|
|
|
Who's Online
There currently are 6043 guests online. |
|
Categories
|
|
Information
|
|
Featured Product
|
|
|
 |
|
|
There are currently no product reviews.
 ;
This manual is very useful because it presents the technical specifications of the cd player, including the manufacturer of the reader, this helps if you need to replace it. It also displays the settings and layout of the circuit.
;
Manual was a good representation of service infomation for the EWV404. It worked well for my repair.
 ;
Great quality copy, right what I was looking for, all I need to fix my radio.
Thanks
;
I BOUGHT A PAIR OF INFINITY VINTAGE SPEAKERS THAT REQUIRED TO BE REPAIRED AND THE ELECTRONIC TECHNICIAN ASKED ME FOR THE SERVICE MANUAL.
I TRIED TO GET IT AT THE MANUFACTURER'S SITE WITH NO SUCCESS, SO I STARTED TO LOOK FOR IT IN THE WEB FOR A LONG TIME, UNTIL I FOUND THE SERVICE MANUAL IN THIS EXCELLENT SITE "OWNER'S MANUAL.COM".
NOW I HAVE MY SPEAKERS WORKING AND ENJOYING THE MUSIC I LIKE.
THANKS TO "OWNER`S MANUAL.COM" I RECOMMEND THIS SITE TO EVERYONE.
;
Very quick response. Very good and accurate print quality of the scanned document.
SECTION 5 ELECTRICAL ADJUSTMENTS
Notes: 1. CD block basically constructed to operate without adjustment. Therefore, check each item in order given. 2. Use YEDS-18 disc (Part No.: 3-702-101-01) unless otherwise indicated. 3. Use the oscilloscope with more than 10 M� 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. S-Curve Check Connection:
BD board TP2 (FE) TP (VC)
+ �
RF signal waveform VOLT/DIV: 200 mV TIME/DIV: 500 ns (with the 10: 1 probe in use) level: 1.2 +0.25 Vp-p �0.20
FOCUS/TRACKING GAIN ADJUSTMENT VR in optical block is not adjusted. As this gain has a margin, normally a little shift of gain will not cause a problem. If you happened to move VR and you are not sure the original position, set it to the mechanical center. Adjustment Location: [BD BOARD] � Side B �
CN103
oscilloscope
When observing the eye pattern, set the oscilloscope for AC range and raise vertical sensitivity. E-F Balance (Traverse) Check Connection:
oscilloscope (DC range)
CN102 TP4 (TE) TP2 (FE) TP (VC)
CN105 TP5 (TEI) TP1 (RFO)
Procedure: 1. Connect the oscilloscope to TP2 (FE) and TP (VC) on BD board. 2. Connect the TP3 (FEI: IC101 pin @ª) and TP (VC) with lead wire. 3. Turned power switch on. 4. Put disc (YEDS-18) in and turned power switch on again and actuate the focus search. (actuate the focus search when disc table is moving in and out.) 5. Confirm that the oscilloscope waveform (S-curve) is symmetrical between A and B. And confirm peak to peak level within 3.0 ± 1.0 Vp-p.
S-curve waveform
BD board TP4 (TE) TP (VC)
+ �
IC102
IC351
TP13 (XPLCK)
Procedure: 1. Connect the TP18 (ADJ) to ground and TP5 (TEI: IC101 pin @¶) to TP (VC)with lead wire. 2. Connect the oscilloscope to TP4 (TE) and TP (VC) 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 A Vdc, and check this level.
Traverse waveform
IC361 TP18 (ADJ)
symmetry
A
within 3.0 ± 1.0 Vp-p
A B Symmetry
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 Connection:
oscilloscope (AC range) BD board TP1 (RFO) TP (VC)
+ �
A/B � 100 is ± 20 % or less.
level: 1.3 ± 0.7 Vp-p
6. After check, remove the lead wire connected in step 1. RF PLL Free-run Frequency Check Connection:
frequency counter + �
BD board TP13 (XPLCK)
Procedure: 1. Connect the oscilloscope to TP1 (RFO) and TP (VC) on BD board. 2. Turned power switch on. (stop mode) 3. Put disc (YEDS-18) in and press the ( button. 4. Confirm that the 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.
Procedure: 1. Connect the frequency counter to TP13 (XPLCK). 2. Turned power switch on. 3. Put disc (YEDS-18) in and press the ( button. 4. Confirm that the reading on frequency counter is 4.3218 MHz.
� 13 �
� 14 �
|
|
|
> |
|
