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- Very good scan quality, PERFECT!
- Sehr gute scan Qualitaet, empfehlenswert!
Wolfgang Sundhaus
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Good site, works ok and you get what you order, no problems experienced, got my manual within a day. A++++
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Original well scanned manual. Got the job done. Microwave problem found & corrected. For $5 and a new magnitron from ebay, it was a cheap and good the first shot fix. Electrical schematics allowed me to mage sure every thing else was ok before cutting and order for parts. Hard to live without.
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I was very skeptical of this website, I have never downloaded manuals before. I put it on the AMEX and payed through Paypal to ensure protection. I got the manual exactly as described and now I can replace the filter capacitor for this amp. Great Price, others selling for 12.99 or more and this is the same manual. I will search out this website for other manuals. Thank you
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Manual was reasonably easy to follow. I am not an engineer or know much about electronics but with the manuals help I was able to figure out the problem, identify the part required for the repair. Replacement part cost around $30. Whilst replacing the part I was telling myself, "this aint gonna work cos it seems far too easy". Took about 15 minutes to do and my plasma TV works a treat. Would never have been able to do this without the service manual.
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 10M� 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 ��� can be clearly distinguished at the center of the waveform.
RF signal waveform
VOLT/DIV : 200mV TIME/DIV : 500ns level : 1.2
+0.25 �0.20
Vp-p
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 3±1 Vp-p.
S-curve waveform
symmetry
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 ± 22%
A Within 3 ± 1 Vp-p B
Traverse waveform
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 : � Try to measure several times to make sure than the ratio of A : B or B : A is more than 10 : 7. � Take sweep time as long as possible and light up the brightness to obtain best waveform. Adjustment Location: BD board
0V
A (DC voltage)
level : 1.3 ± 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.
Traverse waveform
RF Level Check
oscilloscope BD board TP (RF) TP (VC)
0V
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
� 17 �
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