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Too much repeat information...trying to catagorize information.

Mike><>



Kortek Monitors;

Problem; Horizontal goes out intermittently.
Solution; Resoldered CN201.

Problem; Horizontal Tare.
Solution; Repl. C123.

Problem; Blackout (flyback ticking).
Solution; Repl. Q402 (H.O.T.) & C421.

Problem; Blackout (board burnt under R126)
Solution; Repl. R126 & C126 (domed cap), powered up and R512 started glowing...checked circuit and Q501, Q502 both fried...Repl. R512, Q501, Q502, & C508...tested good.

Problem; No dynamic focus.
Solution; Repl. C420.

Problem; Pincushion problem.
Solution; Adjusted VR403.

Problem; Won't power up.
Solution; Repl. Q402 & C421.

Problem; No blue.
Solution; Resoldered CN201.

Problem; Went blank.
Solution; Repl. Q402, C421, C123, R123, & R125.

Problem; Monitor won't come up.
Solution; Repl. flyback XFMR.

Problem; Dark stripes on left side.
Solution; Repl. D904 on dynamic focus bd.

Problem; Flyback pulsing.
Solution; Repl. flyback XFMR.

Problem; Monitor won't adjust, picture too wide.
Solution; Repl. C420 (dynamic focus bd.).

Problem; Pincushion.
Solution; Repl. dynamic focus bd.

Problem; Competition stripes on left side of monitor.
Solution; Repl. dynamic focus bd. (usual repair D904 on DFB...component out of stock).

Problem; Blackout.
Solution; Repl. D111, C126, & C122.

Problem; Touch screen error.
Solution; Repl. U10 (ILQ2) on touch screen control bd.

Problem; Intermittent Horizontal compression.
Solution; Resoldered several cold solder joints (look for dull looking solder).

Problem; Bad won't come up.
Solution; Repl. C126 & C408.

Problem; Touch screen not lining up.
Solution; Calibrated touch screen & tested good.

Problem; Vertical "jitter" (screen "shakes").
Solution; Repl. C408.

Problem; Touch screen not working.
Solution; Repl. electrolytic capacitors & U2 on touch screen control bd.

Problem; Screen strobes.
Solution; Repl. C406, C407, & C408.

Problem; Monitor was found black.
Solution; Repl. flyback XFMR.

Problem; Intermittent blackout.
Solution; Repl. neck bd.

Problem; touch screen bad, smoke coming from back?
Solution; (Multi. prob.) Repl. R126, R512, Q501, Q502, & IC501.

Problem; Went black.
Solution; Repl. dynamic focus bd. & IC401.

Problem; No color, gives you a migraine...
Solution; Restore & rejuvinate (R/R)...red gun won't last long.

Problem; Went dark, smelled burnt.
Solution; Repl. Dynamic focus bd. (D904 fried), C418, C423, IC401 & tested.

*NOTE* Though not stated, all repaired monitors are throughly tested before restocked.

Looks like this is going to work...Kristel & Wells-Gardner Monitors...

Mike><>



Kristel Monitors;

Problem; Blackout.
Solution; Removed nut from main board & repl. fuse.

Problem; Horizontal foldover.
Solution: Adjusted VR602.

Problem; Sounds like power supply is arcing.
Solution; Repl. D502 (BA159=NTE558...subsistute 1N407=NTE125).

Problem; Went blank.
Solution; Repl. Q602 (H.O.T.).

Problem; Picture shakes.
Solution; Repl. C609.

Problem; Blackout.
Solution; Repl. IC801 & IC201 (bad auto bias ckt.).

Problem; Blackout.
Solution; Plugged in neck board.

Problem; Picture out of wack.
Solution; Adjusted VR304 (pincushion pot).

Problem; Does not work.
Solution; (multi. prob.) Repl. Q501, D508, C521, Q602, C609, & F501.

Problem; Vertical jitter.
Solution; Repl. C313, C311, C310, & C331.

Problem; High speed wobble (screen shakes).
Solution; Repl. C609.

Problem; Dim picture.
Solution; Repl. C524, C525, & R/R.

Problem; Dark screen.
Solution; Repl. C525, C921 & R/R.



Wells-Gardner Monitors;

Problem; Screen went white.
Solution; Resoldered front leg on bright pot...tested good.

Problem; Won't come up.
Solution; Repl. C108 & C110 on power supply.

Problem; Smoked cap.
Solution; Repl. C723.

Problem; Blackout.
Solution; Repl. electrolytic caps in power supply.

Problem; Blackout (smoked).
Solution; Repl. C723.

Problem; Blackout.
Solution; Repl. C117 on power supply.

Problem; Horizontal tare.
Solution; Repl. electrolytic caps on power supply.

