HARMAN KARDON CR-131 AM-FM HIFI RECEIVER DECK AUTO KAZETTASRADIO SM Service Manual download, schematics, eeprom, repair info for electronics experts
Just bought a Receiver for $50. It's not HDMI compatible but it has a couple receivers, an S line in and out and I think it just looks good for the money.
Harman Kardon CR-131, NOS for sale.
HARMAN KARDON AVR-158, AVR-155, AVR-134 replacement remote control of another appearance for 12.3 € - AUDIO HARMAN/KARDON | emerx.eu