Panasonic Repair Tips
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Results: 2911
Results: 2911
| Make | Model | Symptom | Problem | Solution | By |
|---|---|---|---|---|---|
| PANASONIC |
Z4 CHASSIS
|
Slight tuning drift, no sound, no vol osd (other osd ok) | Insufficient sync drive to q1272 base. c524 180pf connected to pin 14 ic521 leaky | ||
| PANASONIC |
Z4 CHASSIS
|
No video with faint unsync lines in background | Sync pulses leaving pin14 ic521 poor - 180pf cap connected to this pin leaky | ||
| PANASONIC |
Z4 CHASSIS
|
No sync | Comes from txt board where ic3507 mab8461-pw216 was faulty (dis pins 2 & 3 to check) | ||
| PANASONIC |
Z4 CHASSIS
|
No sound and half a pic (shifted over) | C503 0µ01 cap across line shift control leaky | ||
| PANASONIC |
Z4 CHASSIS
|
Letter "c" displayed towards left/centre of screen | Reset micro by pressing vol- button on tv whilst pressing timer button on hset - oks then displayed | ||
| PANASONIC |
Z4 CHASSIS
|
Int loss of sound | Check conns to speakers | ||
| PANASONIC |
Z4 CHASSIS
|
Field int collapses or rolls | C402 3µ3 tant cap in field osc stage | ||
| PANASONIC |
Z4 CHASSIS
|
Dead after initial burst of life | Trips even with lop stage dis'd - fault in prot cct - q558 2sa879 faulty tho checked ok out of cct | ||
| PANASONIC |
Z4 CHASSIS
|
Dead - surge lim res r802 4r7 5w o/c | Str54041m ic801 & q801/2 s/c & d854 overvolts prot diode s/c. c809 0µ1feedback cap was the cause (caused excessive ht) also change c808 10µ 63v | ||
| PANASONIC |
Z4 CHASSIS
|
Dead - blank raster when optocoupler overridden | No activity from main micro - ic1202 eeprom st24c02a faulty | ||
| PANASONIC |
Z4 CHASSIS
|
Comes on with field collapse - gradually opens up then int shuts down | C462 470pf ceramic cap leaky in fop cct | ||
| PANASONIC |
Z4 CHASSIS
|
Col int low or absent | C2651 0µ01 sm int o/c | ||
| PANASONIC |
Z4 CHASSIS
|
Bright green at sw on and it cuts out | C350 on crt base | ||
| PANASONIC |
Z4
|
Tuning drift - sound muted. | C524 ( 180pf ) leaky. | ||
| PANASONIC |
Z4
|
Tuning drift no sound no sound osd | Q1272 3 4 or more likely c524 180pf | ||
| PANASONIC |
Z4
|
Tuning drift | Tuner unit | ||
| PANASONIC |
Z4
|
Switches on but dies | Qhd Asqqah | ||
| PANASONIC |
Z4
|
Strange faults. | Reprograme microcomputer see tv mag. | ||
| PANASONIC |
Z4
|
Stores one channel in all locations | Eprom (ic1202)24co2ab1 | ||
| PANASONIC |
Z4
|
Stations tuned to one position already holding tu | Check around text pcb link j10 etc |