Problem; Bad monitor, all white & staticy.
Solution; Same as above (S.A.A.).

Problem; Bad monitor went blank.
Solution; Repl. Q701 (H.O.T.).

Ceronix, Tovis, & one lonely Tatung Monitor...



Ceronix Monitors;  (see below for Ceronix troubleshooting guide)


Problem; Blackout.
Solution; Repl. 127 (MPSA64 PNP xistor) & 115 (power supply IC).

Problem; Dark screen.
Solution; Repl. 036 (MPSA64) & 071 (PN2222A NPN xistor) both part of beam current limit ckt.

Problem; Dark at edges of screen.
Solution; Restored/rejuvinated (R/R) & tested.

Problem; Smoked when powered up.
Solution; Repl. 276 (resistor), 277 (resistor), 278 (resistor), 210 (LM393N IC), 355 (LM339 IC), & repaired traces.

Problem; Screen strobes.
Solution; Repl. PRA "I".

Problem; Monitor black.
Solution; Repl. 377 (LA7838 Vertical deflection IC).

Problem; Monitor off shelf, did not come up. (Aristocrat)
Solution; NPF---*NOTE* These monitors are famous (infamous) for the connector bending back, thus not making good connection with the machine...the plug should be visually checked to make sure the mounting bracket is at 90 degrees!!!

Problem; Blackout.
Solution; Repl. 115 (power supply IC).

Problem; Blackout.
Solution; Repl. 115, 440A (diode), & 460 (IRF520 MOSFET).

Problem; Blackout.
Solution; Repl. 136 (2SK1446LS MOSFET), 440 (diode), & 460 (S.A.A.).

Problem; Bad monitor (Aristocrat Monitor).
Solution; NPF-bent connector bracket on monitor to conform to game connector.

Problem; Center raster washed out (center screen distortion).
Solution; Repl. 182 (220uF, 100V +/- cap).

Problem; Power supply churping.
Solution; Repl. isolation XFMR.

Problem; Blackout.
Solution; Repl. 468 (24V relay)

Problem; Blackout.
Solution; Repl. 927 (CA3224E Auto Bias IC).

Problem; Blackout.
Solution; Repaired ISO power supply, repl. 181 (160V zener diode), 927 (S.A.A.), & fuse.

Problem; Bad.
Solution; Repl. 468 (24V relay, part od degausing ckt.).

Problem; Has green bar down center of the screen (or skunk monitor...white center, black sides).
Solution; Repl. 182 (220uF, 100V +/- cap.).

Problem; Blackout on test station.
Solution; Repl. flyback XFMR (arcing under the board).

Problem; Blackout.
Solution; Repl. 115 (P/S IC), 337 (2SC4159E NPN xistor), 033 (LM324 OP Amp IC), & installed jumper from 019 to ground.

Problem; Shows retrace lines.
Solution; Repl. 415 (Horizontal control IC).



Tovis Monitors;


Problem; Monitor dark
Solution; Repl. neck bd.

Problem; Screen black, no power.
Solution; Repl. flyback XFMR.

Problem; Blackout.
Solution; Same as above (S.A.A.).

Problem; Blackout.
Solution; Repl. C511.

Problem; Blackout.
Solution; Repl. main bridge rectifier.



The lone Tatung;

Problem; Monitor black.
Solution; Repl. C331.

Tovis schematic...see attachment...

Kortek 1982F schematic...see attachment...

Some of the many Kortek schematics...

A little more info on Kortek monitors, from Delphi forums...

Mike><>


I got this information from Casino Tech. They are the authorized service for KORTEK. When you loose H-synk, when the screen goes dim or when the monitor blanks out, replace this group of caps. Some of these caps have different ratings than what your taking out. TRUST ME! You'll thank me for this.

C107 - 47uf, 50v

C108 - 1uf, 50v

C123 - 1000uf, 16v

C126 - 47uf, 16v

C408 - 22uf, 160v

C421 - 10uf, 160v (always replace this if you replace the H.O.T.)

C506 - 47uf, 50v

C508 - 100uf, 50v

At first I would test all of these caps but they always failed 10% tolerance. replacing these is the first thing I do. It has saved me a lot of time and troubleshooting. The H.O.T is usually the next thing to go so I replace it with this set.

(written by kforeman)

just a quick note:

the 1703 and the 1903 are almost the same.  usually the symptoms and repairs are identical yes

the 1403 is a little different, but has very close to the same component locations so troubleshooting is a matter of checking the same area of the board as on the 1703 or 1903. propeller

A few problem monitors I came across in the last few months...

Kortek KT1703N
     Problem; Takes a long time to come on.
     Solution; Repl. IC101 & tested.

