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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
WM-FX495 SECTION 1 SERVICING NOTES
This set detects the rotation of the idler gear (A) (side S) using the photo reflector (PH751). The PH751 is mounted on the MAIN board, therefore the idler gear (A) (side S) cannot be detected with the MAIN board removed. As a result, the motor (M601) cannot be controlled, causing malfunction. Further, the MD CONT switch (S601) is also mounted on the MAIN board, and with the board removed, the mechanism position cannot be detected and the operation is not changed over. Therefore, when the voltage check is executed with the MAIN board removed, follow the procedure provided below. 1. Setting 1) Refer to �3. DISASSEMBLY�, and remove the MAIN board. 2) Connect the MAIN board to the motor (M601) using jumper wires. These can be connected easily with the use of the extension tool (Part No. 1-769-143-11) (ten in one set). 3) Connect the AF oscillator to the TP752 and the BT401 (BATT� ). 4) Supply 1.5 V to the battery terminals using the regulated power supply. 2. Preset state To set the PLAY, FF, REW modes, the preset state must be set. 1) Check that the slider (NRA) and the MD CONT switch (S601) are set to the center position. If not, set the preset state as follow. 2) Move the MD CONT switch (S601) to the side, which the slider (NRA) is facing. 3) The slider (NRA) will move when the regulated power supply switch is set to OFF once and then set to ON. Move the MD CONT switch (S601) according to this timing and set to the center position.
� MAIN Board (Component Side) � � MAIN Board (Conductor Side) �
3. FF, REW modes 1) Check that the preset state is set. 2) Input the square wave or sine wave to the TP752 and the BT401 (BATT�). 3) Press the [FF] button or [REW] button . 4. 1) 2) 3) PLAY mode Check that the preset state is set. Input the square wave to the TP752 and the BT401 (BATT�). Press the Y button will move the slider (NRA) once towards the side REV and then to the side FWD. Move the MD CONT switch (S601) according to this timing will set the PLAY mode (side FWD). Press the Y button another time for a second and move the MD CONT switch (S601) according to the movement of the slider (NRA) will set the PLAY mode (side REV).
Note 1: If the above fails, perform from preset again. Note 2: When using headphones, the timing for move the MD CONT switch (S601) can be determined from the beep
sound.
BT401
battery terminal #
PH751
AF oscillator 1k�
TP752 (PHOTO)
RVS REW FF
t
+ �
square wave 2 Hz, 2 VdB 2Vp-p
FWD
S601 (MD CONT)
battery terminal 3 connect to themotor (M601)
3
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