JVC TH-P3A User manual

SERVICE MANUAL
COPYRIGHT © 2006 Victor Company of Japan, Limited No.MB541
2006/7
DVD DIGITAL CINEMA SYSTEM
MB54120067
TH-P3A,TH-P3US,TH-P3UB,
TH-P3UW,TH-P3UX,TH-P3UY,
TH-P3UJ,TH-P3UG,TH-P3UN
Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
XV-THP3
SP-THP3F SP-THP3F
SP-THP3C SP-THP3SSP-THP3S
SP-WP5

1-2 (No.MB541)
SPECIFICATION
Center unit (XV-THP3)
* For the countries of the Middle East
Audio section Front/Surround 40 W per channel, RMS at 3 Ωat 1 kHz, with 10 % total harmonic
distortion.
Center 100 W, RMS at 4 Ωat 1 kHz, with 10 % total harmonic distortion.
Subwoofer 100 W, RMS at 4 Ωat 30 Hz, with 10 % total harmonic distortion.
Video section Video System PAL/NTSC
Horizontal Resolution 500 lines
Signal-to-Noise Ratio 64 dB
Video output level Composite 1.0 V(p-p)/75 Ω
S-video-Y 1.0 V(p-p)/75 Ω
S-video-C For PAL: 0.3 V(p-p)/75 Ω
For NTSC: 0.286 V(p-p)/75 Ω
Component
(Interlace/Progressive)
Y : 1.0 V(p-p)/75 Ω
PB/PR : 0.7 V(p-p)/75 Ω
USB storage USB specification Compatible with the USB 2.0 Full-Speed
Compatible device Mass Storage Class
Compatible file system FAT16, FAT32
Bus power supply Max. 500 mA
Tuner section Tuning Range FM 87.50 MHz to 108.00 MHz
AM At 10 kHz intervals : 530 kHz to 1 710 kHz (*1 600 kHz)
At 9 kHz intervals : 531 kHz to 1 710 kHz (*1 602 kHz)
Speaker impedance Front/Surround 3 Ωto 16 Ω
Center/Subwoofer 4 Ωto 16 Ω
General Power Requirements AC 110 V - 240 V , 50/60 Hz
Power Consumption 60 W (at operation)
1.4 W (in standby mode)
Dimensions (W ×H ×D) 435 mm ×70 mm ×308 mm
Mass: 3.0 kg

(No.MB541)1-3
Speakers
Designs & specifications are subject to change without notice.
Subwoofer (SP-WP5) Type Bass-Reflex Type
Speaker 16 cm cone ×1
Power Handling Capacity 100 W
Impedance 4 Ω
Frequency Range 35 Hz to 200 Hz
Sound Pressure Level 75 dB/W·m
Dimensions (W ×H ×D) 129 mm ×284 mm ×337 mm
Mass 3.1 kg
Front speakers (SP-THP3F) Type 1-Way Bass-Reflex Type (Magnetically-shielded Type)
Speaker 6.5 cm cone ×1
Power Handling Capacity 40 W
Impedance 3 Ω
Frequency Range 90 Hz to 20 000 Hz
Sound Pressure Level 75 dB/W·m
Dimensions (W ×H ×D) 92 mm ×99 mm ×95.5 mm
Mass 0.45 kg each
Center speaker (SP-THP3C) Type 1-Way Bass-Reflex Type (Magnetically-shielded Type)
Speaker 6.5 cm cone ×1
Power Handling Capacity 100 W
Impedance 4 Ω
Frequency Range 90 Hz to 20 000 Hz
Sound Pressure Level 76 dB/W·m
Dimensions (W ×H ×D) 92 mm ×99 mm ×95.5 mm
Mass 0.45 kg
Surround speakers (SP-THP3S) Type 1-Way Bass-Reflex Type
Speaker 6.5 cm cone ×1
Power Handling Capacity 40 W
Impedance 3 Ω
Frequency Range 90 Hz to 20 000 Hz
Sound Pressure Level 72 dB/W·m
Dimensions (W ×H ×D) 92 mm ×99 mm ×95.5 mm
Mass 0.48 kg each

