IBM 29 CARD PUNCH - User manual

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D 3 Card Punch
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& Field Engineering
Maintenance Manual
$225-3357-3

II Ina Field Engineering
Maintenance Manual
D Card Punch
$225-3357-3

Preface
This publication provides information for the maintenance
of the IBM 29 Card Punch. The manual is written with
presupposition that the reader has a working knowledge of
the machine. As much applicable information as possible is
in each section of this manual. The sections are numbered
for easy reference. The sections are presented in a sequence
similar to the card path through the machine.
Timing adjustments for some units may vary among
machines due to features and engineering changes; refer to
the individual machine wiring diagram for accurate timing.
Special features are treated individually in a separate
manual, Field Engineering Theory — Maintenance, JBM 29
Card Punch Features, [BM 29 Interpreting Card Punch,
Model C, Form 223-2926.
Other related manuals are:
Field Engineering Theory of Operation, JBM 29 Card
Punch, Form 225-3358
Illustrated Parts Catalog, JBM 29 Card Punch, Form
124-0085
Reference Manual, JBM 29 Card Punch, Form A24-3332
Fourth Edition (April 1969)
This a major revision of, and obsoletes, Form 225-335 7-2, FE Supplement Form
$23-4035, and all earlier editions. Significant changes have been made throughout
this manual, including: new diagnostic flowcharts, Chapter 1; a new chapter,
Chapter 2; new lubricant specifications, Chapter 3; revised starwheel adjustments
and revised print suppress adjustments, Chapter 4. This manual should be
reviewed in its entirety. Changes are periodically made to the specifications
herein; any such changes will be reported in subsequent revisions or FE
Supplements.
This manual has been prepared by the IBM Systems Development Division,
Product Publications, Dept B96, PO Box 390, Poughkeepsie, N.Y. 12602. A form
for readers’ comments is provided at the back of this publication. If the form has
been removed, comments may be sent to the above address.
©Copyright International Business Machines Corporation 1965, 1969

Chapter 1. Reference Data and Service Aids .
Section 1. Reference Data.
1.1 Operations
1.2 Sequence of Operations
1.2.1 Functions .
Section 2. Diagnostic Techniques
1.3 Initial Approach .
1.4 Diagnostic Flowcharts .
1.4.1 Start and Run Failures .
1.4.2 Card Transport Failures
1.4.3 Interposer Selection Failures
1.4.4 Escapement Failures
1.4.5 Punch Drive Cycle Failures .
1.4.6 Printing Control Failures
1.5 Machine Service Features
1.5.1 Motor Switch
1.5.2 Test Probe
1.6 Servicing Techniques
1.6.1 Forcing
1.6.2 Interrupting Machine Operation
1.6.3 Jum pering
1.6.4 Measuring
1.6.5 Cycling Manually
1.6.6 Interchanging Units .
1.7 Difficult-to-Analyze and Intermittent F ailures
1.7.1 Left-Zero Feature
1.7.2 Diagnosis of ““Heavy”’ or Stiff Keyboards
1.7.3 Stacker ; .
1.7.4 Starwheel Adjustment .
Chapter 2. Console and Maintenance Facilities
Section 1. Basic Unit ,
2.1 Installation Procedures .
2.1.1 Shipping Material
2.1.2 Power .
2.1.3 Keyboard Operations
2.1.4 Program and Function (Model A).
2.1.5 Program and Function (Model B) .
2.1.6 Final Checkout .
Section 2. Features. .
2.2 Installation Procedures .
2.2.1 Feature Checkout
2.2.2 Final Checkout .
Chapter 3. Preventive Maintenance .
Section 1. Basic Unit
3.1 Cleaning .
3.2 Adjustment
3.3 Safety .
3.3.1 Safety Devices
3.3.2 Electrical Hazards
3.3.3 Chemical Hazards
3.4 Lubrication
Section 2. Features .
Chapter 4. Checks, Adjustments, and Removals
Section 1. Basic Unit
4.1 Base
4.1.1 Diodes
1-7
1-7
1-7
1-7
1-8
1-8
1-8
1-10
1-10
1-10
1-11
j-11
1-12
1-12
2-1
2-1
2-1
2-1
2-1
2-1
2-1
2-2
2-3
2-3
2-3
2-3
3-1
3-1
3-1
3-1
3-1
3-1
3-1
3-1
3-1
3-8
4-1
4-1
4-1
4-]
4.1.2
4.2
4.2.1
4.2.2
4.2.3
4.2.4
4.3
4.3.1
4.3.2
4.4
4.4.1
4.4.2
4.5
4.5.1
4.5.2
4.5.3
4.5.4
4.5.5
4.5.6
4.5.7
4.5.8
4.5.9
4.5.10
4.5.11
4.5.12
4.5.13
4.5.14
4.5.15
4.6
4.6.1
4.6.2
4.6.3
4.6.4
4.6.5
4.6.6
4.6.7
4.6.8
4.6.9
4.6.10
4.6.11
4.6.12
4.6.13
4.6.14
4.6.15
4.6.16
4.6.17
4.6.18
4.6.19
4.7
4.7.1
4.7.2
4.7.3
4.7.4
4.8
4.8.1
4.9
4.9.1
Contents
Arc Suppressors .
Drive .
Drive Motor .
Drive Motor Belt Adjustments .
Backspace Mechanism Service Check .
Backspace Mechanism Adjustment
Friction Drive
Friction Drive Service Check
Friction Drive Torque Adjustment
Escapement Unit
Escapement Unit Service Check
Escapement Unit Adjustments.
Card Feed
Hopper Adjustments
Feed Clutch Adjustment
Card Feed Latch Magnet Adjustments
Hopper-to-Prepunch Bed Service Checks .
Pressure Rail Adjustments .
Card Guide Adjustments
Card Registration Service Check
Pusher Arm Adjustment
Card Stop Cam Adjustment
Pressure Roll Service Check
Pressure Roll Adjustments .
Registration Adjustments
Feed Wheel Removal and Replacement
Card Feed Circuit Breaker Service Check .
Card Feed Circuit Breaker Adjustment
Punch Drive . .
Index Pointer Adjustment .
Interposer Magnet Adjustment
Guide Comb and Bumper Adjustment
Punch Interposer Magnet Assembly Adjustment
Interposer Bail Contact Assembly Adjustment
Punch Drive Removal and Replacement .
Clutch Magnet Adjustment.
Punch Clutch Service Check
Punch Clutch Adjustments . .
High-Speed CB Assembly Service Check .
High-Speed CB Assembly Adjustment
High-Speed Cam Removal .
Die and Stripper Service Check
Die and Stripper Adjustment
Die and Stripper Removal and Replacement
(With Print Feature) .
Die and Stripper Removal and Replacement |
(Without Print Feature) .
Punch Penetration Adjustments
Punch Removal and Replacement .
Pin Bail Drive Link Adjustment
Pin-Sense Unit
Pin-Sensing Unit Service Checks
Pin-Sensing Unit Adjustments .
Pin-Sensing Unit Removal and Replacement .
Sensing Pin Removal
Eject Unit .
Eject Unit Adjustments.
Stacker Unit . .
Stacker Unit Adjustments .
4-1
4-1
4-1
4-1
4-1
4-1
4-1
4-1
4-2
4-2
4-2
4-4
4-4
4-4
4-4
4-5
4-5
4-6
4-7
4-7
4-7
4-7
4-7
4-7
4-8
4-9
4-9
4-9
4-9
4-9
4-9
4-10
4-11
4-11
4-12
4-12
4-13
4-14
4-14
4-14
4-14
4-14
4-14
4-14
4-15
4-15
4-16
4-16
4-16
4-17
4-18
4-18
4-18
4-18
4-18
4-18
lit

