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Sound Systems tech This section is dedicated to the sound systems for our models. Tamiya MFU, Servonaut, etc.


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Old 04-10-2022, 10:14 PM
ittigger ittigger is offline
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Default Wheel Loader Sound System

Hello all, it's been awhile. I'm working on a Wheel Loader, looks exactly like this - https://www.youtube.com/watch?v=oE_DyZMXX3M, but it was purchased through RC Model Design (https://rcmodeldesign.com/all-products). Allegedly, it came with no manuals. The first problem was that the radio lost binding with the receiver. Upon binding, everything began working again, except sound. It appears to have 9 channels plugged into the receiver. I have figured out what buttons the auxiliary channels 'should' be on, based on youtube videos, like the one presented. I have mapped channels 1-5 and 7-8. No idea what 6 and 9 do. That said, I cannot for the life of me see where a speaker is, or should go. It looks like the lighting module sits directly beneath the receiver - but I haven't taken it out to verify.

Has anyone worked on these - and can help? Supposedly, when you plug the battery in, it should beep, you turn on the engine sound and then you can drive it, etc. When I plug the battery in, the beacon (flashing light) comes on, I can drive right away ... no sounds. I have disassembled the cab - there is nothing in or under it. There is nothing in the front - other than hydraulics. In the rear, we have the hydraulic well, pumps (servos), esc's (2), receiver and lighting module? I can find all the lights - and they all work as they are supposed to. No sound whatsoever.

Any ideas?

Last edited by ittigger; 04-10-2022 at 11:16 PM.
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Old 04-10-2022, 10:46 PM
skeeter skeeter is offline
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Default Re: Wheel Loader Sound System

I have the identical loader, but DON'T have light or sound system in it. Mine has been trouble free for several years & way too many hours to count!
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Old 04-10-2022, 10:50 PM
ittigger ittigger is offline
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Default Re: Wheel Loader Sound System

Quote:
Originally Posted by skeeter View Post
I have the identical loader, but DON'T have light or sound system in it. Mine has been trouble free for several years & way too many hours to count!
Do you have the manual .. does it show where the sound system would go / how it's hooked up? Are you using channels 1-9?

Because I have absolutely nothing to go on, other than whatever the systems stock settings are, I have the following (using a Flysky FS-i6s):

ch1 left / right
ch2 fwd / bckwd
ch3 raise and lower bucket
ch4 tilt bucket
ch5 hydraulic pump
ch6 unknown
ch7 lights (roof / head / tail)
ch8 beacon
ch9 unknown

Mix 1: Channel 1 master, Channel 5 slave, -100, +100
Mix 2: Channel 3 master, Channel 5 slave, -100, +100
Mix 3: Channel 4 master, Channel 5 slave, -100, +100

Left stick up, boom down
Left stick down, boom up
Left stick left, bucket up
Left stick right, bucket down
Right stick up, Forward
Right stick down, backward
Right stick left, turn left
Right stick right, turn right
SWA - hydraulic pump
SWB - unknown (CH6)
SWC - blank
SWD - blank
VarA - unknown (CH9)
VarB - up / roof lamps
VarB - down / headlights & tail lights
K1 - beacon
K2 - blank

Last edited by ittigger; 04-10-2022 at 11:08 PM.
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Old 04-12-2022, 09:51 PM
ittigger ittigger is offline
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Default Re: Wheel Loader Sound System

Anyone have any ideas that can help?
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