MM - Urgent help required!!

[markc]

if you cant get anyone out , we could look at it BUT it would need to be brought to us , we are not taking anymore work on and there is no chance we could come out
but if here I can see if one of he guys can fix it for you inbetween jobs
maybe Try Owen but from talking to him he is pretty well flat out.

sorry thats the best i can offer to help at this time of year

mark

[The pinballist formally known as Dean Morgan]

What LEDs are on, on the CPU?

[Mr Tilt]

Thanks Mark for the offer

All led's are on except 104

[The pinballist formally known as Dean Morgan]

Thanks Mark for the offer

All led's are on except 104

Are you checking the leds on the CPU also?  Or just the leds on the power/driver board?  Led 104 is on the power driver board.  The CPU is the board to the left of this...

See below from Pin Repair Guide....

WPC-S and prior uses a "Dx" designation for its CPU LEDs. WPC-95 uses a "LED20x" designation.

D19/LED201 (blanking): at power-on should be ON for about 3 seconds (1 second on WPC-95), and then turn off and stay off. When D19/LED201 is on, the blanking circuit is disabled (and will not allow any coils to be energized).
D20/LED203 (diagnostic): After D19/LED201 turns off, D20/LED203 should stay flashing permanently while the game is turned on. This indicates the CPU is "running".
D21/LED202 (+5vdc): this LED should ALWAYS be on. It indicates the CPU has +5 volts DC power.
Problem Power-On CPU D20/LED203 (diagnostic) Flash Codes. If D20 does not flash continually, here are the flash codes diagnostics:
blinks ONE time: U6/G11 CPU game ROM bad
blinks TWO times: U8 CMOS RAM chip bad
blinks THREE times: U9 WPC custom chip bad (pre WPC-S), or G10 Security PIC chip bad (WPC-S and later)

[shansta]

C'mon Daniel - get over there! I feel another caption competition coming on... 

[Mr Tilt]

swapped power board from Totan and still same problem

No DMD and playfield only backbox lights up and 1 beep

Any ideas?

[The pinballist formally known as Dean Morgan]

Have u checked the Leds on the CPU board as per my previous post?

[markc]

had to hire out my MM today      had nothing left

[Mr Tilt]

ok
201 is on
202 is on
203 is off
501 flashing
100-105 on

[The pinballist formally known as Dean Morgan]

ok
201 is on
202 is on
203 is off
501 flashing
100-105 on

Ok this means your CPU is NOT running.  LED 203 should be flashing.  You need to turn the game off then on again when you switch it on watch Led 203 and count how many times it flashes.  Then report back.

[Mr Tilt]

203 was blank, nothing

[The pinballist formally known as Dean Morgan]

203 was blank, nothing

Most likley a bad game rom at U6, but cannot gurantee this is it you will need to replace it to be sure.  Try removing U6 and re-installing, if still no good you may need to replace it.

[The pinballist formally known as Dean Morgan]

You could also try this procedure from the pinrepair website guides:

Dead CPU Step One: Remove the Ribbon Cables.
Before you do anything, turn the game off and remove all the ribbon cables from the CPU. This will issolate the CPU from the driver board, the dot matrix display board, the sound board, the fliptronic board (if your game has one), and any other connecting boards. The ribbon cables are at connectors J201, J202, J211, and J204 (on some games). While you're at it, you might as well remove the switch connectors at J205 to J209, and J212. The only connector still attached is J210 (the power connector).

After everything is removed but connector J210, turn the game on. If the CPU board boots correctly, the lower LED (+5 volts) should be on, the middle LED (diagnostics) should be blinking continually, and the top LED (blanking) should be off. If this is the case, turn the game off and replace the ribbon cables, one at a time, and turn the game back on.

Start with replacing the the driver board to CPU board ribbon cable first. Chances are good the CPU board will still boot with this cable connected. Next try the other ribbon cables. If connecting the other ribbon cables stops the CPU board from booting, chances are good the TTL chips across the top of the CPU board are the problem (U1,U2,U3 on all WPC revisions).

[Pinball Fixers]

Did you get this machine up and running?

I only just saw the posts in my section regarding repairs, but I thought I'd check on the status first...