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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: 8
Sharp
C3720H
COMES ON THEN GOES STRAIGHT OFF into StBy
R521 3R9 OC also check D502
14-09-04
Sharp
C3720H
No controls aft 2 hrs
Micro IX1559CEZZ
14-09-04
Sharp
C3720H
St/by only - EHT briefly at sw on
No supply to FOP stage - D502 & R521 in 24v supply faulty
14-09-04
Sharp
C3720H
Striations on picture & 'black fingers'
Lopt o/c pins 6 to 7. Can be replaced with HR7675. Short out Pin 8 to pin 5, then wrap the flying loose wire around the lopt 1 extra turn then fit in pins 11 & 12 reverse them if you get loud whistling !
14-09-04
Sharp
C3720H
Tuning drift
IC1003 - used ZTK33
14-09-04
Sharp
C3720H
Weak blue drive
D807 on small sub panel connected to crt base leaky (use 1N4148 in lieu) & TDA3566 dec chip
14-09-04
Sharp
C3720H
14A
Reverts to st/by at sw on
122v HT to LOP but no line drive; R521 3R9 fusible res in FOP 24v supply o/c - check D502
14-09-04
Sharp
C3720H
14A
St/by only after brief green LED
R521 3R9 in 24v supply o/c - next to LOPTx
14-09-04
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