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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: 19
Harwood
HTV
942
5RTN
Jumps when cold & int blank raster
R436 3R9 2w dry joints & hi res (near scart)
14-09-04
Harwood
HTV
942
5RTN
Off with a bang
C926 22µ 250v had exploded & C910 47µ 25v, C908 10µ 50v in pri psu
14-09-04
Harwood
HTV
942
5RTN
Sync poor when cold
C127 3µ3 50v in IF can
14-09-04
Philips
21PT3
942
mono-carrier PCB-layout of L9.1A
For the above mentioned 21" sets the mono-carrier PCB-layout of L9.1A is introduced to increase the audio power and the way the SDM and the SAM is entered is changed. They also have a new Side AV & headphone panel (E1). The 21PT3952 and 21PT3962 are t
14-09-04
Sony
AE-1C KVX2
942
U
OSD wobbles int from side to side, set switches off
resolder 12V regulator under plastic chassis
14-09-04
Sony
AE-1C KVX2
942
U
very weak sound (as if in mute)
D271 13v zener (8-719-921-88) o/c in the PSU
14-09-04
Sony
AE-2B KVA2
942
U
dead, no 300V supply
R614 18k 3W o/c on LOPTx pin 8 (121648811)
14-09-04
Sony
AE-2B KVA2
942
U
sound cuts out after 20-30 min, pic Ok
R626 27R 0.25W safety gone high
14-09-04
Sony
AE-2F KV2
942
U
no power
C609 22uF 25V
14-09-04
Sony
AE2A KVE2
942
U
Dead
LOPTr 2SC4927 s/c replaced gave 13 flashes of LED. FOP chip TDA8179S cured that then excess width - Q806 2SK1916 leaky
14-09-04
Sony
AE2B KVA2
942
U
Int sound
Check R627 22R fusible on K1 panel for high res
14-09-04
Sony
AE2B KVA2
942
U
Int won't come out of st/by
Plug in board K1 was the cause - reqd 2 x TDA2052 Ics
14-09-04
Sony
AE2F KVS2
942
U
Int pic, low HT of 80v
Check R641 & R642 1M, C609 22uF on PSU R848 220K main board
14-09-04
Sony
KVA2
942
S
FOR VERTICAL SHIFT AND HEIGHT PROBLEMS
ENTER SERVICE MODE AND MAKE SURE "GEOMETRY SET" IS OFF
14-09-04
Sony
KVA2
942
U
Vol intermittent
R627 27R hi res
14-09-04
SONY
KVX2
942
INT NO SOUND FROM SURROUND SPEAKERS
REPLACE R627 IN POWER SUPPLY 270 OHM
14-09-04
Sony
KVX2
942
INT NO SOUND FROM SURROUND SPEAKERS
REPLACE R627 IN POWER SUPPLY
14-09-04
Sony
KVX2
942
U
Dead (mains cap stays charged)
check 3 zeners in series D619/621/609 all 33V (in PSU primary) 2 were o/c
14-09-04
Sony
KVX2
942
U
GRAPHICS WOBBLE FROM SIDE TO SIDE
RESOLDER 12V REGULATOR UNDER PLASTIC CRADLE
14-09-04
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