Author Topic: changing monitor (Read 9301 times)

hunty3000 · « **Reply #40 on:** September 04, 2006, 04:05:35 pm »

i swopped the whit and black over and the screen stayed the same but just smaller. ive checked all the wiring and took the videoboard apart to check for damage. nothing there tho. i gunna remake the video cable tommorrow so theres no junction box. ill get a camera again so i can take some pics for you.

hunty3000 · « **Reply #41 on:** September 09, 2006, 06:36:39 am »

ive remade the cable but its still the same grey screen. its doing my head in now.

grantspain · « **Reply #42 on:** September 09, 2006, 12:50:06 pm »

you have either one of two faults;
1-no signal from video board
2-blanking fault on monitor
if you could get a different signal source on to your monitor it would prove the fault

hunty3000 · « **Reply #43 on:** September 09, 2006, 01:52:49 pm »

hi, whats a blanking fault. and is there away i could test the signal without a signal generater
thx

grantspain · « **Reply #44 on:** September 09, 2006, 03:08:53 pm »

you could hack a scart cable from a dvd just to see if it gives a picture(using the r,g,b)but you can't leave the picture on too long-to be honest if you work in the trade then just whip out the monitor,take it to work and rig it up on a video cab-like i said before you're going round in circles because you don't know if the fault is on the monitor or the cabinet,you have to prove one is o.k
blanking faults are usually caused by the i/c that decodes the signal from the game board in the monitor itself

hunty3000 · « **Reply #45 on:** September 09, 2006, 03:37:20 pm »

ill see if i can borrow the signal generator from work on monday. ill let you know what happens

hunty3000 · « **Reply #46 on:** September 12, 2006, 12:25:22 pm »

i just put the signal generator on it, and it was still the same grey screen so i guess its the monitor what is broke. i ent got a clue about fixing them so help is definitely gunna be needed here.

grantspain · « **Reply #47 on:** September 12, 2006, 12:31:27 pm »

check that adjustment board to check the contrast pot not knackered

hunty3000 · « **Reply #48 on:** September 12, 2006, 12:58:18 pm »

ill check it now but i dont think it is that because there is about 5 thin white lines across the screen aswell

grantspain · « **Reply #49 on:** September 12, 2006, 01:12:03 pm »

without a pic i can't tell what it is,i would be guessing-but i guess the screen volts is too high -i have never seen a blanking fault on a kortek of that type,the only thing similiar i have seen is a broken contrast pot

hunty3000 · « **Reply #50 on:** September 12, 2006, 01:19:19 pm »

ill have a play with the screen volts. ill get the camera 2nite, what do u want some pictures of,

hunty3000 · « **Reply #51 on:** September 12, 2006, 01:47:08 pm »

i got a picture at last. is there a sensitivity control for the adjustment board because it is really sensitive and i can't get the screen to stay still.

grantspain · « **Reply #52 on:** September 12, 2006, 01:52:57 pm »

right make sure now the sinc wire is in the correct place on the plug(because i think you swapped the sinc and common),then check for dry solder joints on the adjustment board and ant physical damage to the pots

hunty3000 · « **Reply #53 on:** September 12, 2006, 02:06:12 pm »

its all working now, just the H-hold pot is broken i think because if u give it a wiggle it moves the screen so ill get a new 1 from work 2moz and that should be it for the screen. thanks for the help mate very much appreciated.
proberly need a hand on wiring the hopper when i finish this screen off. shouldn't be to difficult, should have a mpu4 manual at work.

grantspain · « **Reply #54 on:** September 12, 2006, 02:20:08 pm »

is the entire plug for the payout missing from the mpu4?if you phone barcrest tech they will tell you the pinout,very helpful guys up there

hunty3000 · « **Reply #55 on:** September 13, 2006, 12:33:07 pm »

i can't get the screen to stay still, its to sensitive. i replaced the h-hold pot but its still the same. is there any thing i can do to adjust the sensitivity. what does the white pot on the monitor board do, it next to the plug for the adjustment board.
thx

grantspain · « **Reply #56 on:** September 13, 2006, 12:59:57 pm »

thats the b+ pot,don't touch-you may need to link the sinc wires h+v on the plug-i guess you have already tried the sinc switch,right?