4.10 Program Drum Unit .
4.10.1 Sensing Assembly Service Check
4.10.2 Sensing Assembly Adjustments .
4.10.3 Sensing Assembly Removal and Replacement
4.10.4 Program Cam Contacts Service Check
4.10.5 Program Cam Contacts Adjustment
4.10.6 Program Drum Interlock Arm (Split Hub)
Adjustment
4.11 Print Unit .
4.11.1 Print Assembly Service Checks.
4.11.2 Print Assembly Adjustments .
4.11.3 Print Assembly Removal and Replacement
4.11.4 Ribbon Feed Pawl Adjustment
4.11.5 Print Drive Adjustment .
4.11.6 Print Suppress Magnet Adjustment
4.12 Keyboard . .
4.12.1 Contact Adjustments
4.12.2 Hook Support Bar Adjustment
4.12.3 Permutation Bar Adjustment
4.12.4 Restoring Magnet Adjustment .
Illustrations
Figure Title
Chapter 1. Reference Data and Service Aids
1-1 Characteristics
1-2 Operations
1-3. Sequence of Operations
1-4 Diagnostic Flowchart Symbols
1-5 Start and Run Failures .
1-6 Card Transport Failures
1-7 Interposer Selection Failures
1-8 Escapement Failures (Part 1 of 2).
1-8 |Escapement Failures (Part 2 of 2).
1-9 Punch Drive Cycle Failures
1-10 Print Control Failures
1-11 Test Probe
1-12 Reed Relay Insertion
Chapter 2. Console and Maintenance Facilities
2-1 Program Card - Model A
2-2 Program Card — Model B
Chapter 3. Preventive Maintenance
3-1 Preventive Maintenance Routines .
3-2. ~=Lubrication — Right Front .
3-3. ~Lubrication — Front
3-4 Lubrication — Front (Machine Bed Tilted)
3-5 Lubrication — Rear .
3-6 Punch Unit Lubrication
3-7 Keyboard Lubrication .
Chapter 4. Checks, Adjustments, and Removals
4-1 Friction Drive Adjustment .
4-2 Escapement Adjustment (Part 1 of 2)
4-2. Escapement Adjustment (Part 2 of 2)
4-3. Hopper Adjustment.
iV
4-20
4-20
4-20
4-22
4-22
4-22
4-22
4-22
4-22
4-29
4-33
4-36
4-36
4-36
4-37
4-37
4-38
4-38
4-38
Page
1-1
1-1
1-2
1-2
1-3
1-4
1-5
1-6
1-7
1-8
1-9
1-10
. 1-10
2-2
2-2
3-3
3-4
3-5
3-6
3-7
3-8
4-1
4-2
4-4
4.12.5 Upper Permutation Support Adjustment .
4.12.6 Key Unit Adjustment
4.12.7 Key Unit Removals .
Section 2. Features.
Chapter 5. Power Supplies
Section 1. Basic Unit
Section 2. Features.
Chapter 6. Locations
6.1 Keystem Numbering
6.2 Reed-Relay Card
6.2.1 Reed Relays .
6.3 Wire-Contact Relays
6.4 Standard Modular System (SMS) .
6.4.1 SMS Card Receptacles . .
6.4.2 SMS Locations and Pin Numbering
6.5 Location Figures
Index
Figure Title
4-4 CF Clutch Magnet Adjustment
4-5 CF Clutch Adjustment . .
4-6 CF Latch Magnet Adjustment .
4-7 Pressure Rail Adjustment
4-8 Pressure Rail — Card-Lever Contact
4-9 Card Guide — Detail Station
4-10 Card Guide — Master Station
4-11 Detail Card Registration
4-12 Pressure Roll Adjustment . .
4-13 Master Station Registration Adjustment .
4-14 Armature Pivot Adjustment .
4-15 Armature Pivot Adjustment — Side View
4-16 Armature Adjustment .
4-17 Interposer Unlatching Clearance
4-18 Interposer Relatching Adjustment
4-19 Armature Unlatching Clearance
4-20 Interposer Bail Contact Adjustment
4-21 Interposer Bail Contact Rise Adjustment
4-22 Print Drive Unit Cam Timing
4-23 Punch Clutch Magnet
4-24 Punch Clutch Components .
4-25 Punch Clutch Adjustment .
4-26 High-Speed Circuit Breaker
4-27 Punch Bed — Front View
4-28 Punch and Extension
4-29 Punch Penetration Adjustment
4-30 Sensing Pin Contact Adjustment
4-31 Pin Sensing Adjustment
4-32 Stacker Timing
4-33 Stacker Adjustment .
4-34 Traveling Card Guide
4-35 Timing Tool .
4-36 Program Unit Timing Chart
4-39
4-39
4-40
4-41
5-1
5-1
d-1
6-1
6-1
6-1
6-2
6-3
6-3
6-3
6-3
6-5
Page
4-5
4-5
4-5
4-6
4-6
4-6
4-6
4-7
4-8
4-8
4-9
4-9
4-10
4-10
4-10
4-11
4-11
4-11
4-12
4-12
4-13
4-13
4-14
4-15
4-15
4-16
4-17
4-17
4-18
4-19.
4-19
4-20
4-21

