JVC KVM-706, KVM-705 Service manual

MA209200510

SERVICE MANUAL

IN-DASH 7-INCH WIDESCREEN MONITOR

KV-M705,KV-M706

KV-M705

Area suffix

E ------------- Southern Europe
UT ------------------------- Taiwan
UN --------------------- Indonesia
HUN ------------------ Indonesia
U -------------------- Other Areas

KV-M706

Area suffix

J ------------- Northern America
E ------------- Southern Europe
UT ------------------------- Taiwan
UN --------------------- Indonesia
U -------------------- Other Areas

Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)

TABLE OF CONTENTS

1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14

COPYRIGHT © 2005 Victor Company of Japan, Limited

No.MA209

2005/10

SPECIFICATION

Screen 7 inch liquid crystal panel

Number of pixel 336 960 pixels (480 vertical × 234 horizontal × 3)

Drive method TFT (Thin Film Transistor) active matrix format

Color system NTSC/PAL

Input Video RCA pin × 2 circuits 1 V(p-p), 75 Ω

Audio RCA pin × 2 circuits 1.5 V(rms)

Output Video RCA pin × 1 circuit 1 V(p-p), 75 Ω

Audio RCA pin × 1 circuit 1.5 V(rms)

Other terminal AV bus (AV BUS)

Power requirement Operating voltage DC 14.4 V (11 V to 16 V allowance)

Grounding system Negative ground

Allowable operating temperature 0°C to +40°C (32°F to 104°F)
Allowable storage temperature -10°C to +60°C (14°F to 140°F)
Dimensions (W × H × D) Installation size (approx.) With sleeve-mounting plate Type B (standard)

: 182 mm × 52 mm × 165 mm (7-3/16 in. × 2-1/16 in. × 6-1/2 in.)

With sleeve-mounting plate Type A

: 182 mm × 52 mm × 160 mm (7-3/16 in. × 2-1/16 in. × 6-5/16 in.)

Panel size (approx.) 188 mm × 58 mm × 14 mm (7-7/16 in. × 2-5/16 in. × 5/8 in.)

Mass (approx.) 1.6 kg (3.6 lbs)

Design and specifications are subject to change without notice.

1-2 (No.MA209)

1.1 Safety Precautions

SECTION 1

PRECAUTION

!

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.

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

(No.MA209)1-3

SECTION 3

DISASSEMBLY

3.1 Main body section

3.1.1 Removing the front assembly
(See Figs.1 to 3)

(1) From the both sides of the main body, remove the two

screws A attaching the front assembly to the main body.
(See Fig.1.)

(2) From the bottom side of the main body, release the two

claws a attaching the front assembly to the main body.

(See Fig.2.)
(3) Take out the front assembly forward from the main body.
(4) Lift up the lock lever of the connector CN471

key board and disconnect the card wire from it. (See Fig.3.)

on the front

A A

Front assembly

Fig.1

Fig.2

Card wire

Fig.3

CN471

Front assemblyClaws a

Front assemblyFront key board

1-4 (No.MA209)

3.1.2 Removing the top drive unit
(See Figs.4 to 6)

• Prior to performing the following procedure, remove the front

assembly.
(1) From the both sides of the main body, remove the four

screws B attaching the top drive unit to the main body. (See
Fig.4.)

(2) From the back side of the main body, remove the three

screws C attaching the top drive unit to the main body. (See
Fig.5.)

(3) From the top side of the main body, lift the top drive unit

from the bottom case assembly.

(4) Lift up the lock lever of the connectors (CN391

on the system control board and disconnect the flexible
wires from it. (See Fig.6.)

(5) Take out the top drive unit from the bottom case assembly.

and CN392)

Top drive unit

B

B

Top case assembly

Fig.4

Top drive unit

Flexible wires

CC

Fig.5

Top drive unit

Fig.6

CN391CN392

System control boardBottom case assembly

(No.MA209)1-5

3.1.3 Removing the LCD assembly
(See Figs.7 to 10)

• Prior to performing the following procedures, remove the front

assembly and top drive unit.
(1) From the top side of the top drive unit, remove the three

screws D attaching the LCD assembly to the top drive unit.
(See Fig.7.)

(2) From the bottom side of the top drive unit, remove the two

screws E attaching the FPC guide and take out it. (See
Fig.8.)

(3) Move the LCD assembly in the direction of the arrow by

turning the feed gear. (See Fig.8.)

(4) From the top side of the top drive unit, remove the screw D

attaching the LCD assembly to the top drive unit. (See
Fig.9.)

(5) Take out the LCD assembly from the top drive unit.

Reference:

• When reattaching the LCD assembly, pass the flexible wire
through the slot c of the mecha assembly as before. (See
Fig.10.)

• When reattaching the FPC guide, pass it through the section
b as before. (See Fig.8.)

