Clarion VRX575USB, QC-6825B-A Service Manual

- 1 -

VRX575USB

Clarion Co., Ltd.

7-2, Shintoshin, Chuo-Ku, Saitama-Shi, Saitama 330-0081 Japan
Service Dept.: 7-2, Shintoshin, Chuo-Ku, Saitama-Shi, Saitama 330-0081 Japan
Tel : [phone], FAX : [phone]

Service Manual

Model VRX575USB

(QC-6825B-A)

RADIO/DVD MULTIMEDIA CENTER

This product is a lead free model.
Lead free solder is used in PWB stamped LF mark.
Please keep the following conditions when you repair.

1. Use lead free solder.

2. Use a nitrogen solder system.

3. Do not use •gGeneral solder•h and •gLead free
solder•h together.

*

*

*

*

*

*

*

*

*

NOTES

LF

Published by Service Dept.
298-6507-00 Jan.2008
Printed in Korea

This DVD video player cannot play back DVD-Audio,
DVD-RAM, etc. This DVD player can play the following
discs. DVD video discs, Audio CDs.
This unit can play back CD-R/CD-RW, DVD-R/RW,
DVD+R/RW discs on which MP3/WMA music data have
been recorded. This unit is an ID3 Tag compatible model.
This unit supports the ID3 Tags of the version 2.4, 2.3, 1.1
and 1.0.
The DVD video system assigns a region number to DVD
Video players and DVD discs by sales area. The DVD
video region number is marked on the disc jacket.
DivX, DivX Certified, and associated logos are trademarks
of DivX Inc and are used under license.
This product includes technology owned by Microsoft
Corporation and cannot be used or distributed without a
License from MSLGP.
Windows Media , the Windows? logo are trademarks, or
registered trademarks of Microsoft Corporation in the
United States and/or other countries.
Manufactured under license from Dolby Laboratories.
"Dolby", "Pro Logic" and the double-D symbol are
trademarks of Dolby Laboratories.
iPod is for legal or rightholder-authorized copying only.
Don't steal music.
iPod is a trademark of Apple Computer, Inc., registered in
the U.S. and other countries.
This product incorporates copyright protection technology
that is protected by U.S. patents and other intellectual
property rights. Use of this copyright protection technology
must

be authorized by Macrovision, and is intended for home
and other limited viewing uses only unless otherwise
authorized by Macrovision. Reverse engineering or
disassembly is prohibited.
About USB memory
USB is an acronym for Universal Serial Bus, and refers
to an external bus standard supporting data transfer
rates of 12 Mbps.
This unit is compatible with USB 1.1/2.0 with maximum
data transfer rates of 12 Mbps.
USB memory devices that can be played by connecting
to the unit's USB cable are limited to those recognized as
"USB mass storage class devices"; operation is not
guaranteed with all USB memory devices.
Devices compatible with "USB Mass Storage Class" can
be used merely by connecting to the host device, without
need for special drivers or application software.
Consult the manufacturer of your USB memory device for
information regarding whether it is supported by "USB
Mass Storage Class" standards.
Audio files playable on this unit are limited to MP3/WMA
files.
This unit isn't compatible USB Card-Reader (SD).

SPECIFICATIONS

FM Tuner

Frequency range: 87.9MHz to 107.9MHz
Quieting sensitivity: 20dBf
Limiting sensitivity: 15dBf
Stereo separation: 20dB (1kHz)
Frequency response: 100Hz to 7kHz

AM Tuner

Frequency range: 530kHz to 1710kHz
Usable sensitivity: 40dBuV

DVD Player

System: Digital versatile disc system with

CDDA capable

Usable discs: DVD video disc, Compact disc

- 2 -

VRX575USB

COMPONENTS

1 Main unit #QC6825B-A H 1
2 Manuals 1
2-1. Owner's Manual & Instalation manuals

6311-682-101 1
2-2. Warrant'y card 6234-682-107 1
3 Power supply lead(For the main unit)

2141-682-005 1
4 RCA lead 2141-682-003 1
5 Bag for accessories of the main unit(No.1)

6131-682-003 1
5-1. Flathead screw(M5x8) 5612-350-080 4
5-2. Sems hexagonal bolt(M5x8) 5616-350-080 5
5-3 Electro tap 6459-682-001 1
5-4. Machine screw(M4x3) 5616-340-030 4
6 Bag for accessories of the main unit(No.2)

