Tech - Wurlitzer OMT 1015-CD problems

[jbenz]

Hi all,
My father in law recently picked up a really nice one owner/home us
OMT1015CD. The production date is 1999 with a serial in the 3909XXX
range and it uses a amp labeled "Compact Amplifier 40 210".
Unfortunately it currently has a fair share of issues.

- The only LED Display output is a flashing "8". I checked the k
actuator and found it had already been replaced with a hose clamp.
adjusted the tail of the clamp to open k7 when the gripper is in th
home position and the CD clamp is fully opened. This allowed th
carousel to spin but the display still flashes "8" and the gripper jus
keeps randomly grabbing CDs and putting them back without playing.

- I then turned my attention to the CD unit. From looking at th
pictures on flippers.com it's either a CDM12 or CD-PRO unit. The dis
spindle never spins up and the laser never seeks/hunts or powers up bu
the LED on the controller board flashes "0" "1" "8" in a loop. If yo
press button 1 it will scroll through the different modes 0-5 bu
pressing the other two buttons does nothing.

Any ideas from the pro's where I should start? If the cd drive is ba
will that cause the constant swapping of disks?

Thanks for any and all help,



--
jbenz

[John Robertson]

Post by jbenz
Hi all,
My father in law recently picked up a really nice one owner/home use
OMT1015CD. The production date is 1999 with a serial in the 3909XXXX
range and it uses a amp labeled "Compact Amplifier 40 210".
Unfortunately it currently has a fair share of issues.
- The only LED Display output is a flashing "8". I checked the k7
actuator and found it had already been replaced with a hose clamp. I
adjusted the tail of the clamp to open k7 when the gripper is in the
home position and the CD clamp is fully opened. This allowed the
carousel to spin but the display still flashes "8" and the gripper just
keeps randomly grabbing CDs and putting them back without playing.

Is the machine is Self Test or Run mode? The SERVICE switch on the SC&C
(Selection and Credit Computer) should be off to Run mode.

Are the Z and K LEDs blinking when the carousel rotates? Read about that
on my page...#2-1.

Have you followed the troubleshooting guide posted there?

Post by jbenz
- I then turned my attention to the CD unit. From looking at the
pictures on flippers.com it's either a CDM12 or CD-PRO unit. The disk
spindle never spins up and the laser never seeks/hunts or powers up but
the LED on the controller board flashes "0" "1" "8" in a loop. If you
press button 1 it will scroll through the different modes 0-5 but
pressing the other two buttons does nothing.

If it is a CD player failure the CD would be placed on the player and
the machine would wait ten to twenty seconds - then return the CD to the
basket if it couldn't access the player. If it puts it back immediatly
then something else is wrong.

Post by jbenz
Any ideas from the pro's where I should start? If the cd drive is bad
will that cause the constant swapping of disks?
Thanks for any and all help,
J

Very busy right now, but I will pop in every day or so with more
suggestions if you report back your findings. Please do not edit the
thread other than removing useless text, I don't want to have to go back
through various messages to find the story here. Quote and answer like I
just did is best for clarity or process...

John :-#)#

[jbenz]

Post by John Robertson
Is the machine is Self Test or Run mode? The SERVICE switch on the SC&
(Selection and Credit Computer) should be off to Run mode.
Hi John,
Thanks for the great resource that is flippers.com and taking the tim
to respond.
-Verified SC&C is in Run mode. I can enter service mode and run some o
the tests successfully although tests that apply to the CD (keys 7,6,an
9) produce no results.
Also while in service mode the gripper keeps grabbing random CDs fro
the carousel, placing on the player then returning them after 4 or
seconds.
Are the Z and K LEDs blinking when the carousel rotates? Read about tha
on my page...#2-1.
-Z flashes steadily as the carousel rotates while K flashes every onc
and a while.
Have you followed the troubleshooting guide posted there?
-I'm still working through all of the troubleshooting that even remotel
resembles the issues I'm having. I'm heading back over to the in-law
again Wed night to dive back in.
If it is a CD player failure the CD would be placed on the player and
the machine would wait ten to twenty seconds - then return the CD to th
basket if it couldn't access the player. If it puts it back immediatly
then something else is wrong.
- I timed the delay between placing the cd on the player and returnin
it to the carousel and it came in between 4 and 5 seconds so a far cr
from 20 seconds.
Thank you again for your help especially knowing that you are swampe
right now.
Jay

--
jbenz

[John Robertson]

