Schematic for Promariner ProTech 1220i - Protech Televison & Video

Question edited for clarity.

eBay for $32

https://www.ebay.com/itm/195826643068

https://www.kingersons.com/PROTECH-411018-PRO-520-Non-Programmable-Thermostat-(HP:-3H-2C)-72126.html

..

Automatic battery chargers have complex circuitry that is difficult to test especially when designed and built in a compact package and repairs are best entrusted to someone geared to such work which is outside the scope of general electronics.

On the plus side, as long as the intelligent circuitry is protected against mains borne surges and spikes the automatic charger is somewhat self-protecting against over stress and will tend not to even attempt to charge a defective battery, a sulphated or overly discharged battery.

I suggest you first check the battery or batteries to ensure they are healthy and have some charge so the charger can "see" them before condemning the charger and also check the connections to the battery that must be virtually perfect...

http://www.promariner.com/en/distributor-locator

Try this link to download the schematic to your tV.

I would try re-installing the drivers:

http://www.mackie.com/products/onyxiseries/drivers/

And go for a firmware install as opposed to an upgrade, if it failed halfway through the upgrade you will need to load the firmware on from scratch.

OK... first thing is to DUMP ALL anti-virus and Anti_spyware and real time defragging programs as these resource hogs **** processing away from teh sound generation. Also is you are recording at the same time, if your disk is fragmented requiring a lot of head movement to record the time lags can cause buffer underruns and break up of audio... and eventually having the audio program "crashing" due to lack of throughput.
When doing audio work suspend all the resource hogs like the above mentioned programs. It is a good idea when recording CD's as well.

What is the setup you are using. What mics (make and model). What are the settings for the channels? With this info, I should be able to assist.

Please update this.

Thanks,
Dan

Our protech TV model PH-TVS21A1,was locked accidentaly. how can we unlock it?

I am too looking for the instruction manual for the Protech "My First Computer". Did you find it treefrog8?