| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Panasonic | Alpha 1 | Tripping | D854 SR2KN avalanche diode s/c due to C808 10µ 50v low cap (could also be STR54041M chopper chip) it is advisable to change both | ||
| Panasonic | Alpha 1 | TDA4505M-N3 replacement by TDA4505E | Change R113 from 22k to 470k; R112 1M5 to 470k & re-align AFC as nec | ||
| Panasonic | Alpha 1 | Squealing. | Line drive transformer. | ||
| Panasonic | Alpha 1 | Screams | Ht=20v lop tr 2SD1439 leaky CP567 1A cct prot o/c | ||
| Panasonic | Alpha 1 | Replacing TDA4505M-N3 with TDA4505E | Change R113 from 22k to 470k; R112 from 1M5 to 470k; align AFC for optimum pic | ||
| Panasonic | Alpha 1 | Replacement of TDA4505M-N3 | You can use cheaper TDA4505E if R113 changed from 22k to 270k, R112 from 1M2 to 470k & re-align afc coil | ||
| Panasonic | Alpha 1 | Remote commands int ignored | Dry joint X3505 Xtal on Txt pcb | ||
| Panasonic | Alpha 1 | Reduced top frame after a few minutes. | Scan Coils! | ||
| Panasonic | Alpha 1 | Raster - blanking out. | IC801. | ||
| Panasonic | Alpha 1 | Q551 KEEPS BLOWING | CHECK DRY-JOINTS ON LINE OUTPUT TRANSFORMER | ||
| Panasonic | Alpha 1 | Plain blank raster & no sound , no OSD sync - Ok via rear sockets. | Replace IC101 ( TDA4505M ) in side can middle of chassis. | ||
| Panasonic | Alpha 1 | Pic goes in from RH side with black line across centre | Dry joints field o/p chip | ||
| Panasonic | Alpha 1 | Pic brightens & drops with dist field scan when heated | Scan coils faulty - reqs replacement of crt as they are bonded | ||
| Panasonic | Alpha 1 | off - safety res R851 2R2 o/c when replaced loud buzz | when base of line driver tr lifted buzzing stops. No line drive replaced TDA4505M-N3 jungle chip (must be correct suffix) | ||
| Panasonic | Alpha 1 | No sound/pic off air or via scart | IC2601 M51320P AV sw chip - to check, remove chip & jumper I/P & O/P pins |