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I was very glad recieving the service manal from You. Additionaly very fast. Extremaly nice servicing. Thanks very mach! Now my GX-220 working better, than it was made. Alexander from Moscow, Russia/
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Sweet! I won the item on eBay and couldn't adjust the geometry or even keep a steady picure. This guide has the full schematics (not available anywhere else as far as I could tell), and was a bargain for the wealth of knowledge it contains. I hooked it up to my testing equipment, tweaked a few potentiometers and got it playing videogames in no time. Thanks!
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It was just what I need to fix my old BMW's CD player. Very convenient also. Thank you.
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Great Manual! It contains all the wiring schematics and mechanical exploded views that are essential for service and repair. I was surprised I even found this for such an old machine. Only wish I knew of this site many years ago.
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Great manual very clear copied. You are making an incredible job. I appreciate a lot the rapidity and your efficiency. Thanks a lot
D-EJ855 SECTION 4 ELECTRICAL CHECK
The CD section adjustments are done automatically in this set. In case of operation check, confirm that focus bias. Precautions for Check 1. Perform check in the order given. 2. Use YEDS-18 disc (Part No.: 3-702-101-01) unless otherwise indicated. 3. Power supply voltage requirement: DC4.5 V in DC IN jack. (J401) VOLUME : Minimum AVLS switch : NORM HOLD switch : OFF G�PROTECTION switch : 1
R604 C606 K A R305 + C404 C449 C301 VDR303 FB101 55
Focus bias Check Condition: � Hold the set in horizontal state. Connection:
oscilloscope (AC range) MAIN board TP601 (RF) TP418 (GND) 2k�
+ �
Connecting and Checking Location: � MAIN Board (Component Side) �
Procedure: 1. Connect the oscilloscope to the test points TP601 (RF) and TP418 (GND) on the MAIN board. 2. Set a disc. (YEDS-18) 3. Press the > N button. 4. Check the oscilloscope waveform is as shown below. A good eye pattern means that the diamond shape (�) in the center of the waveform can be clearly distinguished.
VDR101 C102
RF Signal reference Waveform (Eye Pattern)
TP418 (GND)
J301 LINE OUT (OPTICAL)
VOLT/DIV : 100 mV (With the 10:1 probe in use) TIME/DIV : 500 ns
TP601 (RF)
RF level 0.4 to 0.6 Vp-p
D403
R489
1
R410
VDR304
OPTICAL PICK-UP BLOCK DAX-25E
CN503
VDR301
FB201 VDR201
To watch the eye pattern, set the oscilloscope to AC range and increase the vertical sensitivity of the oscilloscope for easy watching.
R303 R304
C605
12
13
C202
C448
R102
R602 R601 C601 R603 C603
C604
IC404
R469
15
1
24
FB301
5. Stop revolving of the disc motor by pressing the x button.
C452 C453 C454
R101
R202 R201
9
9
 $4.99 DEJ855 SONY
Owner's Manual Complete owner's manual in digital format. The manual will be available for download as PDF file aft…
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