Anyone have the Alto TS110A Pre schematics ?

[JP-Stereo]

Or if someone know another model that use a similar Preamp...

I only need the Preamp drawings as the Amp for this model is common among several other model.
The amp board is the DM350w+65w board with all the components installed.
I even saw this very same amp board without the mid and high frequency component populated in some subwoofer model.

[g1]

Does this give anything useful? https://www.scribd.com/document/5608...e-manual-v1-0#

[JP-Stereo]

Yes Sir
This one didn't show in my research, thanks a lot !

The Preamp and the Amp look like to be exactly the same as the TS110A at least in term of inputs and wiring.
I will try to work with it.

[JP-Stereo]

Back here...

It was of great help for general schematics and circuits applications.
From the inputs it's nearly identical.
But from the output of the preamp, big differences.

The TS110A Pre have a capacitor in serie at the output connectors and many more OpAmp.
I have no signal at J6 (tweeter preamp) output.

I have nothing similar in my others Alto schematics.


2 Mic/Line inputs and 1 Mix output.

The TS110A must be similar to another model at least for the Preamp since it already have the common amplifier module.
It look like i will have to remove the Mix output connector...

Please have a look if you have some Alto stuff.

[x-pro]

Back here...
The TS110A Pre have a capacitor in serie at the output connectors and many more OpAmp.
I have no signal at J6 (tweeter preamp) output.

Hello.
Can you be more specific about what's wrong? Please specify the position numbers on the diagram.

[JP-Stereo]

Starting a new repair thread on this topic right away.

About the schematics, this PRE board have many difference on the output side from other Alto i have.
There are more opamps in this version than previous one and toward the pre-output the parts numbers do not match.
It seem that there is a condenser right before the connector, other have a resistor before the condenser and some do not have a condenser...