6131-682-003 1
6-1. Hook plate 5229-682-002 2
6-2. Cord clamp 2179-000-001 1
7 Universal mounting bracket 5229-682-001 1
8 Remote control unit 6425-682-001 1
9 Bag for accessories 6131-682-005 1
9-1. Battery(SMU-4) 2211-000-001 1
10 Outher Escutcheon 5189-682-001 1
11 DCP Case 5119-682-001 1

Frequency response: 17Hz to 20kHz(CD)(+3/-3dB)
Separation: 60dB
Distortion: 0.5%

MP3 / WMA

Sampling rate: MPEG1 44.1kHz/48kHz/32kHz

MPEG2 22.05kHz/24kHz/16kHz

Bit rate: MPEG1 32kbps to 320kbps

MPEG2 8kbps to 160kbps
(VBR)

Logical Format: ISO9660 level1, 2

JOLIET or Romeo

Audio Amplifier

Maximum power output: 50W x 4ch

LCD Monitor

Screen size: 7-inch wide type

154.0mm Width X 86.6mm Height
Display method: Transmission type TN QVGA TFT LCD
Drive method: TFT(thin-film transistor)

active matrix driving

Pixels: 336,960 (1440 x 234)

General

Power source voltage: 14.4V DC

(10.8 to 15.6V allowable)
Ground: Negative
Current consumption: 4.0A(1W)
Auto antenna rated current: 500mA less
Dimension of the Main Unit: 178mm (W) x 50mm (H) x 160mm (D)
Weight of the Main Unit: 2.5kg
Dimension of the Remote Control Unit:

53mm(W) x 21mm (H) x 165mm (D)
Weight of the Remote control Unit:90g (including battery)

CAUTIONS

Use of controls, adjustment or performance of procedures
other than those specified herein, may result in hazardous
radiation exposure.
The compact disc player should not be adjusted or repaired by
anyone except properly qualified service personnel.

- 3 -

VRX575USB

COMPONENTS

For details, see the attached file "Components.pdf "

TO ENGINEERS IN CHARGE OF REPAIR
OR INSPECTION OF OUR PRODUCTS

Before repair or inspection, make sure to follow the instructions
so that customers and engineers in charge of repair or
inspection can avoid suffering any risk or injury.

1.

2.

3.

4.

5.

6.

7.

8.

9.

Use specified parts.
The system uses parts with special safety features
against fire and voltage. Use only parts with equivalent
characteristics when replacing them. The use of
unspecified parts shall be regarded as remodeling for
which we shall not be liable. The onus of product liability
(PL) shall not be our responsibility in cases where an
accident or failure is as a result of unspecified parts being
used.
Place the parts and wiring back in their original
positions after replacement or re-wiring.
For proper circuit construction, use of insulation tubes,
bonding, gaps to PWB, etc, is involved. The wiring
connection and routing to the PWB are specially planned
using clamps to keep away from heated and high voltage
parts. Ensure that they are placed back in their original
positions after repair or inspection. If extended damage is
caused due to negligence during repair, the legal
responsibility shall be with the repairing company.
Check for safety after repair.
Check that the screws, parts and wires are put back
securely in their original position after repair. Ensure for
safety reasons there is no possibility of secondary
problems around the repaired spots. If extended damage
is caused due to negligence of repair, the legal
responsibility shall be with the repairing company.
Caution in removal and making wiring connection to
the parts for the automobile.
Disconnect the battery terminal after turning the ignition
key off. If wrong wiring connections are made with the
battery connected, a short circuit and/or fire may occur. If
extensive damage is caused due to negligence of repair,
the legal responsibility shall be with the repairing
company.
Cautions in soldering
Please do not spread liquid flux in soldering. Please do
not wash the soldering point after soldering.
Cautions in soldering for chip capacitors
Please solder the chip capacitors after pre-heating for
replacement because they are very weak to heat. Please
do not heat the chip capacitors with a soldering iron
directly.
Cautions in handling for chip parts.
Do not reuse removed chips even when no abnormality is
observed in their appearance. Always replace them with
new ones. (The chip parts include resistors, capacitors,
diodes, transistors, etc). Please make an operation test
after replacement.
Cautions in handling flexible PWB
Before working with a soldering iron, make sure that the
iron tip temperature is around 270. Take care not to apply
the iron tip repeatedly(more than three times)to the same
patterns. Also take care not to apply the tip with force.
Turn the unit OFF during disassembly and parts
replacement.
Recheck all work before you apply power to the unit.

