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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
KDC-3022,322,5023/R,5024/V/Y/YV,507,5094RY TEST MODE
1. How to enter the test mode
� While holding the preset 1 key and 3 keys, reset the unit. � When the number of total tracks of an MP3 disc is nine or less, unit playback from a track 1. � When the media to CD-DA, unit playback from track No.28 by key operation of preset 1 key.
2. How to exit from the test mode
� Reset the unit, ACC OFF, power OFF, and come off the front panel assy for the unit.
7. Audio-related specifications
� A short press of the Q key initiates the audio adjustment mode. � Pressing the � key on the remote initiates the audio adjustment mode. � Continuous holding of a remote control key is inhibited. � Bass, Middle and Treble are adjusted in 3 steps of -8 / 0 / +8 with the Track Up/down keys (default is 0). � Balance is adjusted in 3 steps of Left L15 / 0 / R15 Max with the Track Up/down keys (default is 0). � Fader is adjusted in 3 steps of Rear15 / 0 / F15 Max with the Track Up/down keys (default is 0). � HPF is adjusted in 2 steps of Through/170Hz (or 200Hz) with the Track Up/down keys (default is through). � LPF is adjusted in 2 steps of Through/120Hz with the Track Up/down keys (default is through). � Bass f, Bass Q, Bass EXT, Middle f, Middle Q and Treble f are not dealt with by the audio adjustment.
3. Initial status in the test mode
� Sources � Display � Volume � Loudness � CRSC � SYSTEM Q � Aux � Display color � Beep sound : All OFF. : All segments were lit. : -10 dB (displayed as 30) : OFF : OFF regardless of the presence of switching function. : Flat. : ON : white (variable color display model only) : ON
4. Special display in Tuner mode
When any of the following messages is displayed in Tuner mode, the Front-end (F/E) may be bad condition. � "TNE2P NG": The EEPROM is set to the default (unstable values) because the F/E was shipped without passing through the adjustment process, etc. � "TNCON NG": Communication with the F/E to microprocessor is not possible.
8. Menu-related specifications
� A short press of the PLAY/PAUSE key initiates the Menu mode. � Pressing the DNPP key on the remote initiates the Menu mode. � Continuous holding of a remote control key is inhibited. � Contrast is adjusted press of the Track up/down key in 3 steps of 0 / 5 / 10 (default is 5).
5. Forced switching of K3I
Each press of the Preset 6 key in Tuner mode should switch K3I from AUTO ¡ Forced Wide ¡ Forced Middle ¡ Forced Narrow ¡ AUTO. The initial status is AUTO and the display shows these modes as follows. � AUTO : FMA � Forced Wide : FMW � Forced Middle : FMM � Forced Narrow : FMN
9. Backup current measurement
When the unit is reset while ACC is OFF (i.e. by turning Backup ON), the MUTE terminal goes OFF in 2 seconds in place of 15 second. (The CD mechanism is not activated at this time.)
6. Test mode specifications of the CD receiver
� Forced ejection is inhibited in the reset start operation. When the unit is reset while a CD is loaded in it, the CD is not recognized by resetting. � Each press of the Track Up key jumps to the following track numbers: No. 9 ¡ No. 15 ¡ No. 10 ¡ No. 11 ¡ No. 12 ¡ No. 13 ¡ No. 22 ¡ No. 14 ¡ No. 9 (The cycle restarts from here.) � Each press of the Track Down key jumps to the previous track number to the track being played.
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