ROWE AMI R-93 POWER SUPPLY PROBLEMS

[hammyysu]

HELLO I JUST GOT A ROWE AMI R-93 AND ALL THE LIGHTS BUT THE +8VDC IS ON COULD THE POWER SUPPLY BE BAD?

[hammyysu]

AND CAN IT BE FIXED OR SHOULD I BUY ANOTHER ONE? USED OR NEW.. REMEMBER IT WAS FREE SO THE LESS MONEY I SPEND THE BETTER!!

[ami-man]

Hello hammyysu,

You do not list in your profile what country you live in, this is a world wide forum and as such it helps if we know where to direct you for spares or more local advice.

If you were in Europe I would say for you to contact us in the UK.

Are you saying that the 8 volt led on the power supply is not lit?

Regards
Alan

Alan Hood
ami-man
UK

[jdemarti]

First thing to do is check for a blown fuse in the power supply.  I am not familiar with the R 93 power supplies; but I'm thinking that the fuses are on the top side of the power supply's circuit board. At least that's the way it is in the cd100s.  You will have to undo the screws holding the power supply's circuit board in place and lift it out.

Good luck

[hammyysu]

i live in the usa and i checked all the fuses and they are good i was checking it out today and i have a bad resister the reason i can tell is that it is cracked and broke when i touched it... is it easy to fix? and i don't know if that is the problem still

[hammyysu]

 

[hammyysu]

http://www.ebay.com/itm/AMI-Rowe-R92-main-power-supply/261267548784?_trksid=p4069.m2059&_trkparms=aid%3D111000%26algo%3DREC.CURRENT%26ao%3D1%26asc%3D27%26meid%3D779223945805157060%26pid%3D100039%26prg%3D1011%26rk%3D2%26rkt%3D4%26sd%3D300952282885%26

this is what it is..

[jdemarti]

Resistors are cheap. Radio shack carries them. Ebay is also cheap. Change it out and give it a try.  I assume that since it broke you can no longer see the color bands to determine the resistance level. Hopefully you have the service manual for it so you can identify the correct type of resistor. If not, take  a pic of the board and post it.

[hammyysu]

  well the reistor is bad got the +8vdc working but the resistor went POOF! THERE WAS SMOKE..LOL... GUESS I HAVE TO GO TO RADIO SHACK FOR SOME RESISTORS!! i think there is enough i can tell what the resist is

[hammyysu]

here is the jukebox

[hammyysu]

here are more

[jdemarti]

Funny with electronics. It always seems that the circuit board blows in order to protect the fuse. Try changing the resistor. if it blows again, you may need to check for a short in one of the transistors. 

[hammyysu]

Funny with electronics. It always seems that the circuit board blows in order to protect the fuse. Try changing the resistor. if it blows again, you may need to check for a short in one of the transistors. 

i checked that power board and it was a resistor and then i checked the control board and there is one on there to.. so i am going to be doing some soddering her soon..lol

[hammyysu]

so i think i found the problem but it is a little blown up to tell what the resistance is.. i think the color code is GRAY,RED,GOLD,GOLD.. DOES ANYONE KNOW IF THAT IS RIGHT?

[hammyysu]

so i think i found the problem but it is a little blown up to tell what the resistance is.. i think the color code is GRAY,RED,GOLD,GOLD.. DOES ANYONE KNOW IF THAT IS RIGHT?

[jdemarti]

What is the position on the board?  It should have an R value (R7, R8, etc)

[ami-man]

Hello hammyysu,

That resistor sounds as if it is R508 and it is 0.82 ohms 2 watts wire wound.

If that is blowing then you have a major fault on the 8 volt dc  supply, Q505 more than likely needs replacing but the fault could have orginated  in the earlier parts of the circuit sucj as the two zenor diodes or Q502 or Q503.

Regards
Alan

Alan Hood
ami-man
UK

[hammyysu]

Hello hammyysu,

That resistor sounds as if it is R508 and it is 0.82 ohms 2 watts wire wound.

If that is blowing then you have a major fault on the 8 volt dc  supply, Q505 more than likely needs replacing but the fault could have orginated  in the earlier parts of the circuit sucj as the two zenor diodes or Q502 or Q503.

Regards
Alan

Alan Hood
ami-man
UK

i ordered a new power supply for it.. it is that position and i can not find that resistor anywhere?

[hammyysu]

would that resistor effect this board?

[ed12]

what he basicly said to without getting to long winded
is that value resister make's if fusable resister,and that some thing in that 8v line is loading to the extent,that it is burning it them up..as there is more then 1 of them
and he pointed to the requlator circuit,which is very very common fault area
and easy to fix if understand.? u are dealing with a down side load
ie after a main fuse and main diode...

ed

[ami-man]

Hello hammyysu,

I would think that you may be lucky that the power supply has not effected the CCC.

Looking at some of your pictures of the jukebox I wondered why the gripper bow (put the records onto the turntable) is in the position it is in and why the tone arm is not engaged with the tone arm cam as it should be.

