Repair Tips
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Results: 88099
Results: 88099
| Make | Model | Symptom | Problem | Solution | By |
|---|---|---|---|---|---|
| LG |
37LH35FD
|
Image shaking until the screen locks and loses functions | Causes capacitors (c 889 and c 814) both of 330uf. | Just replace them both, I replaced them with 330μF x 10v and the problem was solved | Elias |
| GRADIENTE |
TV2920
|
Closed horizontal | Capacitor c-411 560nf x 200v exhausted or open | Replacement! | Edmaster |
| SAMSUNG |
BN44-00259A BN44-00262A BN44-00260A BN44-00289B BN44-00261A BN44-00291A
|
No power to backlight caused by diode on ip board. | Change dp805 (from mur360 to 31gf6) diode (rectifier 600v 3a) on ip board. | SEUK Technical Support | |
| AIWA |
NSX-S70, NSX-A74, NSX-S90, NSX-S74, NSX-F9, NSX-F12, NSX-F15, Z-R710, Z-R800, Z-R900
|
Disarms when turning on the on/off button | Check protection circuit. excess current detector (q213 and q214). dc detector in the intermediate stage (q106 and q107). ac voltage failure detector (q108 and q109). | Eduardo Marques | |
| AIWA |
NSX-S70, NSX-A74, NSX-S90, NSX-S74, NSX-F9, NSX-F12, NSX-F15, Z-R710, Z-R800, Z-R900
|
Disarms when turning on the on/off button | Check resistors r287 and r288 (SMD 39ω) and r215, r216, r291, r292 (SMD 100ω) | Eduardo Marques | |
| AIWA |
NSX-S70, NSX-A74, NSX-S90, NSX-S74, NSX-F9, NSX-F12, NSX-F15, Z-R710, Z-R800, Z-R900
|
Disarms when turning on the on/off button | Check that the protection terminal has a voltage of 4 volts | Eduardo Marques | |
| AIWA |
NSX-S70, NSX-A74, NSX-S90, NSX-S74, NSX-F9, NSX-F12, NSX-F15, Z-R710, Z-R800, Z-R900
|
Disarms when turning on the on/off button | Check that transistors q101 and q102 have 12 volts on the side plate (standby voltage) | Eduardo Marques | |
| AIWA |
NSX-S70, NSX-A74, NSX-S90, NSX-S74, NSX-F9, NSX-F12, NSX-F15, Z-R710, Z-R800, Z-R900
|
Output burnt out or device does not turn on. | Check the output transistors (they are shorted), check the polarization diodes and the 0.15 ω/2watt resistors connected to the emitters | Eduardo Marques | |
| AIWA |
NSX-S70, NSX-A74, NSX-S90, NSX-S74, NSX-F9, NSX-F12, NSX-F15, Z-R710, Z-R800, Z-R900
|
Output burnt out or device does not turn on. | Check fets q219 and q220 (2sk2723) can be replaced by buk444-500 | Eduardo Marques | |
| AIWA |
NSX-S70, NSX-A74, NSX-S90, NSX-S74, NSX-F9, NSX-F12, NSX-F15, Z-R710, Z-R800, Z-R900
|
Output burnt out or device does not turn on. | Check pr201, pr 202 (side plate resistors) | Eduardo Marques | |
| AIWA |
NSX-S70, NSX-A74, NSX-S90, NSX-S74, NSX-F9, NSX-F12, NSX-F15, Z-R710, Z-R800, Z-R900
|
Output burnt out or device does not turn on. | Check pr001, pr002, pr005 and pr006 (transformer board fuses) | Eduardo Marques | |
| PHILCO |
PH28S63D
|
Sound failing when increasing | Smd transistor q3. on the main board. 12 volts from the audio ci keeps oscillating. | Ozatec electronica sarandi / pr 12/23/2019 | OZATEC ELETRONICA SARANDI / PR |
| PHILCO |
PH49F30D
|
Does not light backlight | Vw10 or vw09 shorted diode. | Replace | Hndrsn |
| AOC |
LE42H57D
|
Shows stand-by, when activated it then turns off. voltage for unstable backlight. | Broken ferrite transformer (t901) | Replace the transformer (t901) and capacitors (c916, c917, c918 and c9103) 39μF x 160v | Adilson SP |
| LG |
CM-9730
|
Switching off with the perfect outputs | Rp-701 (in the dc detect protection stage) | Make the replace | Fofao eletrônica estância |
| AOC |
LE43S5970
|
No image on the right side. | Got the screen wet. the water ran down and wet the v-com plate. severe oxidation on the flats from t-com to v-com. cleaning the terminals and replacing the flats. | In addition to the repair, I lowered the LED current to avoid problems with the customer. I removed the power supply resistors r8602 and r8607 (1r2 and 1r3). the measurements went from 21.35v and 357ma to 20.85v and 232ma. | Eletrônica R-Tec |
| OLG |
HT306SU
A2 |
Turns on with locked functions | It works but no sound comes out CD also doesn't work | First execute resolve no ic 502 | nadobom |
| MONDIAL |
D-15
|
The DVD turns on with the red LED, the LED does not turn green, just red and does not read the CD. | Video card | Replace the video card and just run for a hug! | Sinailson furtado |
| LG |
32LY340C
LB4CA |
Device without image and with audio. | Back light bars with damaged LEDs. the entire central bar and one of the bottom bar. | Replacing the LEDs. detail: I lowered the circuit current as it was the second repair on the same device. On another occasion I noticed the same defect. I removed the power supply resistors r817 and r820 (both 1r). the measurements go from 67.2v and 101ma to 65.1v and 58ma. I tried to remove the r817 and r816 (1r and 8r2), but the current only dropped to 67.7v and 79ma. and as it was already the 2nd time... I didn't want to risk it. | Eletrônica R-Tec |
| LG |
42PQ30R
|
Normal league dark screen | Open resistor 2.2r 3wat r503 near yellow transformer | Replace r503 and resolder all points suspected of locks with excessive heating | ASL ASSISTENCIA TÉCNICA TONINHO |