أعطال وصيانة تليفزيون-Repair-TV-NOKIA

TV NOKIA 7163 VT
ch.EUROSTEREO 2
TDKS sweep.
After replacing the missing TDKS synchronization. The audit revealed a low
amplitude pulses output by 12 MC44000: 1,5 volts with respect to 5 volt supply
rail. As a result, the entrance was a small TEA5170 sync pulse amplitude.
Replacement of T830 (VS848S) does not solve the problem. Processor to replace
it was not possible. A small alteration schemes solve the problem -
synchronization has been restored The diagram is not specified 200 ohm resistor
in the collector KT361.

[ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذا الرابط]

Nokia 6352VT
EUROSTEREO 110
Runs exactly 1 second. there is a high voltage, etc. and comes back to
"the duty room." At the same time the LED flashes as a failure.
Indeed proved to be faulty m / s Vertical TDA8170.
On sale was only TDA8172, part analogue, which has had to raise extra.
stabilized voltage source 2.2 V. submitting this naprugu the 7th leg TDA8172.
(From TDA8170 7th leg is not used, because it has a built in power) and so the
same distorted image geometry, which managed to fix the installation capacity
1mkF (the "body" and the 7th leg TDA8172) and the replacement of the
corrective capacity of S405 3 , 3mkF on capacity 1mkF - best approached
non-polar capacitor type KM-6.