300711OST L GEAR D 2
61 30071106T L GEAR E 1
81 930320041T SCREW(M2 X 4) M2 X 4 1
82 950420041T SCREW(M2 X 4) M2 X 4 18
83 9P0420051T SCREW(M2 X 5) M2 X 5 1
84 9P0420061T SCREW M2 X 6 4
BS 9C2020251T SPECIAL SCREW M2 X 2.5 3
86 9E0100252T E RING 2.5 1
87 9P0226041T TAMS SCREW M2.6 X 4 A
88 9P1720061T SCREW M2 X 6 1
89 9W0250080T WASHER 1.85 X 5 X 0.5 1
90 9W0250110T WASHER 2.6 X 6 X 0.5 2
91 9W0250130T WASHER 3 X 6 X 0.5 1
92 9W0650220T WASHER 2.6 X 4.5 X 0.5 4
93 9B12200A1T SCREW M2 X 4 3
94 9P0720061T P.TAP.SCREW M2 X 6 1
95 9C0320353T SCREW M2 X 3.5 2
96 9P0420081T SCREW M2 X 8 1
97 9C1920301T SCREW M2 X 3 1
98 9P0426051T SCREW M2.6 X 5 1
99 9W064007OT HL WASHER CUT M2.1 X A X 0.4 1

(No.1908) 73