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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: 32
B & O
550
0
Snowy pic, no sound & erratic col
IC6 TDA8120 in IF
14-09-04
B & O
LX
550
0 3903
St/by only after initially being hard to turn on
C20 & 25 47µ 50v
14-09-04
Bush
2
550
NTX
Cuts out aft several hrs with HT rail pulsing
R816 47R sm feedback to chopper chip int o/c
14-09-04
Bush
2
550
NTX
Preventative maintenance
Check scan coil plug for dry joints - if burn up occurs could be write off
14-09-04
Grundig
GRT
550
Dead.
T661 ( S668T ) faulty.
14-09-04
Grundig
TVR
550
4
Int dead
Dry joints around LOPTx though looked ok
14-09-04
Grundig
TVR
550
4
INT TEXT FLASHES GARBLED TEXT ON TO PICTURE AND PI
DRY JOINTS ON EARTHS ON TEXT PCB
14-09-04
Mitsubishi
HS
550
V(B)
ROW OF DOTS ON SCREEN
REPLACE CHARACTER GENERATOR IC501
14-09-04
Philips
21CE7
550
Dead - HT only 35v (135v)
LOPTx
14-09-04
Philips
21GR2
550
F7 in display/ LED flashing - no user controls
5v supply to Txt pcb low - C2843 22µ 16v
14-09-04
Philips
2
550
DEAD-LOUD TRIPPING NOISE
D6845 ( SURFACE MOUNT ) SHORT
14-09-04
Philips
2
550
NO FIELD SCAN ( APPROX 2" )
R3511 HIGH
14-09-04
Philips
25MN1
550
No tuning - in Hotel mode
select CH 38 simultaneously press vol + and ch - to disable hotel mode
14-09-04
Philips
G90AE 21GR2
550
Tripping PSU
Check/replace 3 x 33v sm zeners in series
14-09-04
Philips
GR2.2 25MN1
550
No line or field sync
IC7470 TDA2579B tbase gen chip u/s - caused by arcing LOPTx
14-09-04
Philips
GR2.2AA 25MN1
550
LOPTr destroyed every few days/weeks
Varyation in hor phasing - TDA2579B timebase gen chip
14-09-04
Saba
IKC2 M
550
6
No signals
Replace II06 SDA 3202 in tuner
14-09-04
Schneider
STV
550
1 11AK19
Bright screen with fb lines
Check D609 BA159 & its series connected resistor
14-09-04
Toshiba
2
550
TB
frame collapse, no sound
R480 (24545229) o/c, IC480 MC7809BT (23904844)
14-09-04
Toshiba
2
550
TB
PARTIAL FRAME COLLAPSE AND NO SOUND
REPLACE R480 AND IC480
14-09-04
Toshiba
2
550
TB
patterning on top and bottom from cold, freezing QD03 on DPC board shows the fault
design problem causing line pick-up from video stage, add 0.01uF 50V cap on print side of DPC across RD13
14-09-04
Toshiba
2
550
TB
Pic jumps & arcing noise with G2 fashing on crt base
Check earth pin of LOPTx
14-09-04
Toshiba
2
550
TB
Width lacking with E/W corr faulty
QD01 2SB688 leaky - or was it a dodgey heatsink? Insulate from heatsink
14-09-04
Wharfedale
550
Dead - no line drive
replace Q580 (C1573A) and R609 1K 4W
14-09-04
Wharfedale
550
Field shifted down after burnt LOPTx replaced
Replace RD06 10k & RD17 4K7 (burnt) & adj in serv mode (in vault)
14-09-04
Wharfedale
550
Off with burning smell
C599 2n2 high volts disc ceramic cap in LOP burnt
14-09-04
Wharfedale
550
Pic absent - sound ok
R609 1k 5w o/c & Q580 2SC1537 line dr tr leaky
14-09-04
Wharfedale
550
St/by only - no line drive
Q580 (2SC1573A line driver) equiv 2SC3468 (Seme) - also replace LOPTr BU508AF
14-09-04
Wharfedale
550
Width lacking & no E-W
RD18 ( 5K6 1w safety) o/c which was caused by CD21 ( 470 or 680nF 250v ) being O/C to print
14-09-04
Wharfedale
550
FTB
SCART I/p has no sync - sound ok
TDA8361A replaced & resolder scart
14-09-04
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