4
KDC-MP828/W7531/W7531Y/W8531
/W8531Y/X789/X8529/X889
COMPONENTS DESCRIPTION
Ref. No. Application / Function Operation / Condition
Q60 VFD (4.7V) AVR SW When base is “H”, VFD AVR is turned “OFF”
SWITCHING REGULATOR FREQUENCY
Q61 CONTROL SW (IC60)
Q62 MECHA DIGITAL AVR SW When base is “H”, MECHA DIGITAL AVR is turned “OFF”
Q63 VFD (4.7V) AVR SWITCHING POWER DRIVER Controlled by IC60 and Q61 determines frequency
Q64 MECHA DIGITAL AVR POWER DRIVER Controlled by IC60 (Frequency is fixed to 400kHz)
Q80,81 VFD (57V) AVR SW When Q81 base is “H”, VFD (57V) is output
Q91 PANEL5V DISCHARGE SW When base is “H”, PANEL5V is discharged
Q100,101 PANEL DETECT SW When Q100 base is “L”, panel is detected
Q200,201 PREOUT MUTE DRIVER When base is “L”, MUTE DRIVER is turned “ON”
Q202 ACC DETECT SW When base is “H”, ACC voltage is detected
Q203,204 SERGE DETECT SW When Q204 base is “H”, IC750 (POWER IC) is turned to standby.
Q205 BU DETECT SW When Q35 base is “H”, backup voltage is detected
Q206 EXT AMP CONTROL BUFFER Output buffer from IC102 (µ-COM)
Q207 SMALL LAMP DETECT SW When base is “H”, small lamp is detected
Q208,209 POWER ANTENNA SW Q206 base is “H”, 14V POWER ANTENNA voltage is output
Q300 DSP MUTE SW When base is “L”, DSP is muted
Q402,403 AM+B SW When Q403 base is “H”, AM+B is output
Q450 DSI DRIVER When base is “H”, DSI is turned “ON”. When base is “L”, DSI is
turned “OFF”. When panel is off, DSI blinks.
Q500 SPECTRUM ANALYZER AGC CONTROLLER
When excess input is made, feed-back is interrupted which slows down output.
Q600~602
PRE-AMP +9V AVR Q600 and Q602 function as differential amplifier.
Q601 functions as a driver and +9.4V is supplied to op amp for pre-out.
Q603~605
PRE-AMP -9V AVR Q603 and Q605 function as differential amplifier.
Q604 functions as a driver and –9.1V is supplied to op amp for pre-out.
Q606,607 AUDIO 10.5V AVR When Q606 base is “H”, 10.5V is output
Q608~613
PREOUT MUTE SW When base is “H”, pre-out is muted
Q800,802 REF+B AVR When Q800 base is “H”, 13V is output
Q801 SVR6.8V REF SUPPLY AGC CONTROLLER
When backup voltage is down, feed-back is interrupted which slows down output.
●SWITCH UNIT (X16-2950-1x / X16-3122-71)
Ref. No. Application / Function Operation / Condition
IC1 ROM IC / FLASH ROM IC Display image data storage
IC2 SPECTRUM ANALYZER 6-ch band pass filter
IC4 PANEL µ-COM
IC5 RESET IC Functions when panel is attached
IC6 REMOTE CONTROL
IC7 LEVEL SHIFT Conversion from 5V level to 3.3V
IC8 LEVEL SHIFT Conversion from 3.3V level to 5V
F SEL2 (BASE)
F SEL1 LH
(BASE) L400kHz 600kHz
H650kHz 850kHz
w
w
w
.
x
i
a
o
y
u
1
6
3
.
c
o
m
Q
Q
3
7
6
3
1
5
1
5
0
9
9
2
8
9
4
2
9
8
T
E
L
1
3
9
4
2
2
9
6
5
1
3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
