Mike wrote:
i have nothing from the horiz circuit. the horiz circuit has failed.

i think U1001 is bad.

i removed the horiz drive xistor. when power is pressed, NO waveform on the
base of the transistor. im looking for a strong saw or square wave i assume.
well i have nothing but a little bit of noise when the power is pressed. and
i have to crank the scope up to see it.

now if i scope out pin 23, the H-drive out. i have the same type of noise,
but a little bit bigger in amplitude.

shouldnt i have a strong defined square pulse? at 15.25khz. well i get a
faint bit of noise. almost like a ring type of noise.


when power is pressed, the 9v VCC to the hoiz osc of U1001 goes present. so
whats left. U1001?

Hi...

What's the voltage on pin 16 u4101? (power on, let it run for a few
seconds while you watch - wandering around?)

Take care.

Ken