KDC-W8534/W8534Y
KDC-X790
4
COMPONENTS DESCRIPTION
Ref. No.
Application / Function
Operation / Condition / Compatibility
Q41,43,44
Illumination AVR
When Q43’ 2pin goes Hi, Ill AVR outputs 10.5V.
Q50~52
SW16V (Surge Protection)
When Q51’ 2pin goes Hi, SW16V outputs 13V.
Q60
VFD (4.7V) AVR SW
When base goes Hi, VFD AVR off.
Q61
Switching Regulator frequency control SW (IC60)
Q62
Mecha digital AVR SW
When base goes Hi, Mecha digital AVR off.
∗
DXM-680x : 4V, Other : 5V
Q63
VFD (4.7V) AVR Switching Power Driver
This FET is governed by IC60.
Frequency is decided at Q61.
Q64
Mecha digital AVR Power Driver
This FET is governed by IC60.
Frequency is fixed 400kHz.
Q80,81
VFD (57V) AVR SW
When Q81’ base goes Hi, VFD (57V) AVR outputs 57V.
Q91
Panel5V Discharge SW
When Q91’ base goes Hi, Panel5V is discharged.
Q100,101
Panel Detect SW
When Q100’ base goes Lo, panel is detected.
Q200,201
Pre-out mute driver
When a base gose Lo, mute driver is turned on.
Q202
Acc Detect SW
When Q202’ base gose Hi, Acc voltage is detected.
Q204
Surge Detect SW
When Q204’ base goes Hi, IC750 is changed into a standby state.
Q205
B.U Detected SW
When Q35’ base gose Hi, B.U voltage is detected.
Q206
Ext Amp Control Buffer
It is buffer for IC102 output.
Q207
Small-lamp Detect SW
When Q207’ base goes Hi, Small-lamp is detected.
Q208,209
Power Antenna SW
When Q206’ base goes Hi, power antenna switch outputs 14V.
Q300
DSP mute SW
When base goes Lo, DSP is set to mute.
Q402,403
AM+B SW
When Q403’ base gose Hi, AM+B is outputs.
DSI lights when the base is “L”.
Q450
DSI Driver
DSI turns off when the base is “H”.
DSI turns on and off when panel is taken off.
Q600~602
Pre-Amp +9V AVR
Q600 and 602 works as a differential amplifier,
Q601 works as a driver and +9.4V is supplied to OP Amp for Pre-out.
Q603~605
Pre-Amp -9V AVR
Q603 and 605 works as a differential amplifier,
Q604 works as a driver and -9.1V is supplied to OP Amp for Pre-out.
Q606,607
AUDIO 10.5V AVR
When Q606’ base goes Hi, AVR outputs 10.5V.
Q608~613
Pre-out mute SW
When a base gose Hi, Pre-out is set to mute.
Q800,802
REF+B AVR
When Q800’ base goes Hi, AVR outputs 13V.
Q801
SVR6.8V Ref Supply AGC Controller
When the voltage of B.U voltage falls, a return is hung and an output
is reduced.
1pin
2pin
L
H
L
400kHz
600kHz
H
650kHz
850kHz