JVC KV-M705 User manual

SERVICE MANUAL
COPYRIGHT © 2005 Victor Company of Japan, Limited No.MA209
2005/10
IN-DASH 7-INCH WIDESCREEN MONITOR
MA209200510
KV-M705,KV-M706
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
Area suffix
J ------------- Northern America
E ------------- Southern Europe
UT ------------------------- Taiwan
UN --------------------- Indonesia
U -------------------- Other Areas
KV-M706
Area suffix
E ------------- Southern Europe
UT ------------------------- Taiwan
UN --------------------- Indonesia
HUN ------------------ Indonesia
U -------------------- Other Areas
KV-M705

1-2 (No.MA209)
SPECIFICATION
Design and specifications are subject to change without notice.
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)

(No.MA209)1-3
SECTION 1
PRECAUTION
1.1 Safety Precautions
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.
!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.

1-4 (No.MA209)
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 Aattaching the front assembly to the main body.
(See Fig.1.)
(2) From the bottom side of the main body, release the two
claws aattaching 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 on the front
key board and disconnect the card wire from it. (See Fig.3.)
Fig.1
Fig.2
Fig.3
A A Front assembly
Front assemblyClaws a
Front assemblyFront key board
Card wire
CN471

(No.MA209)1-5
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 Battaching the top drive unit to the main body. (See
Fig.4.)
(2) From the back side of the main body, remove the three
screws Cattaching 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 and CN392)
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.
Fig.4
Fig.5
Fig.6
B
B
Top case assembly
Top drive unit
CC
Top drive unit
System control boardBottom case assembly
Flexible wires
CN391CN392
Top drive unit

1-6 (No.MA209)
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 Dattaching 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 Eattaching 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 cof the mecha assembly as before. (See
Fig.10.)
• When reattaching the FPC guide, pass it through the section
bas before. (See Fig.8.)
Fig.7
Fig.8
Fig.9
Fig.10
D
Bottom case assembly
LCD assembly Section bSection b
FPC guide
Feed gear E
D
Bottom case assembly
LCD assembly
LCD assembly Slot c

(No.MA209)1-7
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 Fattaching the display rear cover to the LCD as-
sembly.
(2) Take out the display rear cover from the LCD assembly.
Fig.11
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 cov-
er.
(1) From the back side of the LCD assembly, remove the two
screws Gattaching the display back panel to the LCD as-
sembly. (See Fig.12.)
(2) From the both sides of the LCD assembly, remove the six
screws Hattaching the display back panel to the LCD as-
sembly. (See Fig.13.)
(3) Take out the display back panel from the LCD assembly.
Fig.12
Fig.13
F
Display rear cover
G
Display back panel
H
H
Display back panel
Display back panel

1-8 (No.MA209)
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 Jattaching the monitor board to the LCD assembly.
(2) Disconnect the wires from the connectors (CN791, CN851)
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, fix it with
the new tape.
Fig.14
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 dattaching 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.
Fig.15
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 Kattaching the rear bracket to the bottom
case assembly.
(2) Take out the rear bracket from the bottom case assembly.
Fig.16
J
J
Monitor board
CN791
Ground spring
Tape CN851
LCD moduleSection d
KRear bracket

(No.MA209)1-9
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 Mattaching the system control board to the bot-
tom case assembly.
(2) Disconnect the wire from the connector CN351 on the sys-
tem control board.
(3) Take out the system control board from the bottom case
assembly.
Fig.17
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 Nattaching 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.
Fig.18
MSystem control boardCN351 MM
N
Front key board Spacer

1-10 (No.MA209)
SECTION 4
ADJUSTMENT
4.1 Service mode
4.1.1 Standard conditions
Power supply voltage:DC14.4V (11V to 16V)
4.1.2 Service mode setting procedure
[POWER] button [MENU] button
[MODE] button
[ ] button
[OPEN/CLOSE] button
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.
3. The service mode menu is displayed in the monitor.
4. To exit the service mode, press the [POWER] button on the main unit for more than 3 seconds.
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.

(No.MA209)1-11
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
>
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.
INITIALIZE ALL
NOW EXECUTING
COMPLETED
INITIALIZE ALL : All data are initialized to the factory default.
INFORMATION : Area / Region indication / Version indication
INFORMATION
KV-M705
SYS VER XXXX XX
LCD INFO XX
TV TUNER VER XXXX
DOM
MENU : BACK
This is used for technical support only.
Version number of system micom and
ROM collection
Area suffix of TV tuner
(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
MENU : EEPROM WRITE
>
DW/UP : SEL MODE : ENT
MENU : EEPROM WRITE
DW/UP : SEL MODE : ENT
MENU : EEPROM WRITE
DW/UP : SEL MODE : ENT
See "LCD adjustment" for details.
LCD SETTING NTSC
PHASE
CONTRAST
TINT
COLOR
PICTURE
INPUT MODE/SW
AGC SW ON
GAMMA TEST OFF
NTSC/PAL CHANGE
>
LCD SETTING NTSC
EEPROM WRITE
Press 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.
Each setting value is written in EEPROM
by pressing the [MENU] button.
A
Indication
reshuffling
Indication
reshuffling
NOW EXECUTING
COMPLETED
LCD SETTING NTSC
SETTING DISP ON>
"NOW EXECUTING" is displayed while the data is cleared.
After the data clear is completed, the screen returns to
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.
Version number of TV tuner
(TV TUNER is connected.)

