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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: 534
Grundig
CUC95
Field collapse
all 3 field pre-set pots had been twiddled & broken - replacement cure
14-09-04
Grundig
CUC95
No pic, heaters or EHT - no line pulses from TDA1950
EHT cap had been arcing and caused demise of TB chip TDA1950 & TDA1770 field chip
14-09-04
Grundig
G100
Bright white raster - sound ok
R315 100R 1/4w fusible o/c
14-09-04
Grundig
G1000
bright raster sound ok
R316 10R in HT o/c Also replaced rect & smoother to be safe
14-09-04
Grundig
G1000
Dead - IC500 ST6365 micro not being reset
No reset pulse pin 33 due to either Tr540 BC847 or Tr451 BCX19 sm trs going s/c - replace both
14-09-04
Grundig
G1000
Dead - lop tr s/c & high HT (200v)
D105 BAS16 sm leaky
14-09-04
Grundig
G1000
Dead - no 9v supply
R116 fusible o/c IC102 5v reg overheats - C543 sm cap under µ s/c
14-09-04
Grundig
G1000
Dead - slowly ticking
C104 Mains smoother o/c
14-09-04
Grundig
G1000
Dead - tripping
D304 BY133 in LOP s/c
14-09-04
Grundig
G1000
Dead & ticking
D301 BA157 26v supply s/c
14-09-04
Grundig
G1000
Field collapse
R337 100R
14-09-04
Grundig
G1000
Instability using SCART i/p
Micro chip faulty
14-09-04
Grundig
G1000
Int PSU failure, grey scale variations etc
check C104 47mfd 400v - if Black Siemens type replace it
14-09-04
Grundig
G1000
No lum in txt
sm TR653 BC847 leaky b-e
14-09-04
Grundig
G1000
No sound
R550 4R7 (9v feed to audio chip) TDA2822M IC550 o/c
14-09-04
Grundig
G1000
Peak white pic with fb lines
R999 100R on crt base
14-09-04
Grundig
G1000
pink raster with striations sound/rc ok
changed 6 trs on crt base + 3 15k resistors cured it
14-09-04
Grundig
G1000
Reduced width with foldover
Check line freq is not twice normal - if so micro IC500 75990-200-63 faulty - mod available
14-09-04
Grundig
G1000
St/by only
D304 BY133 s/c ; R314 6k8 4w o/c
14-09-04
Grundig
G1000
To enter service mode
Press "P+" & "P-" together at sw on. To choose a funct select menu on r/c. Adj with "P+" & "P-" buttons. Choosing another funct stores setting
14-09-04
Grundig
G1000
Unfocused 6 inch wide band down screen only
Line freq twice operating freq - cannot be adj - IC500 micro faulty
14-09-04
Grundig
G1000
Blank raster and narrow
R315 10R o/c - supply to RGB stage also dry joints power trs
14-09-04
Grundig
G1000
St/by only
No line drive - R314 6k8 2w o/c
14-09-04
Grundig
G1000
Tripping with burning smell
LOPtx
14-09-04
Grundig
G1000 GT2103
Bright raster with fb lines
R315 10R near LOPTx o/c - supplies volts to RGB
14-09-04
Grundig
GCS100
Dead - blowing fusible resistor.
Insulating pad under TY501 leaky.
14-09-04
Grundig
GRT550
Dead.
T661 ( S668T ) faulty.
14-09-04
Grundig
GSC100
Dead - blowing 3.15 fuse - intermittently.
EHT cap arcing.
14-09-04
Grundig
GSC100
Dead - blowing 3.15amp fuse.
EHT cap jumping across to degaussing coil.
14-09-04
Grundig
GSC100
Dead.
R607 o/c , faulty thyristors , insulation in line o/p stage.
14-09-04
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