McIntosh MC1.25KW - Page 7

MC1.25KW
MAIN 752035 SCH 1 OF 3
2
9 10
[+]
Main-Power Supply
2
1
1
1
BLU
GRN
BLU
D19
D20
D21
D22
5V
+5V
AC DETECTOR
0V
4
2
1
3
Vcc
GND
5
U26
+5V
150k
R75
AC DET
1
1
AC N
AC F
VIO
WHT/VIO
WHT
BLK
BLK/GRY
GRY
110V/120V
A
B
C
D
E
G
H
I
J
F
BLU
GRN
BLU
WHT
BLK
D18
TEST ONLY
NO CONNECTION
APPLY 12VDC
TO ENERGIZE RELAYS
WITH NO AC POWER
+5VHS2
150k
R77
1
1
1
1
1
1
1
1
1
1
+5V
[-]
BRN
BRN
12V .3V
-26V
26V
+5V
+5V
T PTC
THERMAL
PROTECTION
TRANSFORMER
5V
ORN
ORN
GND
T PTC
1
1
+5V
IN OU T(TAB)
ADJ
1
23
U28
475
R78
4.75k
R82
475
R79
4.75k
R83
IN(TAB) OUT
ADJ
1
2 3
U29
220µF
C38
220µF
C39
+17V
-17V
10µF
C35
10µF
C37
PWR RLY
+12V
+12V
10k
R69
1.2k
R80
1.2k
R81
26V
-26V
350mA
t
R68
100µF
C36
IN
ON/OFF
OUT
GND ADJ
___
TAB
1
6
2
3
4 5
U27
.047µF
C27
.01µF
C34
.15µF
C24
3300µF
C30
3300µF
C31
3300µF
C32
J11:1
J11:2
J12
J13
J20
J21
J22
J23
J14
J15
J16
J17
J18
J19
1.1A
t
R72
t
R73
2
6
8
4
1
3
5
7
PRIMARY
T2
47.5k
R76
100k
R71
3
1
2
Q20
3
1
2
Q21
.1µF
C29
.1µF
C28
.1µF
C33
J1:1
J1:4
J1:7
J1:10
J2:1
J2:4
J2:10
JMP1
173085
100V
110V
120V
220V
230V
240V
D23
D26
D25
D24
2.5
NTC
RT1
2.5
NTC
RT2
J24
J25
J26
J27
J28
4
2
1
3
Vcc
GND
5
U25
2 3
1 4
K1
23
14
K2
.47µF
C26
68.1k
R86