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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: 44
B & O
MX
350
0
Crackling Sound
Dry joints audio o/p chips IC3 & 4 on PCB10 (bottom board)
14-09-04
B&O
MX
350
0
crackling sound
dry joints AF o/p chips IC3 & 4 on PCB10 (bottom)
14-09-04
Bush
TV
350
Negative picture.
Pulse winding o/c ( LOPTX )
14-09-04
Cathay
350
1B
Lack of width & burning smell
Dry joints at line dr tr Q110
14-09-04
Cathay
CTV
350
5
Excessive blue.
C503 leaky on CRT base.
14-09-04
Cathay
CTV
350
5
No line drive.
L404 o/c.
14-09-04
Cathay
CTV
350
5
Red raster with flyback lines .
C509 ( 330pf ) leaky on CRT PCB.
14-09-04
Grundig
350
0 Chassis
No tuning , check pins 13 , 15 of tuner/IF for tunin
If stuck at 30v replace SDA3202 and SDA2516
14-09-04
Grundig
CUC
350
0
DEAD HT LOW AT 80v ( 196v )
D635 SC
14-09-04
Grundig
CUC
350
0
No sound/vis - +C volts low at 80v instead of 196v
D635 BAT86 s/c
14-09-04
Grundig
CUC
350
0
NO SOUND-VISION
CHECK D635 ( BAT86 ) SHORT
14-09-04
Grundig
CUC5
350
No sound at sw on; if vol + on R/C operated sound returns for duration of button press
Aerial socket loose was reputed to be the cause !!! (socket came adrift)
14-09-04
Grundig
CUC5
350
white lines & 2 of each r-g-b- lines on top 3 ins of screen
Check HT & replace C538 47u 35v
14-09-04
Grundig
CUC5
350
CUC5360
"P1" DISPLAYED AFTER PROCESSOR CHANGED
R836 FROM 10K TO 22K ( OLD SDA 20562 A 006 NEW SDA 20562 A 506 Grundig 8305-157-580 )
14-09-04
Grundig
CUC7
350
"E" instead of "OK" shows when storing
Sw on with "Prog -" button depressed to clear "fault"
14-09-04
Grundig
CUC7
350
Dead
Chopper FET & control IC partial cure but all volts low until R60027/8 0R56 1w reistors replaced
14-09-04
Grundig
CUC7
350
Dead - 2.5A fuse blackened
T60020 IRFBC40 chopper tr s/c; D60013 1N4007 mains rect s/c; C60029 dry joints; R60023 1N4003 s/c; R60027 0R56 o/c
14-09-04
Grundig
CUC7
350
Dead - Chopper FET & 2 rect diodes s/c
dry joint on C600 - blew again later due to arcing between FET & heatsink
14-09-04
Grundig
CUC7
350
Dead IRFBC40 chopper MOSFET failure
Dry joints C60029 470pf. Check R60027/28 0R46, R60022 10R, D6011-14 D60023-24 1N4007
14-09-04
Grundig
CUC7
350
Int start up
C60031 100µ 35v in psu
14-09-04
Grundig
CUC7
350
mains fuse o/c, BUZ chopper tr s/c
dry joint C60029 470pf 1.6Kv also check D60011-14 & D60023/4 rects
14-09-04
Grundig
CUC7
350
No HT control
HT pot R60027 increased in value from 0R68 to 1R5
14-09-04
Grundig
CUC7
350
No sound
check sm trs to left of audio IC - mute sound in st/by & when told by micro - BC848C faulty in this case
14-09-04
Grundig
CUC7
350
St/by only
LM317T reg s/c by its heatsink clip
14-09-04
Grundig
CUC7
350
Tripping
R60027/28 0R46 gone hi res
14-09-04
Grundig
CUC7
350
Unstable HT
R60028 0R68 o/c - check it out of cct!
14-09-04
Grundig
CUC7
350
Width varies with pic content - HT varies between 119-129v
R60027 0R56 in curr sensing network - also check R60028 in parallel - values vary with screen size
14-09-04
Grundig
CUC7
350
Dead - +8v supply absent
R61021 15R safety res in 8v reg o/c
14-09-04
Grundig
CUC7
350
Dead - mains fuse shattered
D60013/4 mains rects s/c, chopper FET T60020 IRFBC40 s/c used BUZ90 UC3843 replaced as prec,caused by dry joints chopper tfmr
14-09-04
KENWOOD
KM
350
1T
NO POWER
CHECK RF SUPPRESSOR BETWEEN HV CAP AND MAGNETRON FOR DRY JOINTS
14-09-04
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Last SM download : Allen & Heath PA series
script execution: 0.05 s