1-4 (No.MB541)
SECTION 1
PRECAUTION
1.1 Safety Precautions
(1) This design of this product contains special hardware and
many circuits and components specially for safety purpos-
es. 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 per-
formed 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 manufacturers 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 products have
special safety-related characteristics. These characteris-
tics are often not evident from visual inspection nor can the
protection afforded by them necessarily be obtained by us-
ing replacement components rated for higher voltage, watt-
age, etc. Replacement parts which have these special
safety characteristics are identified in the Parts List of Ser-
vice Manual. Electrical components having such features
are identified by shading on the schematics and by ( ) on
the Parts List in the Service Manual. The use of a substitute
replacement which does not have the same safety charac-
teristics as the recommended replacement parts 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 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 reassem-
bling.
(5) Leakage shock hazard testing
After reassembling the product, always perform an isola-
tion check on the exposed metal parts of the product (an-
tenna 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 a
"Leakage Current Tester", measure the leakage current
from each exposed metal parts of the cabinet, particular-
ly any exposed metal part having a return path to the
chassis, to a known good earth ground. Any leakage cur-
rent 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, 1,000Ωper volt or more sensitivity
in the following manner. Connect a 1,500Ω10W resistor
paralleled by a 0.15µF AC-type capacitor between an ex-
posed 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
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 in the AC outlet and
repeat each measurement. Voltage measured any must
not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5
mA AC (r.m.s.).
1.2 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 maintained.
(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) If mains voltage selector is provided, check setting for local
voltage.
1.3 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 pre-
forming repair of this system.
1.4 Critical parts for safety
In regard with component parts appearing on the silk-screen
printed side (parts side) of the PWB diagrams, the parts that are
printed over with black such as the resistor ( ), diode ( )
and ICP ( ) or identified by the " " mark nearby are critical
for safety. When replacing them, be sure to use the parts of the
same type and rating as specified by the manufacturer.
(This regulation dose not Except the J and C version)
Good earth ground
Place this
probe on
each exposed
metal part.
AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)
1500 10W
0.15 F AC TYPE

(No.MB541)1-5
1.5 Preventing static electricity
Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser
diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.
1.5.1 Grounding to prevent damage by static electricity
Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as laser products.
Be careful to use proper grounding in the area where repairs are being performed.
(1) Ground the workbench
Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the
traverse unit (optical pickup) on it.
(2) Ground yourself
Use an anti-static wrist strap to release any static electricity built up in your body.
(3) Handling the optical pickup
• In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical
pickup are shorted. After replacement, return the shorted parts to their original condition.
(Refer to the text.)
• Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power source can easily
destroy the laser diode.
1.6 Handling the traverse unit (optical pickup)
(1) Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit.
(2) Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific details, refer to the
replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long a
time when attaching it to the connector.
(3) Handle the flexible cable carefully as it may break when subjected to strong force.
(4) I t is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.
1.7 Attention when traverse unit is decomposed
*Please refer to "Disassembly method" in the text for the pickup unit.
• Apply solder to the short land sections before the card wire is disconnected from the connecto on the servo board. (If the card wire
is disconnected without applying solder, the pickup may be destroyed by static electricity.)
• In the assembly, be sure to remove solder from the short land sections after connecting the card wire.
1M
Conductive material
(conductive sheet) or iron palate
(caption)
Anti-static wrist strap
Solder short

1-6 (No.MB541)
1.8 Important for laser products
1.CLASS 1 LASER PRODUCT
2.CAUTION :
(For U.S.A.) Visible and/or invisible class II laser radiation
when open. Do not stare into beam.
(Others) Visible and/or invisible class 1M laser radiation
when open. Do not view directly with optical instruments.
3.CAUTION : Visible and/or invisible laser radiation when
open and inter lock failed or defeated. Avoid direct
exposure to beam.
4.CAUTION : This laser product uses visible and/or invisible
laser radiation and is equipped with safety switches which
prevent emission of radiation when the drawer is open and
the safety interlocks have failed or are defeated. It is
dangerous to defeat the safety switches.
5.CAUTION : If safety switches malfunction, the laser is able
to function.
6.CAUTION : Use of controls, adjustments or performance of
procedures other than those specified here in may result in
hazardous radiation exposure.
REPRODUCTION AND POSITION OF LABELS and PRINT
!Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
WARNING LABEL and PRINT

