Can I tap into these audio circuits by desoldering Op-Amps and putting wires in their place?
Based on the work of three predecessors (Convert a radio tape player..., How To Make A Audio... and Play and Recharge Ipod...) I'm looking at ways to bring in audio from two sources. I'm putting in a CD-ROM drive to be my CD player, and I'm adding a headphone jack for my BlackBerry so I can listen to MP3s, Pandora, and streaming radio.
It appears that there are two ICs that act as preamps in the boombox, one for the CD portion, and one for the cassette. See the pictures for where they are located on the board. Photos 3 and 4 are pinouts for these ICs as found online.
I want to remove the BA4558 and solder in a connecting cable for the audio out from the back of the CD-ROM: Left to OUT1 on the board, Right to OUT2, and ground to VEE.
Likewise, I want to remove the BA3308 and solder in a cable with a male 1/8" headphone jack to plug into the BlackBerry. Left to OUTPUT1, Right to OUTPUT2, and ground to GND.
Then I'll be able to switch the selector from the boombox to CD and play CDs, and to Cassette and listen to the 'Berry.
Will this work? What are the likely pitfalls?