     Problem; Screen won't center.
     Solution; Repl. C420 & tested.

Ceronix
     Problem; Blackout (keeps blowing H.O.T.s).
     Solution; Repl. 460 (IRF520 MOSFET) & tested.

     Problem; Monitor shaped like hour glass.
     Solution; Repl. 460 & tested.

     Problem; Monitor won't come up.
     Solution; Repl. 477 (HER205 diode) & 438 (FR205-F diode) & tested.

Wells-Gardner
     Problem; ? (no tag).
     Solution; Removed nut from ZD301, replaced ZD301, C200, U301, U302, U303, U700, & tested.

I believe this something worth passing along...a couple weeks ago I had two Kortek monitors that were slow to initialize when powered up(up to 10 minutes before the raster would start glowing...).  The problem component(s) turned out to be C107 &/or C108...both capacitors work with IC101 for a FBT lock...

Mike><>

Schematic for backlight inverter...

Mike><>

Schematic for a Kortek used in a Bally...

(written by lahillbilly)

I have some wells gardner monitors in aristocrat machines, that are missing every other horizontal line on the bottom 1 in of the monitor sreen. Can not take monitor off floor to trouble shoot. Any help apreciated.

Hi la...,

Do you have model number on the monitor?  Just from the description, it sounds like a capacitor has flaked out on you...look for an electrolytic cap that has domed top in the horizontal circuit...

Hope this helps...

Mike><>

Had a couple tough ones recently and thought I'd share the repairs...

The first was a Ceronix monitor used in a Konami.  The problem originally was a blacked out raster, I checked the H.O.T. and found it shorted... easy fix...replaced the H.O.T. (433), powered the monitor up and it came up with a perfect picture...for about one minute hissy fit and blacked out, again...looked a little further in the circuit and replaced IRF520 MOSFET (460) & the H.O.T., again...powered the monitor up and it came up with a perfect picture...for about one minute (again) hissy fit hissy fit, well this went on a couple more times with the same results.  I finally dug my head out of my donkey and found LA7851 (415) was overdriving the H.O.T. and surrounding ckt. applause

The second one was a Kortek 1982F used in a IGT slant top...the monitor had horizontal collapse (a single line running vertically on the raster....( l )).  Checking the schematic I started assuming the problem "had" to be in one of two ICs that the horizontal sync went through...silly me duh!  As it turned out the H.O.T. (Q302 a SC25584) was flakey...though it checked "good" on a multimeter.  I need to thank a tech at CasinoTech for this repair yes...I might still be replacing components in the horizontal circuit if he hadn't clued in to looking closer at the H.O.T. !!!

Hope one or both of these helps someone out there...
Mike><>

(written by lahillbilly)

I have a Korteck monitor model 1703N that has 3 diagonal that has 3 diagonal black lines about one half inch wide. Any help would be appreciated.

Hi lahillbilly,

I'd probably start with this one...
Problem; Dark stripes on left side.
Solution; Repl. D904 on dynamic focus bd.
If not, try...
Problem; Horizontal Tare.
Solution; Repl. C123.

If you could post a picture or better description, I might be able to figure a better solution...
Hope one of these helps...

Mike><>


(lahillbilly said thanks at the end)

schematics for kortek 1403

Had a problem with a Tovis monitor today, at first glance it looked like a shorted H.O.T.(Q308), but once I removed it from the circuit it checked ok, and empty position still showed a dead short across all three legs.  Looking a little deeper into the circuit I checked D301 it showed a dead short, until I removed it from the circuit then it checked good, too.  After checking a little further, I found the flyback transformer had cracks and one side had "bubbled"...one of these days I'm going to remember to do a visual first duh!

Mike><>

Thought this might be useful to someone out there...thanks to the folks at Sencore!

Mike><>

******(THIS IS A GOOD ONE)*****

Some may find this helpful...thanks to Sencore...

God bless,
Mike><>

I don't believe these are quite as available as Ceronix, Kortek, Or Kristel schematics...thanks to Sencore...

BTW...the last one that says "Schematic" is for a Tatung...

God bless,
Mike><>

(written by elvisc)

Can anyone have any software for windows for testing monitor resolution, color, linearity, focus,... and with an animation in diferent resolution to test monitor for more time (about mor than 1 hour)...
Thanks.

Hi elvisc,

I don't know of any program like that for a computer...Sencore makes a "VideoPro" test equipment that has many of the test features you mention..."click" on the link if you're interested;

http://sencore.com/products/vp401gaming.htm

Good luck & God bless,
Mike><>

thanks...this is an good test equipment...

