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 أعطال وصيانة تليفزيون-Repair-TV-SHARP

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تاريخ التسجيل : 16/06/2010
العمر : 58

مُساهمةموضوع: أعطال وصيانة تليفزيون-Repair-TV-SHARP   الخميس يونيو 17, 2010 1:20 pm

Sharp 70ES-14
No adjustable correction.
After replacing the burned Q506 - 2SD2391 not governed by a pillow. Was to
blame for the zener D516 BZT03C47 (47V 3W). When testing with a multimeter as a
good call, the resistance is completely coincided with a new check can only be
replaced. The defect is apparently typical, met a couple of times. Transistor
2SD2391 a European equivalent BSR41.

SDA 20 561-B547, MC44002P, STV8223A2.
No reception of channels.
The forum and found the circuit and firmware.
Radio channel on STV 8223A2. On the conclusions of 5 and 6 miniature circuit
wired from the tracks. Instead of the core - varicap - "electronic"
Put the downloaded proshivku.V menu bar appears with a key (with the old
firmware it was not) and now the cursor does not want to stand up menu in the
position - to set the channels. Comparing the contents of memory with the
downloaded firmware and home, he found a cell with address

000A and 000B, the contents of which had to be corrected:
000A = 0043 - (Download firmware) in the menu bar with a key setting for
channels blocked
000A = 003E - (old firmware): A string with the key removed, the channels are
000V = 0048 - (older firmware): No reception.
000V = 00E5 - (downloaded firmware) is welcome, but the program skips. Wrote an
average value at random:
000V = 0099 - There is a reception, setting stops, all enrolled program with
excellent quality.

On the geometry of luck - everything is in place. At this done.

Processor TDA9381PS/N2/1I1146
Dark screen, the line flyback, the button does not respond, etc.
Changed the firmware (from 14D2-G) - the same thing. Sewed all the units -
there was "snow" and a few characters in red ... then went into the
duty room. In short - in the 8th leg of the processor gathered a garland of
protection against failure stresses. It was instead 3volt 0.5 - loss of the
upper resistor (623) in the voltage divider 200 in - through the diode (607)
bottom-up resistor (624) put out the voltage on the 8th leg of the processor.
After replacing the resistor, it all went (take care of the native firmware.)
Flash of 14D2-G went too thoroughly but could not check - I did not have

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

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عدد المساهمات : 2402
تاريخ التسجيل : 16/06/2010
العمر : 58

مُساهمةموضوع: رد: أعطال وصيانة تليفزيون-Repair-TV-SHARP   الأحد يوليو 10, 2011 7:44 am

Problem: when you turn the speakers monotonous noise, no start line scan, the
TV can be switched on after 5 -7 minutes and work fine. Nutrition chip TDA8842
6,4 B. Faulty capacitor S712 220.0 x16, has 25mkf R = 15 ohms (ESR). Replaced
with 220.0 x 25 (105 °).

SHARP 21FN1 ch. SP-41

Ingredients: IX2504CE, M52349SP (video, pif, sif, chroma, deflection),
IX2448CEN (memory), UPC1853C, TDA7057Q, LA7837, I X1779CE (MP).

No start-line, red LED, then g asnet in the duty room, when you turn off
audible actuation line (high there). After 2 min, on and off power button the
TV finally turned on and running without any external defect. In a detailed
examination of many "cold" food ration, but they were not the cause
of the problem. Fault lay in the tension undervalued by 10 feet (about 6 volts,
instead of Cool IC801. The fall caused by an increase in resistance obryvnika
R737 MP from 1 ohm to 15 ohm.

"Self-off while watching a DVD." Clarify the following fact-off
regardless of viewing a DVD or TV programs. Locate the source - BP. BP on
TEA2261 and S5586 (menyany). Bp 60Vat light bulb does not turn, increased the
resistance of R718 = 0,36 ohms (should be 0.22Om.)
Parallel soldered R718 0.5 ohms and television clearly earned.

buttons: the network and display the channel. S1006 is a switching service, but
24S04 did not help. Only incremental stress check on proce revealed subsidence
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تاريخ التسجيل : 16/06/2010
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مُساهمةموضوع: رد: أعطال وصيانة تليفزيون-Repair-TV-SHARP   الأربعاء أكتوبر 26, 2011 3:07 am

Sharp 21LV1

Problem: does not respond to buttons on the face, on the remote work only two buttons: the network and display the channel. Switching S1006 is a service, but nothing changed. Measurements have shown impeccable feeds the voltage change 24C04 did not help. Only turn-on voltage test proce identified subsidence of up to 2.5 at 36 Pine. Faulty was zener D1016 (as a normal call).