Figure
4-37
Title
Method of Holding Escapement Wheel
4-38 Program Cam Contact Adjustment
4-39 Overlay for Figure 4-40.
4-40 Code Plate Chart E‘L’
4-41 Print Interposer Assembly . .
4-42 Punch Drive and Yoke Adjustments .
4-43 Printing Adjustment
4-44 Print Interposer Assembly .
4-45 Vertical Drive Rod Assembly .
4-46 Character Patterns E‘L’.
4-47 Character Patterns E‘A’.
4-48 Test Patterns.
4-49 Print Drive Unit .
4-50 Print Head Removal.
4-51 Print Wire Replacement
4-52 Print Suppression Magnet Adjustment
4-53 Keyboard Adjustment .
4-54 Keyboard Permutation Unit — Rear
4-55 Keyboard Permutation Unit — Bottom
A ampere
alpha alphabetic
AMP amphenol pin
auto automatic
CB circuit breaker
CE customer engineer
CEM Customer Engineering Memorandum
CF card feed
chat character
ckt circuit
col, cols column, columns
ctrl control
dc direct current
def definition
dup duplicate
FC friction clutch
HSS high-speed skip
Hz Hertz (cycles per second)
Page
4-21
4-23
4-25
4-27
4-29
4-29
4-30
4-30
4-31
4-32
4-33
4-34
4-34
4-35
4-36
4-36
4-37
4-38
4-39
Figure Title Page
4-56 Keyboard Key Unit and Permutation Unit 4-40
4-57 Keyboard Interlock Disks . 4-41
Chapter 5. Power Supplies
5-1 Power Supply . 5-1
5-2 Power and Receptacle Requirements . 5-2
Chapter 6. Locations
6-1 Combination and Numeric Keystem Numbering 6-1
6-2 Locations — Relay Board and Relays . 6-2
6-3. SMS Printed Wiring Cards . . 6-3
6-4 Wire-Contact Relay Machine Relay Gate - — Card
Side View . 6-4
6-5 Locations — Front View . 6-5
6-6 Locations — Rear View (Reed- Relay Machine) . 6-5
6-7 Locations — Rear View (Wire-Contact Relay
Machine) 6-6
6-8 Locations — Rear 6-6
6-9 Locations — Front 6-7
Abbreviations
IBC interposer bail contact
intlk interlock
LZ left zero
max maximum
ms millisecond
MULT PCH multipunch
NC normally closed
NO normally open
No. number
num numeric
PCC program cam contact
PM preventive maintenance
prem program
sec second
SMS Standard Modular System
Vv volt

Safety Procedures
Safety cannot be overemphasized. To ensure personal
safety and the safety of co-workers, each CE should make it
an everyday practice to observe safety precautions at all
times. All CEs should be familiar with the general safety
parctices and procedures for performing artificial respira-
tion that are outlined in CE Safety Practices, Form
229-1264. For convenience, the -1 printing of this form has
been reproduced.
Always use a reliable voltmeter to verify that power is
actually off after using power-off switches. Although all
power supplies are provided with bleeder resistors to drain
off capacitor charges when power is dropped, it is wise to
check all capacitors with a meter before attempting
maintenance. A defective bleeder resistor could create an
unexpected hazard.
Anyone working near electrical circuits may accidentally
come in contact with live voltage.
Round off sharp edges on plastic guides; replace broken
guides.
Check that all applicable safety devices are on the
machine.
Check all safety devices for proper operation.
Do not permit machines to be run unattended with covers
open or removed.
Leave the escapement gearing cover in place at all times
when the machine is running.
Turn off power when tilting the base.
Use only IBM approved products. Read the labels. As a
general rule, cleaning fluids should be used only in an open
area. Breathing the concentrated vapors, even for a short
time,
may cause immediate reactions.
Review Customer Engineering Memorandums (CEMs) for
current safety practices.
b. Rings, wrist watches, chains, bracelets, metal cuff links,
shall not be worn.
CE SAFETY PRACTICES 2
All Customer Engineers are expected to take every safety pre-
caution possible and observe the following safety practices 13
while maintaining IBM equipment:
1. You should not work alone under hazardous conditions or 14,
around equipment with dangerous voltage. Always advise
your manager if you MUST work alone. 15.
2. Remove all power AC and DC when removing or assem-
bling major components, working in immediate area of 16.
power supplies, performing mechanical inspection of power
supplies and installing changes in machine circuitry. 17
3. Wall box power switch when turned off should be locked
or tagged in off position. ‘Do not Operate” tags, form 18.
229-1266, affixed when applicable. Pull power supply cord
whenever possible.
4. When it is absolutely necessary to work on equipment hav- 19.
ing exposed operating mechanical parts or exposed live
electrical circuitry anywhere in the machine, the following
precautions must be followed: 20.
a. Another person familiar with power off controls must
be in immediate vicinity. 21.
- Each Customer Engineer is responsible to be certain that
no action on his part renders product unsafe or exposes
hazards to customer personnel.
. Place removed machine covers in a safe out-of-the-way
place where no one can trip over them.
All machine covers must be in place before machine is re-
turned to customer.
Always place CE tool kit away from walk areas where no
One can trip over it (i.e., under desk or table).
Avoid touching mechanical moving parts (i.e., when lubri-
cating, checking for play, etc.).
. When using stroboscope —do not touch ANYTHING — it
may be moving.
Avoid wearing loose clothing that may be caught in machin-
ery. Shirt sleeves must be left buttoned or rolled above the
elbow.
Ties must be tucked in shirt or have a tie clasp (preferably
nonconductive) approximately 3 inches from end. Tie chains
are not recommended.
Before starting equipment, make certain fellow CE’s and
customer personnel are not in a hazardous position.
Maintain good housekeeping in area of machines while per-
forming and after completing maintenance.
c. Only insulated pliers and screwdrivers shall be used.
d. Keep one hand in pocket.
e. When using test instruments be certain controls are set
correctly and proper capacity, insulated probes are used.
f. Avoid contacting ground potential (metal floor strips,
machine frames, etc. — use suitable rubber mats pur-
chased locally if necessary).
5. Safety Glasses must be worn when:
a. Using a hammer to drive pins, riveting, staking, ete.
b.
Power hand drilling, reaming, grinding, ete.
c. Using spring hooks, attaching springs.
d. Soldering, wire cutting, removing steel bands.
e. Parts cleaning, using solvents, sprays, cleaners, chemicals,
etc.
f. All other conditions that may be hazardous to your
eyes. REMEMBER, THEY ARE YOUR EYES.
Rescue
Breathing
for
Adults
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6. Special safety instructions such as handling Cathode Ray
Tubes and extreme high voltages, must be followed as
outlined in CEM’s and Safety Section of the Maintenance
Manuals.
7. Do not use solvents, chemicals, greases or oils that have a
not been approved by IBM. z
8. Avoid using tools or test equipment that have not been 5 °
approved by IBM. = &
9. Replace worn or broken tools and test equipment. co
10. Lift by standing or pushing up with stronger leg muscles — 2 2
this takes strain off back muscles. Do not lift any equip- v 2
ment or parts weighing over 60 pounds. aw O
11. All safety devices such as guards, shields, signs, ground S Vv
wires, etc. shall be restored after maintenance. S <
KNOWING SAFETY RULES 1S NOT ENOUGH = 2
AN UNSAFE ACT WILL INEVITABLY LEAD TO AN ACCIDENT gz O
USE GOOD JUDGMENT — ELIMINATE UNSAFE ACTS
229-1264-1
1.
Start
Immediately,
Seconds
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vi

