Agilent Technologies 8720E Series Service Guide

sb530e
A15 PRE
REGULATOR
+25V
+5VD
P/O
A15W1
11,12
3,4
7,8
9,10
5,6
18,19
48,49
22,23
52,53
A22
DISPLAY
INTERFACE
A17
MOTHER-
BOARD
A8 POST-REGULATOR BLOCK DIAGRAM
FILTER
FILTER
FILTER
FILTER
FILTER
FILTER
REG
REG
REG
REG
REG
REG
REG
TO
FAN
DRIVE
TO
FAN
DRIVE
A8J2
A8P1
+
A17J2
3
1
2
5
6
W37
SHUTDOWN CAUSES:
l EXCESSIVE CURRENT
l OVER VOLTAGE
l UNDER VOLTAGE
l OVER TEMP
SHUTDOWN DISABLE: SDIS-AGND
OVER TEMP
AIRFLOW
TEMP
FAN
DRIVE
TO
FAN
TO A9
CPU
STATUS
12.5V p-p
SHUTDOWN
+18V
-18V
TP4
SDIS
TP3
+5VD
+5VDSP
-12.6V p-p
TO STATUS
TP6
TP5
-15V
-5.2V
TP9
TP2
AGND
+5VU
+5VA
TP8
+7.5V
+6V
TP11
+15V
+15V p-p
+15VSRC
TP7
+22V
TP10
+18V
+8V
-8V
-18V
A15 PREREGULATOR BLOCK DIAGRAM
LINE POWER
SWITCH
RECTIFIER
RECTIFIER
RECTIFIER
RECTIFIER
RECTIFIER
RECTIFIER
LINE
NEUTRAL
GROUND
120V
120V
120V
220V
220V
220V
+10V BIAS SUPPLY
+10V BIAS
+10V BIAS
TEMPERATURE SENSE
GREEN LED
(NORMALLY ON)
SHUTDOWN
CIRCUITRY
SHUTDOWN SIGNALS:
l EXCESSIVE CURRENT
l OVER VOLTAGE (LINE)
l UNDER VOLTAGE (LINE)
l AMBIENT TEMPERATURE INSIDE
°
PREREGULATOR CASTING > 85 C
OVER
CURRENT
SENSE
CONTROL
CIRCUIT
LSHDN
+5V
SHUTDOWN
RED LED
(NORMALLY OFF)
GNDSENSE
+5VDSENSE
90
93
3
3
0
0
1
1
94
92
92
97
97
96
95
95
3 or 2
6
A15W1P2
A15W1P2
LSHDN
A15W1P1
NC
NC
NC
A17
MOTHERBOARD
A17J3
A17XA8J1
A17 MOTHERBOARD
GNDDSENSE
+5VDSENSE
+5VD
GNDA
GNDA
RET CPU
GNDD
+5VCPU
2
5
4
6
10
9
1
3
A17XA8J
A17J3
A8 POST
REGULATOR
A8P1
LSSHDN
11
12
22,23
52,53
18,19
48,49
A8P1
+5VCPU
RET CPU
A8J2
+25V
+18V
-18V
+8V
-8V
3
1
2
9
10
8
7
6
5
4
3
0
0
-
-
+
+
POWER SUPPLY BLOCK DIAGRAM
8719/20/22ET/ES
POWER SUPPLY BLOCK DIAGRAM
8719/20/22ET/ES
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Agilent Technologies 8720E Series Specifications

General

Brand	Agilent Technologies
Model	8720E Series
Category	Measuring Instruments
Language	English