Adding an Aux input to the GL1500 radio


Step-by-step tutorials on how to maintain and fix your GL1500
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WingAdmin
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Posts: 19686
Joined: Fri Oct 03, 2008 4:16 pm
Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (wife's!)
1998 XV250 Virago (sold)
2007 Aspen Sentry Trailer

Re: Adding an Aux input to the GL1500 radio

Post by WingAdmin » Wed Feb 21, 2018 4:41 pm



I get the vast majority of my electronic parts from http://www.Digikey.com and http://www.mouser.com - either will have decent, quality audio transformers. You want one with relatively low impedance, look for around 300-600 ohms, and good frequency response.

This one has excellent frequency response, up to 15 KHz, but it's a bit expensive at $20 apiece - but made in Canada, not China:

https://www.digikey.com/product-detail/ ... -ND/454936



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dwgeo104
Posts: 13
Joined: Sun Oct 28, 2012 6:37 pm
Location: Vevay, Indiana
Motorcycle: 1995 GOLD WING GL1500SE

Re: Adding an Aux input to the GL1500 radio

Post by dwgeo104 » Mon Mar 12, 2018 12:24 pm

I just finished my audio upgrade on my 95 SE. Bought an LVPIN 2.1 Mini Amp and mounted it in my trunk with Velcro. Get any one with the decibels you want. Get one with an MP3 Plug input - save yourself some heartache. Took my out Radio to tie into output 1, 2, 3 & 4 pins and ran RCA Plugs to Amp. Be sure to use a filter on your power line - I tied to 12v Accessories Power @ my fuse box. Finally, be sure to spend a few dollars more and use an RCA Plugged Ground Loop Filter. I used a bit more Velcro and put an MP3 Player up front - got about 5,000 tunes at my finger tips and of course AM/FM Radio if I get bored with that. Sounds great, has no pops or buzz - and has power to spare. Total cost (not including new Speakers or MP3 Player) was around $25.

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Alemayehu
Posts: 56
Joined: Fri Oct 03, 2014 3:21 am
Location: Christchurch, New Zealand
Motorcycle: 1983 Honda GL1100I Sold
1987 Honda GL1200I
1997 Honda GL1500A
1982 Honda CX500 Sold
1981Honda CX500 Sold
1985 Honda GL650 Sold
1982 Honda GL400 Sold
1990 Yamaha 400 Sold

Re: Adding an Aux input to the GL1500 radio

Post by Alemayehu » Sat May 05, 2018 12:54 am

Hello friends I have done every thing as every one of describe how to add an aux input to my 1997 gl1500 Asp.I solder the right speaker cable to C140 and left speaker wire to C139 and the ground attached it to one of the screws securely no mess at all it is clean job and it works but I can't full the tape with dummy cassette instead I need to put normal cassette what it does, it over ride the voice that comes out of the cassette and start to play from my iPhone. of course there is some voice but totally can't notice it that much, when I unplug the aux cable the tape plays with its normal level of sound.What can I do? Please help
Jesus is Lord!

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PedroTQ
Posts: 181
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Location: Perth, Western Australia
Motorcycle: Motorcycles on the road;
1976 GL-1000 DJP outfit
1988 GL-1500 HRD outfit
1998 Valkyrie

Re: Adding an Aux input to the GL1500 radio

Post by PedroTQ » Tue Oct 09, 2018 5:13 am

G'day to Everyone :D

well after much messing about and brain racking i finally got my 90SE unit to play my tunes through an Aux input and bypassing all the messing about with blank tapes.

This is for the RM-G30p units.

The RM-G30p used in the SE models.
The RM-G30p used in the SE models.


As the name badge states.
As the name badge states.

You will first need to dismantle the unit as per instructions previously posted.

I ran my Aux cable through a hole i drilled in the side of the casting and bunged it up with a rubber grommet to keep dust and moisture out.

I also connected my wires to the Negative side of the Capacitors 139 & 140, i think other instructions state the Positive side? anyway mine works fine.

The main (mother) PC board out.
The main (mother) PC board out.

TO BE CONTINUED;
#1 - 1975 GL-1000 - showroom
#2 - 1976 GL-1000 -DJP sidecar fitted
#3 - 1978 GL-1000 - RIP
#4 - 1975 GL-1000 - RIP
#5 - 1978 GL-1000 - RIP
#6 - 1988 GL-1500 - HRD sidecar fitted
#7 - 1998 GL-1500C - Valkyrie
#8 - 1990 GL-1500 SE - Naked 90

User avatar
PedroTQ
Posts: 181
Joined: Thu Jan 16, 2014 4:30 am
Location: Perth, Western Australia
Motorcycle: Motorcycles on the road;
1976 GL-1000 DJP outfit
1988 GL-1500 HRD outfit
1998 Valkyrie

Re: Adding an Aux input to the GL1500 radio

Post by PedroTQ » Tue Oct 09, 2018 5:31 am

CONTINUED;


you will need to remove R-196 from the board, or as i did just cut the trace on the board itself ( I didn't want to do something that i couldn't undo if this didn't work ), this way you can re-solder a jumper wire across later if you wish to return to standard.