Section 1. Reference Data
Figure 1-1 shows machine characteristics for the IBM 29
Card Punch.
1.1 OPERATIONS
The 29 Card Punch operations may be divided, as shown in
Figure 1-2, for troubleshooting. These operations are:
1. Start and Run: Establishment of power (electrical and
mechanical) necessary for machine operations. This
includes the operation of the card feed and the
pick-and-hold of the card lever relay.
2. Interposer Selection: Engagement of an interposer or
interposers with the punch bail in preparation for
punching.
3. Escapement: Advancement of the program drum and of
the escapement-driven feed wheels.
Characteristics Description
Speed: Without Print With Print
Manual punching 20 col/sec 18 col/sec
Manual duplication 10 col/sec 9 col/sec
Automatic duplication 20 col/sec 18 col/sec
Skipping 80 col/sec
Releasing 80 col/sec
Feed from pre-register to detail 0.250 sec
station
Hopper 500 cards
Stacker 500 cards
Figure 1-1. Characteristics
A
Start and Run
Card Lever Relay
a] EI 5
Interposer Escapement Punch Drive
Selection Unit Cycles
4]
Card Transport
Figure 1-2. Operations
Chapter 1. Reference Data and Service Aids
4. Card Transport: Mechanical control of the movement of
the card through the machine.
5. Punch Drive Cycle: Controlled rotation of the punch
drive unit index shaft. According to the function, this is
required to punch a hole in the card at the punch station
or to read a hole in the card at the pin-sense station.
1.2 SEQUENCE OF OPERATIONS
It is essential that the customer engineer be aware of the
correct sequence of operations as they are used in any
machine function.
1.2.1 Functions
When the function is to punch a character from the
keyboard, the sequence of operations is:
Start and run
Interposer selection
Escapement
Card transport
Punch drive cycle
Using the numbers only, the sequence is:
1
2
3-4
5
Showing escapement and card transport (3-4) side by side
indicates that while 3 causes 4, they occur at the same time.
Using this notation, the sequence of these operations for all
of the functions of the 29 Card Punch is shown in Figure
1-3.
The functions shown in Figure 1-3 are the responses of
the machine to the inputs shown here:
wPWN
SD
Key Punch Press any character.
Multiple Punch Press the multiple punch key and any
numeric key.
Key Skip Press the skip key in numeric or alpha-
betic shift.
Press the duplicate key for one or more
columns with no programming.
Manual Duplicate
Blank Column Manual
Duplicate
Press the duplicate key for one or more
blank columns with no programming
and with the machine in alphabetic shift.
Pressing the duplicate key or the reading
of a “0” in the program card in a
column followed by “12’s” in the
program card.
Auto Duplicate
Blank Column Auto
Duplicate
Same as “Auto Duplicate” but for blank
columns with the machine in alpha-
betic shift.
Skip: Release, Auto, Press release key if starwheels are up or
Drum if they are down in a column pro-
grammed “12”. An “11” in a program
card. Card-to-card skip.
Release, Auto Space Press release key in a nonprogrammed
field but with the starwheels down.
29FEMM (4/69) 1-1

