Cambridge Audio 840A - Power Amplifier Right PCB; Power Amplifier Right Schematics

Cambridge Audio Azur 840A Amplifier
AP16373/4 Power Amplifier (Right) Power Supplies & PSU PCB Schematic
TO MAIN TRANSFORMER
J1
BLUE/WHITE
J2
BROWN/BLACK
C11
X1 10n
C12
X1 10n
C13
X2 470N SUPPRESSION
F2
20MM T1AL
F3
20MM T1AL
D15
1N4002
D16
1N4002
D17
1N4002
D18
1N4002
J3
TERMINAL
BLACK
J4
TERMINAL
GREEN
J5
TERMINAL
GREY
C15
470u 35V
VI
1
VO
3
GND
2
U2
7805
C16
47u 16V
VI
1
VO
3
GND
2
U3
7815
VI
2
VO
3
GND
1
U4
7915
C18
100u 25V
C19
100u 25V
+5V PSU
C20
100nF ceramic
PSU GND
+15V
-15V
PSU GND
MAINS ON/OFF RELAY
OPAMP SUPPLY
MICROCONTROLLER SUPPLY
TO POWER AMP SUPPLY LEFT
C23
X2 470N SUPPRESSION
ALTERNATIVE POSITIONS FOR
X-CAPS WITH DIFFERENT LEAD PITCHES
LIVE
NEUTRAL
+9V PSU
INRUSH CONTROLM AINS ON/OFF
+9V PSU
INRUSH CONTROL RELAY
C24
4700u 16V
RED
ORANGE
YELLOW
BROWN
BLUE
1
2
3
1
2
36 V
36 V
0V
117 DEG C
Primary
Secondary
230 V
0 V
GREEN
4 38 V
5.5A
5.5A
100 mA
RED
ORANGE
YELLOW
1
2
3
36 V
36 V
0V
Secondary
GREEN
4
38 V
5.5A
5.5A
100 mA
J6
TERMINAL
YELLOW
GREEN
VIOLET
BROWN
BLUE
3
4
5
1
2
17 V
17 V
0V
113 DEG C
Primary
Secondary 2
230 V
0 V
100mA
100mA
RED
ORANGE
1
2
7.5 V
0V
Secondary 1
500mA
RELAY SUPPLY
J7
TERMINAL
F4
20MM T1AL
D19
1N4002
D20
1N4002
D21
1N4002
D22
1N4002
MAIN TRANSFORMER
STANDBY TRANSFORMER
J8
TERMINAL
J9
TERMINAL
C25
15000uF-63V
C26
15000uF-63V
+48V R
-48V R
J10
TERMINAL
J11
TERMINAL
J12
TERMINAL
ORANGE
BLACK
RED
J13
TERMINAL
D23
1N4002
C27
1000uF-50V
F7
T1A AL
LVD!
-51V R
POWER AMP SUPPLY RIGHT
3/6
4/5
RL3:B
ME14FW009HS
3/64/5
RL4:B
ME14FW009HS
1
2
RL3:A
ME14FW009HS
1
2
RL4:A
ME14FW009HS
R78
10R 10W WW
5
6
7
U1:B
LM393
D24
1N4002
MAINS FAIL IN
+5V IN
LOW = NORMAL
R79
4K7
R80
2K2
R81
33K
C28
4U7 50V
+310 mV
MAINS FAIL
MAINS FAIL DETECT
(SEPARATE PCB)
MAINS ON/OFF
INRUSH
+15V
-15V
+15V
-15V
1
2
3
4
5
6
7
8
9
10
11
12
CN2
FFC 12WAY
PSU GND
C29
X1 10n
C30
X1 10n
C34
X1 10n
C35
X1 10n
C36
X1 10n
C37
X1 10n
F1
T6A3 AL
LVD!
6A3 for 230V
10A for 115V
J24
BROWN
LIVE
GROUND
NEUTRAL
MAINS IN
L
N
E
CN3
IEC-SOC
J25
BROWN
MAINS IN
LIVE
CHASSIS GND
PSU PCB
PSU PCB
PSU GND
+5V PSU
+9V
0V
TO SHEET 1
R87
47K
J26
BROWN
J27
BROWN
NEUTRAL
NEUTRAL
D9
1N4001
D25
1N4001
R88
33R 1W
C17
220uF 100V
MAINS SWITCH
ON REAR PANEL
+48V IN
-48V IN
0V IN
FROM RECTIFIER BOARD
C32
100nF ceramic
C22
100nF ceramic
C31
100nF ceramic
C33
4700u 16V
R95
2R2 0.5W
+600 mV
R77
10K
AC
AC
MAINS FAIL IN
PSU GND
R96
100K
MAINS FAIL RECTIFIER
GREEN
C14
1000U 35V EL
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