Kortek K1-2-V0 problem

[kardenm]

I have a Kortek K1-2-V0 19" monitor.  The picture has collapsed to a horizontal white line.
Can anyone direct me to the most likely components to check/replace?

I can already see that the large (largest) cap (C601?) is bulging and the large resistor screwed to the flyback heat sink/shield is cracked and missing a big chip.  What else has likely been blown? 

Thanks for any input!

[grantspain]

i would have said most likely area around and including the vert deflection ic and its feed voltage,vert amp pot, bad solder joints

[kardenm]

Anybody know what the B+ voltage  supposed to be on this board and where to measure it?
I have inadvertently turned the adjustment pot and don't know where it was originally.

[kardenm]

Ok.  I replaced the large (300 ohm, 15W) resistor (which had virtually exploded).  Checked some of the components around it, fixed melted wires and replaced chassis in monitor.

Now it fires up and I get a normal picture, but this replaced resistor gets VERY hot.  Hot enough to feel the heat on my hand 6 inches above.  Hot enough to burn skin instantly if I were to touch it.

How hot is this resistor supposed to get and WHY cannot I locate this resistor on the schematic I have or in the parts list??  And yes, it's the right schematic.  Part of a manual with pictures, diagrams and all from TEKBUILT inc. for 9", 13" and 19" monitors.  Everything else I've looked at matches up.

[MonMotha]

Got a picture of the chassis and/or link to the manual you've got?

[kardenm]

Found another manual hand labled KT-1450A but looks like for this board.  It DOES show the resistor (R223) in the schematic and the parts list.  Manual from Sejoo Corp.

No, I dont have any link to the manual (from old files) or photos of the board (yet).  Board has on it: KORTEK K1-2-V0 and "chassis no. KTA-915". 

Looking at some more bad solder joints and missplaced blobs of solder from bad soldering in the board's past.

Will update soon as I get a chance to work on it some more.

Thanks!

[kardenm]

I removed an errant blob of solder left from some really poor soldering job.  The bead of solder was shorting from one end of the resistor to the transistor next to it (I'm amazed it worked at all).

Now the monitor works fine and resistor warm but not hot!!! 

[kardenm]

Anybody know what the B+ voltage  supposed to be on this board and where to measure it?
I have inadvertently turned the adjustment pot and don't know where it was originally.

Hand written note on the schematic says "122" and nothing else.  Looks like it's at a spot where B+ should be measured so I set it at 122V.  Seems to be working fine.