I am guessing R-196 is a ceramic resistor?

R-196.
R-196.


Close up.
Close up.

You can see my messy cutting of the trace on the board, this is because one of my first attempts was to disconnect one leg of Diode D34 which is part of the Muting circuit, this let the tunes through but very low in volume.

The pics are a bit fuzzy so here is part of the diagram from the service manual to assist you in recognizing what to cut.

ScreenShot of the manual.
ScreenShot of the manual.

That's it! :D :D :D

Now if you want you can remove all the obsolete junk like i did.


TO BE CONTINUED;
#1 - 1975 GL-1000 - showroom
#2 - 1976 GL-1000 -DJP sidecar fitted
#3 - 1978 GL-1000 - RIP
#4 - 1975 GL-1000 - RIP
#5 - 1978 GL-1000 - RIP
#6 - 1988 GL-1500 - HRD sidecar fitted
#7 - 1998 GL-1500C - Valkyrie
#8 - 1990 GL-1500 SE - Naked 90

User avatar
PedroTQ
Posts: 181
Joined: Thu Jan 16, 2014 4:30 am
Location: Perth, Western Australia
Motorcycle: Motorcycles on the road;
1976 GL-1000 DJP outfit
1988 GL-1500 HRD outfit
1998 Valkyrie

Re: Adding an Aux input to the GL1500 radio

Post by PedroTQ » Tue Oct 09, 2018 5:47 am

CONTINUED;


now to remove the keypad, just remove the 4 screws.

Remove these 4 screws.
Remove these 4 screws.

Turn over and pull the 5 dial knobs from the keypad and lift it off taking care that the connecting wires and plug have to come through a tight slot.

Next remove the ten screws holding the PCB down, not all screws are the same so take note of which came from where as you will need to put this all back again.

Remove these 10 screws.
Remove these 10 screws.

carefully slide the board to the side and remove the 4 screws that hold the cassette mechanism in place.

Remove these 4 screws.
Remove these 4 screws.

Unhook the cables and pull them through the base casting.


Lift the complete cassette unit out and dispose of thoughtfully.

Dispose of thoughtfully.
Dispose of thoughtfully.

Refit the PCB with the 10 screws back in the correct places.

Refit this board taking care which screws came from where.
Refit this board taking care which screws came from where.


TO BE CONTINUED;
#1 - 1975 GL-1000 - showroom
#2 - 1976 GL-1000 -DJP sidecar fitted
#3 - 1978 GL-1000 - RIP
#4 - 1975 GL-1000 - RIP
#5 - 1978 GL-1000 - RIP
#6 - 1988 GL-1500 - HRD sidecar fitted
#7 - 1998 GL-1500C - Valkyrie
#8 - 1990 GL-1500 SE - Naked 90

User avatar
PedroTQ
Posts: 181
Joined: Thu Jan 16, 2014 4:30 am
Location: Perth, Western Australia
Motorcycle: Motorcycles on the road;
1976 GL-1000 DJP outfit
1988 GL-1500 HRD outfit
1998 Valkyrie

Re: Adding an Aux input to the GL1500 radio

Post by PedroTQ » Tue Oct 09, 2018 6:02 am

CONTINUED;

Now is a good time to convert the little globes to blue LED's.

Converted to LED's.
Converted to LED's.

Refit the keypad and fit the knobs.

For those who dont want to go through all this just to make their player a bit lighter you just do not plug CN-106 & CN-107 back in.


Just re-assemble as previous posts have stated and enjoy your tunes :D :D :D


The only problem this procedure leaves is the Tape logo on the LCD display on your dashboard flashes, i will be looking into how i can discomknockerate this, i am guessing just cutting one wire leading to the LCD display unit? another day :D


Happy, Safe and Tunefull Riding to All, Peter.
#1 - 1975 GL-1000 - showroom
#2 - 1976 GL-1000 -DJP sidecar fitted
#3 - 1978 GL-1000 - RIP
#4 - 1975 GL-1000 - RIP
#5 - 1978 GL-1000 - RIP
#6 - 1988 GL-1500 - HRD sidecar fitted
#7 - 1998 GL-1500C - Valkyrie
#8 - 1990 GL-1500 SE - Naked 90

User avatar
PedroTQ
Posts: 181
Joined: Thu Jan 16, 2014 4:30 am
Location: Perth, Western Australia
Motorcycle: Motorcycles on the road;
1976 GL-1000 DJP outfit
1988 GL-1500 HRD outfit
1998 Valkyrie

Re: Adding an Aux input to the GL1500 radio

Post by PedroTQ » Thu Oct 11, 2018 3:20 am

G'day to Everyone! :D

After a few miles on the road i realized that that flashing cassette logo was just too annoying to leave it for someday, so here's what i did;

Firstly the dashboard has to be removed, all instructions for this procedure are in Converting your dashboard lights to LED's.

