Z-Tech Computer Accessories Shop

Successfully converted this Peltier cooled dispenser into a water vendo machine from a local client.

Mini-amplifier for cars or home use. Multiple audio source channels (Bluetooth, USB, SD cards, RCA aux, or FM radio). Can be powered either with a 220V mains outlet or 12V battery supply. Stereo input and output with mic and echo function. Grab yours now!

Available in store, 4-channel passive professional audio mixer! Great for gigs or home use. Grab yours now!

For gamers out there, we have an RGB-backlit wired USB keyboard available in store. Grab yours now!

For your office, school or gaming, try Delux KA150 USB wired keyboard, now available in store!

Device: Pisowifi Vendo

Issue: Checking up the machine as it will be relocated to another area. Customer wants to make sure that the unit is functioning normally before transferring to another location.

Fix: Cleaning the board using contacts cleaner and reconditioning it.

Device: Robot brand mini bluetooth speaker.

Issue: Turns on but no audio or sound output.

Cause: Broken speaker spider wire as the customer recounted that the device was dropped and after then, it will not sound anymore.

Fix: Resolder the broken spider wire.

Pisowifi sent to the shop as customer is quite tired and exhausted that he can't find and locate the cause as to why his machine will not work. This one is a bit tricky, because the main culprit is the coinslot. Coinslot seems harmless and you can't doubt it because it normally turns on. But recalibration will not work and upon checking the voltage on coin signal wire, 12V is present which is supposedly none. Fortunately, the Raspberry pi 4 was not fried. I just have to assign on the software the coin detect pin because the first pne was damaged due to the 12V supplied to it.

Job done: Reflashing new software as the owner did not know the original software used and they don't have any contact with the original builder and also replacing the universal coinslot.