Blank Blank |Skip:
Column ColumnjRelease,| Release
Key Mult Skip |Manual|/Manual] Auto |Auto |Auto, |Auto
Function| Punch Punch Key Dup Dup Dup |Dup {Drum |Space
First
Col
1
3 15
4 4-5 3
1 1 1 1 1 1
-2| 5 5-2 5 3=4 3-4
3-4 3 -4 3-4 3-4 3-4 5
5 5 5 5
nob
ND wm
QtnNn-=
Second Repeat | 2-5 3-4 Repeat Repeat} 3-4 3-4 Repeat | Repeat
and for All Repeat Repeat} forAll forAIl 5-2 5-2 for All for All
Other Cols for All| for Cols {Cols Repeat |Repeat| Cols Cols
Cols Cycles Field for for
Def Field Field
Def Def
3-4
5
Last
Col
Figure 1-3. Sequence of Operations
Section 2. Diagnostic Techniques
1.3 INITIAL APPROACH
The first step in troubleshooting is to reduce the possible
trouble sources to one of the five operations. Locate the
operation that breaks the correct sequence for the failing
function.
The second step is to vary the machine function to one in
which the failing operation occurs in another sequence.
This tests the same operation with a different input. For
example, interposer selection is faulty during keypunching
(2, 34, 5). Varying the function to manual duplication
(5-2, 3-4, 5) allows interposer selection from the pin-sense
input instead of the key input. The cause of the failure, if
in a particular input path,can be discovered in this way. If
the same operation fails, regardless of the input path used,
the failure is common to all paths.
Enough information may be gained in this way to find
the cause of the failure by using the wiring diagram and the
test probe.
For those troubles that cannot be found by using this
approach, refer to the appropriate section in Chapter 4.
Diagnosis of the complete failure of all machine opera-
tions should be preceded by a continuity check of the
fuses. If attempted punching fails to occur after a card has
been registered at the punch station, the card lever relay
should be checked first. Consistent blowing of fuses
indicates a short or a ground on the machine. Line
terminals and/or cam contacts can be checked, one at a
time, to locate this type of failure. Some common possible
sources of grounds are the starwheel contact and the latch
magnet contact.
1.4 DIAGNOSTIC FLOWCHARTS
Figure 1-4 defines the symbols used in the diagnostic
flowcharts (Figures 1-5 through 1-10). These flowcharts aid
in locating the trouble area when diagnosing fairly consist-
ent failures.
1-2 (4/69)
Trouble approach
action
Error indication
decision
Direction comment)
Figure 1-4. Diagnostic Flowchart Symbols
1.4.1 Start and Run Failures
To locate start and run failures (Figure 1-5), the starwheels
must be raised and blank cards must be used.
1.4.2 Card Transport Failures
Diagnosis of the failure causing incorrect card movement
should include an initial visual check to confirm that the
components of the card transport mechanisms are oper-
ating. When card transport failure occurs, any mark or nick
on the card will help to indicate the source of trouble
(Figure
1-6).
A change in registration during the duplication of one
punched card can be a false indication of card transport
failure. If the escapement moves while the sensing pins are
still up through the holes in the card, the card will be
retarded. The sensing pins usually leave marks on the card.
(See 1.4.4.)
Improperly inserting cards into the pin-sense station can
cause trouble. The card to be duplicated should not be
forced into the pin-sense station before registering the card.
1.4.3 Interposer Selection Failures
Interposer selection may be incorrect from either the
keyboard or pin-sense units, or both. If either unit operates
correctly, the circuits and components of the other unit
must be considered as a source of the trouble. If both units
fail, the trouble is assumed to be in the interposer magnets
and associated circuitry or in the interposer mechanism
(Figure 1-7).
Note that when the interposers have been tripped for any
reason, they must be restored by a drive-unit cycle.
To avoid confusion in diagnosis, the starwheels must be
raised to locate interposer selection failures.
1.4.4 Escapement Failures
Faulty escapement is defined as: escaping too far, not far
enough, not at all, or at the wrong time.
Program control is used with Figure 1-8 to locate
escapement failures. The program card should be punched
for alternate three-column duplications and two-column

Slowly or overheats
Set mainline and motor
switches to ON
Motor
| Check motor start relay
Check motor
Card is not fed to pre-register station
Check card L_ clack |
—
par
eerannAO
Check CF clutch cao
Check CF magnet circuit |
[cheek card feed =
[chest card lever cow)
No trouble found, go to
card transport flowchart
(Figure 1-6)
Check CF latch mechanism
| Check CF 4 magnet
circuit
Check card feed mechanism
No trouble found, go
to card transport flowchart
(Figure 1-6)
Does not register
Figure 1-5. Start and Run Failures
No
Yes
Release and feed card
es a
and program drum ro-
Yes
Register the card and
space out
Drum does not go to column 1
ike No spacing or punch drive cycles
Check mainline voltage
Check mainline fuses
|
| Check motor start relay
|
Check motor
| Check punch clutch |
operation
Check de voltages
| Check release relay
| Check skip relay
| Check skip or escape |
circuits
|
| Check program cam |
contact |
|
severed
No trouble found, go
to escapement flow-
chart (Figure 1-8)
|
Check card lever relay
contacts
Check card lever contoct
Check card lever relay
pick-and-hold circuits
No trouble found, go
to escapement flowchart
(Figure 1-8) if no
spacing, or go to
punch drive cycles
flowchart (Figure 1-9)
if no punch drive cycles
29 FEMM
(4/69)
1-3

Does not leave hopper
Check hopper pressure
plate
|Check hopper adjustments
Check feed knives |
| Check cards
Check card pusher
mechanism
Check punch pressure
roll opening
Check for obstruction
in punch throat
Hesitates or buckles
Check punch pressure
roll for alignment
Check upper rail card
L
guide alignment
I< heck pin-sense pressure
r
oll en
Check pin-sense
card <=
for et
Check 1 roll or
arm tension
| ese pin-sense throat |
Feed card from rereer
Card
movement
satisfactory
Crooked at pre-register station
[Check hopper cdjsrment|
Check feed knives
Hesitates or buckles
Check pin-sense pressure
roll
Check 1 card
guide
Check cards Check eject guide
an feed pressure lls
| Register card |
Check card
L
Crooked
Registers
Check operation of
aligner fingers
card |
Check condition of card Check traveling card
(bent, curled, etc.) guide
| |
| Check card pusher |
mechanism
L
Check punch pressure Check eject roll or
roll opening
Offset
Check eject guide
arm tension
J
Does not slide along upper rail
Check punch pressure
roll for alignment
Check punch pressure
rails
Releases
Intermittent
Dup cards, Measure
distance between cards
at various columns
Register card at
pin-sense station
Distance
varies
Registers at
pin~sense
station
Goes beyond
Check pin-sense pressure
rol] =
Check — stop plate
and —
Check —_ arm
tension
Repeat test
Figure 1-6. Card Transport Failures
1-4 (4/69)
| Release card
Releases
| Stack card
Stacks
Stacks
correctly
No
Manually operate card
feed and observe
stacking mechanism
Does not slide along
upper rail
Check pin-sense pressure
roll
Check pressure rail
alignment
Check traveling card
guide
No or crooked
Check traveling card
guide
Check eject guide |
Check a roll or
arm tension
Check stacker cams
|
4

Operate numeric
and alphabetic
character keys
Check interposer relatch
Check keyboard restore
Check keyboard contacts
for short circuit
Extra interposers or repeat punch cycles Interposers No
selected
Yes
Duplicate space,9...12
Extra interposers on dup Interposers No
ONES
Check interposer relatch
E heck pin-sense contact |
Check common bar
Check throat plates and
card registration
Key
Check interposer magnet
mechanism
Check interposer
Check keyboard shift ckt
Check for magnet impulse.
If no pulse, proceed to
key or dup branch
Dup
|
Check keyboard contacts
| Check restore circuit |
Figure 1-7. Interposer Selection Failures
[check pin-sense contacts |
| Check sensing pin |
Check card registration
29FEMM (4/69) 1-5

