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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: 18
Grundig
CUC7350
"E" instead of "OK" shows when storing
Sw on with "Prog -" button depressed to clear "fault"
14-09-04
Grundig
CUC7350
Dead
Chopper FET & control IC partial cure but all volts low until R60027/8 0R56 1w reistors replaced
14-09-04
Grundig
CUC7350
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
CUC7350
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
CUC7350
Dead IRFBC40 chopper MOSFET failure
Dry joints C60029 470pf. Check R60027/28 0R46, R60022 10R, D6011-14 D60023-24 1N4007
14-09-04
Grundig
CUC7350
Int start up
C60031 100µ 35v in psu
14-09-04
Grundig
CUC7350
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
CUC7350
No HT control
HT pot R60027 increased in value from 0R68 to 1R5
14-09-04
Grundig
CUC7350
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
CUC7350
St/by only
LM317T reg s/c by its heatsink clip
14-09-04
Grundig
CUC7350
Tripping
R60027/28 0R46 gone hi res
14-09-04
Grundig
CUC7350
Unstable HT
R60028 0R68 o/c - check it out of cct!
14-09-04
Grundig
CUC7350
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
CUC7350
Dead - +8v supply absent
R61021 15R safety res in 8v reg o/c
14-09-04
Grundig
CUC7350
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
Matsui
21V1N CUC7350
Dead - HT only 25v
Check R60027 0R56 & R60026 0R56 high res or o/c
14-09-04
Matsui
21VIN CUC7350
Field Faulty
EEPROM could be cause
14-09-04
Matsui
21VIN CUC7350
Nicam absent
Channel retune, use auto tune not, direct settings Ch22= BBC1 etc When in auto tune tuning must de-fault to Nicam.
14-09-04
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Last SM download : AKAI CT-14,20,21WKDT
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