Service manuals, schematics, eproms for electrical technicians
PANASONIC TX-28SLB1F
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TV
EPROM
TV
EPROM
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Looking for similar panasonic manual?
Good luck to the repair!
Please do not offer the downloaded file for sell only use it for personal usage!
Looking for similar panasonic manual?
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- Also known:
PANASONIC TX28SLB1F TX 28 SLB 28SLB1F TX-28SLB1F
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Relevant TV forum topics:
This elderly monster arrived with the error “ 4 blinks “ which the manual suggests is a power board fault
There are TWO power boards and a standby power board inside
On removing rear cover there were two swollen 220uf caps on the standby board, sadly replacing them the 4 blinks remained
Swapping the two power boards over[ as they look identical , gives a “ 2 Blink “ error , the limited info in the manual suggesting that the fault is on the lower board [ main 2 ]
Both boards have a PFC voltage of around 380 volts at switch on before the relays click out
I have done cold checks on both boards and there are no obvious differences
As the manual has only a block diagram of the power supply it’s difficult to be sure of values / voltages
Has anybody seen or worked one of these or similar beasts and managed to diagnose the problem
Thanks for looking
Regards Ken
There are TWO power boards and a standby power board inside
On removing rear cover there were two swollen 220uf caps on the standby board, sadly replacing them the 4 blinks remained
Swapping the two power boards over[ as they look identical , gives a “ 2 Blink “ error , the limited info in the manual suggesting that the fault is on the lower board [ main 2 ]
Both boards have a PFC voltage of around 380 volts at switch on before the relays click out
I have done cold checks on both boards and there are no obvious differences
As the manual has only a block diagram of the power supply it’s difficult to be sure of values / voltages
Has anybody seen or worked one of these or similar beasts and managed to diagnose the problem
Thanks for looking
Regards Ken
Ez a fényes pont a képtartalom, vagy szín miatt különböző erősséggel látszik.Feltehetően a háttér világítás hibásodott meg. A készülék hátulja a LED mögött jelentősen meleg. Lehet-e, és milyen módon javítani?
Üdv!
A címben jelzett, a fenti hibával került ide. Közben kiderült, hogy az Y-sus zárlatos volt. IGB-t cseréje után még mindég az 1 kóddal kínlódik. A tápok rendben lévőknek tűnnek, bekapcsolás után megjelennek. Az 1 kódról annyit találtam, hogy LD (main) stby 5v hiba. Tud é erről valamit ? Köszönöm a figyelmet !
A címben jelzett, a fenti hibával került ide. Közben kiderült, hogy az Y-sus zárlatos volt. IGB-t cseréje után még mindég az 1 kóddal kínlódik. A tápok rendben lévőknek tűnnek, bekapcsolás után megjelennek. Az 1 kódról annyit találtam, hogy LD (main) stby 5v hiba. Tud é erről valamit ? Köszönöm a figyelmet !
I posted here a while ago but no answers:
https://elektrotanya.com/comment/reply/91852#comment-form
Made some good progress, but there seems to be a sync problem.
I posted to the EEV blog for more help:
https://www.eevblog.com/forum/projects/rgb-mod-in-panasonic-ctp-2780sf/msg5615065/
Any help or feedback appreciated.
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