Digital Equipment PC04 User manual

Maynard, Massachusetts
aintenanc anual
P 4/PC05
R DER/PU
P ER-TAP
(FEED-HOLE STROBED M

DEC-OOPCOA-D ( 1 )
PC04/PCO5
PAPER-TAPE
READER/PUNCH
(FEED-HOLE STROBED MODELS)
This manual pertains only to those PC04 or PC05 models that
strobe the data
by the signal derived from the feed holes. This
method
is provided when ECO number PCO4-00046 or PC05
00021 is implemented on the corresponding PC04 or PC05 unit.
When the unit is not implemented with the above
ECO, refer
instead to the corresponding maintenance manual:
PC04 (Document Number DEC-00-HGPA-D) or
PC05 (Document Number DEC-00-HGHA-D).
--
DIGITAL EQUIPMENT CORPORATION MAYNARD, MASSACHUSETTS

1 st Edition, August 1970
2nd Printing
(Rev) June 197 1
3rd Printing October 1972
4th Printing December 1972
Copyright 0 1970, 197 1, 1972by Digital Equipment Corporation
The material in this manual is for information-
al purposes and is subject to change without
notice.
The following are trademarks of Digital Equipment
Corporation, Maynard, Massachusetts:
DEC PDP
FLIP CHIP FOCAL
DIGITAL COMPUTER LAB

CONTENTS
Page
CHAPTER 1 GENERAL INFORMATION
1.1 Scope
1.2 General Description
1.3 Functional Description
1.3.1 Reader
1.3.2 Punch
1.4 Specifications
CHAPTER 2 INSTALLATION
2.1 Inspection
2.2 Installation
2.2.1 Mounting
2.2.2 Connections
2.2.3 Module Configurations
2.3 Power Requirements
2.4 Checkout
CHAPTER 3 OPERATION
3.1 Introduction
3.2 Controls and Fuses
3.3 Operating Instructions
3.3.1 Loading Blank Tape
3.3.2 Loading Prepunched Tape
CHAPTER 4 PRINCIPLES OF OPERATION
4.1
4.1.1
4.1.2
4.1.3
4.1.4
4.1.5
4.2
4.2.1
4.2.2
Paper-Tape Reader
Tape Feed Operation
Tape Reading
Tape Reader Control
Out-of-Tape
Strobe
Paper-Tape Punch
Feed Control
Tape Punch Control
CHAPTER 5 MAINTENANCE
5.1 Introduction
5.2 Preventive Maintenance
5.2.1 Preventive Maintenance Procedures
5.2.1.1 Mechanical Checks
5.2.1.2 Electrical Checks
5.3
5.3.1 Introduction
PCO4/PCO5 Reader Adjustments (Feed-Hole Strobed Models)
1-1
1-1
1-2
1-2
1-3
1-3
2-1
2-1
2-1
2-1
2-2
2-3
2-3
3-1
3-1
3-1
3-1
3-3
4-1
4-1
4-2
4-3
4-3
4-3
4-3
4-3
4-4
5-1
5-1
5-2
5-2
5-2
5-2
5-2
...
ll1

CONTENTS (Cont)
Page
5-3
5
-4
5 -4
5-5
5-5
5-6
5-6
5-8
5-9
5-1 0
5-10
5-1
1
5-1 1
5-1 1
5-1 1
5-1 1
5-1 1
5-1
1
5-1 1
5-1 1
5-1 2
5-1 2
5-1 2
5-13
5-13
5-15
5-1
5
5-16
5-1
6
5-16
5-1 6
5-1 7
5.3.2
5.3.3
5.3.4
5.3.5
5.3.6
5.3.7
5.3.8
5.3.9
5.3.
IO
5.3.1 1
5.3.1 1.1
5.3.1 1.2
5.3.1 1.3
5.3.1 1.4
5.3.1 1.5
5.3.1
1.6
5.3.1 1.7
5.4
5.4.1
5.4.2
5.4.2.1
5.4.2.2
5.4.2.3
5.4.3
5.4.4
5.4.5
5.4.5.1
5.4.5.2
5.4.6
5.4.6.1
5.4.6.2
5.4.6.3
Prcliminary Adjustments
Test Tape Registration
Feed Whccl and Motor Adjustmen
Tape Depressor
Tape Hold-Down Bracket
Lamp,Lens, and Light Pattern
Full-Speed Running Rate
Acceleration and Stop Delay
Threshold and Skew
Testingand Error Correction
Data Bits Picked Up
Data Bits Dropped
SkippingCharacters
Double Reading
DroppingFlags
Out-of-Tape Circuit
Acceptance Testing
Punch Adjustment Procedures
General
TapeOutputQuality
Sprocket Wheel Adjustment
Burred Feed Holes
Elongated Feed Holes
Tape Depressor
ElectricalParameters
Basic Timing
Method (1)
Method
(2)
Magnet Adjustments
Pulse GeneratorAir Gap
Forward Index Magnet Armature Adjustment
Punch Magnet Adjustment
CHAPTER 6 REFERENCEDRAWING LIST
APPENDIX A DIAGNOSTIC PROGRAMS
APPENDIX
B SUGGESTED PROGRAMS FOR ALTERNATE ONES AND ZEROS TEST ‘TAPES
APPENDIX C STALL PROGRAMS
APPENDIX
D SUMMARY SET-UP PROCEDURE
iv

