Kenwood LZ-651W Service Manual
6.5-inch WIDE TFT COLOR MONITOR
LZ-651W
SERVICE MANUAL
Panel
(A64-3137-08)
© 2003-5 PRINTED IN JAPAN
B53-0060-00 (N) 3100
TV stand assy
(W01-1621-05)
Clamper assy
(J11-0647-05)
Liquid crystal
(B38-1129-05)
Dressing panel
(A21-4313-08)
DC cord
(E30-3235-08)
Remote controller assy
KNA-RC300 (A70-2047-05)
Not supplied
(SIZE : AAA)
LZ-651W
BLOCK DIAGRAM
MAIN UNIT (X09-716)
to NAVI
NAVI L
NAVI R
AGND
NAVI SYNC
NR
NG
NB
REMO
ACC
14.4V
to
BATTERY
ACC
GND
PARKING
MUTE
A-IN V-IN GND
Q512
LEVEL UP
POWER SUPPLY
Q107,108,118
M5V AVR
IC101,Q105
FLYBACK
CIRCUIT
P-ON
IC101
Q101
P-ON
CHOPPER
CIRCUIT
IC401
L
ANALOG
A-IN
NAVI L,NAVI R
Q508
V-IN SYNC
SW
L.P.F.
R
Q509
NAVI SYNC
NR,NG,NB
I2CBUS
OSD R,G,B
ACC DET
PARKING
M5V
+13V
+7.5V
+5V
+3V
-10.9V
-16V
BL7.8V
MUTE
IC301
P-ON
ACC
BEEP
I2CBUS
IC303
EEPROM
AUDIO
MI-COM
16MHz
SEL
IC302
RESET
IC502
Y,C
IC505
SYNCHRO
SEPARATOR
V MUTE
VD,HD
MDS,MDW,MON
IC402
VIDEO SIGNAL
PROCESSOR
IC201
REMO
SENSOR
S201
DIMMER
SENSOR
L
R
T. FILTER
CF1,CF2
REMO
IC202
MIXISO AMP
VCOM
POL
HSS
IC501
BASEBAND
DELAY LINE
IC405
POWER AMP
VOL/MUTE
IC506,Q515,516
Q114-116
INVERTER
VCOM DRIVER
+7.5V/-16V
IC503
FRPT
SYNI
TIMING
CONTROL IC
OSCO
IC504
PLL
OSCI
SP
TFT LCD
RGB
VCOM
6.45inch
TFT LCD
MOD2
MOD1
VR1
SPS
CLS
CLD
SPIO
CTR
HR
SPOI
SAM
+13V
+5V
-10V
-10V
-16V
BACKLIGHT
LEVEL DIAGRAM
320mVrms
NAVI AUDIO
AUDIO
SIGNAL
VIDEO
SIGNAL
1Vrms
AV AUDIO
1Vp-p
AV VIDEO
0.7Vp-p
NAVI RGB
1Vp-p
NAVI SYNC
IC401
L
R
AUDIO
SW
FILTER
1Vp-p/Y,C
L
R
IC402
ISO
AMP
2.7Vp-p/AV
1Vp-p/NAVI
L
MIX
R
1.6Vp-p/AV
0.5Vp-p/NAVI
0.9Vp-p/SYNC
IC405
AUDIO
AMP
(VOL MAX)
4.8Vp-p/AV
2.2Vp-p/NAVI
SP
IC502
IC503
TIMING
CONTROL
TFT
LCD
LEVEL
UP
5Vp-p
VIDEO
SIGNAL
PROCESSOR
1Vp-p/SYNC
2.9Vp-p/RGB
2
LZ-651W
COMPONENTS DESCRIPTION
● MAIN UNIT (X09-7161-00/7162-00)
Ref No. Parts No. Specification / Function
IC101 FA7703V
IC201 TSOP1838-NK
IC202 TC7SH08F-TE85L
IC301 TMP88CP38AF-NK
IC302 S-80845CNNB-NK System reset IC
IC303 S-24CS02AFB-NK E2PROM (Such as a user setup data is back up for E2PROM memory)
IC401 TC4053BF (N) C-mos analog switch (Selector of Input audio signals)
IC402 BA3121F Reduces of in-phase of noise for input signal
IC405 TDA7052BT
IC501 TDA4665T Base band delay line (One-line delay line)
IC502 AN2546FH-A Video signal processing IC for liquid crystal display monitor
IC503 LZ9GJ25 Timing control IC for liquid crystal display monitor
IC504 NJM2107F VCO low path filter
IC505 MM1108XFFE Vertical synchronies separation IC (PAL/NTSC automatic distinction)
IC506 NJM4580V
Q101 2SJ377 Switching regulator
Q105 2SK3416TL-NK Switching regulator (Main power supply : Power MOS FET)
Q106 2SD1766 Power supply for COM signal line (7.5V)
Q107 2SB1203-FA
Q108,118 2SC4081
Q112 DTC124EUA PWM signal buffer (from microprocessor)
Q113 DTA143EUA Switching for inverter circuit (receiving to PWM signal from microprocessor)
Q115,116 2SC3518-Z-T1LK Inverter voltage circuit (Switching frequency 55KHz)
Q201 2SC4081 ACC voltage detector
Q202 DTA124EUA Packing detector
Q203 DTC124EUA Muting detector
Q204 2SA1576A (R,S) ACC voltage detector (detect voltage=9.5V)
Q205 DTC124EUA ACC voltage high detector (17V)
Q401 DTC124EUA Switching transistor (select to input signal NAVI or AV IN)
Q403 DTC124EUA Audio muting transistor
Q404 DTC124EUA Buzzer driver (BZ401)
Q501 2SC4081 Vertical synchronize separation
Q503,504 2SC4081 Composite synchronize buffer amp (Voltage shift 3V to 5V)
Switching power supply control IC (Main system and the power supply for inverters are
controlled. It has the regulator of 2.2V in an inside.)
Remote control IC (In response to the infrared signal from remote control data is
transmitted to a microprocessor).
Remote control signal buffer (When the microprocessor pin No. 14 is H, remote control
signal is sent to NAVI unit)
System control microprocessor (In addition to the demand processing from remote control
etc., OSD is displayed on a liquid crystal display monitor by the RGB output data)
Monophonic power amplifier of an audio power amplifier BTL system. Volume is controlled
on the voltage of VC terminal.
VCOM signal is received from the dual operational amplifier IC 502, and gain adjustment
and a level shift are performed.
Power supply for microprocessor (5V)
3
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