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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: 31
B & O
4
402
dead
HT only 17v; 5C10 47µ o/c
14-09-04
B & O
4
402
35XX
Dead
Check C10 & C12 ( 47u f )
14-09-04
B & O
4
402
35XX
No sound or picture.
5C10 ( 47u f ) o/c.
14-09-04
B & O
4
402
35XX
Width - line collapse.
Poor connections on scan coils leads.
14-09-04
B & O
4
402
35XX
Width - varieing intermittentley.
Poor connections on scan coils leads.
14-09-04
BPL
BPL9
402
Dead
Q432 BU508DF s/c - check C435 4700pF 2kv for o/c & R552 91k for o/c & drive wfm from IC701
14-09-04
BPL
KLR9
402
-01
St/by only
No line dr supply - R793 4K7 o/c
14-09-04
BPL
LMR9
402
01
Dead - psu faulty
Replace 2SC3807 in base BU508 Power Tr & check green cap here for dry joints
14-09-04
BPL
LMR9
402
01
No sound - IC blown
Q511 2SA933 faulty - replace with 2SA1015
14-09-04
Bush
1
402
Int shuts down
All volts present, no line drive - 500hz resonator pin 19 IC301dry joint
14-09-04
GEC
1
402
No sound at switch on / dist sound
C228 leaky.
14-09-04
GEC
1
402
Whistle - low frequency.
Lin coil L505.
14-09-04
GEC
C1
402
H CVC801
Startup - dead.
IC700 ( 7812 ) 12v reg , T873 , IC870 ( TDA2140 ) check by change
14-09-04
Goodmans
C1
402
Dead
D611-614 mains rects replaced - BY133 does
14-09-04
Goodmans
C1
402
St/by only after s/c mains diode replaced
IC612 opto isolator - type unmarked - most 4 legged devices should work
14-09-04
Grundig
3
402
Switching on problems - Hum.
Relay contacts jammed o/c.
14-09-04
Magnavox
RS2756 C
402
No power to magnavox tv model# RS2756 C402 chassis 28Y100-00AA. No lights, noise, etc. Dead.
Is the main fuse blown? If yes, there's a problem in the primairy side of the power supply. If no, check the following: 1) Do you have 300/160V over the main capacitor. 2) Is the primairy-power-transitor "working"?
06-07-05
Matsui
1
402
field trying to collapse with flicker
field preset int
14-09-04
Matsui
1
402
line lock int
C484 2µ2 tant
14-09-04
Matsui
1
402
No tuning
No AGC volts at tuner - R261 47k o/c
14-09-04
Matsui
1
402
NOT TUNING
CHECK IF AGC VOLTAGE PRESENT IF NOT R261 ( 47K ) OPEN
14-09-04
NEI
NWC1
402
R
No green.
Q507 on CRT base o/c.
14-09-04
NEI
NWC1
402
R
Whistle - high pitched.
T431 glue windings.
14-09-04
Onwa
1
402
Snow only - tuning but no store
The -30v supply to IC601 pin 9 low. ZD601 30v zener leaky
14-09-04
Realistic
1
402
160
Tripping - Rapid.
12k R507 & R508 resistors feeding 12v stab o/c.
14-09-04
Toshiba
VTV1
402
Dead
LOPTr insul breaking down (read ok) & C438 & C417 1000pF 500v
14-09-04
Toshiba
VTV1
402
5B
LOPTr keeps failing (Q406 2SD2627LS)
Replacement comes with a kit (pt no BZ510036) - consists of C417 & C438 1000pF 500v replacements
14-09-04
Toshiba
VTV1
402
B
Dead
R504 270k o/c
14-09-04
Toshiba
VTV1
402
B & S
Dead
Q406 2SD2627LS LOPTr pt no BZ10036 s/c - also replace C417 & C438 1000pF 500v
14-09-04
Triumph
CTV8
402
Herringbone patterning - sound Ok.
C807 ( 120u f ) in PSU.
14-09-04
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