Service manual

alsa apparecchi medicali s.r.l.
alsa code: 801301
EXCELL 400 MCDS
Rev: 4A.2 29/Mar/99
Approval:
Drawn by:
BIS_O95P Power Supply Board
+15V
+15V
+15V
-15V
+15V
VREG
SEC. ISOLATO
PER ALIM.
PEDALI
GND
+15V
INTIIA
SDA
SCL
PWRBLK
PWRBLK PWROFF
PWROFF
PWRAUD
ENALIM
ENALIM
ENMON
ENMON
ENARG
ISOCUT
ISOCOG
ISOBCT
ISOBCG
HT
TERM2
TERM2
ISOBCG
ISOBCT
ISOCOG
ISOCUT
HT
GND
+15V
TO RF
POWER STAGE
FROM BRIDGE RECTIFIER
(ON THE HEATSINK)
BIPOLAR
PEDAL
MONOPOLAR
PEDAL
TO uP2 &
PANEL BOARD
TRANSFORMER
FROM MAIN
VDC
VSS
TP1 TP2
TP3
TP4
TP5
TP6
TP8
TP9
BIP
MON
MON. MIN.
MIN.
BIP. B
A
B
A
ENARG
VDD
VSS
ARGON
INPUT
ARGIN
PEDBCG
PEDBCT
PEDCGM
PEDCTM
+15V
-15V
GND
+5V
GND
INTIIA
GND
PWRAUD
GND
+5V +5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
-15V
PEDSCM
-15V
GND
+15V
+5V
I_ALIM
+15V
-15V
I_ALIM
From Main
Transformer
To R.F. Main Board
To uP1
F3
F5
Q1
F2
F4
L3
3
5
4
U1B
1
13
2
U1A
10
12
11
U1D
8
6
9
U1C
2 1
3
U2
CT
5
RT
6
VREF
16
SYNC
3
NI INP
2
INV INP
1
COMP
9
SS
8
DIS
7
OSC.OUT
4
GND
12
SHUNT
10
OUT B
14
+VIN
15
VC
13
OUT A
11
U3
Q2
Q3
Q4
Q5
Q6
Q8
Q9
D1
D2
D3
D4
D5
D6
D8
D9
D10
-+
D13
J1
J2
L4
J3
J4
J5
J6
J8
J9
1
2
3
4
5
J10
1
2
3
4
5
J11
J15
J16
D7
-+
D11
-+
D12
Q7
R1
R2
R3
R7
R8
R9
R10
R15
R16 R17
R18
R19
R20
R21
R22
R23
R24
R25 R26
R27
R28
R29
R30
R31
R32
R33
R34
R35
R36
R37
R38
R39
R40 R41
R42
R43
R44
R45
R46
R47
R48
R49
R50
R51
R52
R53
R54
R55
R56
R57
R58
R59
R60
R63
R64
R65
R66
R74
R78
R80
R81
R82
R83
R84
R85
R86
R87
R88
R89
R90
R91
R92
R93
R94
R95
R96
R97
R98
R99
R100
R101
R102
R104
R105
C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
C11
C12
C13
C14
C15
C16
C17
C19 C20
C21 C22
C23
C24 C25 C26 C27
C28 C29 C30 C31
C32
C33
C34 C35
C36
C39
C41
C42
C43
C44
C45
C46
C47
C48
C49
C50
C51
C52
C53
C54
C55
C56
C57
C58
C59 C60
C61 C62
C63 C64 C65
C66 C67 C68
C69 C70 C72
INT
13
A0
1
A1
2
SCL
14
SDA
15
A2
3
P0
4
P1
5
P2
6
P3
7
P4
9
P5
10
P6
11
P7
12
U5
12
3 4 5
6
U6
12
3 4 5
6
U7
12
3 4 5
6
U8
12
3 4 5
6
U9
12
3 4 5
6
U10
VI
GND
VO
U11
VI
GND
VO
U13
R72
C37
C38
R73
3
2
1 5
6
74
+
-
U4
C73
C71
R103
R67
R69
R68
R76
R77
1
3
2
4
J19
1
3
2
4
J20
1
3
2
4
J17
R61
R62
6
1
5
2
3
4
T1
VI
GND
VO
U12
*
AL1
1
2
3
J12
1
2
3
J13
1
2
3
J14
R79
R5
R4
R6
R11
R12
R13
R14
R70 R71
R75
C40
C18
1
3
5
2
4
6
7
8
9
10
11
12
13
14
J18
F1
A
B
C
D
E
F
b1