# Canonical image list
# $Id: manual.txt,v 1.2 2004/09/23 20:52:11 tomj Exp tomj $

# Environmental crap
!P	Book
!F	../png
!X	png

# Document ID crap
!T	WPS:LGP-21:Maintenance Training Manual:
!D	Librascope/General Precision LGP-21 Hardware Maintenance Manual
!C	../book.css
!H	../index.html

# page(filename.tif) /tab/ title


cover	Front cover
i
iii
i	Table of Contents
iv
ix
v
vii
viii
1-1	Section I - Introduction
1-2
1-3
1-4
1-5
1-6
1-7
2-1	Section II - Operation
2-2
2-3
2-4
2-5
2-6
2-7
2-8
2-9
3-1	Section III - Theory of Operation
3-2
3-3
3-4
3-5
3-6
3-7
3-8
3-9
3-10
3-11
3-12
3-13
3-14
3-15
3-16
3-17
3-18
3-19
3-20
3-21
3-22
3-23
3-24
3-25
3-26
3-27
3-28
3-29
3-30
3-31
3-32
3-33
3-34
3-35
3-36
3-37
3-38
3-39
3-40
3-41
3-42
3-43
3-44
3-45
3-46
3-47
3-48
3-49
3-50
3-51
3-52
3-53
3-54
3-55
3-56
3-57
3-58
3-59
3-60
3-61
3-62
3-63
3-64
3-65
3-66

k-1	FLEXOWRITER FLOW CHART, Figure 4-7, part 1
4-1	Section IV, Maintenance
4-2
4-3
4-4
4-5A	4.2.2 Program-controlled Carriage Return Operation
4-6
4-7
4-8	4.3 Flexowriter Relay Contact Information
4-9
4-10
4-11
4-12
4-13
4-14	4.4 Flexowriter Electrical Maintenance Specifications
4-15	FLEXOWRITER FLOW CHART, Figure 4-7, part 2, AFU (rebuild)
4-16	FIGURE 4-8, FLEXOWRITER TIMING CHART
4-17
4-18
4-19	4.6 Disc and Memory Head Maintenance Procedures
4-20	4.6.1 Main Memory Head Specifications
4-21	4.6.2 Main Memory Head Replacement and Adjustment Procedure
4-22
4-23	4.6.4 Recirculating Register Head Adjustment Procedure
4-24	4.7 Conversion of Deciman Track-and-Sector Addresses to Hexadecimal
4-25	(Figure 4-16, Main Memory Head Locations)
4-26	(Figure 4-17, Typical Signals)
4-27
4-28
4-29
4-30
4-31
4-32
4-33

5-1	Section IV, Logic Diagrams
5-2	Flexowriter Functions
5-3
5-4
5-5
5-6
5-7	MEMORY CONTROL, L121 COMPUTER [typo] LOGIC DIAGRAM
5-8	FIGURE 4-9, PHASE CONTROL LOGIC DIAGRAM
5-9	FIGURE 5-7, LOGIC DIAGRAM, P & Q REGISTER
5-9	FIGURE 5-8, LOGIC DIAGRAM, ARITHMETIC, LGP-21 COMPUTER
5-11	FIGURE 5-9, FLEX-TALLY I/O LOGIC DIAGRAM
5-12	FIGURE 5-10, TALLY P AND R LOGIC DIAGRAM [orig typo corrected]
5-13	MEMORY CONTROL, 1 OF 3 SCHEMATIC


