8562EC power supply

[hp197]

Hi,

I've blown the power supply of my 8562EC. Don't know how, but the mains switch on the back of the unit was on 110v while I live in the EU and have 230v(ish).
I clearly heard a *poof* when powered on and expected magic smoke, but none.

Line fuse was blown and once replaced the machine tries to start but shuts itself down again (the power on, pop, down sequence indicating a fault in the power supply).
So I dissembled the unit, got the power supply board out, fetch the service manual and watched TSP #116 on YT.

Following the service manual, chapter "Supply Restarting Every 1.5 Seconds". I attached a probe on TP208 and TP206.

Since TP208 goes high before TP206 is going low, I should suspect a short in the secondary (output rectifier, voltage regulators, or another assembly) albeit the manual.

So next chapter I started working on is the "Dead Power Supply". There I come to bullet 14: "Connect the positive output of a current-limited dc power supply to the cathode of A6CR201 (TP206) and the ground to A6TP201."
I think I searched the whole board, top and bottom, but for my life I cant find TP201, also I find it a little intimidating to piggy back a voltage feed the circuit.
Also point 18: "C207 nearest C209" is impossible to find (I cant find a cap with one of the 2 markings on the silkscreen).

Are there people here with experience repairing the 8562EC power supply (note that the EC's have a updated power supply board, without the high voltage part, the screen is a crt)?


and/or are there people who had this before (selected wrong line voltage), what did they do to repair it?

[m k]

Seems that TP 206 and 208 are pretty shorted.

Over voltage can be a bad rap but constant restarting means that something is at least sort of sane.
With some luck it's just a little bit off balance but that pop is not promising.

Do you have a proper manual?
That missing TP is connected to somewhere, try to find those components.

Is there a room for an add-on PSU?