|
|
|
Who's Online
There currently are 6041 guests and
2 members online. |
|
Categories
|
|
Information
|
|
Featured Product
|
|
|
 |
|
|
There are currently no product reviews.
 ;
Veramente completo, dettagliato e perfetto nella visione. Perfect, thanks!
 ;
Fully functional usable service manual. Considering the age of the manual and device quality was better than expected
;
Thank you very much, I've been very happy to find this manual on "Owner Manual". It's a perfect copy and it has been really useful for my work!
;
It took about 24-hours after my payment before I was able to get to the download. Apparently, payment processing is not 100% automated. That is no big deal, just be aware of that going in.
After I got to it, it was in good shape, easy to read, etc. Not some cheap FAX copy looking thing.
Also, this site was the cheapest I found. Another Plus!
;
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.
CD SECTION Note: 1. CD Block basically constructed 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 the oscilloscope with more than 10M� impedance. 4. Clean an object lens by an applicator with neutral detergent when the signal level is low than specified value with the following checks. Focus Bias Adjustment This adjustment is to be done when the optical block is replaced. Adjustment procedure:
oscilloscope (DC range) BD board TP (RF) TP (VC)
+ �
actuate the focus search. (actuate the focus search when disc table is moving in and out.) 5. Check the oscilloscope waveform (S-curve) is symmetrical between A and B. And confirm peak to peak level within 2.4 ± 0.7 Vp-p.
S-curve waveform symmetry
A within 2.4 ± 0.7 Vp-p B
6. After check, remove the lead wire connected in step 2. Note: � Try to measure several times to make sure that 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. RF Level Check
oscilloscope BD board
1. Connect oscilloscope to test point TP (VC) and TP (RF) on BD board. 2. Ground display board IC701 pin @¢ with the lead wire. 3. 4. 5. 6. Turned power switch ON. (Stop mode) Put disc (YEDS-18) in and press the ^ button. Press the ^ button again. (Tracking servo ON) Adjust RV101 so that the oscilloscope waveform is as shown in the figure below (eye pattern). A good eye pattern means that the diamond shape (�) in the center of the waveform can be clearly distinguished. 7. Remove the lead wire connected in step2. � RF signal reference waveform (eye pattern)
VOLT/DIV: 200 mV TIME/DIV: 500 ns
TP (RF) TP (VC)
+ �
Procedure: 1. Connect oscilloscope to test point TP (VC) and TP (RF) on BD board. 2. Turned Power switch on. 3. Put disc (YEDS-18) in and press the ^ button. 4. Confirm that oscilloscope waveform is clear and check RF signal level is correct or not. Note: Clear RF signal waveform means that the shape ��� can be clearly distinguished at the center of the waveform.
RF signal waveform
VOLT/DIV: 200 mV TIME/DIV: 500 ns level: 1.3 ± 0.3Vp-p
level: 1.3 ± 0.3Vp-p
When observing the eye pattern, set the oscilloscope for AC range and raise vertical sensitivity. S-Curve Check
oscilloscope BD board TP (FEO) TP (VC)
+ �
E-F Balance (Traverse) Check
oscilloscope (DC range) BD board TP (TEO) TP (VC)
+ �
Procedure: 1. Ground display board IC701 pin @¢ with the lead wire. 2. Connect oscilloscope to test point TP (TEO) on BD board. 3. Turned Power switch on. 4. Put disc (YEDS-18) in and press the ^ button. 5. Confirm that the oscilloscope waveform is symmetrical on the top and bottom in relation to 0V, and check this level.
Procedure: 1. Connect oscilloscope to test point TP (VC) and TP (FEO) on BD board. 2. Connect between test point TP (FOK) and Ground by lead wire. 3. Turned Power switch on. 4. Put disc (YEDS-18) in and turned Power switch on again and
� 12 �
|
|
|
> |
|
