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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: 711
Sharp
C1891
Int brightness variations
Hi value resistors in A1 supply
14-09-04
Sharp
C1891
No colour.
I801 ( RH-1X0109 ) , Q407.
14-09-04
Sharp
C2002
Dead.
STR4090.
14-09-04
Sharp
C2002
Standby - no switch on some times from s/by.
R717 ( 390k ) , C720 , R712 , last IC701.
14-09-04
Sharp
C2015P
Vertical line in the middle of screen. Vertical IC defective. Type: X0238CE
Replace with a common uPC 1378. (Fully compatible)
14-09-04
Sharp
C2051
Tuning drift
Q104 2SC458A on sensor panel
14-09-04
Sharp
C2072
Lack of height
Set running perm off start up supply - R237 15k o/c or dry joint Q209
14-09-04
Sharp
C2072
No sound - o/p stages working
R319 270R o/c
14-09-04
Sharp
C2092
Int blank white screen & dist sound
IC401 IX0118CE which contains clamping cct
14-09-04
Sharp
C2092
No tuning memory & only half a tuning bar
Check pin 7 I1005 - should be 0v in search, if high check I1010 IX0135CE & R1072 33k
14-09-04
Sharp
C2092
Raster - white - sound deterioration.
IC401 ( IX0118CE )
14-09-04
Sharp
C2095
No tuning memory.
R1072 ( 33k , 0.5W ) o/c.
14-09-04
Sharp
C2095
Tuning restricted - tuning volts rises to 8v only
IC11012 TC4081 OSD chip faulty - tuning ok when this chip removed but with no OSD - chip replaced
14-09-04
Sharp
C3702H
Weak drive either RGB
Check D807 D808 D809 & TDA3566
14-09-04
Sharp
C3703H
Dead fuse intact no output PSU
STR40090 u/s
14-09-04
Sharp
C3703H
dist sound & int on chan change - no vol control
T301 sound discrim coil faulty - set up with can fitted
14-09-04
Sharp
C3703H 7PS
Dead - no o/p from psu
STR40090 psu chopper chip
14-09-04
Sharp
C3705HD
No pic - interrference only - sound ok
Like white tadpoles - IF module RUNTK0065CEN1
14-09-04
Sharp
C3705HD
No signals or tuning volts at tuner
Crack in print between R1016 & R209 on edge of pcb
14-09-04
Sharp
C3705HD
St/by only
Mains relay terminal dry joints - take out of st/by with r/c
14-09-04
Sharp
C3720
Int brill level & Height
Dry joint reg Q604 near mains sw
14-09-04
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
Sharp
CA1
Replacing TDA884x/N1 with N2
TDA884x versions 1Y and 2Y are not interchangeable. Version 1Y is now obsolete. So if you use 2Y instead of 1Y make the following changes: 1. remove L205 (IF-VCO coil pin 13-14) 2. change R407 from 68R to 47R (SCART video out) 3. change R802 from 220R to 150R (Video in) 4. change R204 from 1M to 4.7M (pin 15 - Vcc) 5. write to EEPROM address 0C value 40
14-09-04
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