Help with NSM Prestige ES160

Hello All,

I have the above juke which has suddenly developed a sound problem.

The juke worked fine when I last used it (about 2 weeks ago) and when I went
to play it today, I found that only the right hand speakers are working.

To investigate the problem further, I turned the right hand speakers
completely down and turned up the left hand ones fully. I could only hear
the song playing very faintly. The sound wasn't distorted at all and the
output stage of the amp sounded ok, because I got some hiss when turned up
full.

I'm wondering if there could be a problem in the left hand pre-amp stage.
Has anyone come across this problem?

Many thanks in advance.

On 2007-02-04 00:49:45 -0800, "David" said:

Hello All,

I have the above juke which has suddenly developed a sound problem.

The juke worked fine when I last used it (about 2 weeks ago) and when I went
to play it today, I found that only the right hand speakers are working.

To investigate the problem further, I turned the right hand speakers
completely down and turned up the left hand ones fully. I could only hear
the song playing very faintly. The sound wasn't distorted at all and the
output stage of the amp sounded ok, because I got some hiss when turned up
full.

I'm wondering if there could be a problem in the left hand pre-amp stage.
Has anyone come across this problem?

Many thanks in advance.

You could just have an input issue. The cable that runs under the
carriage was prone to break wires internally - sometimes the audio,
other times other wires. You can do a continuity test from the
cartridge to the DIN plug that feeds the amp.

John :-#)#
--
(Please post followups or tech enquires to the newsgroup) John's
Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 Call
(604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
www.flippers.com "Old pinballers never die, they
just flip out."

"John Robertson" wrote in message
news:2007020414000715668-spam@flipperscom...
On 2007-02-04 00:49:45 -0800, "David" said:

Hello All,

I have the above juke which has suddenly developed a sound problem.

The juke worked fine when I last used it (about 2 weeks ago) and when I
went
to play it today, I found that only the right hand speakers are working.

To investigate the problem further, I turned the right hand speakers
completely down and turned up the left hand ones fully. I could only
hear
the song playing very faintly. The sound wasn't distorted at all and the
output stage of the amp sounded ok, because I got some hiss when turned
up
full.

I'm wondering if there could be a problem in the left hand pre-amp stage.
Has anyone come across this problem?

Many thanks in advance.

You could just have an input issue. The cable that runs under the carriage
was prone to break wires internally - sometimes the audio, other times
other wires. You can do a continuity test from the cartridge to the DIN
plug that feeds the amp.

John :-#)#
--
(Please post followups or tech enquires to the newsgroup) John's Jukes
Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 Call (604)872-5757
or Fax 872-2010 (Pinballs, Jukes, Video Games) www.flippers.com
"Old pinballers never die, they just flip out."

Hello John,

Many thanks for your reply.

I have done a contunity test and the din plug checks out fine. The last
time the juke was working fine, it was playing for about an hour at fairly
high volume.

As part of my testing tonight, I swapped the left and right pre-amp models
over but I still had the same problem in the left channel very low sound
with no bass at all and a slight earth noise in the background. When I
switch the amp to mono, I get sound in both speakers.

All fuses in the amp appear intact. What should my next move be?

Many thanks in advance.

On 2007-02-05 01:38:29 -0800, "David" said:


"John Robertson" wrote in message
news:2007020414000715668-spam@flipperscom...
On 2007-02-04 00:49:45 -0800, "David" said:

Hello All,

I have the above juke which has suddenly developed a sound problem.

The juke worked fine when I last used it (about 2 weeks ago) and when I went
to play it today, I found that only the right hand speakers are working.

To investigate the problem further, I turned the right hand speakers
completely down and turned up the left hand ones fully. I could only hear
the song playing very faintly. The sound wasn't distorted at all and the
output stage of the amp sounded ok, because I got some hiss when turned up
full.

I'm wondering if there could be a problem in the left hand pre-amp stage.
Has anyone come across this problem?

Many thanks in advance.

You could just have an input issue. The cable that runs under the
carriage was prone to break wires internally - sometimes the audio,
other times other wires. You can do a continuity test from the
cartridge to the DIN plug that feeds the amp.

John :-#)#
--
(Please post followups or tech enquires to the newsgroup) John's Jukes
Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 Call
(604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
www.flippers.com "Old pinballers never die, they just flip out."

Hello John,

Many thanks for your reply.

I have done a contunity test and the din plug checks out fine. The
last time the juke was working fine, it was playing for about an hour
at fairly high volume.

As part of my testing tonight, I swapped the left and right pre-amp
models over but I still had the same problem in the left channel very
low sound with no bass at all and a slight earth noise in the
background. When I switch the amp to mono, I get sound in both
speakers.

All fuses in the amp appear intact. What should my next move be?

Many thanks in advance.

Not having a schematic handy is a pain. I don't know if the stereo/mono
switch is at the speakers (outputs of power amplifiers) or inputs to
the power amplifier. If it is at the speakers, then I expect a power
amp has failed, if at the input to the power amp, then I would be
looking for a connection issue.

John :-#)#
--
(Please post followups or tech enquires to the newsgroup) John's
Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 Call
(604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
www.flippers.com "Old pinballers never die, they
just flip out."