McIntosh C2500 Service Manual

55
56
7
BACKUP PS 751185 SCH
1
1
1
GRY
BLU
BLK
300mA
t
R1
D3
D4
D2
D5
1
1
1
WHT
ORG
VIO
1
1
AC N
AC LINE
7
7
7
7
7
D1
J5:2
J5:1
3
POWER
RLY
2
6
8
4
1
3
5
7
PRIMARY
T1
+VBU
GND
J5:3
+VBU
+VBU
7
300mA
t
R2
3300uF
C1
J6:1
J6:2
[+] TP [-]
TEST ONLY
NO CONNECTION
J4:4
J4:3
J4:5
J4:2
J4:1
J4:6
F1
3300uF
C2
AC LINE FILTER
N
L
G
1 6
2
5 4
3
K1
!
!
!
!
!
!
!
J1:3
J1:2
J1:1
J1:4
J1:5
J1:6
! ! !
VOLTAGE SELECTION JUMPERS
240V
220V
120V
100V
100V
120V
230V
110V
110V
POWER TRANSFORMER PRIMARY
!
J2:1
J2:2
3
3
100V 50/60Hz
110-120V 50/60Hz
089141 T800mAL
220-240V 50/60Hz 089126 T500mAL
089132 T1AL
T1
TO CONTROL PCB
J24:3
J24:2
J24:1

McIntosh C2500 Specifications

General

Total Harmonic Distortion	0.08%
Signal to Noise Ratio	100dB
Rated Output Voltage	2.5V unbalanced, 5V balanced
Maximum Output Voltage	8V unbalanced, 16V balanced
High Level Voltage Gain	15dB
Type	Vacuum Tube Preamplifier
Inputs	6 unbalanced, 2 balanced, 1 phono MC, 1 phono MM
Outputs	3 unbalanced, 2 balanced
Weight	29 lbs (13.2 kg)
Input Impedance	47k ohms
Phono Voltage Gain	40dB (MM), 60dB (MC)
Frequency Response	+0, -0.5dB from 20Hz to 20, 000Hz +0, -3dB from 10Hz to 100, 000Hz