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)
L
400kHz
600kHz
H
650kHz
850kHz
