Bruker BVT3000 - Page 60

60 (67) BRUKER BVT3000 Version 003
Figure 6.7. Main board - sheet 7/7
CPU SIDE
BCU05 CONNECTOR
1
2
3
J4
CN MKK03 D
TO PORT 4
1
2
3
U1A
74LS32
R4
100R
EVAPORATOR HEATER STATUS
IN0
I_EVAP_STAT
I_VALVE
PLP7
PLP6
PLP5
PLP4
PLP3
PLP2
PLP1
PLP0
+15P
2
3
4
5
6
7
8
9
1
RP5
RS8A/2K7
+15P
DGND
+5V
VCC
from sheet 1
CPUVCC
CPUGND
+15P
PGND
-15P
+24V
VDD
VSS
+24V
from sheet 3
VALVE_EXCH-
EVAP_STAT-
R20
10K
R26
10K
+15P
+15P
3
2
1
U41A
LM358
5
6
7
U41B
LM358
VREF
1
28
7
U32A
MCT6
4
35
6
U32B
MCT6
R24
2K74
R21
2K74
2 3456789
1
RP3
RS8A/4K7
from sheet 4
READ STROBE
VCC
1
19
2
4
6
8
11
13
15
17
18
16
14
12
9
7
5
3
U23
74HCT244
RDPORT3-
D[0..7]
to sheet 4
CPU DATA BUS
D[0..7]
HEATER ON
OVERHEATING
EXCHANGER CONNECTED
NO GAS
EVAPORATOR CONNECTED
LN2 REFILL
BOOSTER CONNECTED
LN2 EMPTY
D0
D1
D2
D3
D4
D5
D6
D7
IN0
IN1
IN2
IN3
IN4
IN5
IN6
IN7
IN0
IN1
1
28
7
U33A
MCT6
4
35
6
U33B
MCT6
1
28
7
U34A
MCT6
PLP0
PLP1
3
2
1
U42A
LM324
5
6
7
U42B
LM324
R27
10K
from sheet 6
HEATER POWER ON
from sheet 2
HEATER_RLY
BOOSTER_CONN-
LIGHT OVERHEATING
NO GAS FLOW
from sheet 3
NO_GAS
OVERHEAT
EVAP_CONN-
+15P
10
9
8
U42C
LM324
12
13
14
U42D
LM324
3
2
1
U43A
LM324
4
35
6
U34B
MCT6
1
28
7
U35A
MCT6
PLP2
PLP3
PLP4
2 3456789
1
RP2
4.7k
IN2
IN3
IN4
READ PORT3 - C000h
from sheet 4
READ STROBE
from sheet 6
SDA
VCC
1
19
2
4
6
8
11
13
15
17
18
16
14
12
9
7
5
3
U22
74HCT244
RDPORT4-
UNUSED
EVAPORATOR ON
VALVE1
VALVE2
VALVE3
VALVE4
EXCHANGER VALVE CLOSED
D0
D1
D2
D3
D4
D5
D6
D7
JP6 JP7 JP8 JP9
I_EVAP_STAT
I_VALVE
IN5
IN6
4
35
6
U35B
MCT6
1
28
7
U36A
MCT6
PLP5
PLP6
5
6
7
U43B
LM324
10
9
8
U43C
LM324
R28
10K
R37
10K
+15P
+15P
from sheet 3
EXCH_CONN-
REFILL-
12
13
14
U43D
LM324
4
35
6
U36B
MCT6
PLP7
0
1
V4
IN7
READ PORT4 - E000h
0
1
V3 V2 V1
THE GAS FLOW AT POWER ON
THE JUMPERS PRESET
EVAP_CONN-
EXCH_CONN-
LN2_EMPTY-
to sheet 3
C10
100nF
VCC
74HCT244 BYPASS CAPACITOR
C34
100nF
VCC
VDD = pin 8
VDD = pin 4
DGND = pin 10
VCC = pin 20
GND = pin 4
GND = pin 11
IC SUPPLIES:
74HCT244:
LM358:
LM324:
C36C35
+15P
C41
1
2
3
4
5
6
7
8
9
10
11
12
13
14
J13
6410-14
EVAP_CONN-
LN2_EMPTY-
EXCH_CONN-
REFILL-
EVAP_STAT-
+15P
-15P
from sheet 6
EVAP_ON-
from sheet 3
DAC
VALVE_EXCH-
OPTION CONNECTOR
+24V
LM358, LM324
3X100nF BYPASS CAPACITORS
ART: W1101113
MAIN BOARD
BVT3x00
DRAWN:
DATE:
APPROV:
DATE:
DWG:
EC: VISA:
VISA:
SHEET:E
W4S11 0282
AKL
10/02/95
PK
10/02/95
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