R
Russell Griffiths
Guest
SHARP CX51K4.
I would like to thank Rudolf Ladyzhenskii for his assistance
in repairing this ctv.
These were the symptons.
***************************************************
The sharp randomly turns itself off, the LED might
flash red/remain green/turn red/or go out completely.
And the pic. is too big vertically.
I thought the TDA9381PS (IX3368CE on schematic) was
heat sensitive and replaced it.
However, the tv would not even turn on an L.E.D.
I could only hear the p/s ticking quietly.
I put the original TDA9381PS back in and replaced the EEPROM.
The set now looks like it might stay on, but the pic. does not reach
the bottom of the screen. And on a couple of channels there are fine
lines across the screen.
Repair
********************************************************************
The sevice mode in entered by shorting 2 links along one edge of the
main pcb known as 122 and 124, there is a hole in the board under the
two links.
By entering the service mode, I was able to correct the data using the
service manual.
It seems the only problem the tv ever had was corrupted data in the EEPROM.
It is a real shame the TDA9381PS chip appeared to be heat sensitive which
made me buy a replacement.
It is an even bigger shame the new chip seems to be a dud, as the ctv would
not even turn on with it installed.
Russell Griffiths.
I would like to thank Rudolf Ladyzhenskii for his assistance
in repairing this ctv.
These were the symptons.
***************************************************
The sharp randomly turns itself off, the LED might
flash red/remain green/turn red/or go out completely.
And the pic. is too big vertically.
I thought the TDA9381PS (IX3368CE on schematic) was
heat sensitive and replaced it.
However, the tv would not even turn on an L.E.D.
I could only hear the p/s ticking quietly.
I put the original TDA9381PS back in and replaced the EEPROM.
The set now looks like it might stay on, but the pic. does not reach
the bottom of the screen. And on a couple of channels there are fine
lines across the screen.
Repair
********************************************************************
The sevice mode in entered by shorting 2 links along one edge of the
main pcb known as 122 and 124, there is a hole in the board under the
two links.
By entering the service mode, I was able to correct the data using the
service manual.
It seems the only problem the tv ever had was corrupted data in the EEPROM.
It is a real shame the TDA9381PS chip appeared to be heat sensitive which
made me buy a replacement.
It is an even bigger shame the new chip seems to be a dud, as the ctv would
not even turn on with it installed.
Russell Griffiths.