3
KAC-8404
COMPONENTS DESCRIPTION
ADJUSTMENT
No.
ITEM
ALIGNMENT POINT
METHOD
ALIGN FOR
NOTE
1
IDEL CURRENT
VR5 (A-Lch)
VR6 (A-Rch)
VR7 (B-Lch)
VR8 (B-Rch)
Connet a DC voltmeter
between check land
(Refer to a fi gure)
2.5mV
After Power on 5minutes
●
PREAMPLIFIER UNIT (X08-4430-10)
Ref. No.
Application/Function
IC1-3
HPF, LPF
IC4
Reverse circuit
IC5,7
Bass Boost
IC6,8,9
HPF, LPF
IC10
Attenuator circuit
Q301,302,315,316,
Q401,402,415,416
Attenuator circuit
Q303,304,403,404
Mute circuit
Q305-308,Q405-408
Differential circuit (First stage)
Q309,310,313,314,
Q409,410,413,414
Differential circuit (Second stage)
Q311,312,411,412
Current mirror
Q701-704
DC protection
Q705-708
Shock noise mute
Q709
Over current detection
Q710
Stabilized power supply
●
AUDIO UNIT (X09-8740-10)
Ref. No.
Application/Function
IC1-4
Isolation circuit
IC5
DC-DC IC
Q1,2
Switch
Q3-6
Gate driver
Q7-10
DC/DC comparator
Q11,12
Constant voltage circuit
Q301,302,401,402
Temperature compensation
Q303-306,Q403-406
Over current detection
Q307-310,Q407-410
Darlington
Q311-314,Q411-414
Final stage
Q701
Voltage supply
Q702
Over voltage detection
Q703
P-CON
Q704,705
Mute driver
Q706
Shock noise mute driver
Q707,708
Auto P-CON driver
VR8
VR7 VR6
VR5
X08-443 (B/2)
Q311
Q313
Q312
Q314
R319
W98
DC voltmeter
A-Lch 2.5mV
+
-
W83
R320
DC voltmeter
A-Rch 2.5mV
Q413
Q411
Q412
Q414
B-Rch
A-Rch
B-Lch
A-Lch
+
-
-
+
DC voltmeter
B-Lch 2.5mV
W8
W45
R420
R419
DC voltmeter
B-Rch 2.5mV
-
+
