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 ;
the manual is in good quality and it's in pdf. manual was send in less then 24h.
regards
mike
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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.
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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
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exactly as they say. Within 24 hours the link to the pages and offcourse it was the right service manual. Super and thanks
 ;
The manual was exact the thing that was promised. My old car stereo is working again thanks to the information supplied.
Focus/Tracking Gain Adjustment A servo analyzer is necessary in order to perform this adjustment exactly. However, this gain has a margin, so even if it is slightly off, there is no problem. Therefore, do not perform this adjustment. Focus/tracking gain determines the pick-up follow-up relative to mechanical noise and mechanical shock when the 2-axis device operate. However, as these reciprocate, the adjustment is at the point where both are satisfied. � When gain is raised, the noise when 2-axis device operates increases. � When gain is lowered, it is more susceptible to mechanical shock and skipping occurs more easily. This adjustment has to be performed upon replacing any of the following parts : � Optical pick-up � RV503 (Focus gain) � RV502 (Tracking gain) Normally, be sure not to move RV503 (focus gain) and RV502 (tracking gain). � Focus Gain Adjustment � Procedure : This adjustment is not performed. If focus gain RV503 is turned, set to mechanical center. � Tracking Gain Adjustment � (perform at normal operation) [MAIN BOARD] (Side B)
1. Place the optical pick-up level, horizontally. (If the optical pickup is not level, the 2-axis device will be weighted and adjustment cannot be done.) 2. Connect the oscilloscope between IC501 0 pin (TEO) and #º pin (VC) on the MAIN board. 3. Set the disc (YEDS-18) and Press the ^ (+) key. 4. Turn RV502 slightly clockwise (tracking gain drops) and obtain a waveform with a fundamental wave (waveform has large waves) as in Fig. 1 . 5. Turn RV502 slowly counterclockwise (tracking gain rises) until the fundamental wave disappears (no large waves) as in Fig. 2. 6. Set RV502 to the position about 30°counterclockwise from the position obtained in step 5. If RV502 contact point is more than 90° counterclockwise from mechanical center, tracking gain is too high. In this case, readjust from step 4. 7. Press ^ (+) or = keys and observe the 100 track jump waveform. Check that no traverse waveform appears for both ^ (+) or = directions. (See Fig. 3 and 4.) It is acceptable if the traverse waveform appears only now and then, but if it appears constantly raise tracking gain slightly and check step 7 again. 8. Check that there is no abnormal amount of operation noise (white noise) from the 2-axis device. If there is, tracking gain is too high, readjust starting with step 4. The waveforms are those measured with the oscilloscope set as shown below. � VOLT/DIV : 50mV � TIME/DIV : 5mS � Waveform when tracking gain lowered. Fundamental wave appears (Large amplitude appears.)
0V
oscilloscope (DC range) IC501 !º pin (TEO)
+ �
Fig. 1 � Waveform when fundamental wave disappears (Large amplitude does not appear.)
0V
IC501 #º pin (VC)
Fig. 2 � Waveform when no traverse waveform during 100 track jump. (Brake application is smooth because of adjustment.)
IC501
0V
30 10
100 track jump waveform
Fig. 3
� Waveform when no traverse waveform during 100 track jump. (Brake application is poor because of adjustment.)
0V
100 track jump waveform traverse waveform
Fig. 4
� 10 �
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