Kenwood DDX8017 Service Manual page 12

DDX8017/8027/8027Y
DDX8037/8047/8067
Ref. No. Application / Function
IC413 Logic IC (Multiplexer)
IC414 Logic IC (Multiplexer)
IC415 Video switch
IC416 Video switch
IC500 Isolation amplifier IC
IC501 Logic IC (Inverter)
IC502 Logic IC (Buffer)
Q6 ANT-CONT SW
Q7 P-CONT SW
Q8~10 For P-CONT circuit control
Q11 For P-CONT circuit control
Q12 BU detection SW
Q13 For EXT-AMP control
Q14 For surge voltage detection
Q15 For surge voltage detection
For ±9V power supply
Q50
For ±9V power supply
Q51
Q52 SW14V power supply SW
Q54 For BU5V power supply
Q55 A8V oversupply SW
Q58 For BU5V power supply
Q59 A8V power supply
Q61 V5V power supply SW
Q62 SW5V power supply SW
Q63 For SW5V power supply
Q64 For V5V power supply
For ±9V power supply
Q65~70
SVR6.8V, audio 3.3V,
Q150
IC150 power supply SW
Q151 For SVR voltage reduction control
Q152 SVR6.8V, audio 3.3V, IC150 power supply
Q200 For audio muting
Q201 For audio muting
Q202 For audio muting
Q203 For audio muting
Q204 For audio muting
Q205 For audio muting
Q206 For audio muting
Q207 For audio muting
Q208 For audio muting
12
COMPONENTS DESCRIPTION
For audio signal selection (For MAIN source)
For audio signal selection (For 2-ZONE sources)
Video signal selection (For monitoring main unit)
Video signal selection (For AVOUT)
For audio signal GND isolation (LX)
For reversing resetting signal
Buffer for remote control signal for NAVI
Comes on when TUNER source is selected
Goes OFF when STANDBY source is selected
Controlling P-CONT circuit
Controlling P-CONT circuit
Comes ON power supply voltage is about 8.8V or more
Control of external amplifier
Comes ON when Q15 is ON
Comes ON when power supply voltage is about 20V or more
Comes ON when Q51 is ON
Comes ON when SW14V is ON
Comes on at P-ON
Comes ON when SW14V is ON
BU14V → 8V for audio is supplied
Comes ON when SW14V is ON
Comes ON at P-ON
BU5V → SW5V is supplied
BU14V → 5V for video is supplied
Comes ON when SW14V is ON
Electric current control of SVR voltage reduction circuit
Power supply to IC150, voltage supply to Q151
Audio muting of pre-out front right channel
Audio muting of pre-out front left channel
Audio muting of pre-out rear left channel
Muting at momentary power down, resetting, and audio mute timing
Audio muting of pre-out rear right channel
Audio muting of pre-out center channel
Audio muting of pre-out sub-woofer channel
Audio muting of AVOUT right channel
Muting at momentary power down, resetting, and audio mute timing
Operation / Condition / Compatibility