LCD assembly

D

Bottom case assembly

Fig.9

Bottom case assembly

LCD assembly Section b

Feed gear

1-6 (No.MA209)

Fig.7

Fig.8

D

FPC guide

E

Section b

LCD assembly

Slot c

Fig.10

3.1.4 Removing the display rear cover
(See Fig.11)

• Prior to performing the following procedures, remove the front

assembly, top drive unit and LCD assembly.
(1) From the back side of the LCD assembly, remove the three

screws F attaching the display rear cover to the LCD as­sembly.

(2) Take out the display rear cover from the LCD assembly.

3.1.5 Removing the display back panel
(See Figs.12 and 13)

• Prior to performing the following procedures, remove the front

assembly, top drive unit, LCD assembly and display rear cov­er.
(1) From the back side of the LCD assembly, remove the two

screws G attaching the display back panel to the LCD as­sembly. (See Fig.12.)

(2) From the both sides of the LCD assembly, remove the six

screws H attaching the display back panel to the LCD as­sembly. (See Fig.13.)

(3) Take out the display back panel from the LCD assembly.

F

Display rear cover

Fig.11

G

Display back panel

H

Display back panel

Fig.12

Display back panel

H

Fig.13

(No.MA209)1-7

3.1.6 Removing the monitor board
(See Fig.14)

• Prior to performing the following procedures, remove the front

assembly, top drive unit, LCD assembly, display rear cover
and display back panel.
(1) From the back side of the LCD assembly, remove the three

screws J attaching the monitor board to the LCD assembly.

(2) Disconnect the wires from the connectors (CN791

on the monitor board.

(3) Take out the monitor board with the insulator.

Reference:

• When attaching the screw J, attach it with the ground spring.

• After connecting the wire to the connector CN851
the new tape.

, CN851)

, fix it with

Ta pe

CN851

J

3.1.7 Removing the LCD module
(See Fig.15)

• Prior to performing the following procedures, remove the front

assembly, top drive unit, LCD assembly, display rear cover,
display back panel and monitor board.
(1) From the back side of the LCD assembly, release the four

section d attaching the LCD module while lifting up the LCD
module.

(2) Take out the LCD module from the LCD assembly.

Reference:

When releasing the LCD module, take care not to break it.

3.1.8 Removing the rear bracket
(See Fig.16)

• Prior to performing the following procedures, remove the front

assembly and top drive unit.
(1) From the back side of the bottom case assembly, remove

the six screws K attaching the rear bracket to the bottom
case assembly.

(2) Take out the rear bracket from the bottom case assembly.

K

CN791

Monitor board

Fig.14

Fig.15

J

Ground spring

LCD moduleSection d

Rear bracket

1-8 (No.MA209)

Fig.16

3.1.9 Removing the system control board

(See Fig.17)

• Prior to performing the following procedures, remove the front

assembly, top drive unit and rear bracket.
(1) From the top side of the bottom case assembly, remove the

five screws M attaching the system control board to the bot­tom case assembly.

(2) Disconnect the wire from the connector CN351

tem control board.

(3) Take out the system control board from the bottom case

assembly.

3.1.10 Removing the front key board

(See Fig.18)

• Prior to performing the following procedure, remove the front

assembly.
(1) From the back side of the front assembly, remove the spac-

er from the front key board.

(2) Remove the eight screws N attaching the front key board

to the front assembly.

(3) Take out the front key board from the front assembly.

Reference:

After reattaching the front key board, cover it with the new
spacer.

on the sys-

M System control boardCN351 MM

Fig.17

N

Front key board Spacer

Fig.18

(No.MA209)1-9

4.1 Service mode

4.1.1 Standard conditions

Power supply voltage:DC14.4V (11V to 16V)

4.1.2 Service mode setting procedure

1. Press the [POWER] button, and the display panel will come out and stand upright.

2. Press the [POWER], [ ] and [OPEN/CLOSE] buttons in this order, and keep them
pressed for 3 seconds or more.

SECTION 4

ADJUSTMENT

[ ] button

[OPEN/CLOSE] button

[MODE] button

[POWER] button [MENU] button

3. The service mode menu is displayed in the monitor.

Service Mode Menu

>

INITIALIZE ALL
INFORMATION
LCD SETTING MODE
MONITOR MECHA RUNNING
MONITOR MECHA CHECK
READ MECHA ERROR
CLEAR MECHA ERROR
INITIALIZE

DW/UP : SEL MODE : ENT

The service mode menu is selected with the [ ] or [ ] button on the main unit,
and the service mode menu is entered with the [MODE] button on the main unit.