Was this a picture after you picked up the jukebox and the mechanism was fully tied down for transportation
or am I mixing your story with another post?

Regards
Alan

Alan Hood
Ami-man
UK

[hammyysu]

Hello hammyysu,

I would think that you may be lucky that the power supply has not effected the CCC.

Looking at some of your pictures of the jukebox I wondered why the gripper bow (put the records onto the turntable) is in the position it is in and why the tone arm is not engaged with the tone arm cam as it should be.

Was this a picture after you picked up the jukebox and the mechanism was fully tied down for transportation
or am I mixing your story with another post?

Regards
Alan

Alan Hood
Ami-man
UK

the jukebox was tied down and secured i was messing with some stuff to try and figure out the wiring and what goes where and what each wire goes to and it's function.. i might of bumped it or something or it was probably like that i don't remember..

[hammyysu]

they said it came with a manual but instead it came with the manual for the MRS. PACMAN STANDUP parts and operating manual.. .. i think it will sell pretty good to someone who needs it it is from JANUARY 1982 AND IT IS FOR GAMES NOS, 595,602,AND 599

[ed12]

r-93 i do not  have a manual for
but what u need to do is chk the down-stream of the first .82 2w resister
so where that line goes chk for a dead short  ie: that line to ground
basic trouble shooting stuff
from there i bet u find a req trans gone and or diodes :zener:
again basic without a manual,just a tad more time

ed

[hammyysu]

WELL BOUGHT ANOTHER POWER SUPPLY OFF EBAY AND FRIED IT SAME RESISTOR BLOWN!    SO IS THERE ANY PLACE YOU GUYS CAN THINK OF THAT MIGHT HAVE THESE RESISTORS? I AM IN THE USA AND I LIVE IN OHIO.. PLUS WHERE CAN I FIND A SERVICE MANUAL DOWLOAD FOR THIS THING? I AM ALMOST READY TO CONVERT IT INTO A MPS JUCK BOX OR A COMPUTER JUKE

[ami-man]

Hello hammyysu,

I think it is time you sent your parts to Bruce Wentworth of AB Leisure for testing/repair.

If the replacement power supply blew the same resistor this would indicate to me that you have a short of some kind on the 8 volt wiring, it could be the service switch,  the mechanism control unit or CCC.

You should have tested the power supply before you put it in the jukebox, to make sure it was ok by measuring the power rails for 28 volts AC, 28 volts DC & 8 volts DC and putting a small load onto these power rails I use a 12 volt lamps very low wattage, a single lamp across the 8v and two in series across the 28v rails.

Regards
Alan

Alan Hood
ami-man
UK

[hammyysu]

ok so i need to find out where i can download a free sevice manual for my juke box

[hammyysu]

question: can i replace the 8ohm with a 10ohm on the power supply? i can not find the 8ohm resistor..

[ed12]

hammyysu
there is a few places to look
my fav is >jukebox list.net<
u sign up for the forms
and then ask your question
they also have a searchable file section,bit of a bugger to get to but it is there
also they are great guys,they live and eat jukes all day
if my link does not work for u
get back to me and i will post a live link for u

ed

[ami-man]

Hello hammyysu,

The resistor is 0.82 Ohms (NOT 8 ohms).

Regards
Alan

Alan Hood
ami-man
UK

[hammyysu]

Hello hammyysu,

The resistor is 0.82 Ohms (NOT 8 ohms).

Regards
Alan

Alan Hood
ami-man
UK

where would i find that?

[hammyysu]

where can i find a .82ohm resistor 2 watt? i tried ebay and can't find one for my jukebox power supply

[hammyysu]

might just convert it over but hate to lose the originality of the 45's.. how would i change it over?

[ed12]

for the record and what u are doing
u can slap in a 1watt 1ohm resister
it just needs to be cermaic style
all it is doing is  acting like is a fuse
i be it a slow 1 but that is basicly why it is there
to portect your power trans
from the exact same down stream porblem u are haveing

ed

[hammyysu]

  i will go get one and try it..

[hammyysu]

so i was thinking about selling my juke. it wont fit down my stairs to the basement 

[ed12]

banish the thought
get it out of your head
call it a bad dream u had >selling<
trust me if there is a will there is a way

ed

[hammyysu]

i wish i could get it out of my head but the wife says if it don't fit it must go... i am willing to trade for it..

[ed12]

a sad day for u to be sure
my wife told me there was no dam way i could have pinball in my living room....
that was that...
1 day on the road i had to bring 1 home..keep it warm over night..honest
the next day i went to load it back up to go to the shop...she went wo tiger
where do u think u are going with that.?..i said to her u said u did not want it.?
ever since then i have had  a pin in the living room...20+ years

ed

[hammyysu]

i would love another pinball but i just need to move on and maybe get a smaller one.. so if anyone out there has a smaller one they are willing to trade i would love to do so..