LZ-7500
2002-6 PRINTED IN JAPAN
B51-7959-00 (4) 1877
7 INCH MONITOR
C
SERVICE MANUAL
Panel assy
(A64-2962-08)
Mounting hardware assy
(W01-1605-08)
Mounting hardware
(J22-0002-08) x2
Metallic cabinet
(A01-2812-08)
Cord with plug
(E30-6162-08)
DC cord
(E30-6163-08)
Tapping screw
(N09-6090-08) x4
Tapping screw
(N09-4443-08) x2
2
LZ-7500
BLOCK DIAGRAM
R/M
I/F
I/F
REMOTE
SENSOR
CONTROL
DIMMER
SENSOR
(BLUE)
LED
SWITCH
KEY
LCD
CONTROLLER
EEPROM
VSEP
Y/C
SEPARATE
CHROMA
DECODE
REGULATOR
RESET
DC/DC
DC/DC
7"LCD
VCOM
INVERTER
CFL
MICRO
PROCESSOR
PROCESSOR
MICRO
EEPROM
REG 9V
REG 8V
I/F
SOUND
PROCESSOR
SHIFT
LEVEL
AV SELECT
AMP
SPEAKER
RESET
REGULATOR
A8
IC401
IC1001
IC501
IC1002
1004
IC1003,
A9
A6
A11
IC1601
IC802
IC805
IC1006
A5
IC801
B1
SP1
RM3201
D3201
D3221
IC1203
IC901
Q1201
IC1205,1206
IC1211
IC1204
Q804
IC601
Q701
IC1201
5V
IC804
R20
2
ACC
RGB GND
RGB GND
GND
19
1
17
15
G
B16
18
5
RM
V+/SYNC
V-
SD I/O
SCL
11
12
6
7
SP+
SP-
4
3
RGB GND
HD
VD
HP
VP
OSD
2WIRE
Y
C
SYNC SEP.
RGB
9
REV
GND
ACC
1
10
PKB
4
SP-
3
RGB GND
15
RGB GND
RGB GND
ACC
ACC-
2
1
17
19
V+/SYNC
12
BLUE
GREEN
18
16
RED
20
V-
11
5RM
6
SD I/O
SCL
7
SP+
4
1
15
10
11
14
6
87
13
29
54
V1
L1
R1
CAMERA
V2
R2
L2
VOUT
LOUT
ROUT
IIC
TUNER UNIT
MONITOR UNIT
SW UNIT
8.4V
7.5V
5V
9V
5V
8V
5V
3
LZ-7500
COMPONENTS DESCRIPTION
Ref No.
Specification
Function
·MONITOR UNIT
IC601
IC602
IC604
IC605
IC606
IC851
IC901
IC902
IC903
IC904
IC905
IC1201
IC1203
IC1204
IC1205
IC1206
IC1208
IC1209
IC1211
Q601
Q602,603
Q604
Q605
Q611,612
Q701
Q702,703
Q704
Q705
Q706
Q712
Q802
Q804
Q805
Q806
Q807
Q808
Q902
Q903
Q905
Q906
Q907
Q908
Q909,910
Q911,915
Q916
Q917
Q1201
Q1202
Q1205
For color liquid crystal
Synchronous separation with synchronous detection
Logic IC
For video
Logic IC
PWM method Switching power supply control
C-MOS gate array
Operation Amplifier
Operation Amplifier
Reset IC
Logic IC
Microcomputer
Serial E2 PROM
All-round C-MOS
Logic IC
Logic IC
Operation Amplifier
Comparator
3 terminal Regulator
Transistor
Transistor
Digital Transistor (47k
x2)
FET
Transistor
FET (Diode built-in)
Transistor
Transistor
Digital Transistor (10k
,47k)
Digital Transistor (47k
x2)
Transistor
Transistor
FET (Diode built-in)
Transistor
Transistor
Digital Transistor (10k
x2)
Digital Transistor (10k
,47k)
Transistor
FET
Digital Transistor (47k
x2)
Digital Transistor (10k
,47k)
FET
Transistor Composite (Two pieces)
Transistor
Transistor
Digital Transistor (47k
x2)
Transistor
Digital Transistor (10k
,47k)
Digital Transistor (47k
x2)
Digital Transistor Composite (Two pieces) 10k
,47kx3
Chroma signal processing
Synchronous separation
Input swintching
PAL 1H delay
Waveform shaping
DC-DC converter
TFT timing controller
VCO control
For Vcom generating
Timing controller
Schmitt inverter
System control
Memory
Microcomputer Reset
For Communication
Schmitt inverter
For a touch-panel voltage input
For high temperature protection
voltage conversion
Video signal clamp
Buffer
Buffer
For synchronized signal separation circuit
Buffer
For dimmer control circuit
For an inverter transformer drive
For the protection
Switching
Switching
For protection circuit
For a DC-DC transformer drive
For the power supply circuit
voltage conversion
For the power supply circuit
For Power supply circuit control
Power supply circuit control
Synchronous processing
For synchronized signal separation circuit
Sync signal processing
For Sync signal processing circuit
For Sync signal processing circuit
For the Vcom output circuit
For the Vcom output circuit
Switching
frequency switching
frequency switching
For remote control signal output
Remote control signal output
For LED dimmer control
4
LZ-7500
COMPONENTS DESCRIPTION
Ref No.
