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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
ADJUSTMENTS
1. 2. 3. 4.
E-F BALANCE ADJUSTMENT Connect oscilloscope to test point TP502 and TP503 on CD PCB. Traverse Waveform Press power switch on. Put test disc(TCD-781) in and press play button then pause button. 0V Pressing Fast Forward button, adjust RV502 to get that the oscilloscope waveform is symmetrical on the bottom in relation to 0V, and check this level. * Design and specifications may be subject to change without notice.
A
B
3. TAPE SECTION
Output Level Measurement Point R-CH Input Level Measurement Point L-CH 47 kohm 47 kohm VTVM Input Point Scope
Test Tape be used
Tape MTT-111N MTT-114N MTT-5511 Contents 3 KHz 10 KHz Blank Use Tape Speed Adjustment Head Azimuth Adjustment Record Frequency Property
1. 2. 3. 4. 5.
HEAD ADJUSTMENT (AZIMUTH) 10KHz test tape(example: MTT-114N) must be used for this adjustment. Connect to VTVM or oscilloscope to the headphone jack or speaker terminal. Press the play button. Adjust the azimuth by using a screw driver to maintain the max. L&R output voltage. Adjust tape A(1), tape B(2) respectively, Please secure the azimuth position by using locking paint.
RECORDING BIAS OSCILLATOR FREQUENCY ADJUSTMENT 1. Connect the frequency counter to TP603, GND. 2. Press the REC button. 3. Adjust L603 to obtain 80 KHz±100Hz
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