(No.MB541)1-7
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
CAUTION:
Symbol C905(in power supply board) is noted not to touch because the voltage collects in the capacitor.
D901
B9207
D902
D903
D906
D904
D905 PC901
D9002
D9022
CP951
EP901
EP951
FC901FC902
C9010
C921
C9016
C905
C903
C901
C9005
C907
R9072
R901
R9001
R911
R913
C902
C904
C916
C911
C909
CN901
R905
R902
R912
B9109
D907
R910
IC951
D9021
D9001
C9001
C9002
C9003
C9072
D9032
R9077
C9011
D9011
D9007
D9004
L9001
C9014
D9031
R9034
Q9011
D9005
D9012
L9002
C9023
FW901
B9404
C9031
R9009
D9013
L9003
C9019
C9076
B9604
B9501
B9504
B9108
B9701
FW903
VA901
R906
R908
R909
B901
D9009
TH901
R9005
D9003
C9006
D9023
R9004
C9007
FW902
D9081
C908
B9402
C9082
R9081
B9309
R9015
R9082
T901
C906
B9209
D9033
C9012
B9196
D9015
D9014
HS901
IC901
HS951
EP902
L901
B9304
B9305
B9601
D9037
B9101
L9004
C9017
C9024
L9005
CP952
C9036
R9088
C9074
R9080
C9073
B9307
B9208
B9602
B9403
B9103
B9310
B9401
B9204
B9205
B9301
B9502
D9035
D9034
B9503
C922
B9951
L902
D9036
IC953
D9041
HS953
B9191
D9010
B9107
B9203
B9302
B9105
B9303
D9038
B9193
R9008
D9024
B9194
D9039
Q9039
B9195

1-8 (No.MB541)
SECTION 3
DISASSEMBLY
3.1 Main body
3.1.1 Removing the video board (See Fig.1 to 3)
(1) Remove the metal cover.
(2) Disconnect the card wire from CN652 of the video board,
and then remove the two screws Aattaching the tuner
pack. (See Fig.1 and 2)
(3) Remove the card wires from connector CN601 and CN651
of the video board. (See Fig.1)
(4) Remove the three screws Battaching the video board from
backside of main body. (See Fig.2)
(5) Remove the two screws Cattaching the video board. (See
Fig.3)
Reference:
For other method, please refer the service manual TH-P3 (No.
MB512).
Fig.1
Fig.2
Fig.3
CN652
CN651 CN601
Tuner packVideo board
A
BB
CC
VIdeo board

(No.MB541)1-9
SECTION 4
ADJUSTMENT
Please refer to "TH-P3 (No.MB512)" about this section.
SECTION 5
TROUBLESHOOTING
Please refer to "TH-P3 (No.MB512)" about this section.

SERVICE MANUAL
COPYRIGHT © 2006 Victor Company of Japan, Limited No.MB512
2006/2
DVD DIGITAL CINEMA SYSTEM
MB51220062
TH-P5B,TH-P5E,TH-P5EN,
TH-P5EV,TH-P3B,TH-P3E,
TH-P3EN,TH-P3EV
Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24
(Only for TH-P5)
XV-THP3
SP-WP5
SP-THP3F
SP-THP3C
SP-THP3S
XV-THP5
SP-WP5
SP-THP5F
SP-THP5C
SP-THP5S

