Been working on this for a few days.

[pito]

It seems that X channel is ok. In X Y mode both channels are the same, so you can compare DC voltages in different points of X channel with Y channel.

I could not get it to scan to kilo HZ. = I am able to observe 15 kHz, another one https://www.zeitnitz.eu/Scope_en

[pito]

oops Typing error,
X should be Y instead, and Y should be X instead

[Mark-VA]

Voltage readings high

[Altra]

The schematic is blurry what are the correct printed voltages for the two points? A few volts difference is not a problem. Look for the horizontal sweep generator on the schematic. It will be a ramp generator that feeds or modulates the horizontal Amp.

[Mark-VA]

210 and 93

[pito]

post #18 = voltages are ok, show lower part of the schematic with horizontal position potentiometer

[Mark-VA]

[pito]

R105, rotating it voltages on wiper and collector Q16 are changing ?
where is connected another end of R62 ?

[Mark-VA]

I’ll report back later

[Mark-VA]

Q16

[Mark-VA]

When rotating R105 these are my readings

[pito]

post # 26 = it is a transistor Q16 ?
are you rotating potentiometer on front panel, top right corner ?

[Mark-VA]

Yes Q16
Yes top right button labeled Horizontal "position"

[pito]

It looks like on emirrer you have -4V instead of +4V
and you have SWP switch in position 3 = x-y ?

[Mark-VA]

Noticed the -4 so I check the diode coming into the transistor and it's okay.

Yes on SWP switch to x-y
Tried the switch both ways and still couldn't change the -4v