
Power Supply Voltages
Check the power supply voltages for indications of power supply problems.
1. Turn off the instrument, disconnect the power cord, then remove the top cover.
2. Using a DVM, measure the power supply voltages. Use figure 6-33 for power supply pin
assignments and use table 6-2 for voltages.
3. Return to the power supply flowchart.
Table 6-2. Power Supply Voltages
Pin
Supply/Signal
Voltage
Power Supply To Mother Board Connector
1-5
+ 5 volt
+5 V
6
+5 volt remote sense
+5 V
7-9
+3.5 volt
+3.5 V
10
+3.5 volt remote sense
+3.5 V
11
+12 volt
+12 V
12
−
12 volt
−
12 V
13
Not connected
14-20
Ground
0 V
21
Ground sense
0 V
22
Power valid
+5 V
23
−
3.25 volt remote sense
−
3.25 V
24-30
−
3.25 volt
−
3.25 V
31
−
5.2 volt current limit
+2.5 V
32
−
5.2 volt remote sense
−
5.2 V
33-37
−
5.2 volt
−
5.2 V
38
Remote on/off
+12 V
HP 16500A/16501A - Service
6-38
Содержание 16500A
Страница 14: ...Figure 1 1 Dimensional Detail HP 16500A 16501A General Information 1 6 ...
Страница 19: ...Figure 2 2 Power Cord Configurations HP 16500A 16501A Installation 2 3 ...
Страница 33: ...TABLE OF CONTENTS Section III Performance Tests Page 3 1 Introduction 3 1 ...
Страница 43: ...Figure 4 11 CRT Module Adjustment Flow Diagram HP 16500A 16501A Adjustments 4 8 ...
Страница 60: ...Figure 5 1 HP 16500A Assembly Parts HP 16500A 16501A Replaceable Parts 5 4 ...
Страница 62: ...Figure 5 2 HP 16500A Chassis Parts HP 16500A 16501A Replaceable Parts 5 6 ...
Страница 65: ...Figure 5 3 HP 16501A Assembly Parts HP 16500A 16501A Replaceable Parts 5 10 ...
Страница 67: ...Figure 5 4 HP 16501A Chassis Parts HP 16500A 16501A Replaceable Parts 5 12 ...
Страница 71: ...Figure 6 1 HP 16500A 16501A System Overview HP 16500A 16501A Service 6 2 ...
Страница 73: ...Figure 6 2 Microprocessor Block Diagram HP 16500A 16501A Service 6 4 ...
Страница 102: ...This page intentionally left blank HP 16500A 16501A Service 6 33 ...
Страница 106: ...Figure 6 32 Power Supply Check HP 16500A 16501A Service 6 37 ...
Страница 108: ...Figure 6 33 Power Supply Pins HP 16500A 16501A Service 6 39 ...
Страница 118: ...Figure 6 39 Power Supply Replacement HP 16500A 16501A Service 6 49 ...
Страница 120: ...Figure 6 40 Mother Board Replacement HP 16500A 16501A Service 6 51 ...
Страница 122: ...Figure 6 41 Rear Fan Replacement HP 16500A 16501A Service 6 53 ...
Страница 124: ...Figure 6 42 Side Fan Replacement HP 16500A 16501A Service 6 55 ...
Страница 126: ...Figure 6 43 Rear Disk Drive Replacement HP 16500A 16501A Service 6 57 ...
Страница 128: ...Figure 6 44 Front Disk Drive Replacement HP 16500A 16501A Service 6 59 ...
Страница 130: ...Figure 6 45 Microprocessor Board Replacement HP 16500A 16501A Service 6 61 ...
Страница 132: ...Figure 6 46 Front Panel Board Replacement HP 16500A 16501A Service 6 63 ...
Страница 134: ...Figure 6 47 Color Display Module Removal HP 16500A 16501A Service 6 65 ...
Страница 136: ...Figure 6 48 Transferring Parts HP 16500A 16501A Service 6 67 ...
Страница 138: ...Figure 6 49 Color Display Module Installation HP 16500A 16501A Service 6 69 ...
Страница 140: ...Figure 6 50 Expansion Interface Board Replacement HP 16500A 16501A Service 6 71 ...
Страница 142: ...Figure 6 53 Mainframe Interface Board Replacement HP 16500A 16501A Service 6 73 ...