DAEWOO DMQ-2172, chassis
CP-330
Problem: When the sound is a raster (add uskoryaeschego see the mountains.
Lane). On examination it was found that the loss of the capacity of S414 (4 pin
TDKS normal stress on that leg should be about 120V) voltage from the secondary
TDKS have been overstated. As a result, out of service personnel IC TDA3653B,
S416, S543, S312, S309.Posle replacement TV to work, but it turned out that the
small vertical size. If you try to increase the size of the vertical
potentiometer broken linearity (top compressed). Were tested in all capacities
trim frame, and then replaced by the regulators and the size of the vertical
alignment (VR301, VR302, R313) as working at prozvanivatsya. The image was
normal.
DAEWOO DTX-21Q2TK, ch.SR-375
If you do not run vkyuchenii line scanning, the LED flashes Stand-by. Since
there is no command processor 12 including a stabilizer for TDA8138. Revealed
underestimation of pulse amplitude on SDA processor DW370M3 (about 2c). Were in
the protective zener leakage around the VPU TDA8374A-D511, D512 (6V2).
Daewoo DMQ1457 sh.S-50N
Zipper does not look like just burnt out on all the 12V + percent:
M34300-230SP, TA8659AN, DBL2044, both low input optocoupler, D710, 998, 102,
Q706, 703, 404, 110, 193. TD4053 exploded along the tracks to replace
plate.Posle indicate the elements are all OK.
DAEWOO KR29M2-MTO, ch.CM905S
High brightness and reversal of the beam. I901-TDA6107Q faulty and resistor
R407 on the power supply circuit of this chip. After replacing these elements
appeared normal picture, but it turned out the following: When I try the TV to
standby mode screen is reduced in violation of the frame sync and the screen
gets dark and off the network light. After that, you can turn on the TV only
de-energize the machine or network switch by removing the plug. From the words
of the owner in this mode the TV worked for about a year. Measurement modes
revealed - power supply unit provides 132 volts instead of 145. PWM controller
is faulty - DPM011TIA. New microassembly can not find and had to restore
faulty. The reason - to change the parameters of the optocoupler. Set opropary
NEC 2561 fully recover the micro, but the work unit for a year with the
afterburner impact on kinescope. Adjustment in service mode managed to get a
satisfactory picture.
Daewoo DMQ-2195TXT chassis CP-330
Deffekt old, but I want to cite it as an example for beginners repairmen.
The unit came with a horizontal stripe, there is no vertical refresh. Checking
modes showed no power TDA3653B - R422 3.3 ohm ragged on 2W +25 V, then
according to the standard - check the diode, the resistance to the body -
within norm, replacing R422, made the inclusion of a trial - the resistor heats
up and smoke - is faulty TDA3653B. Here we change it, turn on the TV ..... and
a new chip immediately goes down. Re-fed to the personnel and measure its power
without a load - 50V!!! At this point, explodes S414 22.0h160V capacity,
standing in the 4th leg TDKS on the hull. It was her fault is not in line-mode
and inflated secondary naprugi betrayed. After replacing the power supply
capacity returned to normal, 30V without load, re-replaced TDA3653B - it worked
beautifully ...
[ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذا الرابط]
Daewoo 21A5T, chassis cp-375
After turning the image on all channels poorly configured, the meter - just
black and white, no sound, only the noise of variable intensity. The reason -
no TV in the spare parts for receiving SECAM. Was replaced by the SAW filter
for G1966 K2955, in the empty space on the motherboard, 6.5 MHz crystals,
delivered decoder SECAM TDA8365. All at once appeared, additional adjustments
through the service console is not needed.
Daewoo DMQ-2057 ch. C-50N
Percent M34300-230SP. When you turn on OSD is, the channels are switched, TV
and video, too, but like AV or noise on the screen, no sound, only a gray
screen. On all the buttons on the front panel responds appropriately. Replaced
litas in BP, and the line. Checked for leakage diodes in percent (that leaks
found Old) on the pin 28 percent to 4.5 V under the scheme. Voltages of 103,
12.5 in - normally, LTL changed. Replaced switch video inputs 4053, desoldering
and replacement LZYAS. At the very first time after 6-7 seconds. appeared
normal picture and sound are turned off and all died away. With video-on LF are
OK.
The reason K / W Lt S113 - 1000uF/16V, a feeder canal UPCHI not tipovuha, but
may be useful to someone.
Daewoo 2195TXT, DMQ-2075 chassis CP-330.
Carried, to my shame, for the first time confronted with this chassis in
spacing ..
Came with the application, "something slammed" and went out.
Blown literature on B + (C822).
Replacing a lot of LTL (tipovyh..) Propayka.
PSU starts up, squeak, quick disconnect., Literature on C822 = 200V!
Culprit C814, leak, only replacement 1mkf/50v.
DAEWOO DMQ2057
Fault: No picture, OSD has not long ago was the same, so I decided to write. On
the breakdown of s113 [1000mf/16v], the circuit 12c, is worth close to the
radio unit. Surprisingly good but the picture tube.
DAEWOO DCT21S4G
Ingredients: LC863332A 5S10, LA76810A.
Problem: no SECAM - cured by firmware STRIKE
موضوع: أعطال وصيانة تليفزيون-Repair-TV-DAEWOO 