This is a good quality scan of the service manual which includes an assembly diagram, block diagram, schematic, and parts list. Exactly what is needed to repair my KR-V55R receiver.
Text excerpt from page 28 (click to view)
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7. GENERAL INFORMATION
7.1 DIAGNOSIS
A
7.1.1 DISASSEMBLY
- Removing the Case (Fig.1)
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Remove the six screws and then remove the Case.
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Case
- Removing the Amp Unit (Fig.2)
Fig.1
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Remove the fourteen screws and then remove the Amp Unit.