McIntosh MC462

MC462
MAIN 752270 SCH 3 of 3
2
+5V
MET ER LIGH T
CON TR OL
22.1k
R7
3.92k
R1
3.92k
R13
.6V
5V
4
2
1
3 5
Vcc
GND
U1
+5V
PANEL LIGH T
CONTROL
.6V 5V
0V
0V
+5V
5V
5V
4
2
1
3 5
Vcc
U9
+5V
T PTC
PWR RLY
1.82k
R22
+5V
5V
DRIVER
RELAY
POW ER
D4
AC DET
4
2
1
3 5
Vcc
U11
+5V
10µF
C7
PGN D
4
2
1
3
Vcc
GND
5
U14
+5V
332k
R24
-18V
150k
R29
22.1k
R34
22.1k
R33
22.1k
R37
22.1k
R38
150k
R30
12
3
G
D
S
Q8
4
2
1
3
Vcc
GN D
5
U20
4
2
1
3
Vc c
GND
5
U19
+5V
+5V
+5V
+5V
+5V
+5V
5V
5V
+5V
PR OT EC TION
5V
AM PLI FIER
MUTIN G
THER MAL
HEAT SINK
150k
R25
+5V
+5V
5V
PG LIGH T
DRIVER S
2.21M
R21
0V
4
2
1
3
Vcc
GND
5
U10
+5V
PC OU TPU T
DELAY
4
2 1
3
Vcc
GND
5
U15
+5V PGN D
0V
D3
-15V
0V
.6V
TURN ON
DELAY
150k
R31
22.1k
R36
22.1k
R35
22.1k
R39
22.1k
R40
150k
R32
4
2
1
3
Vcc
GND
5
U22
4
2
1
3
Vcc
GND
5
U21
+5V
+5V
+5V
+5V
+5V
+5V
5V
5V
+5V
PR OT EC TION
THER MAL
HEAT SINK
+5V
4
2
1
3
Vcc
GND
5
U16
(+) PT C
-15V
+15V
+15V
-15V
MUTE
L PG
HEATS INK
7
7
7
7
7
MET ER V
L MET V
7
0V
+15V
L +PTC
DISPLAY
MUTE
5
5
LEFT INPU T
+15V
-15V
PC OU T
GND
ML REM
GND
5
5
5
5
5
PC IN
+15V
-15V
+5V
4.75k
R4
+5V
TURN ON
CON TR OL
0V
5V
4
2
1
3
Vcc
GND
5
U2
+5V
4
2
1
3
Vcc
5
U4
+5V
4.75k
R6
22.1k
R3
5V
+5V
D1
8
9
10
11
12
13
141
2
3
4
5
6
7
Q /Q SEL
Q
MODE
NC
A
B
Vdd
Vss
MR
AR
NC
Rs
Ctc
Rtc
_
U6
.22µF
C2
22.1k
R11
+5V
4
2
1
3
5
Vcc
GND
U3
4
2
1
3 5
Vcc
U7
+5V
4
2
1
3
Vc c
5
U5
+5V
+5V
AU TO OF F TIMER
22.1k
R18
AU TO OF F
DISABLED
INDICAT OR
4
2
1
3 5
Vcc
U8
+5V
+5V
AUD DET
+15V
+15V
12V
13. 2V
D2
+15V
DRIVER
PC OUTPU T
PC OU T
PWR O N
+5V
5V
ML REM
5V
5V 5V
5
R
4 3
DS1:1
47.5k
R20
1k
R23
20.0k
R16
22.1k
R15
J5:1
J5:3
J5:4
J5:5
J5:6
J5:7
22.1
R12
1k
R14
47.5k
R2
47.5k
R5
100k
R8
100k
R9
100k
R17
221k
R10
3
1
2
Q1
3
1
2
Q2
3
1
2
Q3
3
1
2
Q4
3
1
2
Q6
3
1
2
Q5
3
1
2
Q7
3
1
2
Q9
3
1
2
Q10
3
1
2
Q11
3
1
2
Q12
.1µF
C1
.1µF
C3
.1µF
C6
.1µ F
C5
.1µF
C9
.1µF
C10
.1µF
C11
.1µF
C12
.1µF
C13
B
4
2
1
3
Vcc
5
U12
4
2
1
3
Vcc
GND
5
U18
4
2
1
3
Vcc
GND
5
U17
OPEN
R27
R +PTC
L -PTC
R -PTC
L
L +PTC
MUTE
L PG
L PG
(-) PT C
-15V
+15V
+15V
-15V
MUTE
L PG
7
7
7
7
70V
J6:1
J6:3
J6:4
J6:5
J6:7
L -PTC
MUTE
L PG
(+) PT C
-15V
+15V
+15V
-15V
MUTE
R PG
7
7
7
7
7
MET ER V
R MET V
7
0V
J7:1
J7:3
J7:4
J7:5
J7:6
J7:7
R +PTC
MUTE
R PG
(-) PT C
-15V
+15V
+15V
-15V
MUTE
R PG
7
7
7
7
70V
J8:1
J8:3
J8:4
J8:5
J8:7
R -PTC
MUTE
R PG
150k
R26
+5V
+5V
5V
0V
4
2
1
3
Vcc
5
U13
R PG
L MET
R MET
FP OFF
FP O N
FP OFF
FP ON
L CAL 2
L CAL 1
R CAL 2
R CAL 1
ML REM
ML REM
L HOLD
J3:1
J3:2
J3:3
J3:4
J3:5
J3:6
J3:7
J3:8
J3:9
J3:10
J3:11
J3:12
J4:1
J4:2
J4:3
J4:4
J4:5
J4:6
J4:7
J4:8
J4:9
J4:10
J4:11
J4:12
R PG LT
PAN LTS
MET LTS
L PG LT
L PG LT
R PG LT
MET LTS
PAN LTS
J2:5
J2:2
J2:3
J2:7
J2:1
J2:4
J2:6
J1:3
J1:2
J1:1
J1:4
J1:5
J1:6
J1:7
J1:10
RIGH T INPUT
+15V
-15V
PC IN
MODE
GND
ML REM
GN D
+15V
-15V
MOD E
R HOLD
220µF
C4
10µF
C8
+5V
33.2k
R28
AU TO OF F
HEATS INKLHEATS INKRHEATS INKR
6
6
6
6
6
6
6
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
15k
R19
GND
GND
GND
GND
GND
GND
GND
GND
13 14