Service manual or schematics
Hey,
I got this old Pioneer GM-120 amp from my friend. If you have schematics or servicemanual for this one, could someone email it to me?
my addy is miikkakallberg@hotmail.com
Thanx
Hey,
I got this old Pioneer GM-120 amp from my friend. If you have schematics or servicemanual for this one, could someone email it to me?
my addy is miikkakallberg@hotmail.com
Thanx
http://www.bcot1.com/gm120/
this site came from perry babbin
it should be posted there.
gaarder, this amp is connected to a headunit
with din jack type compatible.
like KEX-70, KPX,9000, and so on.
it could also be connected to an equalizer
like CD-9, and CD-5.
this site came from perry babbin
it should be posted there.
gaarder, this amp is connected to a headunit
with din jack type compatible.
like KEX-70, KPX,9000, and so on.
it could also be connected to an equalizer
like CD-9, and CD-5.
location of the blue wire?
Hi Chris,
I have been reading the posts on the GM-120 and I would like to thank everyone for their input.
I would like to use my old GM-120 with a non component cd player (i'm looking at possibly the new Pioneer DEH-P3900MP) . I have not been able to get the amp to power up without an original Pioneer component. What you have mentioned above sounds like this might be what is causing the issue. I was looking inside of my amp today and I was wondering if you could help me locate where to connect the 1K resistor to GND (I see at least 3 blue wire locations inside)
Sorry for digging up a really old post and any help would be very much appreciated.
Thanks,
Mike
anatech said:
Hi Chris,
I have been reading the posts on the GM-120 and I would like to thank everyone for their input.
I would like to use my old GM-120 with a non component cd player (i'm looking at possibly the new Pioneer DEH-P3900MP) . I have not been able to get the amp to power up without an original Pioneer component. What you have mentioned above sounds like this might be what is causing the issue. I was looking inside of my amp today and I was wondering if you could help me locate where to connect the 1K resistor to GND (I see at least 3 blue wire locations inside)
Sorry for digging up a really old post and any help would be very much appreciated.
Thanks,
Mike
Hi Mike,
Without the original documentation to go by, I don't think I can help you. About 20 years ago (maybe more) I built a breakout box for the GM series amps. I could trigger and run signals to and from headunits and amps. The amp input level is about 20 dB below normal signal levels (go figure - in a car no less!). You will therefore have to attenuate your signals by 20 dB. You need to amplify an old head unit by a similar amount to get useable volume out of them.
A shematic showing the old plug and turn on circuit would tell you how to do this. Watch out because the amp supplied the head unit with power.
-Chris
Without the original documentation to go by, I don't think I can help you. About 20 years ago (maybe more) I built a breakout box for the GM series amps. I could trigger and run signals to and from headunits and amps. The amp input level is about 20 dB below normal signal levels (go figure - in a car no less!). You will therefore have to attenuate your signals by 20 dB. You need to amplify an old head unit by a similar amount to get useable volume out of them.
A shematic showing the old plug and turn on circuit would tell you how to do this. Watch out because the amp supplied the head unit with power.
-Chris
gm-201
hi every one!
I have a similar problem with a pioneer gm-201, I cannot turn it on, can any one help me.
I don't have any wires on the amplifier, but, on the pcb it say, on the big connector acc + backup illum gnd and of course the out puts, and on the 8 small connector mute, in L, in R, swd b+,unswd B+, illum this is the conector that gives me problems.
hi every one!
I have a similar problem with a pioneer gm-201, I cannot turn it on, can any one help me.
I don't have any wires on the amplifier, but, on the pcb it say, on the big connector acc + backup illum gnd and of course the out puts, and on the 8 small connector mute, in L, in R, swd b+,unswd B+, illum this is the conector that gives me problems.
Unfourtunately I don't I found a similar on the net http://www.eserviceinfo.com/index.php?what=search2&searchstring=GM-A200 and the gm 120 wich is previous presented here.
GM-120
hello,
this was from mr. perry babin post.
also i believe i have a copy of this manual,
its just i have to dig in my filing cabinet.
there is a way on how to turn this thing on with a resistor.
its really been a while since the last time i work on
GM-120
http://www.bcot1.com/gm120/
dan
hello,
this was from mr. perry babin post.
also i believe i have a copy of this manual,
its just i have to dig in my filing cabinet.
there is a way on how to turn this thing on with a resistor.
its really been a while since the last time i work on
GM-120
http://www.bcot1.com/gm120/
dan
Another SCH
Hi all
I try to attach another sch of gm 120, it look better, but I can't because is too big (374kb) to upload in this forum, and no accept split archives
if any have a solution tell me, I will try to upload in rapid share
ok it's here
http://rapidshare.com/files/23225761/gm120.rar
Hi all
I try to attach another sch of gm 120, it look better, but I can't because is too big (374kb) to upload in this forum, and no accept split archives
if any have a solution tell me, I will try to upload in rapid share
ok it's here
http://rapidshare.com/files/23225761/gm120.rar