Sharp 21D2-G chassis GA-1AM

In the words of the client, not included. After opening and adding accelerating clear-narrow horizontal band. Further testing led to broken pin39 UOC-72 Omagh on the ground. After
replacing the CPU on the same-TDA9381PS/N2/1/0747 (IX3368CEN6) became
more interesting programs do not catch, with an AV does not show. In TV mode, the noise in the AV-vertical black columns on a white background, collapsing as if out of sync. The audit revealed, at the tuner instead of 5v only 2,5 v. Blame Q751-C1815, after replacing the power-OK-tuner was restored, the TV has to catch the program. Search the AV showed ragged SMD resistors: R432-82 ohm, R431-100 ohms. After installing the new picture has changed, dark background, her moving diagonally more dark bands. Found
immediately following the R431-pass smd Konder C410-0, 47mF/16v on
pin42 UOC has become the order of 262-267 ohm resistor. After his replacement is an ideal picture in AV, TV, performance fully restored. And such miracles happen after a good storm.


Sharp 29KN1S

Ingredients: power supply consists of a source DR by tr-D
50 Hz and the main power source on the key S4429, S3807, A1015, RS113,
Z0106PE (TPI), voltage doubler (avtoregulyator) STR83145

LA7838 Personnel

UPCHI channel: M52340SP-A, LA7955, TA8216H,

Processor management: IX2759CEN2

HOT: S3886A


VU S4544

The inclusion of RR TV will start up, you hear a burst of
high voltage on the CRT and then goes back to the DR, then spontaneously
start povtoyayutsya cycles. When you add an accelerating visible on the screen by a narrow strip of frames. The voltage at the LA 7838 comes to DC comes in 30, there is half the voltage. At the foot of a cadre of 12 no. Fail stabilizer on board signal processing KIA7812. [ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذا الرابط]


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عدد المساهمات : 2402
تاريخ التسجيل : 16/06/2010
العمر : 58

مُساهمةموضوع: رد: أعطال وصيانة تليفزيون-Repair-TV-SHARP   الأربعاء أكتوبر 26, 2011 3:09 am

Sharp CV-2132CK1 chasis: SP30.

Ingredients: BP D1883 (IX1779CE), personnel IX0640CE, vidioprots TDA8362, IX2321CE controller

came with the TV attempts to engage, green LED is activated and again goes into DR Then that would include the need to unplug and then he will make another attempt to turn. TE I worked on the CPU protection. Details on this occasion there is no disk imaging, although there are hints, ATP-Key s [ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذا الرابط] Of course, if torn off Resistor R521 3.3om * 1/2W can be safely change staffing chip, and if not? How to disable the protection? I had to leaf through old records and look for how to do it, although he found it would be much easier for me.

If 33 percent of the leg appears a protection voltage protection is
activated and shut off until the CPU protection is reliably block chain
start from trying to turn. I'm on this leg appeared at the time the three of. The
old-fashioned, I just cut off that leg, "needle" and left to hang it in
the air, unfortunately in this case protection is always on. For a full-featured off the leg protection must leave the building. To
do this, disable the protection you need vypaykoy R1116 (the resistance
is close to the IR receiver board for PWBF8185PE) Do not forget to
check this voltage from the output of the TPI. For hedging
against defect in a chain of lower-case p-ki instead of resistance R611
12om 10W, 220V lamp to solder in 150W, AC power on is exactly what is
necessary, though serviceable for TV, this lamp will not work, and will
be a bit of incandescence, and the TV will pulsate in a raster mode,
start-stop, but the defense in this case shall not be triggered by 33
foot controller.

So vypayav R1116 and install + B lamp, I turned on the TV, just added the accelerating and saw a narrow strip of frames. Trying
to change the personnel at stupidly TA8427K, did not lead to success,
the tension that comes to staffing, it was about 2 ... 3 volts. Check the supply chain of D502, bursting resistance in this circuit with an ohmmeter revealed nothing. Just
the first thing done, changed the diode D502 and television has earned
in the mode of pulsation, while HR was seen opened, voltage appeared. By connecting all the chains in place, the TV working! Checking
the diode showed that the connected load, it breaks, the ohmmeter
showed slightly underestimated in the ohms resistance of the junction of
the diode.

That's the battle was due to a defective diode kopeck. While looking for more work on their records protection.

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