hunty3000 · « **Reply #57 on:** September 13, 2006, 01:32:21 pm »

yeah i tried switching the sincs it was just stayed the same. ill try join them 2gether.

hunty3000 · « **Reply #58 on:** September 17, 2006, 04:15:51 pm »

hi ya i still carnt get the screen to stay still, im gunna get another pot 2moz incase it might be that, but i think it might be something wrong with the h sinc but i cannot find any info on the barcrest video board.

grantspain · « **Reply #59 on:** September 17, 2006, 04:21:25 pm »

many millions of years ago i had a game board called world rally that would never work with kortek but was fine with other monitors maybe you need to put a resistor on the sinc wire

hunty3000 · « **Reply #60 on:** September 17, 2006, 04:24:48 pm »

i need to find a manual for the monitor then to find the voltage inputs and stuff dont i

grantspain · « **Reply #61 on:** September 17, 2006, 04:36:41 pm »

just try a few low value resistors in parrallel until you get the right combination,start at 100 ohms-

hunty3000 · « **Reply #62 on:** September 17, 2006, 04:38:26 pm »

ill have ago 2moz, just put it across the sinc wire

grantspain · « **Reply #63 on:** September 17, 2006, 05:05:38 pm »

your service manager should know how do this,and if he don't then he should not be a service manager-and you can tell him from me

hunty3000 · « **Reply #64 on:** September 17, 2006, 05:08:49 pm »

lol, ill ask 2moz. do u think it might be easyer to get a new wells monitor to fit in it instead

grantspain · « **Reply #65 on:** September 17, 2006, 05:24:02 pm »

yeah,but where will you find a wg7000 series in this day and age,two years ago i worked for gamestec(and no disrespect)every day the service managers would come and ask my advice on repairs,always i would help but is it not a discrace that a service manager not know how to repair anything-thats why i left for spain

hunty3000 · « **Reply #66 on:** September 17, 2006, 05:32:38 pm »

yeah it is bad, my manager knows alot tho, just carnt ask him about this machine if u know what i meen

grantspain · « **Reply #67 on:** September 17, 2006, 05:34:42 pm »

why?did you nick it?

hunty3000 · « **Reply #68 on:** September 17, 2006, 05:38:34 pm »

no it was getting thrown away so sum1 had it. but they dont let you have machines thats getting thrown out

hunty3000 · « **Reply #69 on:** September 19, 2006, 11:57:13 am »

i changed all the pots but carnt get the h sinc to stay still, i dont know were the h sinc cable goes on the video board because i carnt find any manuals to get the pinouts for it. even if i disconnect the h sinc the picture is still the same so dont think i need it any way. ive took a picture of the video board connection and of the video board and mpu4

hunty3000 · « **Reply #70 on:** September 19, 2006, 01:07:39 pm »

just took the sinc wire off completely and now it stops for a few seconds when i adjust it, but then moves a little bit. i think i might be able to stop it tho. isnt it weird that it dont need the sinc wire

grantspain · « **Reply #71 on:** September 19, 2006, 01:38:41 pm »

thats why i suggested putting on a resistor as the sinc signal maybe too high for that monitor btw your wiring is awful

hunty3000 · « **Reply #72 on:** September 19, 2006, 01:52:52 pm »

lol, thats good wiring that is.
what do u rekon i should do then, put the sinc back on with a resistor because i carnt get it to stay still. it only moves very slightly now tho.

grantspain · « **Reply #73 on:** September 19, 2006, 02:01:22 pm »

if your happy with it leave it alone,but i would maybe try a few different values to see which suits best-but like they say "if it ain't broke don't try to repair it"

hunty3000 · « **Reply #74 on:** September 19, 2006, 02:11:57 pm »

its still not playable now, it moves across the screen still but slower

grantspain · « **Reply #75 on:** September 19, 2006, 03:24:28 pm »

get some different value resistors from work(from 100ohm to 47kohm) and experiment,cause thats what learning is all about


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