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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: 16
Sony BE4A KVM14M1UAt sw on, only 1 funct could be selected b4 lock upReplace IC803 EEPROM 24C02 - used blank14-09-04
Sony BE4A KVM14M1UTo enter service modeSelect OSD ,5,Vol+,TV TT appears in right hand corner. Select menu .Adjust with cursor keys .Standby to store new settings.14-09-04

SonyBE-4A KV21T3Ublank raster with flyback linesA1 voltage too high, replace LOPTx14-09-04
SonyBE-4A KV21T3Uno pic (blank video)D722 (871999133) o/c on CRT14-09-04
SonyBE-4A KV21T3Uvolume goes to max, no remote or front control functionsMicro gets hot, replace Micro part no 87594750614-09-04
SonyBE-4A KVM2171Uframe collapseR622 (HT feed) o/c, R814 0.47R safety (frame feed) o/c14-09-04
SonyBE-4A KVM2171Uno text, excessive width, poor grey scaleNVM corruption. Replace IC002 new type ST24C02FB6 (875937032). Change C0255 from 47uF to 1000uF, add 5.6V zener from pin 8 IC002 (cathode) to earth, tighten earth spring around CRT in the shape of U14-09-04
SonyBE4ADead - 6 blinks from ledOvervolts or current indicated - check HT (118v) - use dummy load; C608 10µ, C620 100µ 160v, STRS5706 poss & loptx14-09-04
SonyBE4ADead - CP602 on sec psu o/cReplacement cures fault only temp - CP602 to N75 (2.5A); Add 5v6 zener between pins 1 & 9 IC803, add 5v6 zener between pins 9 & chassis on print side of pcb14-09-04
SonyBE4ADead - st/by LED flashes 4 times (No lop)No line drive from IC301 MC44007P - chip u/s14-09-04
SonyBE4AField collapse with visible lineSTV9379 fop IC & 24v fusible next to loptx14-09-04
SonyBE4A ChassisFrame collapse. Replaced frame output chip, but picture geometry was not OK. The voltage at pin 8 of MC44007P chip measured low.If picture Geometry after replacing Vertical outp. Chip is not in order, replace also MC44007P. (Replaced also STR-S5706 in case an overvoltage caused the fault)14-09-04
SonyBE4A ChassisFrame collapse. Replaced frame output chip, but picture geometry was not OK. The voltage at pin 8 of MC44007P chip measured low.If picture Geometry after replacing Vertical outp. Chip is not in order, replace also MC44007P. (Replaced also STR-S5706 in case an overvoltage caused the fault)14-09-04
SonyBE4A KV25T1UCorrugations and poor EHT stabilityLOPTx14-09-04
SonyBE4A KVM2171UField collapseR814 0R47 o/c14-09-04
SonyBE4A KVM2171ULuma low, poor sync, field up at bottom & E/W bowingOK when heated - C627 100uF 10V in the 5 volt rail, high ESR, Off pin 8 of IC60314-09-04
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