4. To exit the service mode, press the [POWER] button on the main unit for more than 3 seconds.

1-10 (No.MA209)

4.1.3 Operation procedures

Service Mode Menu

>

INITIALIZE ALL
INFORMATION
LCD SETTING MODE
MONITOR MECHA RUNNING
MONITOR MECHA CHECK
READ MECHA ERROR
CLEAR MECHA ERROR
INITIALIZE

DW/UP : SEL MODE : ENT

INITIALIZE ALL : All data are initialized to the factory default.

INITIALIZE ALL

"NOW EXECUTING" is displayed while the data is cleared.
After the data clear is completed, the screen returns to

NOW EXECUTING

COMPLETED

normal indication after "COMPLETED" is displayed for 3
seconds.

Data to be Initialized
All EEPROM data except the factory default of the system
micom and ROM collection data.

The service mode menu is
selected with the [ ] or [ ]
button on the main unit,
and the service mode menu
is entered with the [MODE]
button on the main unit.

INFORMATION : Area / Region indication / Version indication

INFORMATION

KV-M705

SYS VER XXXX XX
LCD INFO XX
TV TUNER VER XXXX
DOM

Version number of system micom and
ROM collection

This is used for technical support only.

Version number of TV tuner
(TV TUNER is connected.)

Area suffix of TV tuner

MENU : BACK

(TV TUNER is connected.)

Press the [MENU] button and the screen returns to the service mode menu.

LCD adjustment mode

LCD SETTING NTSC

COM AMPLITUDE

>

COM DC
DAC OUT
RGB AMPLITUDE
BRIGHT
GAMMA1
GAMMA2
SUB-BRIGHT R
SUB-BRIGHT B

DW/UP : SEL MODE : ENT
MENU : EEPROM WRITE

Indication
reshuffling

LCD SETTING NTSC

PHASE

>

CONTRAST
TINT
COLOR
PICTURE
INPUT MODE/SW
AGC SW ON
GAMMA TEST OFF
NTSC/PAL CHANGE

DW/UP : SEL MODE : ENT
MENU : EEPROM WRITE

Press the
[MENU]
button.

LCD SETTING NTSC
EEPROM WRITE

NOW EXECUTING

COMPLETED

Each setting value is written in EEPROM
by pressing the [MENU] button.

"NOW EXECUTING" is displayed while the data
is written.
After the data writing is completed, the screen
returns to service mode menu after
"COMPLETED" is displayed.

Indication
reshuffling

LCD SETTING NTSC

SETTING DISP ON>

DW/UP : SEL MODE : ENT
MENU : EEPROM WRITE

See "LCD adjustment" for details.

A

(No.MA209)1-11

A

Monitor Mecha Running mode

MONITOR MECHA RUNNING

>

RUNNING MODE-1
RUNNING MODE-2
RUNNING MODE-3
RUNNING MODE-4
RUNNING MODE-5
RUNNING MODE-6

DW/UP : SEL MODE : ENT
MENU : BACK

This mode is not used for service.
To exit running mode, press the [POWER] button for
more than 3 seconds.
Then service mode is finished.

Press the [MENU] button and the screen returns to service mode menu.

Monitor Mecha Check mode

MONITOR MECHA CHECK

ANGLE SENSOR MIN : XXXX
ANGLE SENSOR MAX : XXXX

INITIALIZE OK

MIN : Value of the monitor angle 0 C entered by the
initialization processing.
MAX : Value of the monitor angle 105 C entered by the
initialization processing.
(The displayed value is the AD value, which is taken into
the system micom.)
"INITIALIZE OK/NG" indicates completion/incompletion
end of the initialization processing.
("NG" is displayed when mechanism initialization have
not been completed.)

Read Mecha Error history

READ MECHA ERROR

TOTAL ERROR : XXXXXX

E-1 : XXXXXX E01 : XXXXXX
E-2 : XXXXXX E02 : XXXXXX
E-3 : XXXXXX E03 : XXXXXX
E-4 : XXXXXX
E-5 : XXXXXX

MENU : BACK

Total number of errors, the first five and the latest three
errors are displayed.

Press the [MENU] button and the screen returns to service mode menu.

Clear Mecha Error history

CLEAR MECHA ERROR

NOW EXECUTING

COMPLETED

The Monitor Mecha Error history is cleared.

Data to be cleared
Monitor Mecha Error history stored in EEPROM.

Initialization of user setting data

INITIALIZE

"NOW EXECUTING" is displayed while the data is cleared.
After the data clear is completed, the screen returns to

NOW EXECUTING

COMPLETED

normal indication after "COMPLETED" is displayed
for 3 seconds.

Data to be Initialized
User setting data of the system micom
(All EEPROM data except the factory default of system
micom, ROM collection data and the Monitor Mecha
Error history.)

1-12 (No.MA209)

4.1.4 LCD adjustment

LCD free run frequency adjustment

(1) Set the main unit in a service mode.
(2) Select "LCD SETTING" of the service mode.
(3) Connect the frequency counter to TP708 and TP761 (GND) on the monitor board.

