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Tech - Wurlitzer OMT 1015-CD problems
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 "Greg Lentz" wrote in message news On 10/24/2016 1:26 AM, jbenz wrote: John Robertson;698151 Wrote: 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 (604)872-5757 or Fax 872-2010 (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 |
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