IBM System/34 User manual

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SY31 -0457-5
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IBM System/34
5340 System Unit
Maintenance Manual

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IBM System/34
5340 System Unit
Maintenance Manual
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Sixth Edition (January 1981)
This is a major revision of, and obsoletes, SY31-0457-4. Changes or additions to
the text and illustrations are indicated by a vertical line to the left of the change or
addition. Changes are periodically made to the information herein; these changes
will be reported in technical newsletters
or in new editions of this publication.
Use this publication only
for the purposes stated in the Preface.
It is possible that this material might contain reference to, or information about,
IBM products (machines and programs), programming, or service,s' that are not
announced in your country. Such references or information must not be construed
to mean that IBM intends to announce such IBM products, programming, or
services in your country.
Publications are not stocked at the address below. Requests for copies of IBM
publications and for technical information about the system should be made to
your IBM representative or to the branch office serving your locality.
'This publication could contain technical inaccuracies
or typographical errors. Use
the Reader's Comment Form at the back
of this publication to make comments
about this publication.
If the form has been removed, address your comments to
IBM Corporation, Publications, Department 245, Rochester, Minnesota 55901.
IBM may use and distribute any of the information you supply in any way it
believes appropriate without incurring any obligation whatever. You may, of
course, continue to use the information you supply.
© Copyright International Business Machines Corporation 1977, 1978, 1979,
1980, 1981
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This 'manual contains maintenance information that will
be used by the customer engineer who installs and
maintains the IBM System/34. Most maintenance on
System/34 is performed using this maintenance manual
and the System/34 MAPs (maintenance analysis
procedures)., Additional information about this service
method is in Section
01-100 How to Use the System/34
MAPs and Maintenance Manual.
Customer engineers using this manual are assumed to
have been trained on System/34 as described in the
5340 Technical Service Letter (TSL).
The 5340 System Unit Theory Diagrams Manual has a
list of abbreviations and a glossary that gives the
meaning
of words and abbreviations used in this
maintenance manual.
There are several DANGER and CAUTION messages in
this manual. You can use the blank lines
below each
message to translate it into your own words.
Note: This manual follows the convention that he means
he or she.
Preface
'Related Publications
• IBM System/34 Operator's Guide, SC21-5158
• IBM System/34 Functions Reference Manual,
SA21-9243
• IBM System/34 5340 System Unit Theory Diagrams
Manual,
SY31-0458
• IBM System/34 5340 System Unit Parts Catalog,
S131-0632
• IBM System/34 Installation and Modification Reference
Manual: Program Products and Physical Setup,
SC21-7689
• IBM System/34 System Data Areas and Diagnostic
Aids Manual, L
Y21-0049
• IBM System/34 System Support Program Logic
Manual: System, L
Y21-0050
• IBM System/34 1255 Attachment Feature
Theory/Maintenance Manual, SY31-0521
iii

iv
ELECTROMAGNETIC INTERFERENCE
United States Federal Communications Commission
(FCC) rules require IBM to
publish the following information, which applies to each unit (including modems and
terminals) described in this manual (hereafter called equipment).
WARNING: This equipment generates, uses, and can radiate radio frequency energy,
and if not installed and used in accordance with. the instruction manuals, may cause
interference to radio communications. It has been testeeJ and found to comply with the
limits
for a Class A computing device pursuant to Subpart J of Part 15. of FCC rules,
which are designed to provide reasonable protection against such interference
when
operated in a commercial environment. Operation of this equipment in a residential
area is likely to cause interference, in which
case the user at his own expense will be
required to take whatever measures may be required to correct·the interference.
Instructions Pursuant to FCC Pa~t 15, Subpart J
1. This equipment should not be.installed less than.30 meters (98.5 feet) from
radio or television receivers or their receiving antennas.
2. This equipment should
not receive its power from branch circuits that also
power radio or television receivers.
If this equipment cannot comply with the above distance limitation:
1. Turn the equipment and the receiver on. If no interference is apparent, no
further action need be taken.
2. If interference occurs, reorient or relocate the equipment, the receiver, or both.
3.
If interference still occurs, contact your IBM representative.
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Contents 01-000 INTRODUCTION TO MAINTENANCE -
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-
I 02-000 REFERENCE INFORMATION
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05-000
POWER
-
07-000
5211 PRINTER ATTACHMENT •
,"' .... _"
-
( \ 08-000 3262 PRINTER ATTACHMENT
\\".-J
09-000 62EH DISK DRIVE -
10-000
62PC DISK DRIVE -
"'-'" 11-000 WORK STATION ATTACHMENT -
( \
\1
CE PANELS -
----./ 13-000
15-000 PROCESSING
UNIT
-
21-000 OPERATOR PANEL •
23-000 33FD DISKETTE DRIVE -
25-000 53FD DISKETTE DRIVE
..
27-000 72MD DISKETTE MAGAZINE DRIVE -
30-000
MULTILINE COMMUNICATIONS ADAPTER -
-,
U 31-000
DATA COMMUNICATIONS (FIRST OR SECOND COMMUNICATIONS ADAPTER) -
40-000 1255 MICR ATTACHMENT -
45-000 INSTALLATION INSTRUCTIONS •
80-000 ERROR
INFORMATION'
-
81-000 Main Storage Processor
•
82-000 Control Processor
•
83-000 Disk -
84-000 Diskette -
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85-000 3262
and 5211 Printers -
86-000 Work Station Controller
III
87-000 Display Station -
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I' 'I
, ) 88-000 5256
and 5225 Matrix Printers
III
"-_/
..
89-000 Data Communications
..
99-000 SYSTEM/34 DIAGNOSTIC SERVICE GUI
DE
•
0

