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BENCH Series
HP BENCH Series User Manual
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SECTION
VII
CIRCUIT
DIAGRAMS
This
section
contains
the
circuit
diagrams
neces
sary
for
the
operation
and
maintenance
of
this
power
supply.
Included
are:
a.
Component
Location
Diagram,
Figure
7-1,
which
shows
the
physical
location
and
refer
ence
designator
of
parts
mounted
on
the
printed
wiring
board.
b.
Schematic
Diagram,
Figure
7-2,
which
illustrates
the
circuitry
for
the
entire
power
supply.
Voltages
are
given
adjacent
to
test
points,
identi
fied
by
encircled
numbers
on
the
schematic
and
printed
wiring
board.
7-1
33
35
Table of Contents
Table of Contents
2
DC Power Supply
5
I General Information
6
Description
6
Specifications
6
Options
6
Accessories
6
Instrument/Manual Identification
6
Ordering Additional Manuals
6
Installation
8
Initial Inspection
8
Mechanical Check
8
Electrical Check
8
Installation Data
8
Location
8
Outline Diagram
8
Rack Mounting
8
Rack Kit with Three BENCH Supplies
8
Input Power Requirements
9
Power Cable
9
Repackaging for Shipment
9
111 Operating Instructions
10
Turn-On Checkout Procedure
10
Operation
10
Constant Voltage
10
Changing Current Limit
10
Connecting Load
10
Front Panel Controls and Indicators
10
Operation of Supply Beyond Rated Output
11
Optional Operating Modes
11
Series Operation
11
Parallel Operation
11
Special Operating Considerations
11
Pulse Loading
11
Output Capacitance
11
Reverse Current Loading
11
Principles of Operation
12
Simplified Discussion
12
Simplified Schematic
12
Detailed Circuit Analysis
13
Feedback Loop
13
Series Regulator
13
Constant Voltage Input Circuit
13
Driver and Error Amplifier
14
Current Limiting Circuit
14
Reference Circuit
14
Meter Circuit
14
Vmaintenance
15
Introduction
15
Cover Removal and Replacement
15
General Measurement Technique
15
Front Panel Terminal Connections
15
Output Current Measurement
15
Test Equipment Required
16
Performance Test
17
Rated Output and Meter Accuracy
17
Load Regulation
17
Line Regulation
17
Troubl E S Hooting
17
Load Regulation, Test Setup
18
Ripple and Noise, Test Setup
19
Output Impedance
20
Noise Spike Test Setup
20
Output Impedance, Test Setup
20
Current Limit
21
Transient Recovery Time
21
Transient Recovery Time, Test Setup
21
Troubleshooting
22
Trouble Analysis
22
Transient Recovery Time, Waveforms
22
Common Troubles
23
Low Output Voltage Troubleshooting
24
Repair and Replacement
25
High Output Voltage Troubleshooting
25
Servicing Printed Wiring Boards
26
Adjustment and Calibration
27
Meter Mechanical Zero
27
Meter Calibration
27
Zero Volts Output Adjustment
27
Output Current Limit Adjustment
27
Calibration Adjustment Summary
27
Replaceable Parts
28
Introduction
28
Ordering Information
28
Manufacturers
29
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HP BENCH Series Specifications
General
Brand
HP
Model
BENCH Series
Category
Power Supply
Language
English
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