Post by John Robertson
Is the machine is Self Test or Run mode? The SERVICE switch on the SC&C
(Selection and Credit Computer) should be off to Run mode.
Hi John,
Thanks for the great resource that is flippers.com and taking the time
to respond.
-Verified SC&C is in Run mode. I can enter service mode and run some of
the tests successfully although tests that apply to the CD (keys 7,6,and
9) produce no results.
Also while in service mode the gripper keeps grabbing random CDs from
the carousel, placing on the player then returning them after 4 or 5
seconds.
Are the Z and K LEDs blinking when the carousel rotates? Read about that
on my page...#2-1.
-Z flashes steadily as the carousel rotates while K flashes every once
and a while.
Have you followed the troubleshooting guide posted there?
-I'm still working through all of the troubleshooting that even remotely
resembles the issues I'm having. I'm heading back over to the in-laws
again Wed night to dive back in.
If it is a CD player failure the CD would be placed on the player and
the machine would wait ten to twenty seconds - then return the CD to the
basket if it couldn't access the player. If it puts it back immediatly
then something else is wrong.
- I timed the delay between placing the cd on the player and returning
it to the carousel and it came in between 4 and 5 seconds so a far cry
from 20 seconds.
Thank you again for your help especially knowing that you are swamped
right now.
Jay

One thing to try is unplug the battery jumper and leave the machine off
overnight. This will flush the memory and will sometimes cure weird
problems. Plug the battery jumper back in after you have turned the
machine back on...

John :-#)#

[jbenz]

Post by John Robertson
One thing to try is unplug the battery jumper and leave the machine off
overnight. This will flush the memory and will sometimes cure weird
problems. Plug the battery jumper back in after you have turned the
machine back on..
John :-#)

Thanks John,
I'll report back tonight with results of draining the power and th
additional troubleshooting


--
jbenz

[jbenz]

On 10/17/2016 8:56 PM, jbenz wrote:-
John Robertson;698141 Wrote:-
Is the machine is Self Test or Run mode? The SERVICE switch on th
SC&C
(Selection and Credit Computer) should be off to Run mode.
Hi John,
Thanks for the great resource that is flippers.com and taking the time
to respond.
-Verified SC&C is in Run mode. I can enter service mode and run som
of
the tests successfully although tests that apply to the CD (key
7,6,and
9) produce no results.
Also while in service mode the gripper keeps grabbing random CDs from
the carousel, placing on the player then returning them after 4 or 5
seconds.
Are the Z and K LEDs blinking when the carousel rotates? Read abou
that
on my page...#2-1.
-Z flashes steadily as the carousel rotates while K flashes every once
and a while.
Have you followed the troubleshooting guide posted there?
-I'm still working through all of the troubleshooting that eve
remotely
resembles the issues I'm having. I'm heading back over to the in-laws
again Wed night to dive back in.
If it is a CD player failure the CD would be placed on the player and
the machine would wait ten to twenty seconds - then return the CD t
the
basket if it couldn't access the player. If it puts it back immediatly
then something else is wrong.
- I timed the delay between placing the cd on the player and returning
it to the carousel and it came in between 4 and 5 seconds so a far cry
from 20 seconds.
Thank you again for your help especially knowing that you are swamped
right now.
Jay
-
-
One thing to try is unplug the battery jumper and leave the machine of
overnight. This will flush the memory and will sometimes cure weird
problems. Plug the battery jumper back in after you have turned the
machine back on...
John :-#)#
--
(Please post followups or tech inquiries to the USENET newsgroup)
John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
[phone] or Fax [phone] (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."

I just got back from round two with the OMT. I pulled the batt jumpe
yesterday so it's been unplugged for the better part of a day. Powere
up the machine and plugged the jumper back in with no change i
symptoms.

The juke still flashes 8 on display, cd drive still flashes 0-1-8
gripper arm still grabs about every 10th cd, places on the player the
picks it up, returns it then the carousel spins ahead another couple o
disks then repeats the whole cycle.

I followed the troubleshooting in Chapter V, symptom 2 for permanen
gripper arm movement. Troubleshooting suggests if the gripper ar
movement stops after pulling BLUE (ours stops when blue is pulled) the
the SC&C is running out of program and suggests computer is defective.
I also checked pin 4 on the BLUE plug when k6 is open and only go
-.412v insead of -30v the manual specified.

I checked voltages at the following fuse locations on the 40210 amp jus
for GP.