Specification
Function
Q1212-1215
Q1216-1218
Q1219
Q1220
Digital Transistor (10k
x2)
Transistor
Transistor
Transistor
For the touch panel control
For the OSD half brightness control
For buzzer control
buzzer voltage conversion
Ref No.
Specification
Function
IC401
IC501
IC502
IC802
IC804,805
IC809
IC1001
IC1002
IC1003
IC1004
IC1006
IC1010
IC1601
IC1801
IC1803,1804
Q501
Q502
Q521
Q522
Q805
Q1006
Q1009
Q1010
Q1012
Q1014
Q1605
Q1606,1607
Q1608
Q1610
Q1616
Q1617-1619
Q1620
Audio
Audio
Transistor
Regulator
Regulator
Regulator
Microcomputer
Serial E2 PROM
3 state buffer
All-round C-MOS
Reset
C-MOS analog switch
Operation Amplifier
For video
Operation Amplifier
Digital Transistor (47k
x2)
Transistor
Transistor
Digital Transistor (1k
,10k)
Transistor
Digital Transistor (47k
x2)
Digital Transistor (47k
x2)
Digital Transistor (47k
x2)
Digital Transistor (47k
x2)
Digital Transistor (10k
,47k)
Transistor
Digital Transistor (2.2k
)
Digital Transistor (10k
,47k)
Transistor
Digital Transistor (2.2k
)
Digital Transistor (10k
,4.7k)
Digital Transistor (10k
,4.7k)
Sound processor
Speaker audio amplification
Amplification gain control
Voltage conversion
Voltage conversion
Voltage conversion
System control
Memory
Communication
Communication
Reset
Remote control switching
Amplification
Signal switching switch
GND ISO
Mute switching switch
Audio amplifier volume control
Audio mute
Audio amplifier mute
Voltage conversion
For PKB input
Camera switches
Switching
Synchronous reversal
Remote control synchronous reversal
Video output
LINE OUT mute
LINE OUT mute
Video output
LINE OUT mute
RGB mute
SYNC mute
·TUNERUNIT
D3201
D3221
RM3201
Optical sensor
Light emitting element (LED)
Photo sensor components
Dimmer sensor
For the power supply indication
remote control signal sensor
Ref No.
Specification
Function
·SWITCHUNIT
5
LZ-7500
MICROCOMPUTER'S TERMINAL DESCRIPTION
PIN No.
I/O
Terminal
Pin Name
Function
Tuner microcomputer (IC1001)
1
2
3
4
5
6
7
8-11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29-31
32
33
34
35
36
37
38
39
40,41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
PF5
TXD
RXD
PPO0
PPO1
PPO2
PPO3
PD4-7
PC0
PC1
PC2
PC3
PC4
PC5
PC6
PC7
PH0
PH1
PH2
PH3
PH4
PH5
PH6
PH7
PJ0
PJ1-3
PJ4
PJ5
PJ6
EXI1
RST
EXTAL
XTAL
VSS
EXI2,3
AVSS
AVREF
AVDD
AN0
AN1
AN2
AN3
PA0
PA1
AN6
AN7
PA4
PA5
PA6
PA7
NC
TXD
RXD
ANT0
ANT1
ANT2
ANT3
NC
NC
SEN
RGB MUTE
AMP-CNT
VIDEO-CNT
VIDEO-IN
CAMERA-IN
COMP-MONO
FM-ENABLE
FM-DATA
FM-CLOCK
FM-CHANGE
@PIN
PWR-CNT
NC
RGB/VSYNC
PKB-IN
NC
MUTE
POWER-ON
NC
TV-SYNC
RST
EXTAL
XTAL
VSS
NC
AVSS
AVREF
AVDD
5V-V
9V-V
12V-V
8V-V
LINE3
SD
S-METER
VID-SIGNAL
Sound multiplex 1
Sound multiplex 2
Sound multiplex BIL-IN
Sound multiplex ST-IN
O
O
I
O
O
O
O
O
O
I
O
O
O
I
I
O
O
O
O
O
O
O
O
O
I
O
O
O
O
I
I
-
-
-
I
-
-
-
I
I
I
I
O
O
I
I
O
O
O
O
NC
UART OUT (Navi communication)
UART IN (Navi communication)
NC (antenna 1)
NC (antenna 2)
NC (antenna 3)
NC (antenna 4)
NC
NC
Overseas, domestic model judgment
RGB video mute
NC
NC
NC
Compulsive camera input
NC
NC
NC
NC
NC
NC
Power supply control
NC
NC
PKB input
NC
Line out mute
Power ON/OFF
NC
NC (TV tuner VSYNC input)
Reset signal input
Crystal clock oscillation
Crystal clock oscillation
GND
NC
A/D converter GND
A/D converter standard voltage input
A/D converter positive voltage input
5V check
9V check
12V check
8V check
NC
NC
NC (S meter)
NC (TV video signal)
NC
NC
NC
NC