Components Description - Kenwood DPX302 Service Manual

● SWITCH UNIT (X16-394x-xx)
Ref. No. Application / Function
IC1 Remote Control IC
Q1~3 GRID DRIVER
Q6,7 SW5V
Q9 RED SW
Q12 VFD RESTART
● ELECTRIC UNIT (X34-414x-xx)
Ref. No. Application / Function
IC1 System µ-COM
IC2 E. Vol
IC3 A8V Ref Power supply
IC4 Power IC
IC5 ILL+B Power supply
IC6 Muting logic IC
IC7 Reset IC
IC12 SW Regulator
Q1,2 B.U.5V AVR
Q3,11 SW5V
Q4,9 SW14V
Q5,6,10 AUDIO8V AVR
Q7,8 SERVO+B AVR
Q12 SW for IC12
Q13 PANEL 5V
Q101,102 P-ANT SW
Q103,106 P-CON SW
Q104,105 P-CON Protection
Q107 EXT-AMP-CON
Q108 Small lamp det SW
Q109 SERGE Det.
Q111 BU det
Q112 ACC det
Q113 Mute-Driver
Q114 Mute-Driver
Q115,116 Pre-out mute driver
Q298,299 Tuner8V SW
Q300,301 AM+B
Q302,303 Tuner8V
Q305,306 SW ILL+B
Q400~403 Pre-out mute SW

COMPONENTS DESCRIPTION

Each TransisteR's base is "L" then GRID is On
The Power supply of IC1 is turned on when Q6's base level goes "L"
RED LED is turned on when Q9's base level goes "H"
Key scan start at Q12's Base goes "H" when the SET's Power is On
Controls FM/AM tuner, the changer, CD mechanism, Panel, volume and tone
Controls the source, volume, tone
Output 1.27V
Amplifi es the front L/R and the rear L/R to 50W maximum.
Output 1.225V
Controls logic for muting
"L" when detection voltage goes below 3.6V or less
Power supply for mp3 and VFD
While BU is applied, BU5V AVR outputs +5V
When Q11's base goes Hi, SW5V outputs +5V
When Q9's base goes Hi, SW14V outputs 14V
When Q10's base goes Hi, A8V AVR outputs 8.0V
When Q8's base goes Hi, S+B AVR outputs 7.5V
When Q12's base gose Lo, IC7 is turned on
When Q13's base gose Lo, PANEL5V outputs 5V
When Q102's base goes Hi, P-ANT SW outputs 14V
When Q106's base goes Hi, AVR outputs 14V
Protect Q103 by turning on when P-CON output is grounded
When Q107's base goes Lo, Q107 is turned on
When Q108's base goes Hi, Q108 is turned on
When Q109's base goes Hi, IC4 is changed into a standby state
When Q111's base gose Hi, Q111 is turned on
When Q112's base gose Hi, Q112 is turned on
When a base gose Hi, Pre-out mute driver is turned on
Q114 turned on by RST
When a base gose Lo, mute driver is turned on
When Q299's base goes Hi, Tuner8V output 8V
When Q301's base goes Hi, AM+B is out
When Q303's base goes Hi, Tuner8V outputs 8V
When Q306's base goes Hi, SW ILL+B outputs 11V
When a base goes Hi, Pre-out is muted
DPX302,DPX-MP2100
Operation / Condition / Compatibility
Operation / Condition / Compatibility
3