Si6 + 28.9v
Si4 + 33.9v
Si5 + 10.5v
Si3 - 34.2v
Si2 Zero
Si1 Zero

And here are some pictures of the 40210 amp and the CDM41/CDM12 SC&
just in case someone can see a glaring error in the wiring.

http://imgur.com/a/JVQSb

Thanks again John,
Ja


--
jbenz

[John Robertson]

On 10/17/2016 8:56 PM, jbenz wrote:-
John Robertson;698141 Wrote:-
Is the machine is Self Test or Run mode? The SERVICE switch on the SC&C
(Selection and Credit Computer) should be off to Run mode.
Hi John,
Thanks for the great resource that is flippers.com and taking the time
to respond.
-Verified SC&C is in Run mode. I can enter service mode and run some of
the tests successfully although tests that apply to the CD (keys 7,6,and
9) produce no results.
Also while in service mode the gripper keeps grabbing random CDs from
the carousel, placing on the player then returning them after 4 or 5
seconds.
Are the Z and K LEDs blinking when the carousel rotates? Read about that
on my page...#2-1.
-Z flashes steadily as the carousel rotates while K flashes every once
and a while.
Have you followed the troubleshooting guide posted there?
-I'm still working through all of the troubleshooting that even remotely
resembles the issues I'm having. I'm heading back over to the in-laws
again Wed night to dive back in.
If it is a CD player failure the CD would be placed on the player and
the machine would wait ten to twenty seconds - then return the CD to the
basket if it couldn't access the player. If it puts it back immediatly
then something else is wrong.
- I timed the delay between placing the cd on the player and returning
it to the carousel and it came in between 4 and 5 seconds so a far cry
from 20 seconds.
Thank you again for your help especially knowing that you are swamped
right now.
Jay
-
-
One thing to try is unplug the battery jumper and leave the machine off
overnight. This will flush the memory and will sometimes cure weird
problems. Plug the battery jumper back in after you have turned the
machine back on...
John :-#)#
--
(Please post followups or tech inquiries to the USENET newsgroup)
John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
[phone] or Fax [phone] (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."

I just got back from round two with the OMT. I pulled the batt jumper
yesterday so it's been unplugged for the better part of a day. Powered
up the machine and plugged the jumper back in with no change in
symptoms.
The juke still flashes 8 on display, cd drive still flashes 0-1-8,
gripper arm still grabs about every 10th cd, places on the player then
picks it up, returns it then the carousel spins ahead another couple of
disks then repeats the whole cycle.
I followed the troubleshooting in Chapter V, symptom 2 for permanent
gripper arm movement. Troubleshooting suggests if the gripper arm
movement stops after pulling BLUE (ours stops when blue is pulled) then
the SC&C is running out of program and suggests computer is defective.
I also checked pin 4 on the BLUE plug when k6 is open and only got
-.412v insead of -30v the manual specified.
I checked voltages at the following fuse locations on the 40210 amp just
for GP.
Si6 + 28.9v
Si4 + 33.9v
Si5 + 10.5v
Si3 - 34.2v
Si2 Zero
Si1 Zero
And here are some pictures of the 40210 amp and the CDM41/CDM12 SC&C
just in case someone can see a glaring error in the wiring.
http://imgur.com/a/JVQSb
Thanks again John,
Jay

Can't help for a few days. Will review this over this weekend and see
what further steps I can advise...

A quick thought is to check that the microswitches all show zeroish
resistance when closed (power off, computer unplugged) and infinite when
open on the off chance that either the K7 or safety micro switch are
defective.

John :-#)#

[jbenz]

John Robertson;698144 Wrote:-
-
Can't help for a few days. Will review this over this weekend and see
what further steps I can advise...
A quick thought is to check that the microswitches all show zeroish
resistance when closed (power off, computer unplugged) and infinite whe
open on the off chance that either the K7 or safety micro switch are
defective.
John :-#)#
--
(Please post followups or tech inquiries to the USENET newsgroup)
John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
[phone] or Fax [phone] (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."

Hi John,
I tested the three micro-switches up top and all tested good.

Ja


--
jbenz

[Greg Lentz]

Post by John Robertson

John Robertson;698144 Wrote:-
-
Can't help for a few days. Will review this over this weekend and see
what further steps I can advise...
A quick thought is to check that the microswitches all show zeroish
resistance when closed (power off, computer unplugged) and infinite when
open on the off chance that either the K7 or safety micro switch are
defective.
John :-#)#
--
(Please post followups or tech inquiries to the USENET newsgroup)
John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
[phone] or Fax [phone] (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."