10.

11.

11-1.

11-2.

11-3.

Cautions in checking that the optical pickup lights
up.
The laser is focused on the disc reflection surface
through the lens of the optical pickup. When checking
that the laser optical diode lights up, keep your eyes
more than 30cms away from the lens. Prolonged
viewing of the laser within 30cms may damage your
eyesight.
Cautions in handling the optical pickup
The laser diode of the optical pickup can be damaged
by electrostatic charge caused by your clothes and
body. Make sure to avoid electrostatic charges on your
clothes or body, or discharge static electricity before
handling the optical pickup.
Laser diode
The laser diode terminals are shorted for transportation
in order to prevent electrostatic damage. After
replacement, open the shorted circuit. When removing
the pickup from the mechanism, short the terminals by
soldering them to prevent this damage.
Actuator
The actuator has a powerful magnetic circuit. If a
magnetic material is put close to it, Its characteristics will
change. Ensure that no foreign substances enter
through the ventilation
slots in the cover.
Cleaning the lens
Dust on the optical lens affects performance. To clean
the lens, apply a small amount of isopropyl alcohol to
lens paper and wipe the lens gently.

METHOD FOR FIRMWARE VERSION
IDENTIFYING

1. Main micom & media firmware

- 3 -

VRX575USB

COMPONENTS

For details, see the attached file "Components.pdf "

TO ENGINEERS IN CHARGE OF REPAIR
OR INSPECTION OF OUR PRODUCTS

Before repair or inspection, make sure to follow the instructions
so that customers and engineers in charge of repair or
inspection can avoid suffering any risk or injury.

1.

2.

3.

4.

5.

6.

7.

8.

9.

Use specified parts.
The system uses parts with special safety features
against fire and voltage. Use only parts with equivalent
characteristics when replacing them. The use of
unspecified parts shall be regarded as remodeling for
which we shall not be liable. The onus of product liability
(PL) shall not be our responsibility in cases where an
accident or failure is as a result of unspecified parts being
used.
Place the parts and wiring back in their original
positions after replacement or re-wiring.
For proper circuit construction, use of insulation tubes,
bonding, gaps to PWB, etc, is involved. The wiring
connection and routing to the PWB are specially planned
using clamps to keep away from heated and high voltage
parts. Ensure that they are placed back in their original
positions after repair or inspection. If extended damage is
caused due to negligence during repair, the legal
responsibility shall be with the repairing company.
Check for safety after repair.
Check that the screws, parts and wires are put back
securely in their original position after repair. Ensure for
safety reasons there is no possibility of secondary
problems around the repaired spots. If extended damage
is caused due to negligence of repair, the legal
responsibility shall be with the repairing company.
Caution in removal and making wiring connection to
the parts for the automobile.
Disconnect the battery terminal after turning the ignition
key off. If wrong wiring connections are made with the
battery connected, a short circuit and/or fire may occur. If
extensive damage is caused due to negligence of repair,
the legal responsibility shall be with the repairing
company.
Cautions in soldering
Please do not spread liquid flux in soldering. Please do
not wash the soldering point after soldering.
Cautions in soldering for chip capacitors
Please solder the chip capacitors after pre-heating for
replacement because they are very weak to heat. Please
do not heat the chip capacitors with a soldering iron
directly.
Cautions in handling for chip parts.
Do not reuse removed chips even when no abnormality is
observed in their appearance. Always replace them with
new ones. (The chip parts include resistors, capacitors,
diodes, transistors, etc). Please make an operation test
after replacement.
Cautions in handling flexible PWB
Before working with a soldering iron, make sure that the
iron tip temperature is around 270. Take care not to apply
the iron tip repeatedly(more than three times)to the same
patterns. Also take care not to apply the tip with force.
Turn the unit OFF during disassembly and parts
replacement.
Recheck all work before you apply power to the unit.

10.

11.

11-1.

11-2.

11-3.