A. Alphabetic Duplicate
With auto skip/dup
switch off, key dup
alphabetic and blank
columns
Completes
duplicate
field
Yes
C Perform B and C +
Extra column or at wrong time
Escapement
Check dup key contact
Check 12 program contact and circuit
|
t
|
Check
escapemen
|
Check
dup
relay
sep
|
interlock relay
|
Check escape circuit |
Check P1 cam contact
No trouble found, go
to B
No trouble found, go
to interposer selection
flowchart (Figure 1-7)
B. Numeric Duplicate and Skip Operate numeric keys,
auto dup all 12 digits,
and alternate skip
| Check 12 program co
prsnanaceretieseiray
1
Check dup relays
ve
ntact
cemeenenrenrentnel
Check 4 circuits
No —- found,
to B
*)
Too far Card goes
Escapement off registration
Yes (nicked or torn holes)
Check escapement
interlock relay
L
7
Check 0 program el
duration
| Check PI timing and
| Check P1 cam contoct |
|
—
Check auto Le |
switch
Check - clutch
Check that punch
interposer
is
Check
r
relay
—
aa escape interlock
relay
|
|
engaging bail
Check setup of IBC |
Check escape circuit |
No trouble found, go
to interposer selection
flowchart (Figure 1-7)
No trouble found, go
to interposer selection
flowchart (Figure 1-7)
Completes
dup field
rT.
diel
Check 12 program contact
r
Check dup relays
|
Check dup circuit
p= ait.
a “~<
Perform A and C
Figure 1-8. Escapement Failures (Part 1 of 2)
1-6 (4/69)

C. Key Punch Operate any alphabetic
key or skip key
Too far No
| Escapement
Check
FC
torque
So
C Perform A and B +
Check armature adjustment
Check drive gear train
|
No trouble found,
analyze original
failing condition
Figure 1-8. Escapement (Part 2 of 2)
skips through column 38. This is followed by a 25-column
skip (ending in column 63), an 11-column alphabetic
duplication, a 5-column skip, and duplication of column
80.
1.4.5 Punch Drive Cycle Failures
Locate punch drive cycle failures with the starwheels raised
(Figure 1-9). Diagnosis of clutch failures should include an
initial manual cycle of the punch drive unit. Incorrect
clutch overthrow or a defective detent can be found while
performing this operation.
1.4.6 Printing Control Failures
The program card used for locating escapement failures can
be used for locating programmed printing failures. Diagnos-
tic flowchart is Figure 1-10.
1.5 MACHINE SERVICE FEATURES
The 29 Card Punch has two diagnostic features that have
been incorporated to aid the customer engineer. These are:
Motor switch
Test probe
1.5.1 Motor Switch
The motor switch turns the motor off and allows other
areas of the machine to remain energized. It is useful when
manually cycling the machine. Some adjustments are made
with the motor stopped.
1.5.2 Test Probe
The test probe (Figure 1-11) contains a neon indicator in
series with a resistor. One lead of the indicator is connected
Check FC torque or escape
magnet
Check escape mechanism
|
Check Pl cam contact
|
to the power supply. The other lead is used to trace circuits
leading to coils or magnets. A jack is provided on the power
supply chassis.
CAUTION
Care must be used when probing relay points because the
point of the probe might spread the pin connectors and
cause the reed switch to make poor contact or break the
pin. Be careful in the use of the test probe; an accidental
short could tack several relay points. The probe should
not be used to estimate circuit voltages. Use the meter for
voltage measurements.
Reed relays should be probed through the top of the
bobbin because the vertical rows of holes on the land
pattern for a particular relay position do not, in all cases,
connect to the relay connector.
Note: When probing P3, a false indication may occur; P3
appears not to make. This is due to the timing relationship
between the short duration of P3 (7 ms) and the 60-Hz
negative line pulse used to bias the probe.
1.6 SERVICING TECHNIQUES
1.6.1 Forcing
Extra pressure can be applied to various components to
simulate malfunction. For example, the friction drive can
be forced or retarded manually at the top of the program
drum, or finger pressure can be applied to the escape
magnet armature to help or hinder its operation. Magnetism
of the escape magnet can be detected, and its strength
estimated with any lightweight steel blade (screwdriver or
burnishing tool). |
29FEMM (4/69) 1-7

multipunch
fail
Perform escape-punch
first cycle dup, and
All operations
1
Check clutch mechanism |
t
Proceed to appropriate
routine to diagnose fault
Check clutch circuits
Escape Punch]
___[Meltipunch
Press character key,
Watch punch bail
] First Cycle Dup
punch bail
Manually duplicate a
punched column, Watch
Hold down mutlipunch key.
Press combination key and
watch punch bail
More than one
Cycles
None
More than
two More than one per key
| Check escapement Check clutch mechanism
Check clutch circuits
(After escape
cycle)
None
(After escape cycle)
Check multipunch relay | Check interposer bail |
contact
Check escape intlk
Check clutch nechonten |
L |
Check multipunch circuit
Check clutch mechanism
|
Check escape intlk relay |
—
Check dup relay setting Check clutch circuits | check clutch mechanism
| Check clutch circuits |
I I
1
Check clutch circuit
L
! Check clutch circuit |
PO
Lay
Lg
Le
Check escape ==
No trouble found, go
to interposer selection
flowchart (Figure 1-7)
Figure 1-9. Punch Drive Cycle
1.6.2 Interrupting Machine Operation
The sequence of machine operation can be interrupted and
controlled by removing a lead from the controlling mag-
nets. For example, a lead can be removed from the escape
magnet or from the punch clutch magnet. Operation can
then be controlled by retouching the lead long enough for
one operation to occur.
CAUTION
The machine should not be left static in the middle of an
operating sequence for a long period of time.
The source of undesired operations can often be located
by removing leads along the undesired circuit until the
source is found. This should not be done in reed-relay
circuits with power on.
1-8 (4/69)
1.6.3 Jumpering
Portions of circuitry suspected of being open can be
jumpered to determine whether they are open. It is also
useful to jumper the desired voltage into a circuit, to
determine how much of the circuit operates correctly.
Circuit Card Tab Connections: Individual wires are easily
removed from the connectors to facilitate circuit diagnosis
or component isolation. To remove wires from Amphenol
connectors, use AMP* disconnect tool (part 452815).
1.6.4 Measuring
A voltmeter can be used while the machine is static to
measure the magnitude of a voltage. Manual operation may
*Trademark of Amp, Incorporated