Hi John,
I tested the three micro-switches up top and all tested good.
Jay

Jay,

Have you obtained the Field service manuals? Check flippers.com. Any
manual that has the CDM12 or CD-pro should be appropriate. Has a decent
troubleshooting section. You will also find sections to check player
operation, gripper arm, cd carrier etc. The player can be checked by
itself using the player control buttons. The other functions must be
done by putting the S&CC into service mode and then pressing the LT
button to reboot the S&CC. The flashing 8 + your other symptoms may be a
bad transistor (T4) in the S&CC. Could also be a bad solenoid(Relay) in
the S&CC (relay 4). The very short time the CD is on the player would
generally mean the S&CC is skipping the step to tell the CD Player to
play the CD. This can happen if one of the microswitches K1, K6, K7 etc
are not working right, especially K1 in this case, or if one of the big
relays with the transparent covers on the S&CC are not working. The
relay not working correctly is usually the result of a bad transistor
that controls it. It sounds like this is happening even though there are
no credits available to play. So it could be something related to the
credit circuits. Is this doing this right away? When first turned on the
carrier should rotate to home itself. You should have an early model CD
Pro unless it's been replaced by a newer CD-Pro. OMT's were switched to
CD Pro's ~April/May 1998.

Have you taken the cover off the computer? If not you should, to make
sure the small back-up battery hasn't leaked.

The missing -30V is important but I don't remember if -30v should be
present at all times or only when going into play mode.

One simple thing to check is the Cancel button on the "remote" volume
control (on the back of the jukebox). Maybe it is stuck closed. I think
you can unplug the control from the amplifier without affecting basic
functionality (power off first).

Greg

[Greg Lentz]

Post by John Robertson

John Robertson;698144 Wrote:-
-
Can't help for a few days. Will review this over this weekend and see
what further steps I can advise...
A quick thought is to check that the microswitches all show zeroish
resistance when closed (power off, computer unplugged) and infinite when
open on the off chance that either the K7 or safety micro switch are
defective.
John :-#)#
--
(Please post followups or tech inquiries to the USENET newsgroup)
John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
[phone] or Fax [phone] (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."

Hi John,
I tested the three micro-switches up top and all tested good.
Jay

Jay,

Have you obtained the Field service manuals? Check flippers.com. Any
manual that has the CDM12 or CD-pro should be appropriate. Has a decent
troubleshooting section. You will also find sections to check player
operation, gripper arm, cd carrier etc. The player can be checked by
itself using the player control buttons. The other functions must be
done by putting the S&CC into service mode and then pressing the LT
button to reboot the S&CC. The flashing 8 + your other symptoms may be a
bad transistor (T4) in the S&CC. Could also be a bad solenoid(Relay) in
the S&CC (relay 4). The very short time the CD is on the player would
generally mean the S&CC is skipping the step to tell the CD Player to
play the CD. This can happen if one of the microswitches K1, K6, K7 etc
are not working right, especially K1 in this case, or if one of the big
relays with the transparent covers on the S&CC are not working. The
relay not working correctly is usually the result of a bad transistor
that controls it. It sounds like this is happening even though there are
no credits available to play. So it could be something related to the
credit circuits. Is this doing this right away? When first turned on the
carrier should rotate to home itself. You should have an early model CD
Pro unless it's been replaced by a newer CD-Pro. OMT's were switched to
CD Pro's ~April/May 1998.

Have you taken the cover off the computer? If not you should, to make
sure the small back-up battery hasn't leaked.

The missing -30V is important but I don't remember if -30v should be
present at all times or only when going into play mode.

One simple thing to check is the Cancel button on the "remote" volume
control (on the back of the jukebox). Maybe it is stuck closed. I think
you can unplug the control from the amplifier without affecting basic
functionality (power off first).

Greg

Follow up after seeing your posted pictures. I see Wurlitzer updated the 4
S&CC relays. My transparent relays have been replace by the large orange/red
relay devices along the lower left bottom of the circuit board. I don't have
my schematic with me but it's likely the transistors immediately above those
orange/red relays are controlling the relays. If one of those goes bad it
might be the cause of your problem. If those "relays" are solid state I'm
not sure how to check the relays themselves. If they are still mechanical
you should be able to hear or feel them clicking. If the "K" led is flashing
only intermittently, not continuously lit or not flashing fairly rapidly and
regularly then their that is trying to tell you something. I don't remember
exactly but it could be the "K" led is only supposed to flash when the
carousel is rotating.

