Jvc XLM 408 BK Service Manual

Page 1

XL-MSOQTN
XL-M4OSBK
XL»M409TN

JVD
SERVICE MANUAL

XL-M309TN
XL-M408BK
0 XL-M409TN [333%

DIGITAL AUDIO

XL-M409TN/XL-M4OBBK

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Contents

Safety Precautions ....................... 1-2 Initial Operetion Mechanism ............ 1-37

Important for Laser Products ............. 1-3 Operation check by each swith .......... 1-40

Instruction Book ....................... 1-4 Flow of Functional Operation

Discription of Major LSIs ............... 1-24 Until TOC is Read ........ 1-41

Internal Block Diagrams of Other ICs 1-31 Troubleshooting ........................ 1-42

Internal Connection Block Diagrams .................... Insertion
for the FL Display Tube 1-32 Schematic Diagrams ................ Insertion

Disassembly Procedures ................. 1-33 Printed Circuit Board Insertion

. Adjustment Procedures ................. 1-35 Exploded View of Assemblies and
Maintenance of Laser Pickup ........... 1-36 Application Points for Grease . Insertion
Replacement of Laser Pickup ........... I-36 Parts list ..................... Insertion
No.20380

Dec.199 2

Page 2

XL-M 309TN
XL-M4083K
XL-M409TN

-$afety 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.

.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.

.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.

.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.

. 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,
contorl 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 1,5000 10 W
resistor paralleled by a 0.15 ,uF AC-type capacitor between an exposed metal part and a
known good earth ground.

AC VOLTMETER

kw

Measure the AC voltage across the resistor 4
with the AC voltmeter. a Lia/wagon. . _
Move the resistor connection to each exposed o 0_ °' '°'9 senst'v'tfl
metal part, particularly any exposed metal part
having a return path to the chassis, and 0.15»: AC TYPE
meausre the AC voltage across the resistor. -||-
Now, reverse the plug in the AC outlet and 319*
repeat each measurement. Any voltage W >gg3h223md
measured must not exceed 0.75VAC (r.m.s.). 15°09 10 metal part
This corresponds to 0.5 mA AC (r.m.s.). Good earth ground

-Warning

. This equipment has been designed and manufactured to meet international safety standards.
. It is the legal 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.
. lf mains voltage selector is provided, check setting for local voltage.

1-2 (No.20380)

Page 69

I Parts List (CD Changer Mechanism Ass'y)

XL-M4OBBK

Item Part Number Part Name Qty Description Areas
1 301001011 CHASSIS BASE 1
2 30050115T GUIDE BOSS 2
3 300501302T PRINTED CIRCUIT BOARD A ASSY 1
4 301001301T PRINTED CIRCUIT BOARD D ASSY 1
5 300501304T PRINTED CIRCUIT BOARD P ASSY 1
6 3010025021 ELEVATOR ARM A ASSY 3
7 301002503T ELEVATOR SIDE ARM B ASSY 2
8 301002504T ELEVATOR FRONTARM AASSY 1
9 30100221T CAM LEVER SPRING 1

10 30100222T CS COLLAR SCREW 1
11 30100223T CAM SPRING 1
12 30100202T LIFT CAM 1
13 30100250 ELEVATOR MOTOR BRACKET ASSY 1
14 RF-370C-15370 MOTOR Z
15 30100210T ELEVATOR GEAR B 2
16 30100211T ELEVATOR GEARC 1
17 30100212T ELEVATOR GEARD 1
18 64010120 LEAF SWITCH Z
19 30100204T CAM SLIDER 1
20 30100205T CAM SPRING PLATE 1
21 30100206T CAM LEVER 1
22 30100207T CAM ROLLER 1
23 30100301T GUIDE BASE 1
211 30100311T ELEVATORSLIDE LEVER 1
25 30100312T ELEVATOR SLIDE LEVERSPRING 1
26 30100303T MAGAZINE GUIDE 1 LEFT
27 30100304T MAGAZINE GUIDE 1 RIGHT
28 30100305T GUIDE COVER 1
29 30050309T TRAY STOPPER 1
30 30100310T RELEASE LEVER 1
31 30100308T ELEVATOR KICK LEVER 1
32 30100307T LOCK LEVER 1
33 30100309T ELEVATOR KICK LEVER SPRING 1
34 30100313T RELEASE LEVER SPRING 1
35 30100306T CAM STABILIZER 1
36 64020403T PUSH SWITCH 4
37 30050508T FEED GEAR A 2
38 3010055011 FEED RAILASSY 1
39 30100504T HOOK SLIDE GEAR 1
40 30100505T SLIDE GEAR PLATE 1
41 30050738T TURNTABLE BASE 1
42 600207051' MOTOR 1
43 30050729T TURNTABLE 1
44 30050713T TURNTABLE PLATE 1
45 3005074ZT CONTROLLER SPRING 1
46 30050721T FLOATING RUBBER 3
47 3005071 ST FLOATING SPRING (B) 2
48 30050743T FLOATING SCREW 3
49 30050740T FLOATING SPRING 1
50 60021102T MOTOR 1
51 30050709T MOTOR PULLEY 1
52 30050714T FEED MOTOR BELT 1
53 30050737T PICK UP SUPPORT 1
54 30050724T SHAFT HOLDER A 1
55 300507303T FEED SCREW ASSY 1

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