Panasonic LCD-201411 / AVC-201411 / AX900 Service Manual / Other ▷ View online
FR
LD
AP
P
A
P2
A02
Q7403/05
9
17
5V
IC5420
IC8101/03
3.3V
IC8950
3.3V
IC5400
1.8V
IC5703
1.8V
0.9V
P
16
V
Q7402
IC8104
HDMI3.3V
SUB1.8V
SUB_M_0.9V/SIB_I_0.9V
SUB3.3V
REG_1.8V
48/40V
LCD_TV_SUB_ON
48V
Output
16V
Output
P
A
2
0
0
0
1.1V
IC5705
DMD 1.1V
D
C
D
C
E
N
12V
Panel_VCC_ON
FR1
3-5
LCD Module
PNL12V
SUB5V
T-CON
PFC
T7201
IC7201
DC/DC
IC7301
P16V
IC5000
ANALOG
ASIC
IC8000
Peaks
Pro5
< and : A board (PNL voltage) >
4
5
16V
DC/DC
IC7405
IC7405
STB5V
IC1800
STB3.3V
VLED(*)
56/68V
33
(*)The DC level is different by the LCD panel.
Start up Operation (AX900) -10
IC1100
Stand-by/
Control
CPU
LED Drive
IC7700-07
DC/DC
IC7550
IC7550
/52/54/56
2
FR16
15
7
BL_ON
BL_ON
3.3V
1.5V
1.2V
1.5V
1.2V
1.8V
0.9V
0.9V
STB_I_1.2V
STB_I_1.5V
STB_I_1.8V
STB_I_0.9V
F16V
LD4
FR30/31
2
12
1-4
9-12
1-4
1-4
FR20
A15
BL_SOS
40
4
7
45
48
FR15
A16
12
2
Tr
AX900
IC9500
FRC(GCX)
Back Light
(TNPA5936**)
Transformer
T7301
T7302
T7302
The P16V is also used to generate the PNL-Voltage on FR board. IC1100 outputs the
Panel VCC ON signal. IC1800 starts generating the PNL12V by this signal. The PNL12V
is provided to T-con circuit of the LCD Module.
After that, IC1100 outputs the BL_ON command to the IC9500 on the FR board. The
IC9500 output the BL_ON command to AP board and LD board.
Panel VCC ON signal. IC1800 starts generating the PNL12V by this signal. The PNL12V
is provided to T-con circuit of the LCD Module.
After that, IC1100 outputs the BL_ON command to the IC9500 on the FR board. The
IC9500 output the BL_ON command to AP board and LD board.
It turns on the IC7550-7556 for DCDC in AP board and IC7700-7707 for LED backlight
drive in LD board. Then the backlight starts lighting, and LCD panel displays the pictures.
drive in LD board. Then the backlight starts lighting, and LCD panel displays the pictures.
If the backlight drive circuit does not work normally, the BL_SOS signal is informed to
the IC1100. At that time, IC1100 stops outputting the TV_SUB_ON signal and blinks the
red LED 1 times.
red LED 1 times.
< and : A board (PNL voltage) >
4
5
34
Start up Operation (AX900) -11
AX900
P
P
P
Power-SW/
Remote
Simple Power On Sequence
TV_SUB_ON signal
Power on
PANEL_VCC_ON signal
BL_ON_ON signal
< Display start >
PFC circuit (IC7201/T7201/7202 ) start working
16V/48(40)V output
PNL12V output
STB5V output
( Plug in )
A
A
A
A
35
36
5. SOS Protection Circuit and Troubleshooting
The troubleshooting of AX670/AX630 model is basically same as
Full HD(LD6) model. Refer to the Technical Guide “ITD1404901GE” .
Click on the first or last page to see other LCD-201411 / AVC-201411 / AX900 service manuals if exist.