KAC-6403
4
Ref. No
Application / Function
Operation / Condition / Compatibility
D203,204
Current mirror
Current mirror load for 2nd deferential amplifier.
D205,206
B-class stage mute
Prevents reverse flow.
D207~211
Over-current DET
Prevents reverse flow.
D601
LED control
Controls D610’s power indicator.
D602,603
Mute control
Prevents reverse flow.
D604
Mute AVR
10V
D605
Power control
Prevents reverse flow.
D606
Over-current DET
Level shift for primary power supply.
D607
Power control
Level shift
D608
Mute control
Being controlled by Q602.
D610
LED
Being controlled by Q602.
D613,614
DC protection
Operates when DC is output.
D616
POP mute
COMPONENTS DESCRIPTION
No.
Item
Alignment Point
Method
Align for
Note
Fig.
Connect a DC voltmeter between
VR5 (A-Lch)
the following emitter resistors.
PC BOARD
1
IDEL CURRENT
VR6 (A-Rch)
R253 (A-Lch)
2.5mV
Over 5 minutes
on page 6
VR7 (B-Lch)
R254 (A-Rch)
aging is required.
and 7.
VR8 (B-Rch)
R453 (B-Lch)
R454 (B-Rch)
ADJUSTMENT
