Kenwood KA-7090R Service Manual

Also see for KA-7090R: Service manual

6. Microprocessor periphery block diagram(K's KAF-7002,5002)(KA-7090R)SERIAL x2DATA, BUSYMOTOR VOLUP/DOWNx3KEY INPUTsP sw |NPUT (ROTARY SW)INPUT INPUT (ROTARY SW)SELECTORIC x3 (K's)DATA, CLOCK, BUSYTC9162 (FUNCTTON SW)TC9164 (REC OUT SW)SELECTOR lC x5(KA-7090R). DATA, CLOCK. BUSY (TC916X). cLR, STB(NJU3711)TC9162 (FUNCTTON SW)TC9164 (REC OUT SW)NJU3711(tNPUT SEL SW)CIRCUIT DESCRIPTIONDESTINATION x2ADCOMPO/K's DISCRIMINATIONKAF.7OOA5OO2 DISCRI M I NATION(K's)KA-7090RLED DISPLAY x 13SELECTOR LED/RELAY CONTROL xGREC OUT LED x 1A.T.T. LED x 1ON/STANDBY LED x 1LOUDNESS LED x 1S. DIRECT LED x 1SP RELAY x 2LED DISPLAY x 14SELECTOR LED x 6MD/MONITOR LED x 1MUTE LED x 1ON/STANDBY LED x 1LOUDNESS LED x 1DIRECT LED x2SP RELAY x 2POWER ON x 1:@N5N:1>!6ö@@gDTalAUDIO MUTE x 1HEAD PHONE x'l(K's KAF-7002,5002)DIRECT ENCODER x2PROTECTION x 1RESET x 1CE x1DESTINATION x 2COMPO/K's DISCRIMI NATION8/16 bir CHANGE OVER(KA-7ogoR)