1-12 (No.MA209)
A
Initialization of user setting data
INITIALIZE
NOW EXECUTING
COMPLETED
CLEAR MECHA ERROR
NOW EXECUTING
COMPLETED
"NOW EXECUTING" is displayed while the data is cleared.
After the data clear is completed, the screen returns to
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.)
The Monitor Mecha Error history is cleared.
Data to be cleared
Monitor Mecha Error history stored in EEPROM.
Monitor Mecha Check mode
MONITOR MECHA CHECK
ANGLE SENSOR MIN : XXXX
ANGLE SENSOR MAX : XXXX
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
MENU : BACK
>
DW/UP : SEL MODE : ENT
E-1 : XXXXXX E01 : XXXXXX
E-2 : XXXXXX E02 : XXXXXX
E-3 : XXXXXX E03 : XXXXXX
E-4 : XXXXXX
E-5 : XXXXXX
MENU : BACK
TOTAL ERROR : XXXXXX
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.
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.)
INITIALIZE OK
Read Mecha Error history
READ MECHA ERROR Total number of errors, the first five and the latest three
errors are displayed.
Clear Mecha Error history
Press the [MENU] button and the screen returns to service mode menu.
Press the [MENU] button and the screen returns to service mode menu.

(No.MA209)1-13
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
PAL
15.625kHz
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
Item Contents
LCD SETTING MENU
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.
Adjustment for all version (Carry out this adjustment with both modes of NTSC and PAL.)
COM AMPLITUDE
COM DC
DAC OUT
RGB AMPLITUDE
BRIGHT
GAMMA1
GAMMA2
SUB-BRIGHT R
SUB-BRIGHT B
PHASE
CONTRAST
TINT
COLOR
PICTURE
Item Production jig Def value
3E
0A
Adjustment of frequency
DD
30
85
FF
80
85
30
A0
98
7B
10
NTSC adjustment
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
COM AMPLITUDE
COM DC
DAC OUT
RGB AMPLITUDE
BRIGHT
GAMMA1
GAMMA2
SUB-BRIGHT R
SUB-BRIGHT B
PHASE
CONTRAST
TINT
COLOR
PICTURE
Item Production jig Def value
3F
1A
Adjustment of frequency
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
PAL adjustment
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.

1-14 (No.MA209)
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

(No.MA209)1-15
5.2 8 PIN CORD DIAGRAM
RD
L.GN
NC
YL
OR/WH
VI/WH
BK
NC
REVERSE
PARKING
ILLUMI
POWER
LEAD
GROUND
POWER MEMORY
LEAD BACKUP
3 A
VI/WH REVERSE
L.GN PARKING
OR/WH ILL
RD ACC
BK GND
YL MEMORY
BK Black
RD Red
WH White
YL Yellow
OR Orange
ILL Illuminations Control
ACC
MEMORY
ACC Line
GND
Memory Backup Battery+
Ground
PARKING Parking Brake
VI Violet
L.GN Light Green
REVERSE Reverse Gear Signal Lead

(No.MA209)
AV & MULTIMEDIA COMPANY CAR ELECTRONICS CATEGORY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan
Victor Company of Japan, Limited
VPT
Printed in Japan

SCHEMATIC DIAGRAMS
IN-DASH 7-INCH WIDESCREEN MONITOR
No.MA209SCH
2005/10
KV-M705, KV-M706
COPYRIGHT 2005 Victor Company of Japan, Limited.
Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
Area suffix
J ------------- Northern America
E ------------- Southern Europe
UT ------------------------- Taiwan
UN --------------------- Indonesia
U -------------------- Other Areas
KV-M706
Area suffix
E ------------- Southern Europe
UT ------------------------- Taiwan
UN --------------------- Indonesia
HUN ------------------ Indonesia
U -------------------- Other Areas
KV-M705
Contents
Block diagram
Standard schematic diagrams
Printed circuit boards
2-1
2-3
2-11 to 14
CD-ROM No.SML200510

!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.
Safety precaution

< MEMO >

2-1
Main s
e
C
P
O
CON
N
IC701
TFT
CONTROL
Monitor section
CN791 CN851
CN501 CN392
TFT
LCD
MODULE
IC601
VIDEO
PROCESSOR
CLK_LCD
TX_LCD
C
C
N
ROUT, GOUT, BOUT
VCOM
COM_OUT
IC521
PORT
EXPANDER
EXP_DAT
EXP_CLK
EXP_STRB
E
E
E
CS
LTBOX, CPHSEL, QHSEL
IC511
LEVEL
TOLERANCE
EEP_DAT
EEP_CLK
IC631
OSD
CONTROLLER
CS
TX_LCD
CLK_LCD
INV_PWR
SYS5V
R_IN2
G_IN2
B_IN2
SW1, SW2
STH1, STH2
STV1, STV2
CLK1 to CLK3
OEV1 to OEV3
CPV, OEH
Q651 to Q654
VCOM
IC741
SYNC BUFF.
SYNC_OUT
HSYNCIN
VDBIN
Q701, Q702
POSITION SET
NTSC/PAL_OUT
POSSET
HPOS1
VPOS1
IC761
PLL
DAC_OUT
PD
RESET
BLACK, POL
IC703
INVERTER
HOUT
VOUT
HSY_IN
HSYNC
VSYNC
BACK
LIGHT
T851
TRANS.
IC811
B/L DRIVER
ENA
IC801
14V 5V
REG.
5V
S
IC901
SW
REG.
IC911
17V 12V
REG.
12V
V
Mecha
I
C
S
Y
RE
G
IC702
RESET
VIDEO_IN
C_VIDEO(+)_IN
IC691
VIDEO IN
BUFFER
Block diagram