I have found this freeware program on internet
http://www.softpedia.com/get/Multimedia/Video/Other-VIDEO-Tools/Nokia-Monitor-Test.shtml
Its good for testing, but this program don't have the option to change resolution and don't have an animation to test monitors for more times

I need something like this program but freeware becouse in my company its a problem to purchase this program
http://www.passmark.com/products/monitortest.htm

Its have
Looped testing to continually test your monitor
and
Support for all available resolutions and color depths
this is that I need...

If anyone have an program like this.

Thanks

I just went to the second site you mentioned...I just assumed the cost was in the hundreds if not thousands of dollars...Dude...if the company you work for can't afford $24.00 you NEED to find another employer!!!

If the program would make my life (work) easier, I'd purchase it myself and let the boss know that when I left the program would be leaving with me...

God bless,
Mike><>

I don't think I've posted this before...sometimes I forget...must be oldtimers settin' in...

God bless,
Mike><>

Kristel LCD Inverter Schematics (Plus)...see attachments...

God bless,
Mike><>

Even more, Kristel LCD Inverter Schematics (Plus)...see attachments...

God bless,
Mike><>

A little FYI...

I've been having problems with a couple bartop monitors (Ceronix 1493s).  I couldn't get the raster adjusted in the center of the screen, there was a gap about 1 1/2" to 2" wide on the right side that was blank.

I tried everything that looked like it would have an effect on the horizontal position on the schematic next to no luck at all (tried substituting some resistors and accomplished moving the raster farther to the left).

I finally took my problem to the techs on Delphi Forums and got the answer to my problem two small electrolytic capacitors at positions 344 & 347 had evidently dried out...thanks to dickcet & OkieMike on that site for the information...

Delphi Forums is another excellent source of information!

God bless,
Mike><>

I'm not sure, but I might have posted this previously...
I got a Kortek monitor that had compressed vertical signal...the top half of the raster had collapsed, the bottom half looked normal.  Turns out that C119 and C122 were the problem in the circuit...electrolytics tend to dry out after a while...

God bless,
Mike><>

In the past few months I come across some problem monitors...the monitors worked fine on the IGT 960 test station, but on the floor the monitors wouldn't power-up.

Thanks to MBTECH3 for the heads up on the repair for this Kortek monitor fix...this is from delphiforums;
http://forums.delphiforums.com/n/mb/message.asp?webtag=slottech&msg=5990.1 (http://forums.delphiforums.com/n/mb/message.asp?webtag=slottech&msg=5990.1)
"I had seen alot of those on the 17" which I had alot more of, now we are all LCD. The fix for that was C107 47uf@50v. I believe the tester kicks out around 220v AC for monitor power which is not  affected by a broken down C107. On the floor the games are only putting out 110v AC for monitor power which is affected by a bad cap in the power up circuit. As best I can remember."

This has helped me repair monitors that had me wondering about the floor techs...

God bless,
Mike><>

Just a FYI...

A  Ceronix LCD Inverter Board (P/N CPM2243) can substitute for a Kortek LCD 17"/19" Inverter Board (GH059A).

We've had a Ceronix Inverter Bd in a Kortek LCD Monitor for over two months and thus far it has functioned flawlessly.

Good Luck & God bless,
Mike><>

got a kortek p42sx pdp
when powerd up geen light on then hear click
goes off green light still lit
any one help or kno were to get board diagrams
thanks in andvance
ps some off the board inside say samsung on them

Hi king13,

I hate to appear ignorant, but I have no idea what a "p42sx pdp" is...

Is it a CRT or a LCD?  If it is a LCD the green light may indicate that the A-D board is receiving every signal that it is "looking" for (Horz. sync, Vert. sync, frequency, etc...), if this is the case, you probably have a faulty inverter board.

Sorry, I'm not of more help...

God bless,
Mike><>

its a 42 plasma
think i will break it down for spurs
thanks for reply

Thanks for the information...sorry, all I know about plasmas is that they are out there.  Maybe someone else will be able to help you out with this one...if anyone can contribute, I'm sure it will be appreciated!!!

God bless,
Mike><>

Somebody posted a solution for that kind of problems the other day i remember...

http://www.youtube.com/watch?v=lKJcBx9cXKo (http://www.youtube.com/watch?v=lKJcBx9cXKo)

just be careful mate!!!

All that and he didn't even have to do a reboot.......

I remember this one from the first posting.

I wonder what he charges an hour and if he makes house calls? :5- :97- :97-

Thanks for the re-post SAT.  :71-

Yeah that was so much fun for me the first time as well...  what a crazy man :D XD

Hello,

Do you guys have any information for any other model of Kristel, Kortek, Ceronix or Wells Gardner monitors?  I have done some work myself on boards of these monitors, and found faulty parts, but no schematic of BOM for values of the parts for replacement.  Your help would be greatly appreciated.