| Make | Model | Problem | Solution | Date |
| | | |
| Found: 18
|
| Panasonic | TC195 Z3 Chassis | At sw on led blinks once onlythen dead, if powered up with mains sw on led lit perm | D811 opto faulty. To check, s/c pri pins of oto coupler when it should then work ok. On normal operation you have 1,2Volts on the secondary side pins, that drop to 0,6V on standby. | 14-09-04 |
| 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 | 14-09-04 |
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| Panasonic | Z3 Chassis | Cuts out on bright scenes | R316 47k in beam lim cct o/c | 14-09-04 |
| 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 | 14-09-04 |
| 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 | 14-09-04 |
| 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 | 14-09-04 |
| Panasonic | Z3 Chassis | Failure to start | R802 330k o/c - bias provider for chopper chip | 14-09-04 |
| Panasonic | Z3 Chassis | Field - reduced height with poor lin | C404 4µ7 50v | 14-09-04 |
| Panasonic | Z3 Chassis | Field lin - top stretched & bottom compressed | C458 4µ7 or 10µ 50v | 14-09-04 |
| Panasonic | Z3 Chassis | Field scan cramped at bottom at sw on | IC451 TDA3653C FOP chip | 14-09-04 |
| Panasonic | Z3 Chassis | Int dead | IC1101 reset line slightly low ; C1122 0µ01 leaky | 14-09-04 |
| Panasonic | Z3 Chassis | Int pic | Hairline cracks around line dr trfmr T531 | 14-09-04 |
| Panasonic | Z3 Chassis | No color | C616 10nF 50v leaky - pin 29 IC101 | 14-09-04 |
| Panasonic | Z3 Chassis | No start up | Works ok when pin15 (X ray prot) IC101 is grounded; R560 270k near plug E7 o/c | 14-09-04 |
| Panasonic | Z3 Chassis | Reverts to st/by with rush of EHT | HT correct - no line drive; removing prot tr Q451 revealed field collapse caused by D453 MA2270 zener diode - the cause of this fault was traced to flashover in crt | 14-09-04 |
| Panasonic | Z3 Chassis | St/by only | IC1101 micro pin 6 should be high (power on command) but wasn't as chip not being reset. IC1104 resets IC1101 when its supply reaches 5v but didn't reach this level as zener D810 in the 5v reg cct was leaky | 14-09-04 |
| Panasonic | Z3 Chassis | Trips at sw on | Check start up resistors R560 270k & R552 27k for hi res | 14-09-04 |
| Panasonic | Z3 Chassis | Tuning drifts | C17 10nF ceramic cap leaky | 14-09-04 |