Power Failure Detection System; Error Information Table - Sanyo PLC-ET30L Service Manual

Troubleshooting

Power failure detection system

detection of Power failure
Projector provides a protection circuit to prevent the secondary failure when the power failure, fans failure or tem-
perature failure occurs on the projector. The power failure detection lines "P-FAIL_S5V", "P-FAIL_15V", etc. are con-
nected to the main power supplies and fans. When the failure occurs, IC301<SYSTEM CONTROL> receives an error
information through the power failure detection lines and turns off the signal "LAMP_DC_ON" output from pin 145 of
IC301 to stop the power supply.
The power failure detection signals are sent to IC1801<I/O EXPANDER> and then sent to IC301<SYSTEM CON-
TROL> .
diagnosis Information of Power Failure
Ic1801
detecting Signal Failure circuit/Parts
P-FAIL_1.8V 3.3V, .5V,1.8V and peripheral circuit on the Main Board
P-FAIL_S5V S5V, S9V, S1 and peripheral circuit on the Main Board
P-FAIL_15V 15V, 9V, 5V and peripheral circuit on the Main Board
P-FAIL_S1.V S3.3V, S1.V and peripheral circuit on the Main Board
P-FAIL_S-5V S-5V and peripheral circuit on the Main Board
P-FAIL_PJ PJ-Network Board and peripheral circuit on the Main Board
FAN_SPEED Failure of Fan, FN901, FN90, FN903, FN904, FN905 connected to the Power(DC) Board

Error information table

Ic Pin Signal Name
61 P-FAIL_1.8V
6 P-FAIL_S-5V
63 P-FAIL_S1.V
IC1801
64 P-FAIL_15V
65 P-FAIL_S5V
66 P-FAIL_PJ
FAN_SPEED5
103 (FAN_MTR5)
IC701 I I
108 FAN_SPEED1
(FAN_MTR1)
connection Lines
3.3V_AD, 3.3VA_AD, 3.3VD_AD,
1.8VA_AD, 1.8VD_AD, 3.3VGA,
3.3VPNL, 3.3V, .5V, 1.0VGA,
S-5V
S3.3VFP, S1.VFPGA,
S1.VFP, S1.VPA, S1.VPD,
15V_PNL, 15V_LNS,
9V_LNS, 15.5VRE, 5V
5VPW, S5V, S5V_TEMP,
S9V_AUDIO, S5V_AUDIO
PJ-Network Board, AV
3.3V1, S5V_EXT
FAN CONTROL
-89-
error Information
MAIN, 1.8/1.V
MAIN, S-5V
FPGA, S1.V
MAIN, 15/9/5V
MAIN, S5/S9/S1
PJ_N/AV, 3.3/S5V
FAN1, FANLOCK
FAN, FANLOCK
FAN3, FANLOCK
FAN4, FANLOCK
FAN5, FANLOCK
Failue Area
S6V3, S6V S6V1 line on
Main
S-5V line on Main, AV
S3.3V, S6V3 line on Main
15V_PNL. 15V_LNS,
9V_LNS, 15.5V, 5V line on
Main
S5V_TEMP, S5V_AUDIO,
S5V, S9V_AUDIO, S5VPW
line on Main
PJ-Network Board, 3.3V,
S5V line on AV, Joint
Fan Control on Power(DC)
FAN1 (FN901)
FAN (FN90)
FAN3 (FN903)
FAN4 (FN904)
FAN5 (FN905)