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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: 1049
Panasonic
Alpha 3
Stuck in standby.
LOPTX
14-09-04
Panasonic
Alpha 3
The Panasonic Alpha 3 Chassis
See TV Mag Mar-Jun 1994
14-09-04
Panasonic
Alpha 3
Txt - no pages but header present or jumping Txt
C3511 220pF ceramic cap on Txt panel leaky
14-09-04
Panasonic
Alpha 3
Txt poor with missing lines & corrupt
C3507 100pF leaky to pin 9 IC3501
14-09-04
Panasonic
Alpha 3 Alpha 3
No sound - dark blank raster.
C1251 ( 10nf ) leaky , main microcontroller & memory chips.
14-09-04
Panasonic
Alpha 3 TX25W2
Txt fault - header unstable & unsync in mix mode
C3511 220pF on board H (connected to pin 24 timing of SAA5231 IC3501)
14-09-04
Panasonic
Alpha 3 TX28A2
Txt lines at top of pic
C454 ( 4.7 uF; C455 ( 100 uF ) and frame output I.C. AN5521
14-09-04
Panasonic
Alpha 3 TX28A2X
E-W bowing
R751 33R o/c
14-09-04
Panasonic
Alpha 4
Blank raster - sound ok - same on scart; on Txtshows "P100" at the top left and "*** TXT ***" flashing at the bottom centre of the screen.
Replace IC3002 (M52472P) on the "H" panel.
14-09-04
Panasonic
Alpha 4
Blank screen - OSD OK
9v supply to IF proc chip IC101 low at pin 41. R170 56R hi res
14-09-04
Panasonic
Alpha 4
Crackle from lh speaker
R2081 10k sm cracked
14-09-04
Panasonic
Alpha 4
Field - height increases when heated with twitching
C402 0µ33 mylar cap leaky in ramp gen cct
14-09-04
Panasonic
Alpha 4
Field cramp & buzz on sound
TDA3654 fop chip
14-09-04
Panasonic
Alpha 4
Inside the Panasonic Alpha 4 Chassis
See TV Mag June - Sept 1995
14-09-04
Panasonic
Alpha 4
int lines across pic
UHF tuner faulty
14-09-04
Panasonic
Alpha 4
No pic - sound ok
R539 10 ohms fuse resistor in supply to line driver transistor O/C.
14-09-04
Panasonic
Alpha 4
OSD consist of black boxes only - pic & Txt ok
C3304 0µ01 leaky & R3309 820R hi res
14-09-04
Panasonic
Alpha 4
Shuts down at sw on with a splutter - HT only 60v
LOPTx
14-09-04
Panasonic
Alpha 4
Won't power up - works if pins 3 & 4 of opto shorted
Q890 2SC3311-R leaky
14-09-04
Panasonic
Alpha 4 TX25X1
No pic - sound ok
TDA3654 FOP I.C. and 800mA fuse next to it
14-09-04
Panasonic
Alpha 4 TX25X1
PSU o/ps die aft brief period at sw on with field coll noticed
VDP3108-A-29 vid/deflect proc chip - NLA. Fit replacement kit with alternative chip
14-09-04
Panasonic
Alpha 4 TX25X1
Stuck in st/by perm
STR56041M PSU chip brought back life to psu but FOP chip & Audio O/P chips both faulty as well as IC1213 micro which, when replaced, gave no sync - IC501 TDA2579B also faulty
14-09-04
Panasonic
Alpha2 TX21T1
dead
IC801 STR51424M
14-09-04
Panasonic
Alpha2 TX21V1
int. low or no sound from right speaker, also crackling
C2441 100pF LEAKY
14-09-04
Panasonic
Alpha2 TX24T1
loss of sync, no sound
IC3501 SAA5231 FAULTY (VIDEO PROCESSOR ON H BOARD)
14-09-04
Panasonic
Alpha2 TX25T2
black lines across screen
R469 470R o/c
14-09-04
Panasonic
Alpha2 TX25T2
dead
LOPTr Q551 S/C, C808 10uF 50v
14-09-04
Panasonic
Alpha3 TX25A2X
no teletext
C3517 100nF 50V LEAKY (ECQV1H104J2)
14-09-04
Panasonic
Anubis B
Stuck in demo mode
Sw on mains whilst depressing "Vol" & "Prog+" on set
14-09-04
Panasonic
CN516
Dead - in prot mode
When prot mode disabled, only scan bottom 1/3rd of screen due to D412 27v zener MA4270H s/c
14-09-04
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