1-2 (No.MB512)
SPECIFICATION
Center unit (XV-THP5/XV-THP3)
Subwoofer (SP-WP5)
Audio section Front/Surround 40 W per channel, RMS at 3 Ωat 1 kHz, with 10 % total harmonic distortion.
Center 100 W, RMS at 4 Ωat 1 kHz, with 10 % total harmonic distortion.
Subwoofer 100 W, RMS at 4 Ωat 30 Hz, with 10 % total harmonic distortion.
Video section Video System PAL
Horizontal Resolution 500 lines
Signal-to-Noise Ratio 64 dB (Composite signal when "RGB" is selected)
Video output level Composite 1.0 V(p-p)/75 Ω
Y 1.0 V(p-p)/75 Ω
C 0.3 V(p-p)/75 Ω
RGB 0.7 V(p-p)/75 Ω
Only for XV-THP5 Component-Y 1.0 V(p-p)/75 Ω
Component-PB/PR 0.7 V(p-p)/75 Ω
USB storage USB specification Compatible with the USB 2.0 Full-Speed
Compatible device Mass Storage Class
Compatible file system FAT16, FAT32
Bus power supply Max. 500 mA
Tuner section Tuning Range FM 87.50 MHz to 108.00 MHz
AM (MW) 522 kHz to 1 629 kHz
General Power Requirements AC 230 V , 50 Hz
Power Consumption 60 W (at operation)
1.4 W (in standby mode)
Dimensions (W ×H ×D) 435 mm ×70 mm ×308 mm
Mass 3.0 kg
Type Bass-Reflex Type
Speaker 16 cm cone ×1
Power Handling Capacity 100 W
Impedance 4 Ω
Frequency Range 35 Hz to 200 Hz
Sound Pressure Level 75 dB/W·m
Dimensions (W ×H ×D) 129 mm ×284 mm ×337 mm
Mass 3.1 kg

(No.MB512)1-3
Satellite speakers (For TH-P5)
Satellite speakers (For TH-P3)
Designs and specifications are subject to change without notice.
Front speakers (SP-THP5F) Type 3-Way Bass-Reflex Type (Magnetically-shielded Type)
Speaker 11.5 cm cone ×1
4 cm cone ×1
1.5 cm cone ×1
Power Handling Capacity 40 W
Impedance 3 Ω
Frequency Range 60 Hz to 20 000 Hz
Sound Pressure Level 82 dB/W·m
Dimensions (W ×H ×D) 146 mm ×246.5 mm ×208 mm
Mass 2.2 kg each
Center speaker (SP-THP5C) Type 1-Way Bass-Reflex Type (Magnetically-shielded Type)
Speaker 6.5 cm cone ×2
Power Handling Capacity 100 W
Impedance 4 Ω
Frequency Range 90 Hz to 20 000 Hz
Sound Pressure Level 79 dB/W·m
Dimensions (W ×H ×D) 250 mm ×85 mm ×91 mm
Mass 0.82 kg
Surround speakers (SP-THP5S) Type 1-Way Bass-Reflex Type
Speaker 6.5 cm cone ×1
Power Handling Capacity 40 W
Impedance 3 Ω
Frequency Range 90 Hz to 20 000 Hz
Sound Pressure Level 72 dB/W·m
Dimensions (W ×H ×D) 79.5 mm ×147 mm ×88 mm
Mass 0.51 kg each
Front speakers (SP-THP3F) Type 1-Way Bass-Reflex Type (Magnetically-shielded Type)
Speaker 6.5 cm cone ×1
Power Handling Capacity 40 W
Impedance 3 Ω
Frequency Range 90 Hz to 20 000 Hz
Sound Pressure Level 75 dB/W·m
Dimensions (W ×H ×D) 92 mm ×99 mm ×95.5 mm
Mass 0.45 kg each
Center speaker (SP-THP3C) Type 1-Way Bass-Reflex Type (Magnetically-shielded Type)
Speaker 6.5 cm cone ×1
Power Handling Capacity 100 W
Impedance 4 Ω
Frequency Range 90 Hz to 20 000 Hz
Sound Pressure Level 76 dB/W·m
Dimensions (W ×H ×D) 92 mm ×99 mm ×95.5 mm
Mass 0.45 kg
Surround speakers (SP-THP3S) Type 1-Way Bass-Reflex Type
Speaker 6.5 cm cone ×1
Power Handling Capacity 40 W
Impedance 3 Ω
Frequency Range 90 Hz to 20 000 Hz
Sound Pressure Level 72 dB/W·m
Dimensions (W ×H ×D) 92 mm ×99 mm ×95.5 mm
Mass 0.48 kg each

