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Repair tips

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: 192
AiwaSE211KSt/by onlyR617 high (replace with 390K 1/4W) - located behind LOPTX.This causes the micro-controller to shut the set down and store this condition in the EEPROM. You can either replace the EEPROM with the correct one from Aiwa (which then requires setting up with a special handset), or use an EEPROM programmer to reset the values. There are two values that require resetting: $0139 should be $00 ($2F when faulty) $013C should be $00 ($33 when faulty) 14-09-04
AiwaTVSE211No vid/raster with sound - no/poor OSDIC303 (OSD Sw) pt no Aiwa87A2116701014-09-04

BushWST Professional 4400 seriesService Mode accesshold menu button while turning CTV on until the red LED lights up. Release the menu button and press standby.14-09-04
Decca C SeriesVolume won't Adj over full range or no front Panel Op.For volume - press --/- on remote , Vol + on set , --/- on remote for no front panel , Switch set off , Press & hold P+ on S14-09-04
DeccaA SeriesDeadR802 R803 ( 15K )14-09-04
DeccaA SeriesDead with squealDry joints R808 ww resistor14-09-04
DeccaA SeriesNo remote operationIR Rx faulty14-09-04
DeccaA SeriesVarying HTDry joints R808 ww resistor14-09-04
DeccaB SeriesLine whistle - mod reqdAdd 220pf cap to pin 5 & pin 6 of opto IC802 in psu14-09-04
DeccaB SeriesLoses register 7 (line osc free run)Dry joints 27Mhz Xtal on Txt pcb14-09-04
DeccaB SeriesTo enter electronic screwdriver settingsMove jumper link by proc to other posn. No. in lh of screen is parameter & can be stepped thro' in Hex from 00 to 12 using "3" button (up) & "2" button (down). Parameters changed by using "Balance left & right"14-09-04
DeccaC Serieschildlock onsw on tv whilst holding in 'P+' button on front14-09-04
DeccaC SeriesCuts out on high brightness scenesHT volts drops in sympathy - CE803 220µ 16v ( supply to TDA4605)14-09-04
DeccaC SeriesField collapsedry joint I40214-09-04
DeccaC Seriesint trip - once or twice a dayworse when heated - - TDA4605 heat sensitive - u/s14-09-04
DeccaC SeriesLine down pic when cold (folded scan)R413 18R ?w hi res - check HT correct -115v 14/20"; 109.5v 15/21"14-09-04
DeccaC SeriesNo R/C operationNo o/p from r/c chip IC750 Replace TFMS4360N with TFMS536014-09-04
DeccaC SeriesSt/by LED on - otherwise deadDry joint on end pin SCART skt depriving line feed to dr tfmr14-09-04
DeccaC Seriesst/by onlyHT (B+) present - on/off sw perm made - was faulty14-09-04
DeccaC SeriesStuck on Chan 1 & no analogue control (Child Lock)Hold "Prog +" whilst switching on14-09-04
DeccaD SeriesAll red.R012 100k on CRT base.14-09-04
DeccaD SeriesBright Green RasterGreen cathode volts low - Tr931 BC547 o/c & R932 100k hi res14-09-04

DeccaD Seriesfield collapseR504 3M3 faulty - feeds ramp to pin 42 IC503 TDA836214-09-04
DeccaD SeriesLack of heightCheck 33v supply IC001 TAA550 & feed res R015/6 6k8 & R504 3M314-09-04
DeccaD SeriesLine foldover with crt heaters dimmingR427 line feed res high res14-09-04
DeccaD SeriesNo Field ScanIf IC401 & R414 are OK check R504 3M3 ohm14-09-04
DeccaD SeriesNoisy Power Supply in Stand ByChange C806 to 2.2uF 50V14-09-04
DeccaD SeriesTuning procpress 'filled square' button, press '4', search up with '4', down with '4&3'. Press '5' to store chan, press'6' to exit set up14-09-04
DeccaD SeriesImprovement of AFC Pull in time and Inter-channel MuteChange R001 to 18K & R003 to 27K14-09-04
DeccaDBN9B52P B SeriesBallooning picDry joints line scan coill plug on main pcb14-09-04
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