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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: 48
Bush
2857
off
C914 4n7 across HT rect leaky
14-09-04
Bush
2857
Poor V & H sync
C127 in screened can housing IC102 TDA3805
14-09-04
Bush
2857
NTX
Blank raster
No 12v supply to tuner - R327 2R2 o/c
14-09-04
Bush
2857
NTX
Blank raster - sound ok
R436 6R8 hi res
14-09-04
Bush
2857
NTX
Blank raster - sound ok
12v to IC397 & 304 low - R435 0R68 1w o/c
14-09-04
Bush
2857
NTX
Blank screen & no controls
5v supply drops to 3.4v out of st/by - IC103 faulty
14-09-04
Bush
2857
NTX
C926 blown/smoking - HT unstable
C908 & C910
14-09-04
Bush
2857
NTX
Dead
o/c 0.68 ohm 1 Watt resistor on the secondary of the chopper transformer.
14-09-04
Bush
2857
NTX
Dead - off with bang/smoke
C925 1000µ 25v, C926 22µ 160v, R916 0R68 1w safety res, C910 47µ 25v & other unreliable caps as in Onwa
14-09-04
Bush
2857
NTX
Dead apart from Screaming PSU
145v HT safety res smoking & hi res; 16v rail safety res o/c (Both inc yellow sleeving) - main cause C926 22µ 160v s/c - usual cause of 16v rail demise = Onwa psu caps
14-09-04
Bush
2857
NTX
Field bounce - esp when cold
C127 3µ3 off pin 10 IC102
14-09-04
Bush
2857
NTX
Flat looking pic
R433 150k in beam lim
14-09-04
Bush
2857
NTX
Frame bounce
Adj AGC
14-09-04
Bush
2857
NTX
HT high and uncontrollable
chopper base control tr leaky
14-09-04
Bush
2857
NTX
Left hand side darker than right
C424 10µ 160v in RGB o/p supply
14-09-04
Bush
2857
NTX
Low contrast & col
R433 150k near LOPTx o/c
14-09-04
Bush
2857
NTX
Nicam popping
X001 13.104Mhz Xtal faulty
14-09-04
Bush
2857
NTX
No pic - just grey raster, sound & OSG OK
R435 0R68 12v reg feed res gone hi res
14-09-04
Bush
2857
NTX
No sound
IC101 TDA3857 sound IF
14-09-04
Bush
2857
NTX
No sound then shut down after short while
IC601 pin 29 low ident signal of 4v - should be 8v - C136 0µ02 leaky
14-09-04
Bush
2857
NTX
Poor pic - lacks crispness
R433 150k in beam lim hi res
14-09-04
Bush
2857
NTX
Poor reg - width varies with brill
C905 220µ 400v mains smoother
14-09-04
Bush
2857
NTX
Small pulsating raster
C924 22mfd 250v HT smoothing cap o/c
14-09-04
Bush
2857
NTX
St/by only
R125 2R2 12v feed to line osc o/c
14-09-04
Bush
2857
NTX
Sync crushing from cold
11.5v supply slightly low - R436 6R8 2w hi res
14-09-04
Bush
2857
NTX
Sync poor & cogging from cold
3.3mfd 50v in IF can
14-09-04
Bush
2857
NTX
Sync poor when cold
C127 3µ3 50v in IF can
14-09-04
Bush
2857
NTX
Vert green line down lh side
D408 S529G
14-09-04
Bush
2857
NTX
Weak contrast
R433 150k o/c
14-09-04
Bush
2857
NTX
Width, height & sound varies wildly
C926 22µ 160v high esr
14-09-04
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