أعطال وصيانة تليفزيون-Repair-TV-AKAI

AKAI
CT-2119/14/20/21WKD - repair loop demodulator
AKAI TV-based video processor with off AN5195K radio channel. Fault appears as
a very strong distortion of the "Pictures" as a negative image
silnozashumlennogo Paulsen beats. Accordingly, it is impossible to configure a
TV and no sound. Hit a device to "superspetsu", which would
complicate the picture of his magic and manipulation to diagnose such a device
would be very difficult.
The culprit for this behavior was a tubular channel Conder who reduced
capacity. Conder integrated circuit in the demodulator and now it needs to be
carefully removed with a sharp object destroyed the ceramic body. Instead, it
must be soldered by printing to the extreme conclusions of the circuit ceramic
capacitance 12pF. There is due to extreme conclusions in a series circuit where
the three of them. Next, you need to adjust to the contour of the stations in
search mode, stopping the search took place at fine-tuning to the received channel.
Or set of instruments.

Akai CT-G 215D
No color in SECAM.
Ingredients: TDA8362, TDA4665, TDA8395.
Break all outside TDA8395 and foolish to change it and TDA4665, began to look
for tracks. Everything seems to be fine, except one: the video for the 16th leg
of TDA8395 is a capacitor rather than directly, as the scheme on the 27th leg
of TDA8362. More interesting. The other foot on the tracks that Conder is on
the 9th leg TC4053, that is, SECAM video signal is switched to a TC4053. Why?
It is not clear!
After replacing the TC4053 everything went as it should be. A scheme Akai CT-G
215D, I have not found even on the Internet. Because of this, three times to
the owner of the house went. Still, the right scheme - this is 75% of the
successful repair!

AKAI CT2005EA
Ingredients: TMP47C434N - microcontroller, AN5633 - SECAM, AN5601K - color
processor, TDA8192 - Switch Sound, TDA1904 - ULF, LA7830 - KR, FCM-20A016 -
line transformer, UVE30-R02-tuner, D1555-line transistor, D1402-BP.
When you turn there is no sound, there is only thirty minutes. No OSD on a
vertical sync.
When checking the voltage on the k.15 TDA8192 (locked audio), it slowly rises
from 0.1 to 5-6 in the appearance of the sound. Proved to be defective Ñ125
10.0 h16v (high ESR). After replacing the voltage blocking sound rose 11.5 dl
and the sound comes right after you turn.
The microcontroller (k.27) does not come with the clock staffing LA7830,
although the output m / CD schemes are available. It turned out that the track
between R414 and R650 in the chain of human clock up about eight inches there
is reason to stress + 16.5. I had to cut a track and throw the jumper. OSD
synchronization is restored.


AKAI CT-21WKD - No information is displayed OSD.

The inspection revealed faulty processor KWMCC - On the 22th leg there
is a normal human resource pulse (5V), the 32nd row of the pulse amplitude of
the foot is planted to 1V - formation OSD impossible ...
Defect corrected increase in load capacity circuit HSYNC - to break the chain
contains an additional emitter follower, the pulse amplitude at the 32nd leg
increased to 4.5V, the schedule is stable ...
Due to the scarcity and high cost KWMCC thus "cured" for
several TV ...

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

Akai CT-G2144E Ingredients: Processor
(UOC)-8821CPNG4NC8; HR-AN5522; Tuner-ET-5C1E-CV200K; TDKS 25-BSC-Z720;
HOT-C5296; Power trans-p BS-C5297; screen lights up, but instead of the image
bright-expressed " tree "structure of the raster, sound
normalnyy.Osmotr chassis revealed a slightly swollen, electrolytes (for
de-energized chassis hold your finger on the problem of electrolyte-butt and
feel the bulge butt): C561 (10mfx160v) and C562 (22mfx250V). I myself made the
ESR-top box (Fin . costs around $ to your arrow TS4342-M1-checked quickly
and surely other electrolytes, "kiataezy", oddly enough, were
poryadke.Itak, replaced two of the electrolyte, soldered ring Emerging
treschiny.Normalnaya work vosstanovilas.Rekomenduyu TV all in one form or
another to get ESR-meter-GREAT thing!

In the famous
AKAIvskom BP (Scheme
of the PSU is not just in AKAI), if burned power switch and
resistance in the emitter it, except to replace Conder diode on power supply
scheme of stabilization. Tester calls it normal, but if not replaced can all
happen again. There have been cases, the TV can work from 3 days to six months,
and then all repeated.

AKAIevsky BP (In my case, the model 2107D) with the same fault as in the previous
post - loss of the diode on the food chain site stabilization and restoration
of PP onnogo for continuity, but led to a short-term due to punching NOTE
overstatement + B. Defect and walking time from weeks to years and was
localized to the use of lavinnika + B. Treatment of the same - the replacement
of suspicion despite a normal a dial.

AKAI CT-21WKD
chassis B20
On the screen wide dark horizontal stripes, the nature of which varies
depending on the subject. It is treated by replacing S436 in the chain of ABL.

TV AKAI CTG2122E chassis
TV-2K
B + too high in the duty room in the operating mode, all normal. When turning
off the TV remote control (DR) are beginning to throb output voltage power
supply, particularly in the jumps up to + 170 V, after which triggered the
protection, the LED flashes, the sound of clicks characteristic of PD. If the
DR load lamp power supply - everything is back to normal. "Culprit"
was the S531, which costs between the two rectifying diodes in the + on the
ground. Par - 0.01 uF. He was a cliff.
The case concerns a TV version of the PSU to the PWM 3S0765RF