panasonic Repair Tips

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Make	Model Ch.	Symptom	Problem Solution
Panasonic	Z3 Chassis	No start up	Works ok when pin15 (X ray prot) IC101 is grounded; R560 270k near plug E7 o/c
Panasonic	Z3 Chassis	No color	C616 10nF 50v leaky - pin 29 IC101
Panasonic	Z3 Chassis	Int pic	Hairline cracks around line dr trfmr T531
Panasonic	Z3 Chassis	Int dead	IC1101 reset line slightly low ; C1122 0µ01 leaky
Panasonic	Z3 Chassis	Field scan cramped at bottom at sw on	IC451 TDA3653C FOP chip
Panasonic	Z3 Chassis	Field lin - top stretched & bottom compressed	C458 4µ7 or 10µ 50v
Panasonic	Z3 Chassis	Field - reduced height with poor lin	C404 4µ7 50v
Panasonic	Z3 Chassis	Failure to start	R802 330k o/c - bias provider for chopper chip
Panasonic	Z3 Chassis	Failed to start - int, with no R/C operation	5v supply from small trfmr at TPE2 = 4.4v; D1124 5v1 zener leaky
Panasonic	Z3 Chassis	Dead - no volts from psu	Remove Q806 st/by tr & wind up mains via variac; all worked ok & Q806 2SA683 was faulty
Panasonic	Z3 Chassis	Dead	R801 4R7 5w o/c, IC801 STR50103A-M s/c, D816 HT SR2KN prot diode s/c, Q806 St/by sw tr 2SA683 s/c,, R559 10R 7w o/c, Q551 2SD1439 LOP Tr leaky
Panasonic	Z3 Chassis	Cuts out on bright scenes	R316 47k in beam lim cct o/c
Panasonic	Z3 Chassis	Colour at max & won't reduce - OSD does alter	IC1101 micro pin 31 doesn't vary when col adj. Control carried out in IC101 pin 21 on if/dec panel; when this pin grounded a mono pic observed; D1149 MA165 diode leaky
Panasonic	Z3	XRAY PROT WORKING	CHECK R560 270k
Panasonic	Z3	Tuning drifting - worse from cold.	C17 ( 10nf ) leaky.
Panasonic	Z3	Trips off aft 2 secs	R560 270k in trip cct (185v supply to RGB monitor)
Panasonic	Z3	TRIPS OFF	R560 270k R552 27k
Panasonic	Z3	STUCK IN STBY IC1104 5v RAIL LOW AT 4v	Q804 OR ZENER DIODE D810
Panasonic	Z3	Set buzzes from PSU but dead	If pin 15 IC101 high ( X-ray protection ) try shorting to chassis , if set ok check Q502 and R560 270k
Panasonic	Z3	Reduced height poor linearity	C404 ( 4u7 ) 50V