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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

MakeModelProblemSolutionDate
Found: 711
SharpC1891Int brightness variationsHi value resistors in A1 supply14-09-04
SharpC1891No colour.I801 ( RH-1X0109 ) , Q407.14-09-04

SharpC2002Dead.STR4090.14-09-04
SharpC2002Standby - no switch on some times from s/by.R717 ( 390k ) , C720 , R712 , last IC701.14-09-04
SharpC2015PVertical line in the middle of screen. Vertical IC defective. Type: X0238CE Replace with a common uPC 1378. (Fully compatible)14-09-04
SharpC2051Tuning driftQ104 2SC458A on sensor panel14-09-04
SharpC2072Lack of heightSet running perm off start up supply - R237 15k o/c or dry joint Q20914-09-04
SharpC2072No sound - o/p stages workingR319 270R o/c14-09-04
SharpC2092Int blank white screen & dist soundIC401 IX0118CE which contains clamping cct14-09-04
SharpC2092No tuning memory & only half a tuning barCheck pin 7 I1005 - should be 0v in search, if high check I1010 IX0135CE & R1072 33k14-09-04
SharpC2092Raster - white - sound deterioration.IC401 ( IX0118CE )14-09-04
SharpC2095No tuning memory.R1072 ( 33k , 0.5W ) o/c.14-09-04
SharpC2095Tuning restricted - tuning volts rises to 8v onlyIC11012 TC4081 OSD chip faulty - tuning ok when this chip removed but with no OSD - chip replaced14-09-04
SharpC3702HWeak drive either RGBCheck D807 D808 D809 & TDA356614-09-04
SharpC3703HDead fuse intact no output PSUSTR40090 u/s14-09-04
SharpC3703Hdist sound & int on chan change - no vol controlT301 sound discrim coil faulty - set up with can fitted14-09-04
SharpC3703H 7PSDead - no o/p from psuSTR40090 psu chopper chip14-09-04
SharpC3705HDNo pic - interrference only - sound okLike white tadpoles - IF module RUNTK0065CEN114-09-04
SharpC3705HDNo signals or tuning volts at tunerCrack in print between R1016 & R209 on edge of pcb14-09-04
SharpC3705HDSt/by onlyMains relay terminal dry joints - take out of st/by with r/c14-09-04
SharpC3720Int brill level & HeightDry joint reg Q604 near mains sw14-09-04
SharpC3720HCOMES ON THEN GOES STRAIGHT OFF into StByR521 3R9 OC also check D50214-09-04

SharpC3720HNo controls aft 2 hrsMicro IX1559CEZZ14-09-04
SharpC3720HSt/by only - EHT briefly at sw onNo supply to FOP stage - D502 & R521 in 24v supply faulty14-09-04
SharpC3720HStriations on picture & 'black fingers'Lopt o/c pins 6 to 7. Can be replaced with HR7675. Short out Pin 8 to pin 5, then wrap the flying loose wire around the lopt 1 extra turn then fit in pins 11 & 12 reverse them if you get loud whistling !14-09-04
SharpC3720HTuning driftIC1003 - used ZTK3314-09-04
SharpC3720HWeak blue driveD807 on small sub panel connected to crt base leaky (use 1N4148 in lieu) & TDA3566 dec chip14-09-04
SharpC3720H 14AReverts to st/by at sw on122v HT to LOP but no line drive; R521 3R9 fusible res in FOP 24v supply o/c - check D50214-09-04
SharpC3720H 14ASt/by only after brief green LEDR521 3R9 in 24v supply o/c - next to LOPTx14-09-04
SharpCA1Replacing TDA884x/N1 with N2TDA884x versions 1Y and 2Y are not interchangeable. Version 1Y is now obsolete. So if you use 2Y instead of 1Y make the following changes: 1. remove L205 (IF-VCO coil pin 13-14) 2. change R407 from 68R to 47R (SCART video out) 3. change R802 from 220R to 150R (Video in) 4. change R204 from 1M to 4.7M (pin 15 - Vcc) 5. write to EEPROM address 0C value 4014-09-04
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