Cautions in checking that the optical pickup lights
up.
The laser is focused on the disc reflection surface
through the lens of the optical pickup. When checking
that the laser optical diode lights up, keep your eyes
more than 30cms away from the lens. Prolonged
viewing of the laser within 30cms may damage your
eyesight.
Cautions in handling the optical pickup
The laser diode of the optical pickup can be damaged
by electrostatic charge caused by your clothes and
body. Make sure to avoid electrostatic charges on your
clothes or body, or discharge static electricity before
handling the optical pickup.
Laser diode
The laser diode terminals are shorted for transportation
in order to prevent electrostatic damage. After
replacement, open the shorted circuit. When removing
the pickup from the mechanism, short the terminals by
soldering them to prevent this damage.
Actuator
The actuator has a powerful magnetic circuit. If a
magnetic material is put close to it, Its characteristics will
change. Ensure that no foreign substances enter
through the ventilation
slots in the cover.
Cleaning the lens
Dust on the optical lens affects performance. To clean
the lens, apply a small amount of isopropyl alcohol to
lens paper and wipe the lens gently.

METHOD FOR FIRMWARE VERSION
IDENTIFYING

1. Main micom & media firmware

- 3 -

VRX575USB

COMPONENTS

For details, see the attached file "Components.pdf "

TO ENGINEERS IN CHARGE OF REPAIR
OR INSPECTION OF OUR PRODUCTS

Before repair or inspection, make sure to follow the instructions
so that customers and engineers in charge of repair or
inspection can avoid suffering any risk or injury.

1.

2.

3.

4.

5.

6.

7.

8.

9.

Use specified parts.
The system uses parts with special safety features
against fire and voltage. Use only parts with equivalent
characteristics when replacing them. The use of
unspecified parts shall be regarded as remodeling for
which we shall not be liable. The onus of product liability
(PL) shall not be our responsibility in cases where an
accident or failure is as a result of unspecified parts being
used.
Place the parts and wiring back in their original
positions after replacement or re-wiring.
For proper circuit construction, use of insulation tubes,
bonding, gaps to PWB, etc, is involved. The wiring
connection and routing to the PWB are specially planned
using clamps to keep away from heated and high voltage
parts. Ensure that they are placed back in their original
positions after repair or inspection. If extended damage is
caused due to negligence during repair, the legal
responsibility shall be with the repairing company.
Check for safety after repair.
Check that the screws, parts and wires are put back
securely in their original position after repair. Ensure for
safety reasons there is no possibility of secondary
problems around the repaired spots. If extended damage
is caused due to negligence of repair, the legal
responsibility shall be with the repairing company.
Caution in removal and making wiring connection to
the parts for the automobile.
Disconnect the battery terminal after turning the ignition
key off. If wrong wiring connections are made with the
battery connected, a short circuit and/or fire may occur. If
extensive damage is caused due to negligence of repair,
the legal responsibility shall be with the repairing
company.
Cautions in soldering
Please do not spread liquid flux in soldering. Please do
not wash the soldering point after soldering.
Cautions in soldering for chip capacitors
Please solder the chip capacitors after pre-heating for
replacement because they are very weak to heat. Please
do not heat the chip capacitors with a soldering iron
directly.
Cautions in handling for chip parts.
Do not reuse removed chips even when no abnormality is
observed in their appearance. Always replace them with
new ones. (The chip parts include resistors, capacitors,
diodes, transistors, etc). Please make an operation test
after replacement.
Cautions in handling flexible PWB
Before working with a soldering iron, make sure that the
iron tip temperature is around 270. Take care not to apply
the iron tip repeatedly(more than three times)to the same
patterns. Also take care not to apply the tip with force.
Turn the unit OFF during disassembly and parts
replacement.
Recheck all work before you apply power to the unit.

10.

11.

11-1.

11-2.

11-3.

Cautions in checking that the optical pickup lights
up.
The laser is focused on the disc reflection surface
through the lens of the optical pickup. When checking
that the laser optical diode lights up, keep your eyes
more than 30cms away from the lens. Prolonged
viewing of the laser within 30cms may damage your
eyesight.
Cautions in handling the optical pickup
The laser diode of the optical pickup can be damaged
by electrostatic charge caused by your clothes and
body. Make sure to avoid electrostatic charges on your
clothes or body, or discharge static electricity before
handling the optical pickup.
Laser diode
The laser diode terminals are shorted for transportation
in order to prevent electrostatic damage. After
replacement, open the shorted circuit. When removing
the pickup from the mechanism, short the terminals by
soldering them to prevent this damage.
Actuator
The actuator has a powerful magnetic circuit. If a
magnetic material is put close to it, Its characteristics will
change. Ensure that no foreign substances enter
through the ventilation
slots in the cover.
Cleaning the lens
Dust on the optical lens affects performance. To clean
the lens, apply a small amount of isopropyl alcohol to
lens paper and wipe the lens gently.

