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#12
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wurlitzer 1015 cd bubbler no sound
BGM & TAPE flash immediately at turn on.
The DIP switches don't affect the display. Display always flashes a 1. Mute LED is on immediately too at turn on. With all inputs except power disconnected to K99,I have same result. I can play CD'S through my stereo but not via the jukebox amp and speakers because of the K99 problem. All components in mute circuit test okay IC, diodes, transistors. Resistors and caps seem okay. |
#13
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wurlitzer 1015 cd bubbler no sound
On 03/03/2016 6:06 PM, wrote:
BGM & TAPE flash immediately at turn on. The DIP switches don't affect the display. Display always flashes a 1. Mute LED is on immediately too at turn on. With all inputs except power disconnected to K99,I have same result. I can play CD'S through my stereo but not via the jukebox amp and speakers because of the K99 problem. All components in mute circuit test okay IC, diodes, transistors. Resistors and caps seem okay. Does sound like a defective K99 amp. First thing to check is if the /Reset signal goes high after the machine is powered up. The schematic shows this signal goes to the PIC located at 41C1 (ST6225) and you want to check pin 11. It should be High for the device to function normally. Let us know the state of the Reset pin... 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." |
#14
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wurlitzer 1015 cd bubbler no sound
Hi John,
I have a high on pin 11 of the 41C1/ST6225. The scheme shows pin 11 going to pin 5 of 41C2. A reset option that I don't see on my K99. My pin 8 on the output amps is 4.3 vdc. I believe a 0 vdc or open is mute on. So 4.3 vdc shouldn't be muting the amps 2LIC1 and 2RIC1 I have 0vdc on the internal speaker outputs at 2P12. The MV coming from 3IC1 is 5 vdc at pin 12 but .7 vdc going into the mute circuit. I have 0vdc on pin 9/mute out of the NAND in the mute circuit. It shows that coming from 51C6, scheme 5. Could 3IC1 be a problem? Is that chip available? Thanks. Glenn |
#15
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wurlitzer 1015 cd bubbler no sound
On 03/04/2016 6:47 AM, wrote:
Hi John, I have a high on pin 11 of the 41C1/ST6225. The scheme shows pin 11 going to pin 5 of 41C2. A reset option that I don't see on my K99. My pin 8 on the output amps is 4.3 vdc. I believe a 0 vdc or open is mute on. So 4.3 vdc shouldn't be muting the amps 2LIC1 and 2RIC1 I have 0vdc on the internal speaker outputs at 2P12. The MV coming from 3IC1 is 5 vdc at pin 12 but .7 vdc going into the mute circuit. I have 0vdc on pin 9/mute out of the NAND in the mute circuit. It shows that coming from 51C6, scheme 5. Could 3IC1 be a problem? Is that chip available? Thanks. Glenn 31C1 can't lock up the computer, it is audio only. If the display only shows a "1" then something else is wrong, and I suspect the CPU at this point. You may have to send this off to Rod Stapledon for repair... 1 (800) 458-5326 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." |
#16
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wurlitzer 1015 cd bubbler no sound
Is the CPU the 4CIC1/ST6225?
Are those chips available? |
#17
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wurlitzer 1015 cd bubbler no sound
On 03/04/2016 8:42 AM, wrote:
Is the CPU the 4CIC1/ST6225? Are those chips available? I have no stock on them, but will check with Germany. I am not certain that this is the problem though. I suggest you call Rod, he knows a lot more about those amplifiers and probably has that part in his stock. John :-#)# PS, tell him I said "Hi!" -- (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." |
#18
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wurlitzer 1015 cd bubbler no sound
Okay. Thanks John.
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