With print switch off,
keypunch and dup
all characters
|
Check print suppress
circuit
|
| Check print switch
Check print suppress
mechanism
|
Check print drive
|
No troubles
found, see 4.1]
Yes
Prints
With print switch on and
starwheels up, keypunch
and print all characters
Wrong, smudgy, or too light Prints No
| Check ribbon
Yes
| Check platen
Print and duplicate all
Check punch throat characters under program
for obstruction control
Prints Ne
Yes Prints
when suppressed
Check print suppress
mechanism
Prints No
Yes
—— according to
|
Check print relay |
contacts
Check print relay pick
circuit
Check print suppress
mechanism
Check 12 program contact!
(print relay hold circuit)
Nee
Extraneous zeros
Left zeros
Check print relay
| Check —t suppress
—
Check — suppress
circuit
Check 12 —
contact
) Check LZ switch
|
Check print suppress
mechanism
|
! Check print switch
|
Check print suppress |
magnet circuits
|
! Check LZ print switch
No last character
wrong
Insufficient zeros
Figure 1-10. Print Control Failures
Check card lever relay
|
Check print suppress
mechanism
|
| Check LZ print switch
es
OL Ld
| Check escape interlock
| Check P2 cam contact |
and timing
| Check print relay
29 FEMM
(4/69)
1-9

Figure 1-11. Test Probe
be performed to determine the timing of circuit breakers.
The voltmeter can also be used while the machine is
operating, to detect the presence and relative magnitude of
the voltage.
1.6.5 Cycling Manually
Turn the motor switch off. Observe machine functions
while manually operating the escapement gear train and the
punch clutch. This allows voltages to be checked at any
time during the machine cycle.
1.6.6 Interchanging Units
Keyboards, relay boards, or relay gates may be inter-
changed with other machines of the same type and feature
configuration. This can help isolate suspected units when
diagnosing intermittent troubles.
1.6.6.1 Relay Gate
The relay gate in either type of machine is easily remove-
able. In the reed-relay machine, drop the relay gate out of
the guide tracks through the slots provided. In the
wire-contact relay machine, first slide one tab out of the
slot, then slide the other tab out.
1.6.6.2 Arc Suppression
Arc suppression is necessary for the proper operation and
longevity of the reed-relay switches. If trouble is suspected
in an arc suppression network, it must be substituted with
another.
CAUTION
Removal of arc suppression for diagnosis can cause
considerable damage as well as faulty operation.
1-10 (4/69)
1.6.6.3 Reed Relays
When inserting reed relays on the circuit board, care must
be exercised not to exert pressure on the coil portion of the
relay. Pressure exerted on the coil can cause the relay to
flex, and breakage of the glass reed switch may occur. To
prevent this breakage, the relay must be positioned and
pressed on the card with equal pressure exerted on each of
the plastic ends of the relay (Figure 1-12).
A short caused by a defective part or a slip of the hand
while troubleshooting could damage several relays. All
relays in the circuit between the short and the line should
be checked because the sudden surge of current could cause
the interceding relay points to weld or develop a tacking
condition. Do not remove or replace relays during a
machine cycle.
If tacking is suspected, do not jar the machine because
the tacking problem may disappear temporarily. Do not
interchange relays or relay types. If the relay used does not
have a hold coil, do not put one that has a hold coil in its
place. Do not interchange relay reeds, The individual relay
reeds are matched and should not be interchanged by
disassembly or use of ones from other relays.
Repeated relay insertions and removals can cause the glass
envelope to break; Berg connectors may lose tension and
cause intermittent failures. Check connector alignment with
a 0.010-inch feeler gage, aligning it with adjacent con-
nector.
Figure 1-12. Reed Relay Insertion
1.7 DIFFICULT-TO-ANALYZE AND INTERMITTENT
FAILURES
There are some sources of trouble in the 29 Card Punch
that cause varying results and are difficult to diagnose.
Among these are:
1. Friction drive torque (too much, too little, or jumpy)

No
. Punch clutch spring (broken, dry or gummy, or loss of
tension)
. Punch clutch armature (broken or worn)
. Punch clutch detent pivot stud (worn or loose)
. Punch clutch overthrow (too much or too little)
. Relays (high resistance shorts or hold points burned or
welded)
7. High-speed cam contacts (binding roller, strap tension,
or loose contact pile-up)
8. Interposer bail contacts (strap tension, air gap, or
contact condition).
An intermittently failing machine should not be returned to
the customer without investigating every suspected cause of
the failure.
NON
&
W
1.7.1 Left-Zero Feature
1.7.1.1 Left-Zero Overflow/Iincorrect Punchout
Incorrect punchout of left-zero information occurs if the
operator keys-in more digits than the field can contain.
Reed-relay machines continue shifting the bits in the
registers; the first digits keyed-in are lost. Wire-contact relay
machines accumulate the overflow of bits in the first
register. |
Examples: In a reed-relay machine with a five-position field
programmed, the operator keys-in 1, 2, 3, 4, 5, 6. The
machine punches out 2, 3, 4, 5, 6 when the left-zero key is
pressed. In a wire-contact relay machine with a five-position
field programmed, the operator keys-in 1, 2,3, 4,5, 6. The
machine punches 3, 3, 4, 5, 6 when the left-zero Key is
pressed.
1.7.1.2 Intermittent Loss of Bits
Common causes for loss of information during read-in or
read-out operations are:
1. Keyboard latch or bail contact adjustments
2. Keyboard restore bail contact adjustment
3. Error reset contact or backspace switch intermittently
breaking contact
4. Loose slip-on connectors to punch interposer magnet
unit
5. Loose connectors in 0-volt or 48-volt net to LZ relays
6. Punch CBs out of adjustment.
1.7.2 Diagnosis of “Heavy” or Stiff Keyboards
To isolate the source of trouble when a keyboard feels
“heavy” or stiff, make the following checks.
1.7.2.1 Key Pressure
Key pressure can be affected by lubrication, by interference
between the keystem and the cover, or by sluggish interlock
disks.
Lubrication: Check to be sure that the proper lubricant is
used in the correct places. Refer to “Chapter 3.”
Interference: Check to be sure that the keybuttons are
centered within the holes in the cover face.
Interlock Disks: Check for dirty, magnetized, or oily
interlock disks.
1. With the machine on, press the P-key.
2. Using a gram gage, operate the P-key; 55 to 65 grams
should be read. Note the actual pressure required to
operate the key.
. Press the Q-key.
4. Using the gram gage, operate the P-key again. The
pressure required should not exceed 10 grams more than
the reading noted in step 2.
5. If step 4 failed to meet the requirements specified,
remove the interlock disks.
a. Wash the disks and the race in IBM cleaning fluid to
remove all traces of oil or dirt.
b. Test for magnetism by sliding the disks down an
inclined steel surface; replace all sticking disks.
Oo
1.7.2.2 Keyboard Cycle Time
To check for slow keyboard restore:
1. Open keyboard base and place machine in numeric shift
by inserting a card between the numeric keystem
contacts.
2. Feed a card to column 1.
3. Short latch contact 6 and time the punching of 80
columns. Timing should be approximately 4.5 seconds.
4. If the time exceeds 7 seconds, repeat the punching
operation with one thickness of card inserted between
the keyboard restore magnet armature and the core.
5. If an increase in speed of the punching operation occurs,
adjust the armature-to-core clearance to 0.005 inch. (No
increase in speed indicates a slow machine cycle.)
Note: Keyboard restore magnet coils are connected in
parallel. A short or open in either coil upsets the balance of
the circuit. Symptoms include slow keyboard cycles,
double punching, or extra spaces.
1.7.2.3 Machine Cycle Time
To check machine cycle timing:
1. Install an 80-column auto-dup program card on the
program drum.
2. With the machine in alphabetic shift, time the automatic
duplication of 80 columns (using blank cards). Timing
should be 4 to 4.5 seconds.
3. If timing exceeds the limit, slow action is due to the
punch clutch, the friction clutch, or the escapement
mechanisms.
29 FEMM (4/69) 1-11