6-1	Section VI, Schematics
6-2
6-4	FIGURE 6-2, MEMORY CONTROL BOARD and SIGNAL REFERENCE LIST
6-5	MEMORY CONTROL, 2 OF 3 SCHEMATIC
6-6	FIGURE 6-3, MEMORY CONTROL BOARD and SIGNAL REFERENCE LIST
6-7	MEMORY CONTROL, 3 OF 3 SCHEMATIC
6-8	FIGURE 6-4 PHASE CONTROL BOARD and SIGNAL REFERENCE LIST
6-9	PHASE CONTROL, 1 OF 2 SCHEMATIC
6-10	FIGURE 6-5, PHASE CONTROL BOARD and SIGNAL REFERENCE LIST
6-11	PHASE CONTROL, 2 OF 2 SCHEMATIC
6-12	FIGURE 6-6, FLEX-TALLY I/O BOARD and SIGNAL REFERENCE LIST
6-13	FLEX-TALLY I/O, 1 OF 2 SCHEMATIC
6-14	FIGURE 6-7, FLEX-TALLY I/O BOARD and SIGNAL REFERENCE LIST
6-15	FLEX-TALLY I/O SCHEMATIC
6-16	FIGURE 6-8, [TALLY] P AND R REGISTER BOARD and SIGNAL REFERENCE LIST
6-17	TALLY P & R BOARD, 1 OF 2 SCHEMATIC
6-18	FIGURE 6-9, [TALLY] P AND R REGISTER BOARD and SIGNAL REFERENCE LIST
6-19	TALLY P & R BOARD, 2 OF 2 SCHEMATIC
6-20	FIGURE 6-10, [TALLY] P AND R REGISTER BOARD and SIGNAL REFERENCE LIST
6-21	P & R REGISTER, 1 OF 3 SCHEMATIC
6-22	FIGURE 6-11, [TALLY] P AND R REGISTER BOARD and SIGNAL REFERENCE LIST
6-23	P & Q REGISTER, 2 OF 3 SCHEMATIC
6-24	FIGURE 6-12, P AND Q REGISTER BOARD and SIGNAL REFERENCE LIST
6-25	P & Q REGISTER, 1 OF 3 SCHEMATIC
6-26	FIGURE 6-13, ARITHMETIC BOARD and SIGNAL REFERENCE LIST
6-27	ARITHEMETIC, 1 OF 4 SCHEMATIC
6-28	 FIGURE 6-14, ARITHMETIC BOARD and SIGNAL REFERENCE LIST
6-29	ARITHMETIC BOARD, 2 OF 4 SCHEMATIC
6-30	FIGURE 6-15, ARITHMETIC BOARD and SIGNAL REFERENCE LIST
6-31	ARITHMETIC, 3 OF 4 SCHEMATIC
6-32	FIGURE 6-16, ARITHMETIC BOARD and SIGNAL REFERENCE LIST
6-33	ARITHMETIC, 4 OF 4 SCHEMATIC
6-34	FIGURE 6-17, DISTRIBUTION BOARD (S/N 21-40) and SIGNAL REFERENCE LIST
6-35	 LOGIC DIAGRAM, DISTRIBUTION
6-36	 LOGIC DIAGRAM, DISTRIBUTION
6-37	CONTROL PANEL
6-38	REAR PANEL
6-39	LGP-21 SYSTEM ASS'Y CABLING DIAGRAM
6-40	INTERNAL TALLY P & R BOARD TO TALLY PUNCH (Cable)
6-45	POWER SUPPLY, L121 COMPUTER [not typo], ELECTRICAL SCHEMATIC DIAGRAM
6-46	SCHEMATIC POWER SUPPLY
6-47	SCHEMATIC, FLEXOWRITER, LGP-21, MODEL FIO
6-48	TAPE READER, LGP-21 COMPUTER, SCHEMATIC DIAGRAM
6-49	SCHEMATIC DIAGRAM, TAPE PUNCH, LGP-21 COMPUTER
6-50	SCHEMATIC DIAGRAMS, BASIC LOGIC FUNCTIONS, LGP-21 COMPUTER [poor original]

8-1	Section VIII, Computer Parts List
8-2
8-3
8-4
8-5
8-6

tpcover	Tape Perforator, Tally model 420
tpp1	Addendum (sic)
tpp2	Parts price list
tpp3
tpw	Warrenty
tpxw	Table of Contents
tpxx	List of Illustrations
tpxy	Identification of parts
tpxz	Photograph
tp1	1.0 Introduction
tp2
tp3	Figure 2, partially exploded view
tp4	Figure 3, capstan drive
tp5
tp6	2.2 Perforator mechanism
tp7	Figures 4 and 5, Perforator assembly
tp8	Figure 6, Punch drive, sheet 1
tp9	Figure 6, Punch drive, sheet 2
tp10
tp11
tp12	2.4 Punch head assembly
tp13	3.3 Cycle length limitations
tp14	Figure 7, Perforator timing diagram
tp15	Figure 9, Wiring diagram
tp16	4.0 Instructions for use
tp17	Figure 11, Tape guide adjustment
tp18	Figure 13, Lubrication points
tp19
tp20	5.2 Cleaning
tp21
tp22	Table 5-1, Capstan drive tolerances
tp23	Figure 14, Escapement adjustment
tp24	Figure 15, Switch accessories
tp25	6.0 Optional accessories
tp26	6.2 Capstan commutator
tp27	Figure 16, Capstan commutator
tp28	Figure 17, Reel drive mechanism
tp29
tp30	Supplemental parts list
tp31
tp32

trcover	Tape Reader Manual, Tally model 424
triii	List of illustrations
trii
triv
trvi	Figure 5, Model 424PR plan view
trv
tr1	Table of Contents
tr2	1.2 Description
tr3
tr4
tr5	2.2 Tape read head
tr6	3.2 Switching action
tr7	Figure 8, Timing diagram
tr8	Figure 9, Wiring diagram for 34-pin connector
tr9	4.0 Instructions for use
tr10	5.0 Maintenance
tr11	Figure 12, Lubrication chart
tr12	Figure 13, Tape read head
tr13
tr14
tr15	Table 5.3-1, Capstan drive tolerances
tr16	Figure 18, Bidirectional tape splice
tr17	7.0 Special accessories
tr18
tr19	Figure 21, Capstan commutator
tr20	Figure 22, Commutator timing
tr21	8.0 Parts ordering and parts list
tr22
tr23	Figure 23, Model 424a parts list
tr24
tr25	Figure 24, Model 424c parts list
tr26
tr27
tr28
tr29
tr30
tr31
tr34	Warranty
tr35
tr36	Addendum