Kortek KTA-915 (KI-2-VO) blows F602 on power up

wolfeel

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I have a Kortek KTA-915 (KI-2-VO) that upon power up blows F602 (1 amp 125volt). Any advise where to start and does any one have a schematic? I am guessing start with testing Q601.
 
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I am thinking I can stuff an Electrohome GO7 Chassis in this and it would work. Can anyone verify this for me?
 
Once again, Thanks Ken!

Without having looked at the links you gave me, am I on the right track with Q 601???

The ohms seemed so close to a GO7 yoke!
 
Hi Ken,

I have the same chassis that I just installed a new flyback/ hot and caps and still get no neck glow at all. What do I need to check next? If I just had a flow chart that would be a great start. Resistors/ doides to check ?? Oh and this was plugged in without an iso transformer hence the rebuild.
 
It is always nice to get confirmation that I am actually learning. After looking at the schematics I also tested Q602 and 603 and they were also bad. Is Q604 also part of the power supply (still not 100% on reading schematics in terms of flow)? Q604 tested good.
 
Hi Ken,

I have the same chassis that I just installed a new flyback/ hot and caps and still get no neck glow at all. What do I need to check next? If I just had a flow chart that would be a great start. Resistors/diodes to check ?? Oh and this was plugged in without an iso transformer hence the rebuild.

I have a hard copy (not scanned yet) of a Randy Fromm flow chart for this monitor. It's under copyright and I would not be able to post it here.

I will send my Kortek repair guide to Michael Roma to post on his site.
 
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There are some minor variations in these Kortek chassis. Some values or part location numbers might be different.

Here is an example: on some schematics resistor R610 is a 5 ohm 5 watt. It is silkscreened on the circuit board as R612. When this resistor goes open there is no high voltage.

Sometimes zener diode D401 goes weird. It is a type 05Z12Y.
 
Just tested r610 and its open on my chassis - at least its a fresh start

Now i have to order another part- uuuurrrghhhhh!

thanks ken
 
Got the parts I needed and installed them. Turned the juice on, could here some typical noise in the tube like it was warming up and then............smoked the fly! All fuses checked good so solved one problem but now need another part.

My flyback is labeled as #KFS 60737.

Ken - is #KFS-60291 as listed in the repair guide a matching replacement?
 
Was the flyback still the original one? If so, they are known to arc to the metal flyback cage particularly around the focus knob.

Probably the flyback was arcing originally which took out the power supply components.

KFS-60737 = HR7199 (ten pins, all spaced equally)

KFS-60291 = HR8508 (ten pins, spacing between pins 9 and 10 is greater than other pins)

If yours originally had a KFS60737 then it should be replaced with the same number or the HR 7199.
 
KFS-60737 is the one that was in there when I got it from someone else so I am assuming it is original. I did not see arcing but just lots of smoke coming from the fly. The fuses all stayed good. Working on getting a 60737 from Bob, just when I pop it in I don't fry the new one!
 
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