4. Place the machine in numeric shift and time the
automatic duplication of 80 columns (using punched
cards). Timing should be 4 to 4.5 seconds.
5. If timing exceeds the limit, slow action is due to the
interposer magnet assembly:
a. Excessive magnet-to-armature air gap. ©
b. Interposer bail contacts.
1.7.3 Stacker
The base should not be raised or lowered by using the
stacker plate as a handle; relative position of the stacker
plate to the stacker assembly may be changed and may
require readjustment. Improper adjustment of the traveling
card guide can cause difficulties in reading the end portion
of a card.
1.7.4 Starwheel Adjustment
The 29 Card Punch is designed so that the starwheel
duration is about 9 ms. One tooth on the escapement wheel
equals 12 ms. This timing is critical because too much or
too little duration could cause relay points to arc. This
could be compounded if the relays develop a tacking
condition.
1-12 (4/69)

Section 1. Basic Unit
2.1 INSTALLATION PROCEDURES
2.1.1 Shipping Material
1. Visually check for any machine damage before signing
the bill of lading. If machine is severely damaged, notify
your branch office before continuing the installation
procedure.
2. Using packing/unpacking instructions (part 7331107),
locate and remove spacers, washers, and screws on base
rubber mounts. Also, remove the two screws in the base
pivot brackets to allow tilting of the base for servicing.
. Check for loose cables, connectors, and components.
. Adjust line cord to keep excess cord off the floor.
. For Model C machines, refer to Field Engineering
Theory—Maintenance, IBM 29 Card Punch Features/29
Interpreting Card Punch, Model C, Form 223-2926.
nb
W
2.1.2 Power
1. Compare voltage requirements with those supplied.
Chapter 5 shows power and receptacle requirements.
2. Turn power on and observe the punch drive for smooth
operation.
2.1.3 Keyboard Operations
1. Set the following switches:
Starwheels raised.
Punch/interpret — PUNCH (Model C).
Auto skip/dup — OFF.
Auto feed — OFF.
Print — OFF.
. Left-zero print — OFF.
2. Put cards in the hopper.
3. Press release key:
a. Column indicator revolves 80 columns and returns
to column 1.
b. No cards feed from the hopper.
4. Press register key. Card feed cycle occurs, but no cards
feed from the hopper.
5. Press and hold feed key. Two cards feed from the
hopper.
6. Press A through Z and 0 through 9 keys.
a. Press each key twice to detect binding keystems.
b. Hold numeric key while keying numbers.
7. Release and register second card.
8. Set print switch to on position and press all special
character keys.
9. Operate the clear switch. Both cards should feed to the
stacker. No cards feed from the hopper.
monooe
Chapter 2. Console and Maintenance Facilities
10. Compare holes in the cards:
a. Holes in the cards should compare with the keys
pressed in steps 6 through 8.
b.
Machine
with
print
feature
prints
special
char-
acters in corresponding columns.
11. Check registration by using a card gage.
2.1.4 Program and Function (Model A)
1. Set the following switches:
a. Auto skip/dup — OFF.
b. Program select — ONE.
c. Auto feed — ON.
d. Print — ON.
e. Left-zero print — ON.
2. Install Model A program card (Figure 2-1) on drum,
install drum in machine, and lower the starwheels.
3. Feed two cards from the hopper.
1.4.1 First Card
2
1. Press O through 9 keys.
2. Press skip key. The cards move to column 34.
3. Backspace to column 14 to check that registration is
maintained for 20 columns of backspacing.
4. Press dash key. If machine has X-skip feature, program
drum skips to column 34; if not, press skip key and
program skips to column 34.
. Press all alphabetic character keys (A through Z).
. Press skip key. Program drum should be at column 80.
7. Multipunch 0 through 9 in column 80. Multipunch key
must be pressed and held while keying-in 0 through 9.
NN
No
.1.4.2 Second through Fifth Cards
poo’
. Set auto skip/dup switch to on position.
2. Set left-zero print switch to off position. A “0” should
be punched but not printed in column 1.
3. Press dup key. Machine duplicates card and program
drum skips to column 80.
4. Press space key.
1.4.3 Sixth Card 2
1. Set auto skip/dup switch to off position.
2. Set program select switch to TWO.
3. Press program two key.
4, Press dup key (duplicate to column 11).
5. Press skip key (skip to column 34).
6. Press dup key (duplicate to column 60).
7. Press skip key (skip to column 78).
8. Press and hold alpha key; press Z, A, and Q keys.
29FEMM (4/69) 2-1