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KDC-MP819/X659/Z838
3
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SWITCH UNIT (X16-168X-XX)
Ref.No.
Component Name
Application/Function
Operation/Condition/Compatibility
IC1
TAR5S33
FL AVR
+3.3V Output
IC2
TC74HC4050AFT
Buffer
For FL control lines, 5V
→
3.3V logic level shifting
IC3
RS-171
Remote sensor IC
IC4
BA3830F
BPF IC
BPF for the spectrum analyser indicator
IC5
UPD703032GFA04
Panel MI-COM.
Q1
DTA144EUA or UN5113
FL+B SW
FL & IllumiB ON/OFF control. When Q2's base goes Hi, Q1 is
turned on, and FL+B(45V) line is supplied to the FL indicator and
Q2
DTC114YUA or UN5214
the key illumination circuit.
Q3
DTA114EUA or UN5111 REMO SW
When a base goes Lo, Q3 is turned on, and PAN5V line is supplied to
IC3 and IC4.
Q4
DTC114EUA or UN5211 FL blanking SW
When a base goes Hi, Q4 is turned on, and FL indicator is lit.
Q6
DTC114YK or UN2214
SRC key illumination SW When a base goes Hi, Q6 is turned on, and SRC illumination is lit.
Q7
2SC4081
V-I converter
Current driver for green LEDs
Q8
2SC4081
V-I converter
Current driver for red LEDs
Q9
DTA114EUA or UN5111 Key illumination Red SW
When a base goes Lo, Q9 is turned on, and key illumination Red is lit.
Q10
DTA114EUA or UN5111 Key illumination Green SW
When a base goes Lo, Q10 is turned on, and key illumination Green is lit.
COMPONENT DESCRIPTION
●
ELECTRIC UNIT (X25-9240-XX)
Ref.No.
Component Name
Application/Function
Operation/Condition/Compatibility
IC1
UPD703033GFA17
System MI-COM.
IC2
TDA7407
E-VOL.& N.C. MPX
IC3
M5237ML
AVR IC
IC is combined with Q4, and it works as the error detection, the Q4's driver.
IC4
TDA7560
Power IC
IC5
TDA7401
High pass filter &
HPF(Front/Rear output), LPF, Non-Fader switching and volume function
Non-Fader volume
IC6
ICL7660SIBA
DC/DC converter
-9V AVR for pre-output amplifier
IC7
TC74HC02AF
Mute logic
2-input NOR x 4
IC8
NJM4565M-TE2
Op. amp.
Amplifier for the spectrum analyser and generation of Vref. (1/2Vcc) voltage
IC10
NJM4565M-TE2
Op. amp.
Amplifier for the front pre-outputs
IC11
NJM4565M-TE2
Op. amp.
Amplifier for the non-fader pre-outputs
IC12
NJM4565M-TE2
Op. amp.
Amplifier for the rear pre-outputs
IC16
S-80837ANNP
Reset IC
When BU 5V voltage is less than 3.7V, IC outputs Lo.
IC20
BA3121F
Isolation amplifier
AUX inputs isolation amplifier
IC21
BA3129F
Switched op.amp.
Input switching with AUX inputs and CD inputs
MECHA. AVR
DC/DC converter, +5V output for CD mechanism adapted for MP3
EEPROM
CD servo AVR
AVR for CD mechanism servo operation, +7.5V output.
SW 5V
While a base goes Lo, SW 5V is supplied to the microprocessor
peripheral circuits.
A.+8V AVR
Q4 is combined with IC3, and it works as the power supply of +8.0V output.
A.+8V AVR SW
When Q5's base goes Hi, Q6 is turned on, and A.+8V AVR is working.
SW14V
When Q8's base goes Hi, Q7 is turned on, and A.+8V AVR, CD servo
AVR and A.+10V AVR are working.
PAN5V SW
For PAN5V on/off switching. When a base goes Lo with panel attached
to the set, Q9 is turned on, and PAN5V is supplied to the panel.
Q10
2SA2057
FL/Illumination AVR
When Q11's base goes Hi, AVR o9V.
Q11
2SC4081
Q12
DTC124EUA or UN5212
FL/Illumination AVR SW
When Q12's base goes Hi, Q13 is turned on, and FL/Illumination AVR
Q13
DTA124EUA or UN5112
is working.
Q14
DTA123JK or KRA105S
EXT. AMP CON. SW
When a base goes Lo, Q14 is turned on, and control pulse signal is outputted.
Q15
DTC144EUA or UN5213 Dimmer detection SW
When vehicle small lamps turn on, Q15's base goes Hi, and it is turned on.
Q16
2SB1443
A.+10V AVR
When Q17's base goes Hi, AVR o10V.
Q17
2SC4081
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