DS, GS, AND DEPOT MAINTENANCE MANUAL, POWER SUPPLIES PP-1209/FG, PP-1209A/FG, PP-1209B/FG,

*TM

11-5805-239-35

DEPARTMENT

THE

ARMY

TECHNICAL

MANUAL

DS, GS, AND DEPOT MAINTENANCE MANUAL, POWER

SUPPLIES PP-1209/FG, PP-1209A/FG, PP-1209B/FG,

AND PP-1209C/FG

Headquarters, Department of the Army, Washington, D.C. 20315

2 May 1966

WARNING

Dangerous voltages exist in this equipment. Be careful when working

on the power supply circuits or the 115-volt ac line connections. Serious

injury or death may result from contact with these points.

Power Supply PP1209/FG contains selenium rectifiers which re-

lease poisonous compounds and fumes when they burn out or arc over.

If this happens, provide adequate ventilation immediately and do not

handle the rectifier until it cools. The fumes have a strong odor and are

toxic; permanent injury or death could result from prolonged inhalation.

DON'T TAKE CHANCES

Paragraph

Page

CHAPTER 1. INTRODUCTION

1-1

Scope

1-2

1-1

Index of publications

1-3

1-1

Internal differences in models

2. FUNCTIONING OF POWER SUPPLY PP-1209(*)/FG

2-1

General

2-1

2-2

Circuit analysis

3. DIRECT SUPPORT MAINTENANCE

Section I. Troubleshooting techniques

3-1

General instructions

3-2

3-1

Organization of troubleshooting procedures

3-3

3-1

Test equipment required

Visual inspection

Troubleshooting chart

3-3

3-6

Isolating trouble within plug-in unit

II. Repair

3-7

General parts replacement techniques

3-7

Testing repaired equipment

3-8

CHAPTER 4. GENERAL SUPPORT TESTING PROCEDURES

4-1

General support testing procedures

4-2

4-1

Test Equipment and other equipment

4-3

4-2

Test facilities

*This manual, together with TM 11780723912, 4 October 1962, superseds TB SIG 284, 25 June 1956; in-

cluding Cl, 30 September 1957; C2, 9 June 1958; C3, 16 November 1960; C4, 12 March 1963; and C5, 27 December

1963.