METHOD FOR FIRMWARE VERSION
IDENTIFYING

1. Main micom & media firmware

- 3 -

VRX575USB

COMPONENTS

For details, see the attached file "Components.pdf "

TO ENGINEERS IN CHARGE OF REPAIR
OR INSPECTION OF OUR PRODUCTS

Before repair or inspection, make sure to follow the instructions
so that customers and engineers in charge of repair or
inspection can avoid suffering any risk or injury.

1.

2.

3.

4.

5.

6.

7.

8.

9.

Use specified parts.
The system uses parts with special safety features
against fire and voltage. Use only parts with equivalent
characteristics when replacing them. The use of
unspecified parts shall be regarded as remodeling for
which we shall not be liable. The onus of product liability
(PL) shall not be our responsibility in cases where an
accident or failure is as a result of unspecified parts being
used.
Place the parts and wiring back in their original
positions after replacement or re-wiring.
For proper circuit construction, use of insulation tubes,
bonding, gaps to PWB, etc, is involved. The wiring
connection and routing to the PWB are specially planned
using clamps to keep away from heated and high voltage
parts. Ensure that they are placed back in their original
positions after repair or inspection. If extended damage is
caused due to negligence during repair, the legal
responsibility shall be with the repairing company.
Check for safety after repair.
Check that the screws, parts and wires are put back
securely in their original position after repair. Ensure for
safety reasons there is no possibility of secondary
problems around the repaired spots. If extended damage
is caused due to negligence of repair, the legal
responsibility shall be with the repairing company.
Caution in removal and making wiring connection to
the parts for the automobile.
Disconnect the battery terminal after turning the ignition
key off. If wrong wiring connections are made with the
battery connected, a short circuit and/or fire may occur. If
extensive damage is caused due to negligence of repair,
the legal responsibility shall be with the repairing
company.
Cautions in soldering
Please do not spread liquid flux in soldering. Please do
not wash the soldering point after soldering.
Cautions in soldering for chip capacitors
Please solder the chip capacitors after pre-heating for
replacement because they are very weak to heat. Please
do not heat the chip capacitors with a soldering iron
directly.
Cautions in handling for chip parts.
Do not reuse removed chips even when no abnormality is
observed in their appearance. Always replace them with
new ones. (The chip parts include resistors, capacitors,
diodes, transistors, etc). Please make an operation test
after replacement.
Cautions in handling flexible PWB
Before working with a soldering iron, make sure that the
iron tip temperature is around 270. Take care not to apply
the iron tip repeatedly(more than three times)to the same
patterns. Also take care not to apply the tip with force.
Turn the unit OFF during disassembly and parts
replacement.
Recheck all work before you apply power to the unit.

10.

11.

11-1.

11-2.

11-3.

Cautions in checking that the optical pickup lights
up.
The laser is focused on the disc reflection surface
through the lens of the optical pickup. When checking
that the laser optical diode lights up, keep your eyes
more than 30cms away from the lens. Prolonged
viewing of the laser within 30cms may damage your
eyesight.
Cautions in handling the optical pickup
The laser diode of the optical pickup can be damaged
by electrostatic charge caused by your clothes and
body. Make sure to avoid electrostatic charges on your
clothes or body, or discharge static electricity before
handling the optical pickup.
Laser diode
The laser diode terminals are shorted for transportation
in order to prevent electrostatic damage. After
replacement, open the shorted circuit. When removing
the pickup from the mechanism, short the terminals by
soldering them to prevent this damage.
Actuator
The actuator has a powerful magnetic circuit. If a
magnetic material is put close to it, Its characteristics will
change. Ensure that no foreign substances enter
through the ventilation
slots in the cover.
Cleaning the lens
Dust on the optical lens affects performance. To clean
the lens, apply a small amount of isopropyl alcohol to
lens paper and wipe the lens gently.

