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Happy to find finally a schematic for this amplifier. The schematic is of good quality, the pcb layout is useless: all is black. Never the less, it is very easy to find the components on the board using the schematics.
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Hard to find manual was ready the next day. Scans were very legible (including schematics). All the essential parts of the service manual were present (adjustment procedure, schematics, and parts list). It would have been nice if the rest of the manual was included (disassembly procedure, theory of operation, etc.).
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The Service Manual for the Kenwood KR-V55R provided by owner-manuals.com was as described/advertised. The contents provided the necessary information to effect a diagnosis of the unit. The schematics above all else was instrumental in tracing the the signal flow from component to component.
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This manual was the factory original. Excellent value and contained all the details I needed. Easy dowwnload provided the information when I needed it.
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Impeccable, document très complet. Perfect, i get all i need. All schematic are correct. Thanks
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5.2 DIAGNOSIS OF THE MAIN ASSY
Power ON 1 Failure in the periphery of CN2301 Does a desired screen appear when selected a tuner? Yes No (Poor contact with the TURB Assy.) 2 Failure in the periphery of CN4501 (Power supply is not supplied from the POWER SUPPLY Assy.) 3 Failure in the periphery of IC4511, IC4521, IC4531, IC4541, IC4552, IC4561, IC4562 and IC4571 (Power supply is not supplied to each IC.) 1 Failure in the periphery of CN2301 (Poor contact with the TURB Assy.) 2 Failure in the periphery of IC3101 (Failure in the periphery of AUDIO ADC for input audio.) 3 Failure in the periphery of IC3201 (Failure in the periphery of AUDIO DAC for output audio.)
B A
No
Does a desired audio output it? Yes
No
No
Video recording and playback by HDD
Can the video recording and playback of HDD? Yes Video recording and playback by DVD
No
1 Failure in the periphery of CN5604 (Poor contact with the HDD.) 2 To the HDD check mode
No
C
Does the tray open?
No
1 Failure in the periphery of CN601 (Poor contact with the FRONT Assy.) 2 Failure in the periphery of IC501 (Failure in the periphery of the Driver IC.)
Yes Insert a disc and close the tray, then playback it
Do recognize a disc?
No
1 Failure in the periphery of CN101 (Poor contact with the Pickup Assy.) 2 Failure in the periphery of CN501 (Poor contact with the SPDL.) 3 Failure in the periphery of CN502 (Poor contact with the STEPPER.) 1 Failure in the periphery of CN2301 (Poor contact with the TURB Assy.) 2 Failure in the periphery of IC3101 (Failure in the periphery of AUDIO ADC for input audio.) 3 Failure in the periphery of IC3201 (Failure in the periphery of AUDIO DAC for output audio.)
No
D
Yes
Do play back desired video and audio? Yes DVD recording
No
No
E
Can record desired video and audio? Yes End
No
Failure in the periphery of CN101 (Poor contact with the Pickup Assy.)
No
Failure in the periphery of IC1001 (There is possibility of failure of the EMMA2RFE chip.)
F
DVR-650H-K
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