LTO L-12, Service Manual, Page: 13 / 77

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CH3.Sch
Titel
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Date:
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Sheet
Revision Model No:
12-Jul-2003
BOW
5 4 of
ALTO L12
VER030712
A3
PCB# L12MN2.PCB
L12MN2CH3(4/5)
R16_2
6K8
VR7_2
W50K
AUX1
R7_2
5K1
5
6
7
U2_2B
4580M
VR5_2A
10KD
R20_2
12K
C9_2
22P
VR9_2
W50K
C4_2
47u/25V
R14_2
6K8
AUX3
LEVEL
AUX-POST
R8_2
5K1
R9_2
5K1
LEFT-BUS
RIGHT-BUS
PAN
AUX-PRE
2
1
3
SW7_2A
PS-22E85L
5
4
6
SW7_2B
PS-22E85L
2
1
3
SW3_2A
PS-22E85L
5
4
6
SW3_2B
PS-22E85L
2
1
3
SW6_2A
PS-22E85L
5
4
6
SW6_2B
PS-22E85L
5
4
6
SW4_2B
PS-42E85L
2
1
3
SW4_2A
PS-42E85L
SUB1
SUB2
R10_2
5K1
R11_2
5K1
AUX1/2 PRE/POST
R5_2
10K
SOLO(PFL)
D1_2
BAS316
LOGIC
LD1_2
YEL
(SOLO)
R23_2
2K2
-VCC
(LOGIC=2.0V or 0.5V)
8
4
U1_2C
4580M
C17_2
100n
+VCC
-VCC
LOGIC
EQ HI (12K)
C7_2
6.8n(M)
VR1_2
B50K
R25_2
5K6
VR4_2
B50K
R24_2
5K6
LO (80Hz)
R4_2
10K
3
2
1
U2_2A
4580M
R19_2
1M
C6_2
22P
R18_2
3K9
VR2_2
B50K
MID (FREQ=100Hz-8K)
C11_2
33n(M)
C12_2
33n(M)
C8_2
6.8n(M)
C3_2
47u/25V
C2_2
47u/25V
INS2-CH3
INS2-CH3
3
2
1
U1_2A
4580M
5
6
7
U1_2B
4580M
R2_2
10K
R3_2
10K
C5_2
22P
C10_2
152(M)
R6_2
5K1
R1_2
3K
VR3_2B
500KC
VR3_2A
500KC
R22_2
6K2
C1_2
682(M)
R21_2
6K2
2
1
3
SW5_2A
PS-22E85L
5
4
6
SW5_2B
PS-22E85L
SUB3
SUB4
R12_2
5K1
R13_2
5K1
8
7
9
SW4_2C
PS-42E85L
11
10
12
SW4_2D
PS-42E85L
AFL-L
AFL-R
R27_2
6K8
R28_2
6K8
VR8_2
W50K
R15_2
6K8
AUX4
AUX-POST
R17_2
6K8
AUX2
VR10_2
W50K
AUX-PRE
5
4
6
SW1_2B
PS-22E85L-2
2
1
3
SW1_2A
PS-22E85L-2
LD2_2
RED
R26_2
3K3
+VCC
MUTE
2
1
3
SW2_2A
SW PS-22E85L-2
L-CUT3-OF
L-CUT3-ON
INS1-CH3
TRIM2-CH3
TRIM1-CH3
TRIM-CH3
LO-CUT-CH3
VR11_2
O10K
DIR-OUT3
8
4
U2_2C
4580M
C18_2
100n
C19_2
100n
C20_2
100n
R40_2
15K
VR6_2
W50K
R29_2
4K7
R30_2
4K7
R49_2
4K7
R47_2
10K
R46_2
10K
R45_2
10K
R41_2
100K
R42_2
100K
C21_2
1uF
R43_2
8K2
PGND PGND
PGND
PGND
LD3_2
LED-2P
TR1_2
HR
R44_2
82R
1
2
3
4
8
U4_2A
393
5
6
7
U4_2B
393
R50_2
27K
R51_2
1K
3
2
1
U3_2A
4580M
PGND
綠 紅
D2_2
4148
D3_2
4148
C22_2
1uF
PGND
D4_2
4148
PGND
+RVCC
TR2_2
7002
R48_2
10K
C23_2
470P
+RVCC
C28_2
47u/25V