Greg

[Greg Lentz]

Jay,

tried to send this shortly after my other post but it wouldn't send.

Follow up after seeing your posted pictures. I see Wurlitzer updated the 4
S&CC relays. My transparent relays have been replace by the large orange/red
relay devices along the lower left bottom of the circuit board. I don't have
my schematic with me but it's likely the transistors immediately above those
orange/red relays are controlling the relays. If one of those goes bad it
might be the cause of your problem. If those "relays" are solid state I'm
not sure how to check the relays themselves. If they are still mechanical
you should be able to hear or feel them clicking. If the "K" led is flashing
only intermittently, not continuously lit or not flashing fairly rapidly and
regularly then their that is trying to tell you something. I don't remember
exactly but it could be the "K" led is only supposed to flash when the
carousel is rotating.

Greg

Post by John Robertson

John Robertson;698144 Wrote:-
-
Can't help for a few days. Will review this over this weekend and see
what further steps I can advise...
A quick thought is to check that the microswitches all show zeroish
resistance when closed (power off, computer unplugged) and infinite when
open on the off chance that either the K7 or safety micro switch are
defective.
John :-#)#
--
(Please post followups or tech inquiries to the USENET newsgroup)
John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
[phone] or Fax [phone] (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."

Hi John,
I tested the three micro-switches up top and all tested good.
Jay

Jay,

Have you obtained the Field service manuals? Check flippers.com. Any
manual that has the CDM12 or CD-pro should be appropriate. Has a decent
troubleshooting section. You will also find sections to check player
operation, gripper arm, cd carrier etc. The player can be checked by
itself using the player control buttons. The other functions must be
done by putting the S&CC into service mode and then pressing the LT
button to reboot the S&CC. The flashing 8 + your other symptoms may be a
bad transistor (T4) in the S&CC. Could also be a bad solenoid(Relay) in
the S&CC (relay 4). The very short time the CD is on the player would
generally mean the S&CC is skipping the step to tell the CD Player to
play the CD. This can happen if one of the microswitches K1, K6, K7 etc
are not working right, especially K1 in this case, or if one of the big
relays with the transparent covers on the S&CC are not working. The
relay not working correctly is usually the result of a bad transistor
that controls it. It sounds like this is happening even though there are
no credits available to play. So it could be something related to the
credit circuits. Is this doing this right away? When first turned on the
carrier should rotate to home itself. You should have an early model CD
Pro unless it's been replaced by a newer CD-Pro. OMT's were switched to
CD Pro's ~April/May 1998.

Have you taken the cover off the computer? If not you should, to make
sure the small back-up battery hasn't leaked.

The missing -30V is important but I don't remember if -30v should be
present at all times or only when going into play mode.

One simple thing to check is the Cancel button on the "remote" volume
control (on the back of the jukebox). Maybe it is stuck closed. I think
you can unplug the control from the amplifier without affecting basic
functionality (power off first).

Greg

[Greg Lentz]

Jay,

tried to send this shortly after my other post but it wouldn't send.

Follow up after seeing your posted pictures. I see Wurlitzer updated the 4
S&CC relays. My transparent relays have been replace by the large orange/red
relay devices along the lower left bottom of the circuit board. I don't have
my schematic with me but it's likely the transistors immediately above those
orange/red relays are controlling the relays. If one of those goes bad it
might be the cause of your problem. If those "relays" are solid state I'm
not sure how to check the relays themselves. If they are still mechanical
you should be able to hear or feel them clicking. If the "K" led is flashing
only intermittently, not continuously lit or not flashing fairly rapidly and
regularly then their that is trying to tell you something. I don't remember
exactly but it could be the "K" led is only supposed to flash when the
carousel is rotating.

Greg

Post by John Robertson

John Robertson;698144 Wrote:-
-
Can't help for a few days. Will review this over this weekend and see
what further steps I can advise...
A quick thought is to check that the microswitches all show zeroish
resistance when closed (power off, computer unplugged) and infinite when
open on the off chance that either the K7 or safety micro switch are
defective.
John :-#)#
--
(Please post followups or tech inquiries to the USENET newsgroup)
John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
[phone] or Fax [phone] (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."

