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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: 308
Aiwa
VX
G1
42
No raster - OSD OK
Q1029 near tuner
14-09-04
Aiwa
VX
G1
42K
Dead - no st/by
R516 270K, IC501 TDA4605-3, Q500 2SK2397-01MR
14-09-04
Aiwa
VX
G1
42K
Dead - no stby
R516 270k, IC501 TDA4605-3, Q500 2SK2397
14-09-04
Aiwa
VX
G1
42K
Dead with st/by led lit - accepts a tape but no functs
ICP506 1A CP on tv pcb o/c
14-09-04
Aiwa
VX
G1
42K
Dead with fast tripping aft power cut
C513/C538 1m 160v in psu hi esr
14-09-04
Aiwa
VX
G1
42K
No pic or vcr mechs - osd & sound ok
Replacing the faulty switching transistor Q511 [2SB926] which supplies the chroma +9V cured both faults. It is situated at the back LHS of the VCR board.
14-09-04
Aiwa
VX
G1
42K
No sigs
Q1029 (2SC926) at rear of vcr pcb s/c - used a BD234
14-09-04
Bush
2160NTX
G1
000
Bright raster with sound
No HT to RGBs - R315 10R pin 9 LOPTx o/c
14-09-04
Grundig
G1
00
Bright white raster - sound ok
R315 100R 1/4w fusible o/c
14-09-04
Grundig
G1
000
bright raster sound ok
R316 10R in HT o/c Also replaced rect & smoother to be safe
14-09-04
Grundig
G1
000
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
G1
000
Dead - lop tr s/c & high HT (200v)
D105 BAS16 sm leaky
14-09-04
Grundig
G1
000
Dead - no 9v supply
R116 fusible o/c IC102 5v reg overheats - C543 sm cap under µ s/c
14-09-04
Grundig
G1
000
Dead - slowly ticking
C104 Mains smoother o/c
14-09-04
Grundig
G1
000
Dead - tripping
D304 BY133 in LOP s/c
14-09-04
Grundig
G1
000
Dead & ticking
D301 BA157 26v supply s/c
14-09-04
Grundig
G1
000
Field collapse
R337 100R
14-09-04
Grundig
G1
000
Instability using SCART i/p
Micro chip faulty
14-09-04
Grundig
G1
000
Int PSU failure, grey scale variations etc
check C104 47mfd 400v - if Black Siemens type replace it
14-09-04
Grundig
G1
000
No lum in txt
sm TR653 BC847 leaky b-e
14-09-04
Grundig
G1
000
No sound
R550 4R7 (9v feed to audio chip) TDA2822M IC550 o/c
14-09-04
Grundig
G1
000
Peak white pic with fb lines
R999 100R on crt base
14-09-04
Grundig
G1
000
pink raster with striations sound/rc ok
changed 6 trs on crt base + 3 15k resistors cured it
14-09-04
Grundig
G1
000
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
G1
000
St/by only
D304 BY133 s/c ; R314 6k8 4w o/c
14-09-04
Grundig
G1
000
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
G1
000
Unfocused 6 inch wide band down screen only
Line freq twice operating freq - cannot be adj - IC500 micro faulty
14-09-04
Grundig
G1
000
Blank raster and narrow
R315 10R o/c - supply to RGB stage also dry joints power trs
14-09-04
Grundig
G1
000
St/by only
No line drive - R314 6k8 2w o/c
14-09-04
Grundig
G1
000
Tripping with burning smell
LOPtx
14-09-04
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