AUX input on a Panasonic RX-5025

[trool]

Hello,
I'm trying to add a AUX input to my Panasonic RX-5025 but I can't figure out how.
I have disassembled it completly and found the datasheet for the amp (AN7146)
I have also tried reading a large number of online guides but I'm to stupid to understand unfortunately.

How do I connect the AUX to the amp? Is this the best way to do it?
When I hook it up directly to the cassette head the distortion is absurd.

I am sorry if I posted in the wrong subforum.


Thank you!

 

[superlew]

viewtopic.php?f=47&t=12363
This is a good place to start. Some Panny's can be tricky, because the tuner, pre-amp, and amp are all on the same board. There is a way around it. How are your soldering skills? Post some pics of the boards and we may be able to help out.
You'll need:
Soldering/De-soldering iron
Swithed 1/8" stereo jack
18 - 22 AWG wire (colors are up to you)
Shrink tubing
Drill w/ appropriate sized bit
Small zip ties
6 pack (pace yourself, it takes a little patience)
Hope this helps.

 

[trool]

......

Hope this helps.

Thank you!
My soldering skills are okey, my fathers are even better so that's not a problem.

I have read about cassette-adapters, are they good? The internet seems to have different opinions about these. What do you think?

Pictures: http://imgur.com/a/UYaUQ/all


EDIT: no problem giving up the cassette/radio-function. All I really need is an input for AUX...

 

[AE_Stereo]

The simplest point to connect Line-in is the Volume control legs. As long as the machine is on in any mode,this will work with any radio/stereo.
Before doing that, can you post the picture of the input/output terminal sockets of the unit (from outside) ?

 

[trool]

The simplest point to connect Line-in is the Volume control legs. As long as the machine is on in any mode,this will work with any radio/stereo.
Before doing that, can you post the picture of the input/output terminal sockets of the unit (from outside) ?

I have tried connecting to the volume control but I'm unable to get a clean sound without distortion. Sounds terrible when i try actually. I really dont understand to witch circuits my AUX left and right should connect... Is my multimeter to any use?

Pictures of Volume Control + Inputs/Outputs: http://imgur.com/a/6PU6w

 

[trool]

I've got a DIN 5-pin, can I use this as audio in with a converter?

I'm confused....

 

[AE_Stereo]

I've got a DIN 5-pin, can I use this as audio in with a converter?

I'm confused....

DIN pin must have Line-In, but only for Recording. Means, Cassette should be in record mode to get the sound in. If it works, try to make a cut-off switch for the Motor, like the remote function in many old boxes! Pl. see my post in the reference given by superlew (2nd post in your thread). Your box does not seem to have remote function.

Volume control normally should work. What is your source audio device?

 

[superlew]

You need to find the last component (resistor. capacitor, etc.) in the tuner portion of the board. In the 5010 I did in December, there were 2 caps, one for each channel. I'm not sure if this board is the same, but the principal is the same (I gave the box to a friend). Tracing circuits works, but schematics work better.
Jump the component(s) to your switched jack, back to their respectful place on the board, and voila!
The hardest part is making it pretty.
It should look something like this when you're done:

Here's the inside of a little GE I did for my brother (not the cleanest job I've done):

This is just to give you an idea as to how you'll need to shoehorn in the new wiring with the jack, but every box is different.

This mod is super-clean and super-functional. The deck can record from your source, just like the radio and the record-in.
Take your time and you'll be glad you did. I think it's a "Must-Mod" for many boxes.

Sorry to jack your thread. Just hoping to point you in the right direction.
If you do this mod right, you'll forget the cassette adaptor existed.

 

[trool]

Volume control normally should work. What is your source audio device?

The source is an iPod classic. How do I hook it up to the volume control? Are there any detailed guides?
Thank you for the reply

You need to find the last component (resistor. capacitor, etc.) in the tuner portion of the board. In the 5010 I did in December, there were 2 caps, one for each channel. I'm not sure if this board is the same, but the principal is the same (I gave the box to a friend). Tracing circuits works, but schematics work better.
Jump the component(s) to your switched jack, back to their respectful place on the board, and voila!
The hardest part is making it pretty.
Sorry to jack your thread. Just hoping to point you in the right direction.
If you do this mod right, you'll forget the cassette adaptor existed.

Thank you, I have no idea how to trace the last component unforternatly. Any tips? Thank you!

 

[trool]

I can't reallly figure out how to connect to the volume control, when i get a sound, it's distorted and very low. Why is that?

Would pictures of the volume control help?

Thank you!

 

[trool]

aaaaaaaaaaaaaand it's me again, from the datasheet I got this picture

I have tried using Input Ch1 (= pin no 7 and 12) for my right/left but it doesn't work, the volume is very low and I get a buzzing sound.

What.... to... do?


EDIT1: Can i use the cassette head as input (withouot the crappy sound) if I get som resistors? What kind should I get? Anyway to know?

 

[superlew]

Wait a minute! Does this box not have a proper "Line-In?" I just Googled some pics of this model and it appears to have a dedicated Line-In input. Am I missing something? Wouldn't a RCA - 1/8" Stereo Plug suffice?
"If it ain't broke..."

 

[trool]

Wait a minute! Does this box not have a proper "Line-In?" I just Googled some pics of this model and it appears to have a dedicated Line-In input. Am I missing something? Wouldn't a RCA - 1/8" Stereo Plug suffice?
"If it ain't broke..."

No it doesn't unfortunately :'-(

 

[superlew]

Aaaah, Europe...
Does the function switch have a "Line-In" position?

 

[trool]

Aaaah, Europe...
Does the function switch have a "Line-In" position?

Nope, just SLEEP, RADIO and TAPE/OFF.
Bought a bunch of resistors, this is gonna be a long night....

 

[superlew]

OK. We're sort of leaving the realm of "Restorations and Customizations," and getting into "Tech Talk."
Start with the tuner section of the board (highlighted in yellow). If you can get a hold of a schematic this will be cake.

All you're trying to do is isolate the tuner, essentailly "switching" it from the amp.
After studying your photos, I think you may want to test these points with your source (marked in red), with the function switch set to "radio." Keep the volume on both your source and box very low. Work from here carefully, so that you don't short anything.

You can't just pipe in from the volume pot because your source is backfeeding the amp.
Again, if anyone here has a scheme for this Euro 5025, your life's gonna get real simple. Also, I don't recommend gluing things directly to the board. Make your jumpers as short as possible, without stressing them, even if it means finding a different solder point. Keep them neatly tied and this will eliminate any "floppiness."
I'm curious to see how you make out (and how well I studied). Good luck.

 

[AE_Stereo]

Aaaah, Europe...
Does the function switch have a "Line-In" position?

Nope, just SLEEP, RADIO and TAPE/OFF.
Bought a bunch of resistors, this is gonna be a long night....

Another thought.
Why not to try through the DIN socket itself. First find out the DIN pin configuration. If you google, you will get some idea.

Try with Line-out, if they are working. I think, you should be able to insert wire tips with just enough copper stripped directly into the pins, even if you don't have a DIN pin to start with. Try connecting to a headphone to find out if any audio comes out while playing the radio. If Line out is working, Line-in should be symmetrical to line-out pins.

Now see if you can get the audio in through one channel, while keeping the Pause+Play+Record button pressed. (You may have to defeat the Rec Tab protection). If you are able to get the sound in, then you only need to add a switch to cut-off the power to the motor.