Specifications

Service Modes, Error Codes, and Fault Finding
EN 18 L05.1U AA5.
5.8.10 ATSC
Figure 5-15 Fault finding tree “ATSC part”
F_15060_048.eps
180305
1 GND 0V
2 RED_IN 1.4Vpp(100IRE)
3 GND 0V
4 GREEN_IN 1.4Vpp(100IRE)
5 GND 0V
6 BLUE_IN 1.4Vpp(100IRE)
7 HS_IN 5.0Vpp
Analog video
(P1254)
8 VS_IN 5.0Vpp
1 R_OUT 1.15Vrms
2 GND 0V
3 L_OUT 1.15Vrms
Digital Audio
(P1219)
4 GND 0V
1 R_IN 2Vrms
2 L_IN 2Vrms
Analog Audio
(P1208)
3 GND 0V
1 3_3V 3.3V
2 3_3V 3.3V
3 GND 0V
4 GND 0V
5 9V 9VA
6 GND 0V
7 POWER_DOWN GND
8 STBY_EN GND
9 GND 0V
10 6V 6VA
11 6V 6VA
Power Supply
ATSC (P1533)
12 GND 0V
1 3_3V 3.3V
2 3_3V 3.3V
3 3_3V 3.3V
4 GND 0V
5 GND 0V
6 GND 0V
7 6V 6VA
Power Supply
ATSC (P1534)
8 GND 0V
1 Tx 3.3V
2 GND 0V
3 Rx 3.3V
4 POD_DET# 3.3V
5 EXT_PWRON 3.3V
1206 control
(P1206)
6 RESET# 3.3V
No picture,
No sound,
Raster OK.
Check
AGC Voltage,
Pin 1 of Tuner
AGC voltage
change with
difference
signal
strength
Check
AGC circuit section
Check
tuning voltage,
Pin 9 of Tuner
>30V
&
< 35V
Check
Supply voltage,
Pin 7 of Tuner
5V
Check Tuner,
Pin 4 & 5
I
2
C Bus
OK
Check YpbPr
O/P
(ATSC module)
Check
V
T
Supply section
OK
Replace ATSC
module
Check (K)
Deflection
controller
Panel
OK
YES
No
Check
Power Supply
No
No
YES
Check ATSC
module
connector
OK
Check supply
voltage
6V & 3V3
OK
Check
ATSC (P1206)
UART Signal
Check
Hercules UART
O/P
Check
ATSC (P1533)
& (P1534)
Power supply
Check
Wiring of
ATSC module
No
No
No
No
No di
g
ital
p
icture & Sound
YES
YES
YES
YES