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Good price, very legible manual, exactly what I needed -- but had to wait a day to actually get the download of the manual. Would have preferred to download it immediately after payment rather than waiting for someone to "process" my order. I was surprised that I had to wait that long.
As the only source for this manual it rather rank quite high since it is well scanned and perfectly readable.
the manual is in good quality and it's in pdf. manual was send in less then 24h.
I would not plug this machine in without finding a manual like this. In addition to setup and normal operating instructions, it has troubleshooting flowcharts, diagrammed mechanical adjustments, and schematics to beat the band. The tech I hand it to would be thrilled to find solder side PCB diagrams with component outlines superimposed, pinouts for every IC chip, and line drawings of transistors, with labeled legs.
As for printing quality, this may be a copy of a copy, but even the finest print when enlarged is very legible. There is a bit of grayed print over a few pages, as if a wet page were placed over it, but the print is still very legible. If you could borrow an original manual and get it printed and bound for 4 to 6 times the cost, you could get better quality. In that case you wouldn't be here. For price, utility, and availability I am rating this manual highly.
I received the Manual in a timely manner and it was exactly what I needed.
This is a perfect copy of the Service Manual, The quality is great. I am very
happy. Thank you
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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