KAC-6202
3
COMPONENTS DESCRIPTION
ADJUSTMENT
No.
Item
Alignment point
Method
Align for
Note
1
IDLE
VR3 (Lch)
Connect a DC voltmeter
2.5mV
After Power on
CURRENT
VR4 (Rch)
between emitter resister
5 minutes
R278
R277
Q225
Q223
VR3
Lch
Q226
Q224
Rch
VR4
MIN
MAX
MIN
MAX
DC voltmeter
Lch 2.5mV
DC voltmeter
Rch 2.5mV
Ref. No.
Application / Function
Operation / Condition / Compatibility
Q609
Switching
For PULL-DOWN of DC/DC converter 2 pin
Q610~614
Switching
Transistor for power supply circuit ON/OFF control
Q615
Switching
Transistor for mute ON/OFF control for latter steps
D1
Circuit protection diode
For circuit protection at reverse connection of power supply cord
D4~7
Switching
Backflow prevention diode
D8,9
Rectifying diode
Rectification on the secondary power supply side
D101~103
Static protection diode
For circuit protection against static
D201
Switching
Backflow prevention diode
D202,203
Operation stabilizer diode
Contains thermal fluctuation of transistor Vbe of second step differentiation
D204,205
Current mirror load
Current mirror circuit load
D206~211
Switching
Backflow prevention diode
D501
Indicator LED
Indicator for behavior visual check
D601
Bias diode
Backflow prevention diode
D602,606
Switching
Backflow prevention diode
D603
Level shifter
For DC protection circuit bias
D604
Switching
For turning operation off at P-CON momentary power down
D605
Switching
For turning off operation at BATT excess voltage and for circuit protection
D607
Level shifter
For bias of the mute control circuit
D608~612
Switching
Backflow prevention diode