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Ensure that you understand and observe the safety
precautions printed in the CE Safety Practices card that
is used in the country where you work. A copy of the
card that is used by customer engineers who work in
the U.S. follows.
CAUTION AND DANGER NOTICES
Throughout this manual, the word DANGER is used to
inform you of an action that could cause you to receive
an injury. The word CAUTION is used to inform you of
an action that could damage the machine that you are
working on, or affect the running of the customer
program.
DANGER AREAS OF SYSTEM/34
Observe the following danger conditions when working
on the System/34:
• Be especially careful when working in areas of
System/34 that contain parts that become hot during
normal machine operation, areas where high voltage
is present, and areas that have moving parts.
• Do not touch the diskette drive belt while the diskette
drive is running.
DANGER NOTICES
The following danger notices appear throughout this
manual in the sections named:
05-100 Power Introduction: Set the circuit breaker (CB1)
to Off if you want all voltages off. With the IPO switch
turned off and CB 1 on, AC line voltage is still present at
the control supply and DC output voltages from the
control supply are present at the A-A 1 board, the
operator panel, and the CE panel. Because of thf.
charge on the capacitors in the arc-suppression
networks across K1 and K2, a voltage is still present on
all circuits supplied by the contactor points when K1
and K2 are de-activated (see paragraph 05-315).
Safety
05-315 Power AC Box: When K1 and K2 are
de-activated, a voltage is still present in the circuits that
are supplied by the points of the contactors. The
voltage is present because of the charge on the
capacitors in the arc-suppression networks across the
points of the contactors.
05-500 Immediate Power Off: Set the circuit breaker
(CB1) to Off if you want all voltages off. With the IPO
switch turned off and CB1 on, AC line voltage is still
present at the control supply and DC output voltages
from the control supply are present at the A-A 1 board,
the operator panel, and the CE panel. Because of the
charge on the capacitors in the arc-suppression
networks across K1 and K2, a voltage is still present on
all circuits supplied by the contactor points when K1
and K2 are de-activated (see paragraph 05-315).
09-020 62EH Disk Enclosure Removal: The disk
enclosure weight is i2.5 kg (27 pounds). Clear a space
for the disk enclosure before removing the disk
enclosure from the machine.
09-030 62EH Drive Motor Removal and Replacement:
CB 1 must be off to remove AC voltage from ACTB3 and
ACTB4.
09-035 62EH Motor Start Relay Removal: CB1 must be
off to remove AC voltage from the motor start relay
,erminals.
09-050 62EH Brake Assembly Adjustment: Ensure that
the disconnected wires are away from ACTB3 (lower
drive) or ACTB4 (upper drive).
220 Vac is present on ACTB3 and ACTB4.
09-120 62EH Cable and Card Locations: 220 Vac is
present on ACTB3 and ACTB4.
10-020 62PC Subframe Removal: The subframe/ disk
enclosure weight is 16 kg (35 pounds). Clear a space
for the subframe/ disk enclosure before removing" the
subframe/disk enclosure from the machine.
Safety

