|
|
|
Categories
|
|
Information
|
|
Featured Product
|
|
|
 |
|
|
There are currently no product reviews.
 ;
The service manuel is very helpful, we where able to restore the device to its working operation again.
;
Great quality complete service manual!!! complete parts list and drawings
;
Again a great job. I never been disilluted from them! Clear scheme, complete and very good for repairing!
;
Great manual just what I needed, great service as always, thanks.
;
Great quality complete service manual! complete parts list and drawings. Thanks!
XP-ZV1 SECTION 4 ELECTRICAL CHECKING
The CD section adjustments are done automatically in this set. In case of operation check, confirm that RF level. 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. (J101) VOLUME button : Minimum HOLD switch : OFF RF Level Check Condition: � Hold the set in horizontal state. Connection:
oscilloscope (AC range)
MAIN board TP507 (RF) TP521 (RFGND)
+ �
Checking Location: � MAIN board (SIDE B) �
Procedure: 1. Connect the oscilloscope to the test points TP507 (RF) and TP521 (RFGND) on the MAIN board. 2. Set a disc. (YEDS-18) 3. Press the u 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.
RF Signal reference Waveform (Eye Pattern)
TP521 (RFGND)
VOLT/DIV : 100 mV (With the 10:1 probe in use) TIME/DIV : 500 ns
RF level 0.8 to 0.95 Vp-p
CN501
To watch the eye pattern, set the oscilloscope to AC range and increase the vertical sensitivity of the oscilloscope for easy watching.
TP507 (RF)
5.
Stop revolving of the disc motor by pressing the x button.
IC402
11
|
|
|
> |
|
