|
|
|
Categories
|
|
Information
|
|
Featured Product
|
|
|
 |
|
|
There are currently no product reviews.
 ;
Yes thank you i got the file i was after. There was a slight problem in my communication but it all worked out well.
A job well done.
 ;
Great manual...really saved me. The only problem is that I thought I would be able to download it directly when I paid for it but never received the download instructions until the next morning. The board trace pages were somewhat light also: really need to turn up the contrast on the printer before printing them. The schematic page was great; very clear! Well worth the money.
;
I've been in the electronic business for a long time. I used to buy Sam's Photofact for my needs which intailed having to go to the store and paying about $20 for a package of 3 different units so I was forced to buy more than I needed just to get one.
Owner manual is just at your keyboard and the information is almost instantansouly and the cost is very reasonable. Easy to print out if needed or simply read off of the screen. The larger the screen the better for obvious reasons.
;
Very good manual, at a very good price. Received in a timely manner
;
Only thу cover has poor quality, internal material has excellent quality - exactly what I needed
Thanks!
GB 32
� � �
5.
EM3E
Service Modes, Error Codes and Fault Finding
� �
�
Replace FET 7504 and zener 6505. Remove the SSB panel. Short B and E of TS7529, in order to put the Main Supply in �on�-mode (TS7529 is blocking then). Caution: To prevent that this will damage R3403 and TS7443, first disable the HW-protection of the deflection circuit. Therefor short circuit C2642 on the LSP (diagram A4) Attach a load of 500 W to VBAT capacitor C2515 (the supply can not work without a minimum load). Use a variac, and slowly increase the VMAINS. Measure over sensing resistors R3514//15 if a nice sawtooth voltage becomes available. Also measure the VBAT . This may never exceed +141 V. If it does, there is something wrong in the feedback circuitry (e.g. regulator 7506).
�
Note: Be careful when measuring on the gate of FET TS7504. This circuitry is very high-ohmic and can easily be damaged (first connect ground to measuring equipment, than measure the gate).
5.8.6
Standby Supply The simplest way is to replace the components of the Standby Supply with repair kit 3122 785 90320.
5.8.7
Line Deflection The simplest way is to replace the components of the Line Deflection circuitry with repair kit 3122 785 90330.
5.8.8
Frame Deflection Caution: When the Frame Deflection circuitry is suspected, one must be careful. Because there is a DC-voltage on the frame deflection, the beam current could damage the CRT neck, leading to a defective CRT. Best thing to do is: 1. Interrupt the resistors 3403 and 3404 on the CRT panel (diagram F), in order to remove the �filament� voltage from the tube (no beam current, so no chance of destroying the CRT). 2. Interrupt resistor 3403 on the LSP (diagram A4) to disable the �SUP-ENABLE� line. 3. Measure with a multimeter, or better with a oscilloscope, the functionality of the Frame stage. 4. After you�ve found the cause, exchange the defective component (e.g. TDA8177), and re-solder the interrupted resistors.
|
|
|
> |
|
