Panasonic PT-52DL52, Руководство по обслуживанию, Страница: 31 / 189

AD IC9025 OSD A/D conversion DG
DDP IC9701 DLP control DG
7.2. Power LED Flashing timing table
When an abnormality has occurred for a unit, the protection circuit operate and cuts the power
supply. At this time, the defective line can be identified by the number of flashes (red) of the
“Power LED” indication at the frontof the unit by means of the fault line which has operated the
protection circuit.
Times of
Flashing
LED
Priority Possoble Cause Detection Input
MPU Pin function Pin No. Detection voltage
Level
2 9 CW Color Wheel
abnormal DG MPU
(IC1001)
CW_DET
Pin 54
“L”
3 8 DG No comunication
with IC9701
(DDP1010) DG MPU
(IC1001)
(IIC1)
Pin 70/71
No comunication
4 6 FAN Ventilation FANs
abnormal DG MPU
(IC1001)
SOS_DET3
Pin 69
Over 2.25V
5 4 All
circuit Loading short-
circuit Main MPU
(IC1141)
SOS_DET1
Pin 57
from 1.25 to 2.25V
6 3 All
circuit Power line Over
current Main MPU
(IC1141)
SOS_DET1
Pin 57
Over 2.25V
7 5 PA Excessive high
voltage of Power
line Main MPU
(IC1141)
SOS_DET2
Pin 56
Over 2.25V
8 2 PA/DG Low voltage at +3.3
Volt line Main MPU
(IC1141)
MAIN_PWR_DET
Pin 69
Over 2.25V
9 1 PA/DG Low voltage at +5
Volt line abnormal Main MPU
(IC1141)
SUB_PWR_DET
Pin 68
Over 2.25V
10 7 DG No comunication
with IC1001 (DG
MPU) Main MPU
(IC1141)
(IIC5)
Pin 70/71
No comunication
11 11 DG DG MPU
(IC1001)
LMPSTB
Pin 45
“L”
No Light 10 PA AC line stop DG MPU
(IC1001)
AC_STOP_DET
Pin 61
“L”
8. Serviceman Mode
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