2 - 2
DC-DC CONVERTER
UP CONVERTER CIRCUIT
FOR TUNING VOLTAGE
• LOGIC UNIT
(BOTTOM VIEW)
AF FILTER
(Q301)
AF PRE-AMP
(Q300)
CI-V LEVEL CONVERTER
(IC452)
SPEAKER MUTE SW
(Q507)
+3S LINE REGULATOR
(Q102)
REGULATOR FOR AF AMP
(IC454)
AF MUTE SW
(Q350)
EEPROM
(IC2)
AF FILTER CTRL
(Q508)
WIDE/NARROW MODE SW
(Q302)
CLOCK SHIFT SW
(Q1)
AF POWER AMP
(IC450)
DC SW
(Q500)
ELECTRIC VOLUME
(IC451)
CHARGING CIRCUIT