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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
KMD-300/GD2
TEST MODE
1.4 Test mode for MD Changer mechanism operation
1.4.1 How to enter the Test Mode for MD Changer mechanism operation After selecting the Test Mode selection mode, while the LED�s for the q, w, and e keys are lighting up, consecutively press the q, w, and e keys. The Test Mode for MD Changer mechanism operation can then be entered. During key input, the LED corresponding to the key goes out, enabling key input confirmation. After effective key input, when the Test Mode for the MD Changer mechanism operation is entered, all unlit LED�s will light up. In case of an error in key input, or no effective key input were conducted for ten or more consecutive seconds, the Test Mode selection mode is released. It is then necessary to restart from the setting for the Test Mode selection mode. Table 3 Test Mode input procedure for MD Changer mechanism operation Procedure and result 1 2 3 4 5 6 7 Status and Operation Key (result) / LED (� light up) q In Test Mode selection mode e key input w key input q key input Test Mode for MD Changer mechanism operation Elapse of ten seconds Release of the Test Mode selection mode � 7 � 7 � 5 K � 7 K K w � 7 � 4 K 7 K � 7 K K e � 3 K 7 K 7 K � 7 K K 1.4.2 Releasing the Test Mode for MD Changer mechanism operation The following methods release the Test Mode for MD Changer mechanism operation. Ideally, the condition after exiting the Test Mode should be the same as after resetting the hardware by means of the program. This, however, cannot always be achieved at present Below are ways to release the production line Test Mode selection mode. The system must always be reset after the final process in the Test Mode. When, however, desiring to enter the transport position, simply shut off the power after confirming that the mechanism will shift into the transport position. Remember that, when resetting after shifting into the transport position, the unit will return to the initial position. 1. By resetting the system 2. After setting this mode, no effective key input is made for ten seconds. 3. After entering the Test Mode, an ineffective key was pressed. 1.4.3 Initial condition of the Test Mode for MD Changer mechanism operation There is no special initial setting in the Test Mode. Nevertheless, to indicate that the Test Mode has been entered, all LED's installed on the q, w, and e keys will light up.
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