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There are currently no product reviews.
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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
XR-A550MD
¶ Disc loading is incorrect
Is disc loaded when it is inserted? NO Is Pin 4 of CN1601 set to "L"? YES Does either Pin 23 or 24 of IC1601 change? YES NO NO Check IC1401. NO Check CN1601 and SW1956. YES
Does either Pin 30 or 31 of IC1601 change? YES Check the CN1604.
NO
Check CN1604 and IC1601.
YES Does the system eject when the MD removal button is pressed? YES The disc table retracts after ejection is completed. YES Check CN1601 and SW1956. NO
¶ The system does not playback
The system play back neither reflection discs. NO The system does not playback only high-reflection discs. YES Is Pin 93 of IC1401 set to 1.02V±0.3V in Test mode, with high-reflection disc inserted? NO YES YES NO YES Go to "CHECKING BY TEST MODE". NO The system does not play back only low-reflection discs. YES Is Pin 93 of IC1401 set to 2.06V±0.3V (recording possible), 3.2V±0.3V (recording prohibit) with low-reflection disc inserted?
Go to "NORMAL PLAYBACK" after readjustment.
Check SW1951/SW1952, MD MECHA SW Assy and CN1601.
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