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Great manual very clear copied. You are making an incredible job. I appreciate a lot the rapidity and your efficiency. Thanks a lot
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Good pdf of the service manual for this unit. Includes disassembly instructions, full schematics, board layouts, parts lists and diagnostic information. Some information is in the pdf twice (single pages, and split pages), but that could be how it was originally generated by panasonic, or perhaps the idea is to make it eaiser to put onto 8.5 x 11" pages.
Information was exactly what I needed. Delivery was overnight (less than 12 hours) and I was happy with the process.
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5 STARS for FAST DELIVERY, BEST PRICES and QUALITY PRODUCT. Item was exactly as described with superb resolution. Will definitely source all my future requirements from this website. Thanks a lot owner-manual.com!
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OEM manual provided all schematics, board layouts and component specs necessary to facilitate unit maintenance. All pages were clear and readable.
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Good condition and quality. Hard to find anywhere in Internet, only on this site.
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5.1.5 FLOWCHART OF FAILURE ANALYSIS FOR THE MAIN ASSY
A
Flowchart of Failure Analysis for The MAIN Assy
Failure analysis for the MAIN Assy. � MA1
The STB LED does not light although STB 3.3 V power is supplied.
Is the M1 connector securely connected? Yes
No
Securely connect the M1 connector.
B
Is the cable that is connected to the M1 connector broken? No Is resetting of the IF microcomputer canceled? Yes Is the voltage at Pin 1 of the M5 connector high? Yes Is the M5 connector securely connected?
Yes
Replace the cable (J207).
No
Replace the MAIN Assy.
Failure in the RST IC (IC4801) output or its peripheral circuits
No
Replace the MAIN Assy.
Failure in the line between the IF microcomputer and M7 connector
No
Securely connect the M5 connector.
C
Yes Is the cable that is connected to the M5 connector broken? No No problem with the MAIN Assy. Check the LED Assy. Yes Replace the cable (J113).
Failure analysis for the MAIN Assy. � MA2
D
The RELAY port does not work. The power is not turned on.
Is voltage at REQ_IF (3.3 V) on the MAIN Assy high? Yes
No
Can the unit be turned on, using the remote control unit? Yes
No
Can the unit be turned on, using No the Power switch on the main unit? Yes
Replace the cable that connects the SIDE KEY and MAIN Assys. NG Replace the MAIN Assy. NG
Replace the cable that connects the LED IR and MAIN Assys.
NG Replace the cable that connects the LED IR and MAIN Assys. NG
E
Can the unit be turned on, using No the Power switch on the main unit? Yes Replace the cable that connects the SIDE KEY and MAIN Assys.
Replace the LED IR Assy.
NG Replace the cable that connects the SIDE KEY and MAIN Assys. NG Replace the SIDE KEY Assy.
Replace the MAIN Assy. Is the power (1.8 V, 3.3 V) supplied to the main microcomputer? No Replace the MAIN Assy.
� Failure in the REC IC (IC4402) and PM SW (IC4407) outputs � Does the voltage remain low even though it should be active? � A shutdown, indicated by 9 flashes of LED, will be established in 20 seconds.
F
Yes Replace the MAIN Assy.
If the voltage at Pin 129 (RST2 port) on the main microcomputer is high, it is judged that the AC power cord is not plugged in, and operation of the unit will stop there.
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PDP-427XD
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