LIST OF ILLUSTRATIONS-continued

TM 11-6625-444-14-2

LIST OF ILLUSTRATIONS (Cont)

Page

Title

Figure

6-3

Location of Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-2

6-3

Location of Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-3

6-6

Troubleshooting Flow Chart, Dc Voltage . . . . . . . . . . . . . . . . . . . .

6-4

6-11

Troubleshooting Flow Chart, Ac Voltage . . . . . . . . . . . . . . . . . . . .

6-5

6-13

Troubleshooting Flow Chart, Dc/Dc Ratio . . . . . . . . . . . . . . . . . . .

6-6

6-15

Troubleshooting Flow Chart, Auto Ranging . . . . . . . . . . . . . . . . . .

6-7

6-19

PCB, Digital Circuit Board.... . . . . . . . . . . . . . . . . . . . . . . . . . .

6-8

6-20

PCB, Analog Circuit Board.... . . . . . . . . . . . . . . . . . . . . . . . . .

6-9

6-22

Digital Voltmeter AN/GSM-64C, Exploded View. . . . . . . . . . . . . . . .

6-10

6-23

Rms Converter (A7) Signal Input Connections . . . . . . . . . . . . . . . .

6-11

6-25

Digital Voltmeter AN/GSM-64C, Front Panel Assembly . . . . . . . . . . .

6-12

6-27

Digital Voltmeter AN/GSM-64C, Bottom Cover Explosion . . . . . . . . .

6-13

6-28

Digital Voltmeter AN/GSM-64C, Rear Panel Assembly . . . . . . . . . . .

6-14

6-29

DcVoltage Accuracy Checks . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-15

6-31

Dc/dc Ratio Accuracy Checks . . . . . . . . . . . . . . . . . . . . . . . . . .

6-16

6-33

AcVoltage Accuracy Checks. . . . . . . . . . . . . . . . . . . . . . . . . . .

6-17

6-36

Dc Volts Calibration, Equipment Connections . . . . . . . . . . . . . . . . .

6-18

6-37

Location of Adjustments, Analog and Ratio Boards . . . . . . . . . . . . .

6-19

6-40

DC Ratio Calibration, Equipment Connections . . . . . . . . . . . . . . . .

6-20

6-42

DC Ratio Calibration, Equipment Connections . . . . . . . . . . . . . . . .

6-21

6-43

Location of Test Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-22

6-44

DC Ratio Auto Range Detector Calibration . . . . . . . . . . . . . . . . . . .

6-23

6-45

Location of Adjustments and Test Points, Autoranging . . . . . . . . . . .

6-24

6-46

DC Voltage Autoranging, Equipment Connections . . . . . . . . . . . . . .

6-25

6-49

DC/DC Ratio Autoranging, Equipment Connections . . . . . . . . . . . . .

6-26

6-50

Location of Adjustments, True Rms Board . . . . . . . . . . . . . . . . . . .

6-27

6-51

RMS Converter Adjustment, Equipment Connections . . . . . . . . . . . .

6-28

6-56

Crest Factor Adjustment, Equipment Connections . . . . . . . . . . . . . .

6-29

6-58

DC Volts Accuracy, Equipment Connections. . . . . . . . . . . . . . . . . .

6-30

6-60

AC Volts Accuracy Check, Equipment Connections . . . . . . . . . . . . .

6-31

Voltmeter Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

All fold-out

FO-1

Power Supply (A1, A2) Schematic Diagram . . . . . . . . . . . . . . . . . .

illustrations

FO-2

are located

D C Volts Attenuator/Analog Switching (A1) Schematic Diagram . . . . .

FO-3

in back of

A/D Converter Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . .

FO-4

FO-5

manual.

Auto Range Up/Down Detector (A1) Schematic Diagram . . . . . . . . .

Relay Switching Circuits (A1) Schematic Diagram . . . . . . . . . . . . . .

FO-6

Function Select Logic (A2) Schematic Diagram . . . . . . . . . . . . . . .

FO-7

Manual/Auto/Remote Range Circuits (A2) Schematic Diagram . . .

FO-8

FO-9

Counters and Display Circuits (A2, A3) Schematic Diagram . . . . . . .

Parallel BCD Output (A2) Schematic Diagram . . . . . . . . . . . . . . . . .

FO-10

FO -1 1

Range Encoder/DP Encoder Circuits (A2) Schematic Diagram . . .

FO-12

Rms Converter Preamplifier and Scaling (A7) Schematic Diagram . . .

FO-13

True Rms Converter (A7) Schematic Diagram . . . . . . . . . . . . . . . . .

FO-14

Dc Ratio Amplifier (A9) Schematic Diagram . . . . . . . . . . . . . . . . . .