Jvc UX 1000 GR Service Manual

Page 1

UX ' 1000GR B/E/EN/G

JVB
SERVCE MANUAL.

UX- 1 OOOGR B/E/EN/G

Contents

membWM-i

. Safety Precautions --------------

. Safety Precaution about UX-1000

. Instructions ........................................................ 5
. Location of Main Parts ........................................ 1g
. Removal of Main Pans ~

. Main Adjustment -----------------------

Troub|eshooting ................................................ 29
Main [C Block Diagram ...................................... 37

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DlGITAL AUDIO

Area Suffix

........................... U.K.
------- Continental Europe
EN ------------------------- North Europe
G .................................. Germany

9. Block Diagram --

10. Wiring Connections ~-
11. Standard Schematic Diagram --------------------------- 42
12. Location of P.C. Board Pans ------------------------------ 47
13. Analytic Drawing and Parts List-
14l Electrical Pans List---
15. packing .................

No. 1981
July 1996

Page 2

UX - 1000GR B/EIEN/G

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.

2. Alterations of the design or circuitry of the product should not be made. Any design alterations oi 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 (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 pans 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. 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 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

Plug the AC line cord directly into the AC outlet. Use an AC voltmeter m mix%L%%§§:s/volx
having 1.000 ohms per volt or more sensitivity in the following manner. . or more sensitivity.) .

capacitor between an exposed metal pan and a known good earth 0.15uF AC TYPE
ground. Measure the AC voltage across the resistor with the AC L

voltmeter. Move the resistor connection to each exposed metal part.

Connect a 1.500 ohms 10W resistor paralleled by a 0.15 11 F AC type a r

Ptace this probe
on each exposed
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 resistort Now. reverse the plug 500d earth 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 parts.

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

A CAUTION

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

2 (No. 1981)

Page 32

UX - 1000GR B/E/EN/G

9 HOW TO OPERATE THE CD SELF -
DIAGNOSISFUNCTION

OThe CD Self- diagnosis Function

If any malfunction occurs in the CD player, this system can

be set to make an error code indication appear on the LCD

to point out the defective parts. This efficiently helps

service personnel find the causes of the malfunction.

1. Operation

Press the three -. -and
buttons on the remote control to enter the Test mode.
(Then the illuminating portions of the LCD all light up
together. This indicates that the system has entered the
Test mode.)

[2 Play a CD. If the operation is defective in any way an
error code should appear on the LCD.

El Identify the point of malfunction in accordance with the
error code displayed.

2, Error codes & defective points

30 (No. 1981)

Error identified
times

Flow charts

1

D sel -
diagnosis
funcfio

hen reading
TOC

10 - see. time out

Is feed ted to
inner area?

10- see. time out

I: feed fed to
cute r area?

Does laser tur
on?Does It
locus?

Does the
spindle spin?
Does th

30-590. time out

Does TOG ,
reading begin?

0C - reading
com plete

3< sect time out

Can 0- code be
read for 3
successive sees}?

)4 see. time out

n track selectionv
does the
beginning of the
selection play?

Spindle servo

Y

N Feed motor defective

N spindle motor detective

N Ern

Defective points

1

Eflective oniy in Test
mode

__-__._i

Err 1

Feed motor defective
Rest switch defective
Gear defective

Err 2

Rest switch detective
Gear defective

Err 3

Laser defective
Focus servo defective
Pickup defective

Err 7

Tracking servo defective
Pickup defective

Err 4
lickup defective
Servo SYSle- detective

Err 5
Servo system dnfective
new; defective

.____-l

Err S
Servo system doiamlve
PICKUD defective

Sin/D system delealve
Mup defective