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The service manual is as described and received the link to the download sooner than expected. Great service, quality product. This site is a big help in the electronics repair business.
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Il service manual molto accurato. Rapidi nella risposta
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Quick site processing. A complete and very useful manual with all details. Thank you!
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Quick service response. A useful and very rare service manual with all details. I recomend this service.
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I ordered this manual sometime in the afternoon and I received it on my e-mail the same evening.
This is a fantastically good and properly scanned copy of the original manual. All pages are of the same scale and they overlap each other. It means that you can print the manual and easily make it as a convenient paper manual.
The content of the manual is fantastic. Alignment descriptions, PCB layouts and elementary diagrams are explicit and precise. I immediately found what I was looking for. Thanks to this manual and Owner-Manuals.com my amplifier is alive again. Many thanx indded!
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[2] POWER SUPPLY UNIT
Flowchart of Failure Analysis for The POWER SUPPLY Unit
Failure analysis for the POWER SUPPLY Unit => PP1 STB 3.4 V power is not output.
Is the cable connected firmly to the P7 connector? Yes
B
No
Properly connect the cable between the P7 and M2 connectors.
Is the cable to the P7 connector broken? No Is the fuse (F001) blown? No Is one of the limiting resistor (FR002) blown? No The POWER SUPPLY Unit is normal.
Yes Replace the defective cable (J109).
Check the voltage at the MAIN Assy and POWER SUPPLY Unit.
Yes Replace the POWER SUPPLY Unit.
Yes Replace the POWER SUPPLY Unit.
Check the resistance between D025 cathode and C101 (+), using a tester.
C
Failure analysis for the POWER SUPPLY Unit => PP2
The power is not on, even though the RELAY port is active.
No Is the relay (RY002) on? Yes No Is the PFC voltage normal? Yes
D
Replace the POWER SUPPLY Unit.
� Check the relay operation at the RY002. (Voltage: 3.4 V) � Check the relay sound (click).
Replace the POWER SUPPLY Unit.
� Check the voltage between the C017 (-) and C017 (+). � The voltage must be around 400 V. (340V or less are defective.) Caution: High voltage!
The POWER SUPPLY Unit is normal.
Failure analysis for the POWER SUPPLY Unit => PP3
The cells of the panel do not light normally.
Is the VADR voltage within the specified values? Yes
E
No
Replace the POWER SUPPLY Unit.
The specified voltage values are between 72 and 78 V.
Is there a fluctuation in the VADR voltage? No Is the VSUS voltage within the specified range? Yes Is there a fluctuation in the VSUS voltage? No The POWER SUPPLY Unit is normal.
Yes
Replace the POWER SUPPLY Unit.
The ripple must be within 5 V.
No
Replace the POWER SUPPLY Unit.
The specified voltage values are between 200 and 210 V (VSU: 125/35°C).
Yes Replace the POWER SUPPLY Unit.
The ripple must be within 10 V.
F
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KRP-500P
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