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Philips chassis G8.1AA

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tendi

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philips chassis

Hi everyone,
Iam looking for service manual/schematic for the 29' philips tv, chassis G8.1AA.
 

sunnyday

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philips chasis g8

I am also looking for the same chassis service manual , please share if you already got it. thanks
 

tendi

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g8 chassis uses

I still have not got the schematic/service manual for the G8.1AA. However, I succeded in repairing the TV. May be if you post your problem on the forum I, or anyone else may assist.
 

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philip g8 tv

Glad to hear that you solve your Tv problem.
May be you can help :
1) what is the verticla IC used in G8.1A ?
2) where is the location on the main board ?
thanks !
 

tendi

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tuning old philips tv

Sorry for the late response:

The vertical IC: TDA3654Q and the location is 7800.

tendi...
 

sunnyday

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philips g8

thank you for the info.
The problem is : when TV just turned on, it jump . After it is warmed up, the picture stabilized . but still being compressed => it becomes rectangle , top and bottom are black . Do you think it is pure IC problem or some capacitor also ?

Next , do you have the circuit diagram or pcb layout of this verticle IC portion ?
 

tendi

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philips chassis manual

Your problem seems to be around the vertical i.c. Try replacing the flyback/boost capacitor as well as the output coupling capacitor feeding the vertical york.
TDA3654, see attached. The boost cap is connected between pins 6 and 8 of the i.c.
 

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chassis top philips

thanks tendi .
where is the output coupling capacitor feeding the vertical york ?
 

tendi

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tv philips chasis g8

THE COULPING CAP IS CONNECTED TO PIN 5 0F THE TDA3654Q
 

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chassis list philips 2006

Thank you very much for your help, tendi .
 

sunnyday

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philips chassi

tendi, please advice the location item number and component value of :
1) boost cap is connected between pins 6 and 8 of the i.c.
2) COULPING CAP IS CONNECTED TO PIN 5 0F THE TDA3654Q
thanks.
 

sunnyday

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philips chassis g8.1

I have changed a new IC and coupling capacitor, the screen no more flickering =>I think the problem has been solved :)

But there still have black portion at top/bottom screen.
When turn to TV test signal pattern, the circle is not so round . I supposed the TV needs some tuning . I remenber in old day, there are knob/resistor at the back of TV for user to adjust the pattern to expand/contract the pciture verically/ horizontally, this is to get the picture fill in nicely to the whole screen .
May I know where ( which variable components) I shall adjust to get the tuning done ?
thanks !
 

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