|
|
|
Who's Online
There currently are 6021 guests online. |
|
Categories
|
|
Information
|
|
Featured Product
|
|
|
 |
|
|
There are currently no product reviews.
 ;
Perfect copy of a necessary document and my Sonic Modulator is repaired!
;
Excellent replacement for original Manual. Worth every cent ! I am totally satisfied!
;
Only in this place I could find this manual. Very complete and very clear. PDF is a very good quality and easily read. Thank you. I was very useful.
Videoson & ltd.
;
It is great, it saves money and paper. It helps me to save room and recources.
;
manual service is ok , resolve the problems
manual service is ok , resolve the problems
manual service is ok , resolve the problems
manual service is ok , resolve the problems
manual service is ok , resolve the problems
CMT-A50/A70
CD SECTION
Note: 1. Perform all CD section check in the CD Test Mode. (Refer to page 16) 2. Use the PATD-012 disc (Part No.: 4-225-203-01). 3. Use an oscilloscope with more than 10 M� impedance. 4. Clean the object lens by an applicator with neutral detergent when the signal level is low than specified value with the following checks.
Checking Location: � CD Board (Conductor Side) �
TRAVERSE CHECK
oscilloscope (DC range) CD board TP (TE) TP (VC) + �
TP (TE) TP (RF) TP (VC)
Procedure: 1. Connect an oscilloscope to TP (TE) and TP (VC) on the CD board. 2. Load the disc (PATD-012). 3. Press the three buttons of x , [MODE/DIR] and [CLOCK] simultaneously to enter the CD Test Mode and display �88� (Initial mode). 4. Press the CD u button to enter the FOCUS1 mode and display �F-�. 5. Confirm that the center level of waveform is 0 V. 6. Confirm that the Vp-p value of waveform is 0.35 to 1.1 V.
VOLT/DIV: 0.2 V (with the 10:1 probe in use) TIME/DIV : 1 ms
IC702
0V
Vp-p
FOCUS BIAS CHECK
oscilloscope (AC range) CD board TP (RF) TP (VC) + �
Procedure: 1. Connect an oscilloscope to TP (RF) and TP (VC) on the CD board. 2. In the FOCUS1 mode, press the CD u button to enter the ALL SERVO mode and display �P-�. 3. Confirm that the oscilloscope waveform is as shown in the below figure. (eye pattern) A good eye pattern means that the diamond shape ��� in the center of the waveform can be clearly distinguished.
VOLT/DIV: 0.2 V (with the 10: 1 probe in use.) TIME/DIV: 200 ns
0.6 to 1.2 Vp-p
When observing the eye pattern, set the oscilloscope for AC range and raise vertical sensitivity.
CMT-A50/A70
19
19
|
|
|
> |
|
