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thank u so much for this manual that was so cheap that i thought it was a scam but i gambled anyway because it was too good of a deal to pass up and behold,the manual has everything and details of everything even the screws and im still amazed and very happy with my manual .so take my word and jump on it before they realize how cheap they selling thier manuals..thank you so much for taking time to read my thoughts
I do not have very much to say.
The price is quite covenient, delivery was better as promised (about 12 ours, against the specified 24 hours if I remember well), and the quality of the PDF is more than acceptable.
The Service Manual of Sansui R30 itself is also satisfactory: good graphic for schematics and layouts, simple and well structured.
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.
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.).
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.
6-2. ELECTRICAL ADJUSTMENT
Note: 1. CD Block is basically designed to operate without adjustment. Therefore, check each item in order given. 2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated. 3. Use an oscilloscope with more than 10Mâ¦ impedance. 4. Clean the object lens by an applicator with neutral detergent when the signal level is low than specified value with the following checks. S-Curve Check
oscilloscope BD board TP (FE1) TP (VC)
Note: A clear RF signal waveform means that the shape âââ can be clearly distinguished at the center of the waveform.
RF signal waveform
VOLT/DIV : 200mV TIME/DIV : 500ns level : 1.2
Adjustment Location: BD board E-F Balance Check
oscilloscope BD board TP (TE) TP (VC)
Procedure : 1. Chuck the disc (YEDS-18) beforehand, and disconnect the power cord from the outlet. 2. Connect oscilloscope to test point TP (FE1) on BD board. 3. Connect test point TP1 (ADJ) on MAIN board to ground with lead wire. 4. The ADJ mode is set when the power cord is inserted into the outlet and power is supplied. 5. The fifth track is played automatically. 6. Press the CHECK button. 7. Check the oscilloscope waveform (S-curve) is symmetrical between A and B. And confirm peak to peak level within 3Â±1 Vp-p.
Procedure : 1. Chuck the disc (YEDS-18) beforehand, and disconnect the power cord from the outlet. 2. Connect oscilloscpe to test point TP (TE) on BD board. 3. Connect test point TP1 (ADJ) on MAIN board to ground with lead wire. 4. The ADJ mode is set when the power cord is inserted into the outlet and power is supplied. 5. The fifth track is played automatically. 6. Press the GROUP 3 button. (The tracking servo and the sledding servo are turned OFF.) 7. Check the level B of the oscilliscope's waveform and the A (DC voltage) of the center of the Traverse waveform. Confirm the following : A/B x 100 = less than Â± 22%
A Within 3 Â± 1 Vp-p B
Center of the waveform B
8. Pressing the 1/u button stops the output of the waveform (s curve). 9. After check, remove the lead wire connected in step 3. Note : â¢ Try to measure several times to make sure than the ratio of A : B or B : A is more than 10 : 7. â¢ Take sweep time as long as possible and light up the brightness to obtain best waveform. Adjustment Location: BD board
A (DC voltage)
level : 1.3 Â± 0.6 mVp-p
8. Press the GROUP 8 button. (The tracking servo and sledding servo are turned ON.) Confirm the C (DC voltage) is almost equal to the A (DC voltage) is step 7.
RF Level Check
oscilloscope BD board TP (RF) TP (VC)
C (DC voltage)
Procedure : 1. Connect oscilloscope to test point TP (RF) on BD board. 2. Turn Power switch on. 3. Put disc (YEDS-18) in to play the number five track. 4. Confirm that oscilloscope waveform is clear and check RF signal level is correct or not.
Tracking servo Sledding servo OFF
Tracking servo Sledding servo ON
9. Disconnect the lead wire of TP1 (ADJ) connected in step 2. Adjustment Location: MAIN board
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