Hi John,
I tested the three micro-switches up top and all tested good.
Jay

Jay,

Have you obtained the Field service manuals? Check flippers.com. Any
manual that has the CDM12 or CD-pro should be appropriate. Has a decent
troubleshooting section. You will also find sections to check player
operation, gripper arm, cd carrier etc. The player can be checked by
itself using the player control buttons. The other functions must be
done by putting the S&CC into service mode and then pressing the LT
button to reboot the S&CC. The flashing 8 + your other symptoms may be a
bad transistor (T4) in the S&CC. Could also be a bad solenoid(Relay) in
the S&CC (relay 4). The very short time the CD is on the player would
generally mean the S&CC is skipping the step to tell the CD Player to
play the CD. This can happen if one of the microswitches K1, K6, K7 etc
are not working right, especially K1 in this case, or if one of the big
relays with the transparent covers on the S&CC are not working. The
relay not working correctly is usually the result of a bad transistor
that controls it. It sounds like this is happening even though there are
no credits available to play. So it could be something related to the
credit circuits. Is this doing this right away? When first turned on the
carrier should rotate to home itself. You should have an early model CD
Pro unless it's been replaced by a newer CD-Pro. OMT's were switched to
CD Pro's ~April/May 1998.

Have you taken the cover off the computer? If not you should, to make
sure the small back-up battery hasn't leaked.

The missing -30V is important but I don't remember if -30v should be
present at all times or only when going into play mode.

One simple thing to check is the Cancel button on the "remote" volume
control (on the back of the jukebox). Maybe it is stuck closed. I think
you can unplug the control from the amplifier without affecting basic
functionality (power off first).

Greg

[Claudia Amezquita]

Post by Greg Lentz
Jay,
tried to send this shortly after my other post but it wouldn't send.
Follow up after seeing your posted pictures. I see Wurlitzer updated the 4
S&CC relays. My transparent relays have been replace by the large orange/red
relay devices along the lower left bottom of the circuit board. I don't have
my schematic with me but it's likely the transistors immediately above those
orange/red relays are controlling the relays. If one of those goes bad it
might be the cause of your problem. If those "relays" are solid state I'm
not sure how to check the relays themselves. If they are still mechanical
you should be able to hear or feel them clicking. If the "K" led is flashing
only intermittently, not continuously lit or not flashing fairly rapidly and
regularly then their that is trying to tell you something. I don't remember
exactly but it could be the "K" led is only supposed to flash when the
carousel is rotating.
Greg

Post by John Robertson

John Robertson;698144 Wrote:-
-
Can't help for a few days. Will review this over this weekend and see
what further steps I can advise...
A quick thought is to check that the microswitches all show zeroish
resistance when closed (power off, computer unplugged) and infinite when
open on the off chance that either the K7 or safety micro switch are
defective.
John :-#)#
--
(Please post followups or tech inquiries to the USENET newsgroup)
John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
[phone] or Fax [phone] (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."

Hi John,
I tested the three micro-switches up top and all tested good.
Jay

Jay,
Have you obtained the Field service manuals? Check flippers.com. Any
manual that has the CDM12 or CD-pro should be appropriate. Has a decent
troubleshooting section. You will also find sections to check player
operation, gripper arm, cd carrier etc. The player can be checked by
itself using the player control buttons. The other functions must be
done by putting the S&CC into service mode and then pressing the LT
button to reboot the S&CC. The flashing 8 + your other symptoms may be a
bad transistor (T4) in the S&CC. Could also be a bad solenoid(Relay) in
the S&CC (relay 4). The very short time the CD is on the player would
generally mean the S&CC is skipping the step to tell the CD Player to
play the CD. This can happen if one of the microswitches K1, K6, K7 etc
are not working right, especially K1 in this case, or if one of the big
relays with the transparent covers on the S&CC are not working. The
relay not working correctly is usually the result of a bad transistor
that controls it. It sounds like this is happening even though there are
no credits available to play. So it could be something related to the
credit circuits. Is this doing this right away? When first turned on the
carrier should rotate to home itself. You should have an early model CD
Pro unless it's been replaced by a newer CD-Pro. OMT's were switched to
CD Pro's ~April/May 1998.
Have you taken the cover off the computer? If not you should, to make
sure the small back-up battery hasn't leaked.
The missing -30V is important but I don't remember if -30v should be
present at all times or only when going into play mode.
One simple thing to check is the Cancel button on the "remote" volume
control (on the back of the jukebox). Maybe it is stuck closed. I think
you can unplug the control from the amplifier without affecting basic
functionality (power off first).
Greg

Hello, any news ?. I have the same problem...