1-4 (No.MB512)
SECTION 1
PRECAUTION
1.1 Safety Precautions
(1) This design of this product contains special hardware and
many circuits and components specially for safety purpos-
es. 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 per-
formed 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 manufacturers 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 products have
special safety-related characteristics. These characteris-
tics are often not evident from visual inspection nor can the
protection afforded by them necessarily be obtained by us-
ing replacement components rated for higher voltage, watt-
age, etc. Replacement parts which have these special
safety characteristics are identified in the Parts List of Ser-
vice Manual. Electrical components having such features
are identified by shading on the schematics and by ( ) on
the Parts List in the Service Manual. The use of a substitute
replacement which does not have the same safety charac-
teristics as the recommended replacement parts 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 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 reassem-
bling.
(5) Leakage shock hazard testing
After reassembling the product, always perform an isola-
tion check on the exposed metal parts of the product (an-
tenna 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 a
"Leakage Current Tester", measure the leakage current
from each exposed metal parts of the cabinet, particular-
ly any exposed metal part having a return path to the
chassis, to a known good earth ground. Any leakage cur-
rent 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, 1,000Ωper volt or more sensitivity
in the following manner. Connect a 1,500Ω10W resistor
paralleled by a 0.15µF AC-type capacitor between an ex-
posed 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
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 in the AC outlet and
repeat each measurement. Voltage measured any must
not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5
mA AC (r.m.s.).
1.2 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 maintained.
(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) If mains voltage selector is provided, check setting for local
voltage.
1.3 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 pre-
forming repair of this system.
1.4 Critical parts for safety
In regard with component parts appearing on the silk-screen
printed side (parts side) of the PWB diagrams, the parts that are
printed over with black such as the resistor ( ), diode ( )
and ICP ( ) or identified by the " " mark nearby are critical
for safety. When replacing them, be sure to use the parts of the
same type and rating as specified by the manufacturer.
(This regulation dose not Except the J and C version)
Good earth ground
Place this
probe on
each exposed
metal part.
AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)
1500 10W
0.15 F AC TYPE

(No.MB512)1-5
1.5 Preventing static electricity
Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser
diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.
1.5.1 Grounding to prevent damage by static electricity
Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as laser products.
Be careful to use proper grounding in the area where repairs are being performed.
(1) Ground the workbench
Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the
traverse unit (optical pickup) on it.
(2) Ground yourself
Use an anti-static wrist strap to release any static electricity built up in your body.
(3) Handling the optical pickup
• In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical
pickup are shorted. After replacement, return the shorted parts to their original condition.
(Refer to the text.)
• Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power source can easily
destroy the laser diode.
1.6 Handling the traverse unit (optical pickup)
(1) Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit.
(2) Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific details, refer to the
replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long a
time when attaching it to the connector.
(3) Handle the flexible cable carefully as it may break when subjected to strong force.
(4) I t is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.
1.7 Attention when traverse unit is decomposed
*Please refer to "Disassembly method" in the text for the pickup unit.
• Apply solder to the short land sections before the flexible wire is disconnected from the connecto on the servo board. (If the flexible
wire is disconnected without applying solder, the pickup may be destroyed by static electricity.)
• In the assembly, be sure to remove solder from the short land sections after connecting the flexible wire.
1M
Conductive material
(conductive sheet) or iron palate
(caption)
Anti-static wrist strap
Solder short

