Power Failure Detection System - Sanyo PLC-XP57L Service Manual

Chassis Description

Power failure detection system

Detection of Power failure
The 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 "MAIN_6V_PF", "MAIN_-5V_PF", etc. are
connected to the main power supplies. When the failure occurs, IC801<CPU> receives an error information through
the power failure detection lines and turns off the signal "IC_RESET_CPU" output from pin 211 to stop the power
supply.
The power failure detection signals are sent to IC4801<I/O expander> and then sent to IC801<CPU>.
Error information table
IC Pin
64
65
66
67
68
69
70
IC4801 71
TIC81592GPBM 72
73
74
77
78
80
82
83
56
Signal Name Connection
PJ_5V_PF PJNET S5V
-5V_AV_PF AV S-5V (AV BOARD)
S5V_AV_PF AV S5V (AV BOARD)
MAIN_-5V_PF SUB_POWER S-5V (MAIN)
M/A_PF MOTOR&AUDIO 12V
FAN_PF FAN
SWF_1.2V_PF SW FPGA 1.2V
SWF_2.5V_PF SW FPGA 2.5V
VDEC_1.8_PF CXD3807 1.8V
FPGA_1.5V_PF FPGA 1.5V
GAM_15.5V_PF GAMMA 15.5V
MAIN_6V_PF SUB POWER 6V
MAIN_3.3V_PF SUB_POWER 3.3V (MAIN)
AD_3.3V_PF AD9882 3.3V
AD_5V_PF AD9882 5V
GAM_1.8V_PF GAMMA 1.8V
LAMP_FAN_PF LAMP_IN_FAN 16V
- 48 -
16V
(MAIN)
Error Information
PJNET, S5V
AV, -5V
AV, S5V
MAIN, S-5V
M/A, 12V
FAN, 16V
SWFPGA, 1.2V
SWFPGA, 2.5V
ANALOG, 1.8V
FPGA, 1.5V
GAMMA, 15.5V
MAIN, 6V
MAIN, 3.3V
ANALOG, 3.3V
ANALOG, 5V
GAMMA, 1.8V
LAMP FAN, 16V