hi guys..tryin to fix a tank i just got for my son and having a bit of a head scratcher...[>:] the tank has no sound..? it starts up and all functions work but no sound from anything...
i've fitted new boards (rx14), has a fresh batt, speaker is plugged into dp1, speaker connections on actual speaker are ok and volume knob has been turned up..
no sound...
have also tried a couple of controllers and 2 x different sets of crystals...
any ideas guys...? have tried the search but couldn't really find anything..first i've heard of this...[&o]
cheers, rgds stuart

Stuart posted a reply on this in the "other" thread

Regards Rob

sorry rob..jumping between laptop and poking at the bulldog to see if its magically fixed itself and didn't see reply...! there's no sound at all mate, silence...have wriggled wires around (usually my 1st action when tank's having probs...!) but nowt..all connections with speaker seem ok and board but dunno...? getting late and i'm not too clever with the electrical side o things at the best of times...!! planning on replacing speaker at some point but want to know what the problem is 1st..? (and my sonwill be out here in the garage every 5 minutes tomorrow to see whether i've fixed it..!!)
cheers, rgds stuart

The volume knob can and does go bad, but if I read it right you changed that also?

The Blitz

HHmm that is a strange one mine just started working all by itself but it did work very quietly on max volume

have you tried the volume switch ??
and the two strips that sit in the middle of the board in an "L" shape and gave them a good "wiggle"?? Circled in yellow in the Pic

The wiper contact thingy (shiny) on the little volume board can bend outwards and loose contact, check the 3 wires going from the function (big) board to the mini volume board, push the wiper and see if you get a noise. Also, have you at any stage mistakenly plugged the speaker in to DP2 (Smoker socket)? If so, the speaker may of been damaged but rest assured another will be easy to come by.

If you're unsure on the speaker, find another small speaker to test, or quickly hook a small battery to the speaker and if it "thumps" (moves) if it does it should be fine to make noise.

cheers for replies guys....
blitz..don't think its the volume knob as its a new one and have got a noise from speaker...
rob..tried wiggling those boards about and apart from one single burst of noise as i picked up board can't get anything...
wacky..it would be entirely possible for me to connect speaker to smoker socket but i know i haven,t (this time)..! tried the speaker on a battery and got a noise and also had the one single noise from speaker so that should be ok..not sure what the wiper thingy is..? is it the black shiney blob on back of cards..? tried the 3 wire data cable and have had a general poke/prod/wriggle about of things but nada...![:@]
starting to think its the replacement board i put in which will now probably be replaced with another replacement..!![:@][:@]
they've about doubled in price too since last i had to buy one..?!
cheers, rgds stuart

just an update guys...all sorted..
after having ordered a new board, got fed up waiting for it to arrive and was looking closely at board for the 10th time and noticed the big grey resistor(?) wasn't quite making contact with the board..? so one blob of solder later, full sound..!!! not bad for a £20 "faulty" bulldog from the fleabay..!!!
and tomorrow morning i will be one 4 year olds hero..!!! priceless..
cheers guys, rgds stuart

glad you got it sorted

Excellent. That big resistor sticks up a far bit and no doubt sitting in their factory stock it could get caught on other boards and become loose. I have heard of two other cases where one end of the grey resistor comes unsoldered/dry joint, but these were upgrade (non-factory installed) boards installed by electronics amateurs. Nevermind, an easy fix - glad you're back in business!!

you upgraded any of your speakers wacky..? moving it anyway in bulldog as i've binned the smoker as tank is for my son, i'm making it all plastic, lightweight..? like the idea of an ipod speaker or something but think i need to build an enclosure...[>:]
cheers rgds stuart