Eiki LC-HDT700, Service Manual

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Chassis Description
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_AV", "PF_AD", etc. are connected to
the main power supplies and fans. When the failure occurs, IC301<SCALER> receives an error information and then
outputs the signal "PFC_SW_EX" from pin 32. The signal "PFC_SW_EX" is supplied to power supply circuit as the
signal "PFC_SW" via IC1875 <Buffer> to control the power supply operation.
Error information table
Power failure detection system
ic Pin signal Name connection Lines error information Failure area
IC301
PW392
345 PF_AV S5V, S-5V AV, AV S5V, S-5V on AV board
138 PF_AD
3.3VAD, A3.3V_AD, D3.3V_AD,
A1.8V_AD, D1.8V_AD, S2.5V_PICA
MAIN, AD Main AD Power
245 PF_SI S3.3VSI, S1.2VSI MAIN, SI Main HDMI Power
67 PF_FRT S3.3VFRT, S1..2V_FRT_INI MAIN, F-FPGA Main FPGA IC5201 Power
257 PF_5V_PJ 5V_PJ PJ-NET, 5V Network Box Power
251 PF_PIC
S1.2V_PIC1, S1.2V_PIC1D,
S3.3V_PICD
MAIN, PIC Main FPGA IC3401 Power
60 PF_25V 25V MAIN, 25V Main 25V Power
282 PF_KS
S1.8VSK_KS, S1.8VMPLL_KA,
S1.8VAA_KS, S3.3VAA_KS,
S3.3VAB_KS,S2.5VAB_KS,
S2.5VAA_KS, S2.5VAC_KS
MAIN, KEYSTONE MAIN Keystone Power
180 PF_GAM
1.8V_DDR, 1.0V_DI_C, 1.8V_DDR,
1.8V_DI_TX, 3.3V_DI, 3.3V_SH,
2.5V_DI_TX, 2.5V_DI_RX,
2.5V_DI, HVDD, VVDD, 15V_SHR,
15V_SHG, 15V_SHB
MAIN, GAM Main Gamma Power
25 PF_9V 9V_LNS MAIN, 9V Main 9V Power
293 PF_S12V S12V MAIN, S12V Main S12V
154 PF_FN905&FN906 FN905, FN906 POWER & LOCK MAIN, FAN3 FN905&FN906 Power FAN3 & Lock
41 PF_FN907 FN907 POWER & LOCK MAIN, FAN1 FN907 Power FAN1 & Lock
33 PF_FN908 FN908 POWER & LOCK MAIN, FAN7 FN908 Power FAN7 & Lock
IC4801
TE7783
61 PF_FN901 FN901 POWER & LOCK MAIN, FAN6 FN901 Power FAN6 & Lock
62 PF_FN902 FN902 POWER & LOCK MAIN, FAN5 FN902 Power FAN5 & Lock
63 PF_FN903 FN903 POWER & LOCK MAIN, FAN2 FN903 Power FAN2 & Lock
64 PF_FN904 FN904 POWER & LOCK MAIN, FAN4 FN904 Power FAN4 & Lock
99 PF_LAN S3.3V_LAN AV, LAN AV S3.3V_LAN
IC301
PW392
343 FILTER_DET FILTER CONDITION DETECT ERR, FIL_DET Filter Cartridge is not installed
388 FILTER_COUNT MOTOR ERROR DETECT ERR, FIL_MTR Filter Motor Error
281 PRESS_SENS PRESSURE SENSOR DETECT ERR, PRESSURE Pressure Error
IC3401
83
160
SHUTTER_POS1_PIC1
SHUTTER_POS2_PIC1
SHUTTER POSITION SW ERR, SHUT_MTR Shutter Operation Error