[Android Head-Units] sun.valeo:
Translation using Google translator.

Upgrade device NewsMy CarPad CarPad 2 and 3

Print the RSA connectors (cinch) from the device to connect external amplifiers for low level.

So briefly the theory, in our devices is no low-level outputs with RSA connectors, or rather is, but it is a common and is used to connect an active subwoofer or a candy bar with a passive subwoofer, and this in fact a little if you want to build a good and powerful speaker in the car, using an additional one, two or more amplifiers to the construction on channel sound, without losing the high-level outputs and use them for additional speakers.

There are certainly a couple of options:

1) Use transmitters with high-level low, but those who understand what it was about and understand the intricacies, they know that such transmitters of good quality are not deshego, not expensive not give proper quality, and by simply can produce pickup sound . For reference, one worthy of the converter is in 5-7t.r area.

2) Use amplifiers with high-level inputs signals, that is to put the output to the speaker directly to the amplifier. Not a bad option, but also not cheap. Such amplifiers are considered higher-class amplifiers, and therefore much more expensive.

I suggest not expensive option to expand the possibilities of the device used by us, at the same time is not particularly spend on upgrades. Requires 4 RSA connector, a few centimeters of wire and straight arms.

First of all, I want to warn you that neither I nor the administration of the site are not responsible for your actions with your device. Whatever you do, you do at your own risk. I would like also to remind those who have a device under warranty, the intervention in the design of the device and the opening of the seals, you lose the warranty from the manufacturer or retailer.

Let us proceed.

In our device installed audio processor Wolfson WM8988 have attached a link to the complete documentation. This audio processor is installed in CarPad 2, the head unit on the board and not in the remote Blocks in total 3 CarPad board. But its location on two identical devices.

Located audio processor is not far from the amplifier chip, the one that is fixed to the back wall with two screws and it looks on the board of the head unit as follows:

Sam audio processor, I selected a red square, as in the photo, I have a place soldering wire low-level outputs 1, 2, 3, 4, 5, 6.

of them:

1) HPCOM an audio processor raspikovke. In fact it is common minus (-) for the first pair and LOUT1 ROUT1 outputs.

2) LCOM pin-on audio processor. In fact it is common minus (-) for second pair and LOUT2 ROUT2 outputs.

3) ROUT1 an audio processor is pin-right, front channel, its (+).

4) LOUT1 pin-on audio processor for left front channel, its (+).

5) ROUT2 an audio processor is pin-right, back channel, it (+).

6) LOUT2 an audio processor is pin-left, back channel, it (+).

Contacts 3, 4, 5, 6 to solder directly to the copper point, I have them. Before sol- dered to positive contacts RSA outputs to add capacitors 10MKf, it is required to protect it outputs a low level from an existing 1,6V DC current. At the request of the manufacturer. Contacts 1, 2 soldered directly to ceramic capacitors and lead to negative output terminals RSA.

I enclose pinout audio processor Wolfson WM8988, for verification. In one of the corners of the audio processor has a marking point, and it serves as a reference pin-on.

Now, an explanation of why the soldering ends (+) and minus outputs O (-) wire, selected there, and not directly to most audio processor?

Quite simply, it says in the specifications and recommendations of the audio processor manufacturer.

Specifically, the following is said:

Schematics attach the manufacturer's recommendations:

To avoid questions like, why these contacts are listed as the front, but the rear waist. The specification describes the measurement frequencies Hz and Ohm, and for him it is obvious that where the frequency higher is generally used for the front and where the frequency is placed below the rear. Well, this is from the realm of theory.

I shall warn those who dare this upgrade prodelyvat yourself in the photo and in the diagrams, it looks not as a living, but much smaller and jewelry. Man is not experienced and without special tools such soldering produce is almost impossible. Therefore, if you do not have the skills of soldering of small parts and tracks, it is better not to try to do it, and entrust this work to a specialist acquainted with the attached instruction I, pictures and diagrams. For him it is not a difficult task and you will be calmer, and not ruin the device.

Well, and now I attach a photo after the device upgrade. The unit now has 2 pairs of high-level output, 2 pairs of RSA low level outputs and a pair of RSA subwoofer output. In my opinion this is quite enough, that would make a nice sound in the car.