McIntosh C2500 Service Manual page 35

9 TUBE
751461 SCH 2 of 3
LEFT MC
J8:3 4A
J8:2 4A
RIGHT MC
J2:2 4A
TUBE PREAMPLIFIER
J7:1
C19
47pF
GND
J7:2
RIGHT
PHONO AMP
J7:3
C20
47pF
65
C2500
157V
C57
10pF
145V
157V
R33
475k R41
C23
267k
.047µF
3
86V
0V
0V
2 7
V3:2
V3:1 12AX7A
12AX7A
R37
.6V
2.21M
.9V
R39 C59
100µF
4.75k
R35 R42
75k 1M
C25
C27
.001uF
.0033µF
C21 R30
100µF 6.49k .5 %
157V
C58
10pF
145V 157V
R34 R43
475k C24 267k
.047µF
3
86V
0V V4:1
V4:2
12AX7A
2 7
12AX7A
R38
2.21M .6V
.9V
R40
C60
4.75k
100µF
R36 R44
75k 1M
C26
C28
.001uF .0033µF
C22 R32
100µF 6.49k .5 %
R47
33.2k
LEFT
PHONO AMP
C31
1µF
R89
L MC OUT
J4:12
105V 1k
Q3
#132352
R48
10k
18V
GND
J4:10
GND
J4:6
MC-OUT-GND
(SHEILD ONLY)
RIGHT
R49
PHONO AMP
33.2k
C32
1µF
R86
R MC OUT
J4:8
105V
1k
Q4
#132352
R50
10k
18V
66
2B J2:8
2B J2:3
2B J2:4
2B J2:6