The post did not take the whole picture, get messages of 'too long' and all pictures need to be cropped.
Brightness, position, focus, mag, time, mode, attenuation... all work.

The +220V 'rail'

Cathode of D1101 constant 100V, zero ripple, referenced to ground chassis.

I assume the zero ripple is because it is clipped.

Something that bothers me is

Across C1101 there is minus 25V !

Then, the +120V rail becomes clipped to +95V/+100V at the +220V rail.

If the ground side regulator TR1102 is holding ground too 'high'; the differential to the +220 rail would collapse the +220V rail, wouldn't it ?
The way that regulation-to-ground works regulates simultaneously the +120V rail and the +220V rail, right ?

TR1102 is good.

 

Please measure and report the voltage directly across C1101 with a meter.

 

Minus 25V with digital volttimeter, referenced to capacitor negative. Some times shows minus 27V to minus 30V, depending on how long it has been powered up.
That is the variance I report as +95V to + 100V presence at the +220 rail referenced to chassis ground.
Which is a +120V rail minus the C1101 voltage.

 

Reference to common chassis ground, D1101 anode is 150V peak; cathode is +95 V -no ripple.

This means that at the peak of the anode voltage there is 55V forward bias on D1101 - this is impossible.
Unless:
1. D1101 is open circuit or otherwise disconnected somewhere.
2. D1101 is fitted the wrong way round.

 

Do we know the AC voltages, measured on the right hand side of the connector, between the transformer yellow lead and each of the other transformer leads?

 

Measured :
brown to red 37VAC
red to orange 42VAC
orange to yellow 92VAC
brown to yellow 170VAC

 

You may have misunderstood the instructions.

At P1101 use pin 6 (yellow) as the reference (black meter lead). Then measure and record pin 1 (Brown) pin 3 (Red) and pin 4 (orange) .

 

OK.
Yellow as reference,
brown is 170VAC
red is 134VAC
orange is 91VAC.

With R859 that supplies the horizontal section disconnected, the +120V rail is still +120V,
and the +220 rail is +117V.
The capacitor C1101 now shows only -3VDC. Was -27V in sick condition, should be +100V that added to the +120V rail should produce the +220V
The screen trace shrunk to half a horizontal division, as expected, almost inexistent sweep.

 

Assuming you checked D1101, and capacitor C1101, the area

 

With R859 that supplies the horizontal section disconnected, the +120V rail is still +120V,
and the +220 rail is +117V.
The capacitor C1101 now shows only -3VDC. Was -27V in sick condition, should be +100V that added to the +120V rail should produce the +220V

That does not add up.
If you have 120V on one end of C1101 and 117V on the other, how can measuring across it now give you -3V?
There is something wrong with the circuit or your measurments.

 

That does not add up.
If you have 120V on one end of C1101 and 117V on the other, how can measuring across it now give you -3V?
There is something wrong with the circuit or your measurments.

No, that does add up. 120V tail at 120V, 220V rail at 117V so there is 3V reverse bias across C1101 : so -3V

 

No, that does add up. 120V tail at 120V, 220V rail at 117V so there is 3V reverse bias across C1101 : so -3V

Blame it on me waking up at 2:30AM and then answering at a bit after 8AM. I read it as 217V, even tho' it is 117 and I typed 117V.
Even after 2 coffees!!
I think , recheck D110.

 

Can anyone tell me the values of R1108 and C1108. They are not listed in the service manual.

 

R1108 and R1108 are factory absent on the board. ¿?

 

R1108 and R1108 are factory absent on the board. ¿?

Hence no values.

 

Hence no values.

Apparently the delete function works for values but not for the components and interconnecting lines.

 

Apparently the delete function works for values but not for the components and interconnecting lines.

I think it is fairly rare for a production unit to match the schematic and BOM in all respects.

 

I think it is fairly rare for a production unit to match the schematic and BOM in all respects.

I think it's poor performance to eradicate the parts from the BOM and not eradicate them from the schematic. If they were used on different models, they could have put a note in both locations.

Poor management of their documentation.