1-6 (No.MB512)
1.8 Important for laser products
1.9 Important for laser products
1.CLASS 1 LASER PRODUCT
2.DANGER : Invisible laser radiation when open and inter
lock failed or defeated. Avoid direct exposure to beam.
3.CAUTION : There are no serviceable parts inside the
Laser Unit. Do not disassemble the Laser Unit. Replace
the complete Laser Unit if it malfunctions.
4.CAUTION : The CD,MD and DVD player uses invisible
laser radiation and is equipped with safety switches which
prevent emission of radiation when the drawer is open and
the safety interlocks have failed or are defeated. It is
dangerous to defeat the safety switches.
5.CAUTION : If safety switches malfunction, the laser is able
to function.
6.CAUTION : Use of controls, adjustments or performance of
procedures other than those specified here in may result in
hazardous radiation exposure.
REPRODUCTION AND POSITION OF LABELS
!Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
CLASS 1
LASER PRODUCT
WARNING LABEL
CAUTION : VISIBLE AND / OR INVISIBLE CLASS 1M
LASER RADIATION WHEN OPEN.
DO NOT STARE INTO BEAM OR VIEW
DIRECTLY WITH OPTICAL INSTRUMENTS.
VARNING : SYNLIG OCH / ELLR OSYNLIG LASERSTRALING,
KLASS 1M, NAR DENNA DEL AR OPPNAD.
STIRRA EJ IN I STRALEN OCH BETRAKTA
EJ STRALEN MED OPTISKA INSTRUMENT.
ADVARSEL : SYNLIC OG / ELLER USYNLIG KLASSE
1M-LASERSTRALING VED ABNING.
SE IKKE IND I STRALEN-HELLER IKKE
MED OPTISKE INSTRUMENTER.
AVISO : RADIACION LASER DE CLASE 1M VISIBLE Y/O
INVISIBLE CUANDO ESTA ABIERTO.
NO MIRAR FIJAMENTE EL HAZ NI OBSERVAR
DIRECTAMENTE CON INSTRUMENTAL OPTICO.
ATTENTION : RAYONNEMENT LASER VISIBLE ET / OU INVISIBLE
DE CLASSE 1M UNE FOIS OUVERT.
NE PAS FIXER LE FAISCEAU NI REGARDER
DIRECTEMENT AVEC DES INSTRUMENTS OPTIQUES.
VARO! : AVAT TAESSA OLET ALT TIINA NAKYVALLE JA / TAI
NAKYMAT TOMALLE LUOKAN 1M LASERSATEILYLLE.
ALA KATSO SUORAAN SATEESEEN TAI TARKASTELE
SITA OPTISEN LAIT TEEN LAPI.

(No.MB512)1-7
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

1-8 (No.MB512)
SECTION 3
DISASSEMBLY
3.1 Main body
3.1.1 Removing the top cover
(See Fig.1 and 2)
(1) Remove the two screws Aattaching the top cover of both
side. (See Fig.1)
(2) Remove the five screws Battaching the top cover of rear
side. (See Fig.2)
Fig.1
Fig.2
A
B

(No.MB512)1-9
3.1.2 Removing the front panel assembly
(See fig.3 to 5)
(1) Remove the three screws Cattaching the front panel as-
sembly from bottom side. (See Fig.3)
(2) Remove the screw Dattaching the wire to power supply
board. (See Fig.5)
(3) Release the hook aof bottom side and hook bof both side
of front panel assembly. (See Fig.4 and 5)
Fig.3
Fig.4
Fig.5
C
a
b
D
CN101
CN421
CN422

1-10 (No.MB512)
3.1.3 Removing the power supply board
(See Fig.6)
CAUTION:
When remove the power supply board, do not touch the
capacitor (C905) because it keep voltage.
(1) Disconnect the parallel wires from connectors CN101,
CN421 and CN422 on the main board.
(2) Disconnect the power cord connector CN901 on the power
supply board.
(3) Remove the four screws Eattaching the power supply
board.
(4) Release the power supply board from fastener.
Fig.6
CN901
fastener
CN401
CN403
CN404
EE
E

(No.MB512)1-11
3.1.4 Removing the DVD mechanism assembly
(See Fig.7 and 8)
(1) Disconnect the card wires from connector CN405, CN411,
CN412, CN413 and CN414 of main board. (See Fig.7)
(2) Remove the two screws Fattaching the DVD mechanism
assembly from bottom cover. (See Fig.8)
(3) Press the hook cand slide out the DVD mechanism for di-
rection the arrow. (See Fig.8)
Fig.7
Fig.8
CN414
CN413
CN411
CN412
CN405
c
F