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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
AVD-S50/S50ES
2-3. Track/Layer Jump Track/Layer Jump FWD R.Lj L0>L1 REV L.Lj L1>L0 Fine FWD U.Fj L0>L1 Fine REV D.Fj L1>L0 Dirc FWD Dirc REV Dirc FWD Dirc REV
2-5. EEPROM Write Adjust EEPROM Write Adjust 1. 2. 3. 4. 5. 6. Focus Offset Focus Gain Trk. Offset Coarse ������ Trk. Gain EQ Boost
1. 1Tj 2. 1Tj 3.500Tj 4.500Tj 5.10kTj 6.10kTj 7.20kTj 8.20kTj
0.All Servo Off 0. All Servo Off Exit: RETURN On this screen, track jump, etc. can be performed. Only for the DVD dual layer disc, the focus jump and layer jump are displayed in the right field Exit: RETURN On this screen, each item can be adjusted automatically. Select the desired number [1] to [10/0] from the remote commander, and selected item is adjusted automatically.
[1] 1Tj FWD : 1 track jump forward. [2] 1Tj REV : 1 track jump reverse. [3] 500Tj FWD : 500 track jump (fine search)forward. [4] 500Tj REV : 500 track jump (fine search) reverse. [5] 10kTj FWD : 10k track jump (direct search) forward. [6] 10kTj REV : 10k track jump (direct search) reverse. [7] 20kTj FWD : 20k track jump (direct search) forward. [8] 20kTj REV : 20k track jump (direct search) reverse. [10/0] : All servo off.
2-4. Non EEPROM Write Adjust Non EEPROM Write Adjust 1. 2. 3. 4. 5. 6. Focus Focus Trk. Trk. Trk. EQ Offset Gain Offset Coarse Offset Fine Gain Boost
[1] Focus Offset : Adjusts focus offset. [2] Focus Gain : Adjusts focus gain. [3] TRK. Offset : Adjusts tracking offset of the RF amp
(IC001) side. [5] TRK. Gain : Adjusts track gain. [6] EQ Boost : Adjusts amount of boost of equalizer. [10/0] : All servo off. 2-6. Memory Check Display images are shown as follows, and all two screens are able to switch by the O key (UP) or o key (DW). EEPROM Data 1/2 CD Focus Gain xx Trk. Gain xx Focus Offset xx Trk. Offset xx EQ. Boost xx PI Level xx Fcs. Balance -Jitter xx xx Mirror Time xx FE Level -Traverse Lv1. -Next:DW Default:CLR SL L0 L1 xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx -- -xx -- -xx xx xx xx -xx -- -xx -- -Exit:RET
0.All Servo Off
Exit: RETURN On this screen, each item can be adjusted manually. Select the desired number [1] to [10/0] from the remote commander, and current setting for the selected item will be displayed, then increase or decrease numeric value with the O key or o key. This value is stored in the EEPROM. If CLV has been applied, the jitter is displayed for reference for the adjustment.
EEPROM Focus Trk. Focus Trk. EQ.
Data 2/2 Gain Gain Offset Offset Boost
CDRW DVDRW xx xx xx xx xx xx xx xx xx xx
[1] Focus Offset : Adjusts focus offset. [2] Focus Gain : Adjusts focus gain. [3] TRK. Offset : Adjusts tracking offset of the RF amp
(IC001) side.
[4] TRK. Offset : Adjusts tracking offset of the DSP (IC401)
side. [5] TRK. Gain : Adjusts track gain. [6] EQ Boost : Adjusts amount of boost of equalizer. [10/0] : All servo off. Next:UP Default:CLR Exit:RET
On this screen, current servo adjusted data stored in the EEPROM are displayed. The adjusted data are initialized by pressing the [CLEAR] key, but be careful that they are not recoverable after initialization. Before clearing the adjusted data, make a note of the set data. This screen will also appear if [0]-All is selected in the Drive Auto Adjustment. In this case, default setting cannot be made.
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