Once in your hands you need to remove the six screws that hold the perspex dash screen in so you can remove it and the shroud within.


Remove the two screws that hold the speedo in and the white speed sensor plug and the ****.


Carefully remove the speedo and the plug through the keyhole.


Remove the four screws that hold the tacho in.


Carefully remove the tacho.


To make life a little easier find a shoebox the right size and a couple of long 5mm bolts.


Slip the dashboard into the shoebox to hold it level.



TO BE CONTINUED;
#1 - 1975 GL-1000 - showroom
#2 - 1976 GL-1000 -DJP sidecar fitted
#3 - 1978 GL-1000 - RIP
#4 - 1975 GL-1000 - RIP
#5 - 1978 GL-1000 - RIP
#6 - 1988 GL-1500 - HRD sidecar fitted
#7 - 1998 GL-1500C - Valkyrie
#8 - 1990 GL-1500 SE - Naked 90

User avatar
PedroTQ
Posts: 181
Joined: Thu Jan 16, 2014 4:30 am
Location: Perth, Western Australia
Motorcycle: Motorcycles on the road;
1976 GL-1000 DJP outfit
1988 GL-1500 HRD outfit
1998 Valkyrie

Re: Adding an Aux input to the GL1500 radio

Post by PedroTQ » Thu Oct 11, 2018 3:34 am

CONTINUED;


Remove the four screws that hold the LCD framework into the dash.


Carefully lift out the LCD screen out and let it hang over the top of the dash, then remove the two screws.


Spin the complete shoebox and dash around 180 deg, flip the LCD screen over to expose the other two screws, then remove them. The two metal side plates will now be free to lift off.




Very, Very carefully prise the PCB off the LCD frame and do not touch the white rubber strips with the black dotted lines down the middle (one on each edge) then place aside.


You will need to work on this PCB so to give it a little stability, i supported it with a plastic ruler.



TO BE CONTINUED;
#1 - 1975 GL-1000 - showroom
#2 - 1976 GL-1000 -DJP sidecar fitted
#3 - 1978 GL-1000 - RIP
#4 - 1975 GL-1000 - RIP
#5 - 1978 GL-1000 - RIP
#6 - 1988 GL-1500 - HRD sidecar fitted
#7 - 1998 GL-1500C - Valkyrie
#8 - 1990 GL-1500 SE - Naked 90

User avatar
PedroTQ
Posts: 181
Joined: Thu Jan 16, 2014 4:30 am
Location: Perth, Western Australia
Motorcycle: Motorcycles on the road;
1976 GL-1000 DJP outfit
1988 GL-1500 HRD outfit
1998 Valkyrie

Re: Adding an Aux input to the GL1500 radio

Post by PedroTQ » Thu Oct 11, 2018 3:52 am

CONTINUED;


There are three traces that feed the cassette symbol, one for each arrow (which do not flash) and one for the cassette outline (which constantly flashes whilst playing your tunes)(goes away when radio playing).

I opted to remove all three, the two arrows and the outline.

Don't forget this pic is with the dash turned around 180 deg with the fuel and temp gauges to the top.

the 3 traces and what they drive.
the 3 traces and what they drive.

I used a snap off blade cutter to cut the traces and peel them back a little.


I then peeled them right off with artery clamps.


Very carefully re-assemble in the reverse order

With the RM-G30p unit there is also another logo that shows up when the tape deck is unplugged, I have 3 LCD units, two have what i think is the "Dolby" logo and one has "TMS" in the same place, I opted for one of the Dolby logos so i know my tunes are selected.

The Dolby logo in my bench test unit with the cassette logo discomknockerated.
The Dolby logo in my bench test unit with the cassette logo discomknockerated.

Have fun, Peter.
#1 - 1975 GL-1000 - showroom
#2 - 1976 GL-1000 -DJP sidecar fitted
#3 - 1978 GL-1000 - RIP
#4 - 1975 GL-1000 - RIP
#5 - 1978 GL-1000 - RIP
#6 - 1988 GL-1500 - HRD sidecar fitted
#7 - 1998 GL-1500C - Valkyrie
#8 - 1990 GL-1500 SE - Naked 90

User avatar
WingAdmin
Site Admin
Posts: 19686
Joined: Fri Oct 03, 2008 4:16 pm
Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (wife's!)
1998 XV250 Virago (sold)
2007 Aspen Sentry Trailer

Re: Adding an Aux input to the GL1500 radio

Post by WingAdmin » Thu Oct 11, 2018 9:58 am

Just a suggestion: Rather than removing the actual contacts on the PC board (the exposed ones that contact the rubber zebra strips on the LCD), I would use a sharp knife (hobby knife) to just cut the traces right next to the contacts. This has the exact same effect, with the benefit that if you ever choose to reverse the process, it's easy to do by putting a small dollop of solder across the cut trace to reconnect it.



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