Tempest - need some help

Steverd

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Just got a Tempest.
It plays OK, but the image should be sharper, see the score image.

Also on the test screen, the test doesn't line up with the:
142, 0,0,0,0 its shifted down one line AND the X111 above the
Bonus Adder, two of the X111 are shifted down into the word BONUS.

Any idea what's going on here?
No errors on the ROM test screen.

tempest-1.jpg

tempest-2.jpg


Thank you,
Steve
 
It looks sharp to me, but you can mess with the focus knob on the flyback.

There are vector alignment pots on the game board, and they are not for the faint of heart, but not as bad as adjusting convergence.
 
Flip the switch inside the door to put it into test mode. Rotate the spinner till it says hit fire and super zapper for self test. That will put you into the test screens. Use the slam switch next to your key lock to go to the diamond pattern with the square around it. One there use your pots on the pcb to adjust the look of everything. Brightness is sharpness are controled by the knobs on the HV cage like bungy said. Make sure you do not turn the brightness up so high that a dot appears in the center of your screen. It will leave a permanent burn in the screen.
 
Your BIP alignment is out of whack.

Goto the + on the test mode and align it. The Y needs the most adjustment. It won't take much.
 
Your BIP alignment is out of whack.

Goto the + on the test mode and align it. The Y needs the most adjustment. It won't take much.


OK, I see X BIP and Y BIP on the PCB glued down.
I'll adjust those in the morning.

Which test screen do I adjust these on? The one with the diamonds?


Thank you,
Steve
 
Last edited:
Even though my image is pretty good right now:

How about on this test image?
The bottom right red doesn't line up?
Ideas on adjustment?

test-3.jpg

Thanks again!
Steve
 
Looks like a monitor problem.

Goto the Cross hatch test pattern, and turn the spinner to get what should be the purple cross hatch.

Hard to tell but it looks like the red might be out of convergence.
 
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