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Author Topic: Squeezed G7200 image, Caps to replace?  (Read 1321 times)
blanka
Trying to get the cartridge in...
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Posts: 9


« on: August 23, 2015, 11:21:43 PM »

I just turned on my G7200 after 2 years, and the image was shrunk to about 1cm height. The width was OK, I could identify sprites, so it seems there is something wrong in the V-bending circuit of the CRT tube.
Did anyone have a similar problem, and know if you can fix it with a cap replacement?
I have the service manual. Which caps should I replace?
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Playing Q*bert on a very nice and shiny G7200.
Rene_G7400
Pedit5
I take the Videopac and leave the Canoli!
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« Reply #1 on: August 24, 2015, 01:16:43 AM »

Have you already tried to adjust the height with variable resistor R25?
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gertk
Post Axe Pete!
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gertk64
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« Reply #2 on: August 25, 2015, 06:11:06 AM »

If turning the pot R25 does not do the trick check if the supply voltage at the TEA1011 is up to spec.
Pin 2 must have 24 Volts, pin 12 is at 11 Volts.

If those are ok you might try and replace C49, C50, C51 and C52 and check every resistor around the TEA1011 (especially R23 which is a special fusible resistor).

Be careful though! There are some nasty voltages inside a G7200! Shocked
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>>G7000 G7200(P+S) G7400 N60 JET27 VG5000 ZX80 ZX81 ORIC-1 COMX35 Aquarius<<
TomBeck
Give this man a Jopac!
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« Reply #3 on: August 25, 2015, 09:28:37 PM »

Be careful though! There are some nasty voltages inside a G7200! Shocked

I hope your warning comes not too late.  Evil

We will know, when he come back.  Cheesy
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Wink  Killed the Killer Bees  Wink
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