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.
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.).
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.
This manual was the factory original. Excellent value and contained all the details I needed. Easy dowwnload provided the information when I needed it.
Impeccable, document très complet. Perfect, i get all i need. All schematic are correct. Thanks
Text excerpt from page 6 (click to view)
HTP-120 IDLING ADJUSTMENT
Adjustment of Idling current
1). Cancel the Auto standby ON mode. P604 is short. 2). Connect the DC volt meter to P531. 3). At the no load and no input signal condition. 4). Turn on the power switch. And adjust 0.25mV by trimmer (R544) on Main PC board. 5). After heat run for about 5 minutes, and set 4mV by R544 again.
D911 C912
Printed circuit board view from component side
C911
NCAF-7455
Trimmer
P604
Q623
R544
Q514
Q513
P623
P531
Q516 Q952 Q515
Q951
Q541
DC Volt meter
Setting position of shipping
Output level ---------------------- MIN