ILLUSTRATIONS
Figure No.
1-1
1-2
2-
1
3- 1
3-2
4-1
4-2
5- 1
5-2
5-3
5 -4
5-5
5-6
5-7
5-8
5-9
5-1 0
5-1 1
5-1 2
5-1 3
5-14
5-1 5
Table No.
1-1
1-2
2-
1
2-2
3-
1
5- 1
5-2
5-3
5-4
6- 1
6-2
6-3
Title
Reader Functional Block Diagram
Punch Functional Block Diagram
PCO4/PCO5 Module Locations
Paper Tape Path, Top View
Installing Tapc in Paper-Tape Reader
Tape Feed Operation
Simplified Block Diagram, Punch Operation
Regulator Board
Feed Wheel and Motor Adjustment
Tape Depressor
Tape Hold-Down Bracket
PCO4/PCO5, Rear View
Light Pattern
M040 Input and Output Waveforms
Acceleration and Stall Waveforms
Summation Waveform,
G9 18 Test Point
Specifications for
I-In. Paper Tape
Improved Tape Dcpressor
Electrical Parameters
Punch Assembly
Forward Index Magnet Armature
Punch Magnet
Art No.
CO-0479
C0-0480
CP-0133
CO-0478
C0-047 1
CP-0034
CP41 15
CP-0 1 16
CP-0033
CP-0
1 I2
CP4113
CP-01
14
C0-0473
CO-0476
C0-0474
C0-0472
C0-0475
TABLES
Title
PCO4/PCO5 Configurations
PCO4/PCO5 Specifications
CPU and BA Connections
Module Configurations
PCO4/PCO5 Controls and Fuses
Required Maintenance Equipment
Power Supply Output Checks
M040 Motor Driver Input and Output Pin Locations
G9 18 PhotoamplifierPin Locations
PC04 Engineering Drawings
PC05 Engineering Drawings
PCO4/PCO5Module Circuit Schematics
Page
1-2
1-3
2-2
3-2
3-3
4-2
4-4
5-3
5-5
5-5
5-6
5-7
5-7
5-8
5-9
5-10
5-12
5-14
5-14
5-16
5-17
5-18
Page
1-1
1-4
2-1
2-3
3-1
5-1
5-2
5-8
5-9
6-1
6-1
6-2
V

--
PC04 (Used with PC04 (Used with
PDP-81) PDP-8E and 8L)
Description
Reader Only PC04R PC04RB
Punch Only PCO4P, PA* PCO4PL, PM*
Reader and Punch PC04BB, BC* PC04BL, BM*
CHAPTER 1
GENERAL INFORMATION
PC05 (Used with
PDP-11,
12, and 15)
PCOSR
PCOSP, PA*
PCOSC, CA*
1.1 SCOPE
This manual contains maintenance information for both the PC04 and PC05 High-speed Paper-Tape Readers and
Punches (feed-hole strobed models only) manufactured by Digital Equipment Corporation (DEC). The earlier
versions
of thc PC04 and PCOS models, which do not strobe the data by the signal derived from the feed holes,
are described in the followingmaintenance manuals:
PC04 Maintenance Manual, DEC-00-HGPA-DIand PC05
Mainten~/~ce Matlual, DEC-00-HGHA-D.
The PC04 is currently used with the PDP-8E, PDP-81, and PDP-8L computer systems, and the PCOS is used with
the PDP-I
I, PDP-1 2, and PDP-15 computer systems. Each computer system has its own unique interface and
control characteristics; consequently, this manual discusses only the electrical and mechanical operations of the
basic reader and punch and considers the computer
an external piece of equipment.
--
1.2 GENERAL DESCRIPTION
The PCO4/PCOS High-speed Reader and Punch is supplied as an option to the various computer systems and is
available in the configurations listed in Table
1-1.
1-1