METHOD FOR FIRMWARE VERSION
IDENTIFYING

1. Main micom & media firmware

- 4 -

VRX575USB

2. DVD firmware

- 4 -

VRX575USB

2. DVD firmware

- 4 -

VRX575USB

2. DVD firmware

- 4 -

VRX575USB

2. DVD firmware

ADJUSTMENT

1.

2.

LCD Section
Confirm the power supply voltage. Input signal : 10-steps
wave It measures with an oscilloscope.
VCOM-DC Check

- Confirm the TPAC voltage is peak to peak 5.6V.

- If TPAC voltage isn't peak to peak 5.6V, adjust R66
and adjust R68 so that between R66 and C72 voltage is

-1.1V to center.

Radio Section
Confirm the power supply voltage. Input signal : 10-steps
wave It measures with an oscilloscope, signal generator
and so on.
Adjustments S-meter
Set SG output to 25dBuV/emf. Adjust R58 so that TP130
voltage is 2V.
Adjustments FM SD

- After 2-1 process, connect a probe of oscilloscope to
pin22 of the tuner first.

- Connect 5.6Kohm to the space between pin25 and
pin20 of the tuner.

- Set SG output to 28dBV/emf and frequency to 98.0MHz
or 98.1MHz.

- Adjust FM SD of the tuner pack(CET-8400) for making
the waveform displayed on oscilloscope to HI and
horizontal.(Refer to the below figure.)

- Finally reject 5.6Kohm connected between pin25 and
pin20 of the tuner.

- Finally reject 5.6Kohm connected between pin25 and
pin20 of the tuner.
Adjustments AM SD

- After 2-1 process, connect an probe of oscilloscope to
pin22 of the tuner first.

- Connect 5.6Kohm to the space between pin25 and
pin20 of the tuner.

- Set SG output to 33dBV/emf and frequency to 999KHz
or 1000KHz.

- Adjust AM SD of the tuner pack(CET-8400) for making
the waveform displayed on oscilloscope to HI and
horizontal. (Refer to the above figure.)

- Finally reject 5.6Kohm connected between pin25 and
pin20 of the tuner.

- 5 -

VRX575USB

EXPLANATION OF IC

uPD78F1165 Main system controller

- 6 -

VRX575USB

ELECTRICAL CONNECTION

1. Wire Connection

- 7 -

VRX575USB

TROUBLESHOOTING

1.

2.

3.

4.

1. NO POWER ON

NO POWER

No Power ON

- No power

- No operating the key

No Sound

- Power on, No sound all of source

- Power on, No sound SP only all of source

- Power on, No sound AMP only all of source

- Operating radio, No sound voice only of radio

- Operating CD/DVD, No sound only

- No operation visual sound

- Operating iPod voice, No sound only

- Operating USB voice, No sound only

No Operating Tuner

- No operating radio

- Operating radio, No stopping SEEK & Bad receiving
condition

No Display

- No display the image

- No display the composite image

- No switch on LCD back light

5.

6.

7.

8.

9.

No Control Switch

- No operating remote control

- No switch on LED

- No display RGB image

No Operating CD/DVD

- No loading CD/DVD, No eject

- CD or DVD is loaded, ejected & No playing normally

No Operating iPod

- No operating iPod

- No change with iPod

No Operating Slide Mechanism

- No operating slide mechanism

General and DVD player

NO POWER

OK

NG

NG

NG

NG

NG

NG

NG

NG

OK

OK

OK

OK

OK

OK

Check

Emitter of Q40

(14V)

Problem extension filter box,

connector

Check

Collector of Q40

(12V)

