Power Failure Detection System - Sanyo PLC-WM5500 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 "PF_3.3V_AD", "PF_3.3V_KS", etc. are
connected to the main power supplies. When the failure occurs, IC301<SYSTEM CONTROL> receives an error infor-
mation through IC5201<FPGA>, IC4801 <I/O Expander> and then outputs the signal "LAMP_DC_ON" from pin 32.
The signal "LAMP_DC_ON" is supplied to power supply circuit to control the power supply operation.
Error information table
IC Pin Signal Name
112 PF_3.3V_AD
156 PF_3.3V_KS
157 PF_2.5V_KS
57 PF_1.8V_KS
152 PF_3.3V_GAM
151 PF_2.5V_GAM
251 PF_1.8V_GAM
55 PF_5VS1
191 PF_3.3VS1
56 PF_1.2VS1
59 PF_S3.3V
150 PF_15.5V_GAM
216 PF_5V_PJ
IC5201
237 PF_9V_LNS
XC3S50A
215 PF_15V_LNS
236 PF_6V_MAIN
235 PF_12V
234 PF_12V_FILTER
232 PF_S-6V_AV
212 PF_FN904
211 PF_FN902
147 PF_FN901
227 PF_FN905
226 PF_FN906
281 PF_FN903
183 PF_FN909
61 PF_S1.2V_FRT
IC4801
62 PF_S5V_MAIN
TE7783
63 PF_5V_MAIN
64 P_FAIL_LAN
343 FILTER_DET
IC301
388 FILTER_COUNT
PW392
-- FPGASW CONGIG
IC5201
126, SHUTTER_POSI1
168 SHUTTER_POSI2
Connection Lines
D3.3V_AD
3.3V_KS
2.5V_KS
1.8V_KS
3.3V_GAM
2.5V_GAM
1.8V_GAM
S5VI
S3.3VSI
S1.2VSI
S3.3V
15.5V_GAM
PJNET&3.3V
9V_LNS
15V_LNS
6V
12V
12V FILTER
S-6V
FN904 Power & Fan Lock
FN902 Power & Fan Lock
FN901 Power & Fan Lock
FN905 Power & Fan Lock
FN906, FN907, FN908 Power & Fan
Lock
FN903 Power & Fan Lock
FN909, FN910, FN911 Power & Fan
Lock
FPGA 1.2V
S5V
5V
3.3V LAN
Filter Cartridge Detection
Filter Motor
FPGA Config
Shutter Operation
-80-
Error Information Failure Area
AD, 3.3V 3.3V AD on Main
KS, 3.3V 3.3V Keystone on Main
KS, 2.5V 2.5V Keystone on Main
KS, 1.8V 1.8V Keystone on Main
GAMMA, 3.3V 3.3V Gamma on Main
GAMMA, 2.5V 2.5V Gamma on Main
GAMMA, 1.8V 1.8V Gamma on Main
HDMI 5V 5V HDMI on Main
HDMI 3.3V 3.3V HDMI on Main
HDMI 1.2V 1.2V HDMI on Main
MAIN. S3.3V S3.3V on Main
GAMMA, 15.5V 15.5V Gamma on Main
PJNET, 5V 5V Network Box
LENS, 9V 9V Lens Drive
LENS, 15V 15V Lens Drive
MAIN, 6V 6V on Main
AUDIO SW, 12V 12V Audio SW
FILTER, 12V 12V Filter Motor Drive
AV, S-6V S-6V on Main/AV
FN904 13V FN904 Power & Fan Lock
FN902 13V FN902 Power & Fan Lock
FN901 13V FN901 Power & Fan Lock
FN905 13V FN905 Power & Fan Lock
FN906, FN907, FN908 Power & Fan
FN906&7&8 13V
Lock
FN903 13V FN903 Power & Fan Lock
FN909, FN910, FN911 Power & Fan
FN909&10&11 13V
Lock
SWFPGA, 1.2V 1.2V SW FPGA
MAIN, S5V S5V on Main
MAIN, 5V 5V Main
LAN, 3.3V 3.3V LAN
FILTER, DET Filter Cartridge Detection
MOTOR, TIMEOUT Filter Motor
FPGASW, ERROR SWFPGA Config Error
SHUTTER, ERROR Shutter Operation Error