Albert <aodiversen@...> ha scritto:
The time base sends the unblanking pulse to the main frame *only* during the sweep. Since you have no sweep the dot is blanked and you shouldn't see any effect of the Intensity control.
I suppose the time base doesn't run in AUTO mode either?
Faulty Q2577 and Q2579 can produce a Sweep Lockout condition at contact B8 of the main interface connectors and block the time base.
Thank you Albert, more details:
I'm testing with the TB in A Hor., B hor. is empty,
I have the trigger and the gate pulse out on the back.
The TB is in auto.
A sweep lockout (J3-B8) is low enough, I think (about 0V),
B sweep lockout (J4-B8) is about 3.8V.
Tried also swapping U2530 with U2540, so I can select B Hor.
With TB in B slot still no sweep, in this configuration I have no
working trigger.
I extracted the main interface board, I'll check the diodes and
transistors, and clean it a bit.
Fabio.
----------------------------------------------------------------
This message was sent using IMP, the Internet Messaging Program.