Check

12V stabilization circuit

Q40, R23, R44, R315, R411

Check

the oscillation of

Y5

Check

RESET

normally

Check

out of Q54

Check
B/U DET
normally

Problem of

RESET circuit line,

Q17, U8, D1, D28

Check

12V stabilization circuit

Q40, R23, R44, R315, R411

Problem of

B/D_DET circuit line,

Q54, D53, R201

Check

ACC_CHK circuit

line normally

Confirm to

Y5, U5

Problem of

ACC_CHK circuit line,

Q1, Q28, D21, D3

Check

FR_DET circuit line

normally

Problem of
FR_DET circuit line,
J13, Q42, U5, R103

Check

the oscillation of

Y3

Confirm to

U5, writing software

NG

Problem of

of Y3, U5

- 8 -

VRX575USB

NO POWER

NO POWER

OK

NG

NG

OK

Check

the point of

contact of SW

Problem of SW

Problem of flat wire, J13

Check

5V, AD1-2, RESET,

OPEN/CLOSE

of J13

Check U5

2. NO SOUND

Power on, No sound all of source

POWER on

NO sound all of source

NG

NG

NG

OK

OK

OK

OK

Check

VCC of U1

Problem of

9V stabilization circuit D19, D75,

C99

Check

PIN1-10 of U1

Problem of input line circuit

Problem of U5

Problem of mute line

Check

EV_DA, EV_CLK

circuit line

Check

PIN15 of U1

Imperfect of U1

NG

Power on, No sound SP only all of source

POWER on,

NO sound SP only

all of source

NG

NG

NG

OK

OK

OK

Check

AMP_ON, AMP_MUTE

normally

Problem of

AMP_ON, AMP_MUTE circuit

line

Check

the input signal

of U80

Problem of input line circuit

Problem of U5

Check

EV_DA, EV_CLK

circuit line

Imperfect of U1

Power on, No sound AMP only all of source

POWER on,

NO sound AMP only

all of source

NG

NG

NG

OK

OK

OK

Check

the connection

of J2

Problem of

the connection of

J2

Check

the out signal

of U1

Problem of U1

Problem of

LINE_FL/R,LINE_NF_L/R,LINER

L/R, LINE_SUB_L/R circuit line,

U10, U11, U13, U28

Check

input signal

line of J2

Check

the connection of J2

Operation radio, No sound voice only of radio

Operating radio,

NO sound voice only

of radio

NG

OK

Check

L_CH, R_CH Of TUNER1

normally

Problem of

TUNER1

Check

circuit of U1

- 9 -

VRX575USB

Operating CD/DVD, No sound only

Operating CD/DVD,

No sound only

OK

NG

NG

OK

Check

the connection of

J3

Problem of

DVD mechanism,

flexible pwb, j3

Problem of

circuit line, U21, U1

Check

DVD_L/R circuit

line, U21

Imperfect of U5

Operating USB voice, No sound only

Operating USB voice,

No sound only

OK

NG

NG

OK

Check

the connection

of USB

Problem of

the connection of iPod,

connector

Problem of

U32, U7, U1, U80

Check

USB circuit line,

J5, U7

Imperfect of U7

Operating AUX, No sound only

Operating AUX,

No sound only

OK

NG

NG

OK

Check

the connection of

J2

Problem of

the connection of RCA,

connector

Problem of

U1, U80

Check

the voice input of

U1

Imperfect of U80

Operating iPod voice, No sound only

Operating iPod voice,

No sound only

OK

NG

NG

OK

Check

the connection

of iPod

Problem of

the connection of

iPod, J2, J5

Problem of

U32, U7, U1, U80

Check

iPod_LIN, iPod_RIN

circuit line, U32

Imperfect of U7

3. NO OPERATING TUNER

No operating radio

No operating radio

NG

NG

NG

OK

OK

OK

OK

Check

emitter of Q10

Problem of

Q10, L3

Check

SD/ST_IND,S-META

of TUNER1

Problem of input line circuit

Problem of U5

Problem of U4

Check

PLL_CLK,PLL_DATA,

PLL_CE of U5

Check

PLL_CLK,PLL_DATA,

PLL_CE of U4

Imperfect of U5

NG

- 10 -

VRX575USB

Power on, No sound SP only all of source

Operating radio,

No stopping SEEK

Bad receiving condition

NG

NG

NG

OK

OK

OK

Check

the protection

of ANT1

Problem of

the connection of ANT1

Check

SD/ST_IND, S-META of

TUNER1

Problem of TUNER1

Problem of Q67, Q63

Check
emitter of
Q67, Q63

Imperfect of TUNER1

NG

OK

Problem of

U4, U40,Q10,Q12,Q13

Check

the reading of

parameter

NG

OK

Read adjustment

Check

the adjustment point of

parameter

4. NO DISPLAY

No display image

No display the image

NG

NG

NG

OK

OK

Check

the panel section

Problem of

U1 TW8806

(LCD PWB Section)

