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Electronic appliance repair tips database - TV (LCD,TFT,Plasma,Digital), Monitor, VCR, DVD recorder and player, Digital camera, Audio equipment, Microwave ovens, Phone systems, Computer repair
Make
Model
Problem
Solution
Date
Found: 13
Pioneer
SV
2102
EHT NO PIC OR SOUND
U4606 ( DO NOT USE PIONEER PART No !!! )
14-09-04
Pioneer
SV
2102
No sound/vis - EHT present
IC U4606
14-09-04
Pioneer
SV
2801
No contrast - RGBs high at 165v
U4606 vid proc chip faulty - U4647 does
14-09-04
Pioneer
SV
2801
Sound int
Check spkr pl/skts & AM/FM sound module earthing for dries & QS46 17.7292MHz Xtal
14-09-04
Pioneer
SV
2803
BOTTOM FOLDOVER
680mfd , 35v FIELD SCAN COUPLING CAP
14-09-04
Pioneer
SV
2803
Field foldover at bottom
C2582 680µ 35v
14-09-04
Sharp
SV
2142ED
Hi HT at 250v (115v)
Crack in print by pins 1 & 4 of STRD5441
14-09-04
Sharp
SV
2588H
Dead aft brief activity at sw on
Overiding relay gave blank raster/no sound - D712 & D713 dry joints
14-09-04
Sharp
SV
2589
For PSU problems.
Resolder diodes attached to PSU heatsink.
14-09-04
Sharp
SV
2589
INT RED TINT IN TOP 2/3rds OF PICTURE
C636 DRY CHECK DIODES ON HEATSINK ALSO
14-09-04
Sharp
SV
2589
Red tint at top of pic & slight vert jitter
C636 330µ dy joints
14-09-04
Sharp
SV
287XH
Blank raster/no sound - OSD present (RF & Scart)
Switching [video and audio] is performed by IC401 [M51321P] a three gang three way device. pin 15 of the IC works on a tristate level. With the IC supply being 12V: 0 - 2.5V Input from BNC; 5 - 7V Input from scart ;9 - 12V Input from tuner. Diode D419 [DX00458M] which links to the wiper of the AGC preset was leaky, limiting the voltage on pin 15 to 7V and thus preventing tuner mode selection. Replace D419 with an IN4148
14-09-04
Sharp
SV
287XH
St/by only at sw on with burning smell
R518 2R2 smokes due to fop chip IC501 LA7831 faulty - caused by C521 & 522 100µ 35v o/c
14-09-04
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Last SM download : Philips TX400U-04
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