Jvc THA 10 R Service Manual

Page 1

TH-A10R/TH-A10

TH-A10R/TH-A10

JVB

SERVICE MANUAL

DVD DIGITAL THEATER SYSTEM

TH-A1OR

SP-PWAIO

SP-XSA10

TH-A1O

RM-STHAIOFI

SP- XSA10

XV- THA10R

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Area Suffix Area Suffix
TH-A10R TH-A10
B --------------------- U.K. E ------ Continental Europe
EN - Northern Europe
EE ----------------- Russia
XV-THAIOFI (DVD pla er)/XV-TH-A1O
SP-PWA10 (Powered Subwoofer)
TH-A1OR _
TH-A1O SP THA10_ SP-XCA10 (Center speaker)
(Speaker sectIon) ,
SP-XSA10 (Satelllte Speaker) x 4
Contents
Safety Precautions ------------------------- 1-2 Flow of functional operation
v Important for laser products ------------- 1-3 until TOC read ------------ 1-24
Preventing static electricity -------------- 1-4 Maintenance of laser pickup ------------ 1-25
V'CTOR COMPANV OFMPANI LIMITED Disassembly method ---------------------- 1-5 Replacement of laser pickup ............ 1.25
OPTICAL Disc BUSINESS DIV. PERSONAL& MOBILE NETWORK BUSINESS UNIT Adjustment method ________________________ 1.21 Description Of major ICS __________________ 1-26
AV & MULTIMEDIA COMPANY 1644, Shimotsuruma, Yamato, Kanagawa 242-8514, Japan
No.20872 .Smgfapa COPYRIGHT (c) 2000 VICTOR COMPANY OF JAPAN, LTD. 3:62:33:

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TH-A1OR/TH-A10

-Safety precautions

1.

2.

This 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 manufacturers
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 (Q) 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.

.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, 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.

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 1,5009 10W resistor paralleled by
a 0.15uF AC-type capacitor between an exposed

AC VOLTMETER
metal part and a known good earth ground. (Having 1000
Measure the AC voltage across the resistor with the ' 7 ohms/volts,
AC voltmeter. or more sensitivity)
Move the resistor connection to eachexposed metal ° °
part, particularly any exposed metal part having a 0_15,uF AC TYPE
return path to the chassis, and meausre the AC _"_ Place this
voltage across the reSIstor. Now, reverse the plug In probe on
the AC outlet and repeat each measurement. voltage 'WV > each exposed
measured Any must not exceed 0.75V AC (r.m.s.). 15009 10W metal part.

This corresponds to 0.5 mA AC (r.m.s.).
Good earth ground

-Warning
1.
2.
3.
4.
5.

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.

If 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 in the case of preforming repair of this system.

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TH-A1OR/TH-A1 O

lFtemoving the DVD mechanism assembly DVD mewanism °°Ver
(See Fig.22 and 23)

Prior to performing the following procedure, remove
the top cover, the rear cover, the front panel
assembly, the DVD servo control board case, the
analog | / 0 board, the digital | / 0 board and the
tuner board.

1. Disconnect the harnesses from the spacer on the
upper side of the DVD mechanism cover.

2. Remove the two screws | and the one screw J
attaching the DVD mechanism cover. I Spacer |

3. Remove the two screws K attaching the DVD Fig.22
mechanism assembly. DVD mechanism assembly

4. Remove the DVD mechanism assembly upward
while pulling it backward.

lFtemoving the power board
(See Fig.24 and 25) Fig.23

' Prior to performing the following procedure, remove
the top cover, the rear cover, the front panel
assembly, the DVD servo control board case and the
digital I / 0 board.

Rear panel

1. Disconnect the harness from the spacer on the
upper side of the DVD mechanism cover.

2. Remove the two screws E attaching the power E E
board on the back of the body. Fig.2 4

3. Disconnect the harness from connector CN911 and
CN912 on the power board. Power transformer assembly

CN911,CN912

4. Remove the four screws L attaching the power
board.

5. Disconnect connector CN913 and CN914 of the M
power board from the main board by pulling out them
respectively.

Power board

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TH-A1OR/TH-A10

Traverse chassis

I Removeing the turntable and spindle motor assemby
(refer to Figures 8 - 9)
0 Remove the traverse mechanism unit.
0 Solder the flexible ground point on the optical pickup.
(Figure 6)
0 Remove the mechanism control board.
1. Remove the flexible harness from the feed motor
connector on the spindle motor board assembly.
2. Remove the three screws at D fixing the spindle motor
from the bottom of the traverse chassis.

I Removing the feed motor unit (refer to Figure 9)
0 Remove the traverse mechanism unit.
0 Remove the mechanism control board.
1. Remove the FPC from the feed motor connector Figure 8

on the turntable spindle motor board.
2. Remove the two screws at E fixing the feed motor unit.

Traverse mechanism unit

. . . . . Pick-up assembly
I Removmg the optical pickup unit (refer to Figure 9)

0 Remove the traverse mechanism unit.
0 Remove the mechanism control board. E
0 Remove the feed motor unit.

1. Remove the screw at F fixing the guide shaft holder at B, @
then simultaneously remove the guide shaft at B and the
optical pickup unit. While doing so, slide the unit
horizontally away from the guide shaft at A. E

Guide shaft B

Feed motor assembly

Flexible harness
Turn table spindle motor unit
Feed motor connector

Figure 9

1-15

Page 65

TH-A10R/TH-A10

Standerd schematic diagrams -,- - I
I System control section

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A Parts are safety assurance parts. Digital (Audio) signal Audio signal
When replacing those parts make sure to use the specilied one.
A l B c D E F G H | J

2-6

Page 69

TH-A10R/TH-A10
I DVD Servo control section 2/2

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A Parts are safety assurance parts. Digtal (Audio) signal Video (Color) signal

When replacing those parts make sure to use the specified one.

Digital (Video) signal
Video (Luminance) signal li> Digital data signal

A B C D E F G H | J
2-10

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TH-A1OR/TH-A1O

Block N0. E E E E
Block No. E E E

Packing materials and accessories parts list

3-34