Check

DVD mechanism

Problem of DVD mechanism

Problem of the power supply 5V

Problem of touch_5V circuit line

Problem of Q35, Q36

Check

the power supply of

LCD

Imperfect of TUNER1

NG

OK

Problem of the power

Of LCD

Check the

power supply to touch

panel micom

OK

No switch on LCD back light

No display the image

NG

NG

NG

OK

OK

Check the panel section

Check DVD mechanism

Problem of the connection of J8

Check

the connection of J8

Problem of U5

OK

Problem of

LCD PANEL

Problem of DVD mechanism

position DET

5. NO CONTROL SWITCH

No operating remote control

No operating remote control

NG

NG

OK

OK

Check the

touch_5V circuit line

Check the

REMOCON circuit line

of Q35, Q36

Problem of U2,U3

No display the composite image

No display the

composite image

OK

NG

NG

OK

Check the panel

section

Check the image

output of REAR

Problem of U1

Problem of the starting point of

the image output

Problem of U2, U3

- 11 -

VRX575USB

No switch on LED

No switch on LED

NG

Problem of Q42

Check the operating

of Q42

Replace LED

NG

Problem of touch_5V circuit line

Check of

the connection

of J13

OK

OK

No display RGB image

No display TW8806 image

NG

Problem of VDD5V Circuit line

Check

VDD5V Circuit line

Q1, CON1

Imperfect of U1 (TW8806)

NG

Problem of U1(TW8806)

Check the composite

image

OK

NG

Problem of VDD9V Circuit line

Check

VDD9V Circuit line

U2

OK

NG

Problem of Q7, Q8, Q9

Check

RGB output of

Q7,Q8,Q9

OK

OK

6. NO OPERATING CD/DVD

No loading CD/DVD No eject

No loading CD/DVD No eject

NG

Problem of DVD mechanism

(detective parts)

Escutcheon section

Check

the disc detective

Imperfect of DVD mechanism

NG

Problem of U24

check of U24

DVD(8V)

OK

NG

Problem of DVD mechanism

Escutcheon section

Check

eject the disc

normally

OK

NG

Problem of DVD mechanism

(loading part)

Check

stopping in the time-out

on the way

OK

OK

CD or DVD is loaded, ejected No playing normally

CD or DVD is loaded, ejected

No playing normally

NG

Problem of DVD mechanism

(detective parts)

Escutcheon section

Check

the disc detective

Imperfect of DVD mechanism

NG

Problem of U24

check

the disc normally

OK

NG

Problem of DVD mechanism

Escutcheon section

Check

eject the disc

normally

OK

NG

Problem of DVD mechanism

(loading part)

Check

stopping in the time-out

on the way

OK

OK

- 12 -

VRX575USB

7. No operating iPod

No operating iPod

NO operating iPod

NG

Check the cable

connection

Problem of U7, Y6

NG

Problem of iPod software

Problem of the cable J5

Problem of Y6, U15, U29

Check operating

iPod only

OK

NG

Check of U7

(PIN 62,63)

OK

OK

8. NO OPERATIONG SLIDE MECHANSIM

No operating Slide mechanism

9. General and DVD player

No operating Slide mechanism

NG

Confirm the horizontally

position

Defective of Sub PWB

NG

Confirm lack and bite of a gear

calibration of horizontally position

Defective of Q40

Confirm Irregularity

operating

OK

NG

Voltage Check MOTOR

10V Line, Q5

OK

OK

No charge with iPod

No charge with iPod

Problem of Q43, Q49, U39

NG

Problem of the cable J5

Check the cable

connection

OK

- 13 -

VRX575USB

EXPLODED VEIW / PARTS LIST

- 14 -

VRX575USB

ELECTRICAL PART LIST

- 15 -

VRX575USB

- 16 -

VRX575USB

- 17 -

VRX575USB

- 18 -

VRX575USB

- 19 -

VRX575USB

- 20 -

VRX575USB

BLOCK DIAGRAM

VRX-575USB

Block Diagram

- 21 -

VRX575USB

- 22 -

VRX575USB

- 23 -

VRX575USB

- 24 -

VRX575USB

- 25 -

VRX575USB

- 26 -

VRX575USB

- 27 -

VRX575USB

- 28 -

VRX575USB

- 29 -

VRX575USB

- 30 -

VRX575USB

- 31 -

VRX575USB

- 32 -

VRX576USB

- 33 -

VRX575USB