Panasonic Repair Tips

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Make	Model	Symptom	Problem
PANASONIC	EURO 1	Brightness increases until a white raster is present	Dpu2553 deflection proc chip
PANASONIC	EURO 1	Black lines appear in txt & osd boxes when heated	Ic1501 dpu2553 deflection proc chip
PANASONIC	CN677R	Tune store inop	D1129 o/c
PANASONIC	CN677R	Blows lop transistor	Bu2508d subst for the 2sd1175 fitted seems to have cured it
PANASONIC	CN677R	Blows lop tr at sw on	Line dr tfmr faulty - could be dry joints on it
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
PANASONIC	ANUBIS B	Stuck in demo mode	Sw on mains whilst depressing "vol" & "prog+" on set
PANASONIC	ALPHA3 TX25A2X	No teletext	C3517 100nf 50v leaky (ecqv1h104j2)
PANASONIC	ALPHA2 TX25T2	Dead	Loptr q551 s/c, c808 10uf 50v
PANASONIC	ALPHA2 TX25T2	Black lines across screen	R469 470r o/c
PANASONIC	ALPHA2 TX24T1	Loss of sync, no sound	Ic3501 saa5231 faulty (video processor on h board)
PANASONIC	ALPHA2 TX21V1	Int. low or no sound from right speaker, also crackling	C2441 100pf leaky
PANASONIC	ALPHA2 TX21T1	Dead	Ic801 str51424m
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
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
PANASONIC	ALPHA 4 TX25X1	No picture - sound ok	Tda3654 fop i.c. and 800ma fuse next to it
PANASONIC	ALPHA 4	Won't power up - works if pins 3 & 4 of opto shorted	Q890 2sc3311-r leaky
PANASONIC	ALPHA 4	Shuts down at sw on with a splutter - ht only 60v	Loptx
PANASONIC	ALPHA 4	Osd consist of black boxes only - pic & txt ok	C3304 0µ01 leaky & r3309 820r hi res
PANASONIC	ALPHA 4	No picture - sound ok	R539 10Ω fuse resistor in supply to line driver transistor o/c.