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Philips 3a chassis eeprom image?

T

timppa

Jan 1, 1970
0
Where I can find such for my Finnish "region" TV set?
BR24C04 is not fully compatible, but it works... I have tried
I have now X2404P to replace original X2404M , but it might have been
programmed incorrectly. Picture is only black and white lines.
 
E

eddumweer

Jan 1, 1970
0
The eeprom must be preprogrammed for the right 3A tv-set (model.nr.)

Depending the software inside the eeprom al the settings for picture, sound,
txt, tuner and stations are inside the eeprom.
After replacing fine adjustments are needed because of tolerances in the
hardware.

For adjusting see http://home.tiscali.nl/m.majoor/tv__miscellaneous.htm , 3A
chassis

Greetings Peter
 
T

timppa

Jan 1, 1970
0
It is bit hard to adjust those with X2404P because even servicemode is black
and white lines. Also there is quite highfreq noise with that chip.
With BR24c04 I manage to adjust all 14 mem.blocks of serv.mode, but after
leaving service menu atleast 00 to 02 servmode entries are not taken in to
use. I have tested this by chaging tuning of channels in channel memory and
those values causes changes in geometry of unit. But when I enter serv.menu
values that are stored in those block are correct, but again when I leave
menu again those are not taken in to use. for example e/w corretion vertical
linearity etc are adjusted ok.
But for example tuning channelnumber 20 to memory place 01 makes difference
in picture height when I tune there channel number 50 (very low picture).

Not too easy....
 
E

eddumweer

Jan 1, 1970
0
First memorize a station into preselect 1, the if you hear the highfreq
noise, the linefrequency is to low so it looks like the Horizontal
synchronization at adjustment 00 is not good, so go blind into the
servicemenu, because you can't see the 4 stripes, put the number 00 with the
remote and adjust with the volume - or + until the picture is good, then
with the pp button (personal pre) you can memorize it.

After repair you better place two zenerdiodes 5V6 from ground of the x24 to
sda and scl on the same eeprom, this modification is given from Philips to
protect the two lines.

Greetings Peter
 
T

timppa

Jan 1, 1970
0
Hello,
Thanks again! But it didn't help with X2404P. It must have been programmed
with wrong code.
I manage to hear sound but picture does not come up good. Have tried many
times. With BR24C04 I can get almost correct geometry.
I have to check those chips with hex editor....
 
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