Sanyo PLC-WTC500L Service Manual

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Contents

Sanyo PLC-WTC500L Service Manual Manual pdf 93 page image

-93-Chassis DescriptionThis projector provides a function to get the error information of the projector by using the RS-232C serial port for thepower failure diagnosis.The further error information of the power failure and fan failure can be found out by using this function.Diagnosis procedure1 Connect a RS-232C serial cross cable to CONTROL PORT on the projector and serial port on the PC.2 Launch a communication software "Hyper terminal" provided with PC and setup the communication condition asfollows;Baud rate : 9600 / 19200 bpsParity check : noneStop bit : 1Flow control : noneData bit : 83 Turn on the projector. Check that the LED shows apower failure. (All the LEDs except LAMP LED areblinking)4 Type a diagnosis command of the power failure “CRALLPFAIL” and press a "ENTER" key within 1 secondon the command window of the software.The error information will be listed on the window asthe right.Check the status column. If “NG” is listed, the powerfailure occurs on its signal line (Power Line Name). Incase of the right table, this error information meansthat the power failure occurs on the 1.8V power supplyon the KS(Keystone) circuit on the main board (KS,S1.8V). Check if the parts connected to S1.8V_KSpower supply line are defective.Also the error information may be listed multiple as thebelow;In the above case, 2 kinds of causes are considered.One is the power failure occurs on the multiple placesat the same time, other is a power failure affects mul-tiple power supply lines even if the failure occurs on thesingle place.In the first case, Check if the parts connected to the mul-tiple power supply lines are defective. In the later case,determine a failure point referring to the power supplyflow chart on previous page. Basically, if the power fail-ure occurs on the upper side of power supply, the powerfailure is also detected on lower side of power supply frequently. If the failure occurs on the lower side of powersupply, it is lightly affected to the upper side of the power supply. In the above case, because the failure occurs onthe S10V power supply on the main board (MAIN/AV, S10/5V), the failure is also detected on the 9V_LNS_SHTpower supply on the main board (MAIN, 15/12/9V).* See "Power Failure Detection System" for further description of the Error Information.CR ALLPFAIL000 PJ_NET, S5/3.3V OK000 MAIN/AV, S10/5V OK000 MAIN, S-6V OK000 FPGA, S1.2V OK000 KS, S1.8V NG000 KS, S2.5V OK000 KS, S3.3V OK........ ............... ......... ......StatusError Information(Signal Name)ErrorCR ALLPFAIL000 PJ_NET, S5/3.3V OK000 MAIN/AV, S10/5V NG000 MAIN, S-6V OK000 FPGA, S1.2V OK000 KS, S1.8V OK........ ............... ......... ......000 MAIN, 15/12/9V NGErrorDiagnosis of Power Failure with RS-232C port