(Not supplying a signal in the input.)
(4) Select "DAC OUT" of LCD SETTING menu to adjust.
(5) Carry out this adjustment with both modes of NTSC and PAL.

(Change "NTSC/PAL CHANGE" of LCD SETTING menu)

NTSC

15.734kHz

LCD SETTING MENU

Item Contents
COM AMPLITUDE
COM DC
DAC OUT
RGB AMPLITUDE
BRIGHT
GAMMA1
GAMMA2
SUB-BRIGHT R
SUB-BRIGHT B
PHASE
CONTRAST
TINT
COLOR
PICTURE
INPUT MODE/SW
AGC SW ON
GAMMA TEST OFF
NTSC/PAL CHANGE
SETTING DISP ON

PAL

15.625kHz

Amplitude of the common voltage
Center value of the LCD pulse
Free run frequency of the LCD
Amplitude of black-black
Brightness
GAMMA point 1
Difference with GAMMA point 1
Red brightness
Blue brightness
Phase of R-Y/B-Y
Contrast of video input
Hue
Deepness of a color
Picture

This mode not using it by service.
This mode not using it by service.
This mode not using it by service.

Reshuffling of NTSC/PAL
On/off for indication of adjustment value

LCD SETTING NTSC

COM AMPLITUDE XXH

MODE : BACK DW/UP : SET

Main unit operation in adjustment
[MODE] key : Return to LCD SETTING menu.
[ ], [ ] key : Change value, one step changes by one
time of input
Carry out this operation with both modes of NTSC and PAL.

When all the adjustment values are input, press the
[MENU] button to memorize the values in EEPROM.
When the power supply is turned off without pressing
the [MENU] button, the adjustment values are not
memorized.

Adjustment for all version (Carry out this adjustment with both modes of NTSC and PAL.)

NTSC adjustment

Item Production jig Def value
COM AMPLITUDE
COM DC
DAC OUT
RGB AMPLITUDE
BRIGHT
GAMMA1
GAMMA2
SUB-BRIGHT R
SUB-BRIGHT B
PHASE
CONTRAST
TINT
COLOR
PICTURE

Adjustment of frequency

3E
0A

DD

30
85
FF
80
85
30
A0
98
7B
10

Reference value

6D

28

CE

30
85
FF
84
8A
30

AB

98

7D

10

Adjustment
Adjustment
Adjustment
Adjustment
Fixed value
Fixed value
Fixed value
Adjustment
Adjustment
Adjustment
Adjustment
Adjustment
Adjustment
Fixed value

PAL adjustment

Item Production jig Def value
COM AMPLITUDE
COM DC
DAC OUT
RGB AMPLITUDE
BRIGHT
GAMMA1
GAMMA2
SUB-BRIGHT R
SUB-BRIGHT B
PHASE
CONTRAST
TINT
COLOR
PICTURE

Adjustment of frequency

3F
1A

D0
30
85
FF
80
85
30
A0
92
7F
10

Reference value

72
25

D0

30
85

FF

84

8A

30

AB

91
84
10

Adjustment
Adjustment
Adjustment
Adjustment
Fixed value
Fixed value
Fixed value
Adjustment
Adjustment
Adjustment
Adjustment
Adjustment
Adjustment
Fixed value

(No.MA209)1-13

SECTION 5

TROUBLESHOOTING

5.1 Mechanism initialization

Operate the mechanism initialization when replacing the top drive unit.

5.1.1 Operation procedure of mechanism initialization

(1) Setup the service mode, and operate "INITIALIZE ALL".

(Refer to "4.1.2 Service mode setting procedure" and "4.1.3 Operation procedures")
(2) After the all data are initialized, press the [RESET] button of the main unit.
(3) After the display panel is closed, start the operating the mechanism initialization.
(4) After the operating mechanism initialization, press the [POWER] button of the main unit for more than 3 seconds.

[POWER] button [RESET] button

1-14 (No.MA209)

5.2 8 PIN CORD DIAGRAM

OR/WH

RD

VI/WH

L.GN

NC

NC

YL

BK

BK

RD

OR

L.GN

VI/WH REVERSE

Black

Red

Orange

Light Green

WH

YL

VI

White

Yellow

Violet

ACC

MEMORY

GND

ILL

PARKING

L.GN PARKING

OR/WH ILL

RD ACC

BK GND

YL MEMORY

ACC Line

Memory Backup Battery+

Ground

Illuminations Control

Parking Brake

3 A

ILLUMI

POWER
LEAD

GROUND

POWER MEMORY
LEAD BACKUP

REVERSE

PARKING

REVERSE

Reverse Gear Signal Lead

(No.MA209)1-15