Question about Hitachi 61SWX10B 61" Rear Projection Television
I've just ordered my 4th surround pwb in 8 years. Does anyone know what is failing on this board? I'm capable of repairing the board myself but don't have much troubleshooting equipment anymore. I inspected it under a magnifying lens and did not see any heat-related damage, leaking caps, etc. I also sprayed cool-down on the ICs and board in general, and flexed the board while in operation - no change in symptoms.
From what you have said it is not a thermal problem (hot or cold sensitivity) By the way did you try to test it with heat? a hair drying gun works great, not a circuit integrity problem (solder joints and cracks). That leaves component failure as the possible cause. What you could do is to get a known good board and and use it as a comparison to a know bad board, using a huntron tracker (can be gotten on ebay) or taking voltage measurements and comparing them them to the known good board and vice verse. This will at least give you an idea of which component might be malfunctioning. As you know you will need a schematic, and a voltmeter for the test of the voltage levels.
I believe that the problem is in the output stage after the board in question, something is causing the board to overdrive and this might be destoring the board. Try the heat test and take measurements to check the voltage levels on the good and bad boards.
I hope this helps,
Posted on Jan 26, 2009
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Posted on Jan 02, 2017
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1. Loose connectors or failed PWB-C board.
Reseat all connectors and then replace PWB-C board (p\n 65FA-9360) if necessary.
2. Poor connection for the interface cable between
the MFP and scanner.
Reseat the MFP-to-scanner interface cable its a large molex cable with thumb screws to remove on the outside of case.(p/n
3. Failed PWB-F board.
Replace PWB-F board (p/n 4025-0103-27). Flash MFP with
most current firmware. The latest version firmware or system software is
available via the Konica Minolta Download if you need help with this write me back.
4. Incorrect scanner serial number.
Access service mode and select System Input. Verify the
correct scanner serial number has been input under Serial # Input.this is in Service mode. if you need help with this write me back
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