Quality scan of the original. All the detail necessary to troubleshoot, repair and adjust the unit. I'm sure I will be downloading more manuals in the future as the need arises.
Well.. I'd searched for this manual and although I found many copies online I was pleased to find your website with a well balanced pricing system and easy to search and follow links. That together with the very quick response time was just what I was looking for.. being a very impatient tech.. ;-) I had the service manual in front of me within a short time.
Bookmarked.. and you can bet I will always come here first for my service & user manuals..
best regards
Ed(Tony) Foley
G7WHK
I will definitely be back for more information when I need it.
Text excerpt from page 20 (click to view)
5-3. CD SECTION
Focus Bias Check This check is to be done when the optical block replaced. Check Procedure: 1. Connect the oscilloscope to test point TP (RF) on CD board. Insert disk (YEDS-18 (3-702-101-01)). 2. Press the u button. 3. Check 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. 4. Release test mode after adjustment is completed. � RF signal reference waveform (eye pattern)
VOLT/DIV : 50mV TIME/DIV : 500 ns (With the 10:1 probe in use) 1.1- 1.3 Vp-p
When observing the eye pattern, set the oscilloscope for AC range and raise vertical sensitivity.
