Function
SYSTEM µ-COM E-VOLUME POWER AMPLIFIER POWER IC MUTE CONTROL LOGIC EQUALIZER AMPLIFIER SUB MOTOR DRIVER RESET IC EEPROM P.CON.DETECTION BACK-UP DETECTION SERGE DETECTION ACC DETECTION PREOUT MUTE DRIVER 5V SW DSI SW PANEL 5V SW Detects P.CON voltage. Detects the back-up voltage. Detects serge voltage. Detects ACC voltage. 3 input NOR gate x 3 For full logical cassette mechanism control Speaker output
Operation
For full logical cassette mechanism sub motor driver Detection voltage below 3.0V
Mutes when the base terminal voltage level becomes "L". Works when the base terminal voltage level becomes "L". LED for DSI works when the base terminal voltage level becomes "H". Works when the base terminal voltage level becomes "L". Supplies VDD to panel. Mutes when the base terminal voltage level becomes "H". Discharges the capacitor's voltage of SVR terminal after the base terminal voltage becomes "H". Changes to the local seeking after the base terminal voltage becomes "H". Works when the base terminal voltage becomes "H". Supplies the power to the motor driver. Works when the base terminal voltage becomes "L". Works when the base terminal voltage becomes "H".
Q221-224 PREOUT MUTE Q251 Q301 Q501 Q551 Q552 POWER IC SVR SW LOCAL SEEK SW MOTOR DRIVER AVR MAIN MOTOR SW MAIN MOTOR SW
q SWITCH UNIT (X16-1532-71)
Ref.No.
IC1 IC2 Q1 Q2 Q3
Receives key signal when the base terminal voltage becomes "L". Key illumination color becomes green when the base terminal voltage becomes "H". Key illumination color becomes red when the base terminal voltage becomes "H".