10-030 62PC Disk Enclosure Removal: The disk
enclosure weight is 9 kg (20 pounds). Clear a space fo.r
the disk enclosure before removing the disk enclosure
from the machine.
10-080 62PC Motor Assembly Terminal Block Removal:
CB1 must be off to remove AC voltage from this circuit.
10-090 62PC Card Gate Fan Assembly Terminal Block
Removal: CB1 must be off to remove AC voltage from
this circuit.
10-100 62PC Drive Motor Assembly Removal: CB1 must
be off to remove AC voltage from this circuit.
10-130 62PC Card Gate Fan Assembly Removal: CB1
must be off to remove AC voltage from this circuit.
23-060 33FD Safety: The drive motor case may be hot
and may burn your hand. When the drive motor is
operating, do not touch the drive motor case or the
drive belt.
23-170 33FD Drive Motor Removal: The drive motor
case may be hot and may burn your hand.
23-170 33FD Drive Motor Replacement: To prevent
personal injury, position the two large square holes in
the motor frame so the holes are under the bracket.
The holes are large.enough for a finger to go through.
25-020 53FD Safety:
1. The system supplies the alternating current and
direct current power. Voltages are present on the
connector terminals in the diskette drive when the
drive motor is turning.
2. Motor and solenoid cases become hot after
continuous use; wait enough time for parts to cool
before servicing.
25-490 53FD Head/Carriage Adjustment: Voltage is still
present at the power connector when the head/carriage
is disconnected and power is on.
25-510 53FD Head/Carriage Replacement: Voltage is
still present at the power connector when the
head/carriage is disconnected and power is on.
2
25-520 53FD Diskette Drive Solenoid and Bail Service
Check: Voltage is still present at the power connector ...
when the diskette drive solenoid and bail are.l;·'
disconnected and power is on.
25-530 53FD Solenoid and Bail Adjustment: Voltage !s
still present at the power connector when the solenoid'
and bail are disconnected and power is on.
, The solenoid case becomes hot after continuous use. '
25-540 53FD Solenoid and Bail Removal (Machines with
Taper Pin Block): Voltage is still present at the power
connector when the solenoid and bail are disconnected
and power is on.
25-550 53FD Solenoid and Bail Removal (Machines
without Taper Pin Block: Voltage is still present
at the
power connector when the solenoid and bail are
disconnected and power is on.
25-600 53FD Diskette Drive Motor Removal: The motor
case becomes hot after continuous use.
25-610 53FD Drive Motor Replacement (60 Hz motors):
To prevent personal injury, if your motor case has two
large holes, position the two large holes in the motor
frame so the holes are under the bracket. The holes are
large enough for a finger to go through.
25-690 53FD Stepper Motor Replacement: Voltage is
still present at the power connector when the stepper
motor is disconnected and power is on.
25-710 53FD Pulley and Clamp Replacement: Voltage is
still present at the power connector when the pulley and
clamp are disconnected and'power is on.
25-840 53FD Phototransistor Amplifier Service Check:
Voltage is still present at the power connector when the
phototransistor amplifier is disconnected and power is
on.
27-020 72MD Safety:
1. The system supplies the alternating current and
direct current power. Voltages are present on the
connector terminals in the diskette drive when the
drive motor is turning.
2. Motor and solenoid cases become hot after
continuous use; wait enough time for parts to cool
before servicing.
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27-200 72MD Removal and Replacement: The 72MD
unit weight is 18 kg (40 pounds).
1-
27 -295 72MD Carriage Bed Orient Adjustment: Voltage
is still present at the power connector when the drive
motor power cable is disconnected and power is on.
27-600 72MD Head/Carriage Service Check: Voltage is
still present at the power connector when the
head/carriage is disconnected and power is on.
27-605 72MD Head/Carriage Adjustment: Voltage is
still present at the power connector when the
head/carriage is disconnected and power is on.
27-610 72MD Head/Carriage Removal and Replacement:
Voltage is still present·
at the power connector when the
head/carriage is disconnected and power is on.
27-615 72MD Head/Carriage Stepper Motor
Reinstallation: Voltage is still present at the power
connector when the head/carriage stepper motor is
disconnected and power is on.
27-620 72MD Head/Carriage Pulley and Clamp
Reinstallation: Voltage is still present at the power
comiector when th"e head/carriage is disconnected and
power is on.
27-690 72MD Index Sense PTX Output Service Check:
Voltage is still present at the power connector when the
drive motor power cable is disconnected and power is
on.
27 -800 72MD Driver Board Output to Picker/Cam
Stepper Motor Service Check: Parts of the driver board
become hot after continuous use.
27 -805 72MD Driver Board Output to Carriage Bed
Stepper Motor Service Check: Parts of the driver board
become hot after continuous use.
27 -845 72MD Carriage Bed Stepper Motor Control Card
Signal Output Check: Parts of the driver board become
hot after continuous use.
27 -850 72MD Picker/Cam Stepper Motor Control Card
Signal Output Check: Parts of the driver board become
hot after continuous use.
30-360 Une Plate Adjustment: Voltage is present on the
line plate from the telephone lines.
31-320 Une Plate Adjustment: Voltage is present on the
line plate from the telephone lines.
80-210 Power Distribution for ESD: Disconnect the line
cord before checking the screws holding the line cord.
99-041 Diagnostic Supervisors; Concurrent Maintenance:
If you are performing maintenance on the printer, have
the operator take the printer offline to 'prevent the
printer from being activated by an external source.
Safety 3