The tape punch mechanism is a Roytron Model 500 modified by DEC. Contained in the unit is an electromechan-
ical tape feed and punch system capable of punching five-, seven-, oreight-level tape. In addition, an SCR Driver
is included on the
PC05 that switches the ac power to the punch motor after a command to punch is received.
/
- FEED HOLE OUT OF TAPE
RD HOLE 8
SD RD HOLE 7
- RD HOLE 6
RD HOLES 1-8
M040
M7050
READER
RD
RD HOLE 4 CONTROL
RD HOLE
3 MODULE SKIP
RD HOLE 2
RD HOLE 1 INTERRUPT
READER FEED SWITCH
1.3 FUNCTIONAL DESCRIF’TION
INPUT/
OUTPUT
BUS
1.3.1 Reader
A functional block diagram of the tape reader is shown in Figure 1-1. The read head, located below the tape,
contains nine photocells;eight for sensing data and one for sensing the feed hole.
The light source is located directly above the tape channel and read head. As the tape passes over the read head,
each photocell senses the presence (a hole) orabsence (no hole)
of light. When a hole is detected, tlhat photocell
is activated and feeds an individual photoamplifier. The output of the photoamplifier is sent
to the M7050
Reader Control Module, which temporarily stores the eight data bits in a buffer and then signals the: central pro0
essor that data is available. The central processor responds with a command that strobes the data (KD holes
1
through 8) into the central processor via the Input-Output Bus lines.
The reader FEED switch, when pressed, enables the reader control, which advancesthe tape through the read
head without actually reading.
Figure 1-1 Reader Functional Block Diagram
TO CPU
I
Tape is advanced through the read station in a steppingmotion by a sprocket wheel connected to the shaft of the
reader drive motor. The
M040 Solenoid Driver Modules provide drive current to the two center-tapped motor
windings in turn.
As each half of a winding is activated, the motor and, hence, the sprocket wheel rotate to pull
the tape through the read station.
1-2

4
1.3.2 Punch
The punch unit performs three basic operations: it moves the paper tape, positions the tape, and punches the tape
kloving, positioning, and punching of paper tape all occur during one rotation of the punch mainshaft.
A functional block diagram of the punch is shown in Figure 1-2. A punch command and the data to be punched
are sent from the respective central processor and are stored in the
h.1710 Punch Control Module'. When it has
been determined that the punch mainshaft is at the beginning of a punch cycle, the
M7 10 activatesthe M044
Solenoid Interposer Drivers which, in turn,initiate operation of the punch pins. The M7 10then signals the cen-
tral processor that another punch command may be initiated.
The punch drive motor, which advances the tape through the punch block, is iontrollcd by the SCR Driver in lhe
PC05 and a switch in the PC04. The object of the
SCR is torun the motor only when punching to eliminate un-
necessary noise and wear. There are twoways
of enabling the SCR Driver:
a. A punch command from the CPU.
b. Pressing the PUNCH FEED switch (overrides a punch command from the CPU).
Thc motor requires 0.4 sec to reach full speed,at which time the punch command is executed. A timer in the
punch circuitry allows the motor torun for
5 sec after the last punch command,in the event more punching is
tooccur.
PUNCH PINS
......... .'.
I
PUNCH BLOCK
1 (INTERPOSERS)
PUNCH
DRIVE
)I
fiinTnD
123F45678
115VAC
DATA FROM CPU PUNCH
CONTROL
MODULE
ttt
Y
COMMANDS FROM CPU
CO-0480
Figure 1-2
Punch FunctionalBlock Diagram
1.4 SPECIFICATIONS
Table
1-2 lists the mechanical, electrical,and environmentalspecifications for thePC04 and PC05 Reader/punch.
?ThePCBE incorporatesthe M7050 (Reader Control), the M715 (Reader Accelerator), and the M710 (PunchControl) functions on one module:
the
M840. Otherwise operation is identical.
1-3

Table 1-2
PCO4/PCO5 Specifications
Specification
Physical dimensions
Tape characteristics
Tape tension (in punch)
Power requirements
Power supplies (internal)
Logic levels
Temperature
(Operating)
Temperature
(Nonoperdtilig)
Humidity*
(Operating)
Humidity
(Nonoperating)
tions for operating environment should be followed. Suppliers of paper tape include Digital Equipment
Corporation and Carter Rice Storrs and Bement.
**Tape of
up to 12% transmittance may be used. Consult DEC for operation ofredder with more transparent
tape.
-
Description
-
1Ieight: 10.5 in.
Width:
19 in.
Depth:
15 in.
Reader: Gray, moiled, fan-folded**
Punch: Oiled ormoiled, fan-folded
6 oz, maximum
115 Vac +lo%, 50 or 60 Hz
Regulated, -1 5V f 1V
Regulated, +5V f: 0.25V
Unregulated,
-36V f 4V
Logic 1 (H): +2.0V, input
Logic
0 (L): +0.8V, input
+2.4V, output
+0.4V, output
Reader: 55" to 110°F
Punch: 55" to 110°F
Reader: 10" to 150°F
Punch: 10" to 150°F
Reader: 20 to 95% (w/o condensation)
Punch:
20 to 95% (w/o condensation)
Reader:
5 to 95% (w/o condensation)
Punch:
5 to 95% (w/o condensation)
-
1-4

CHAPTER 2
INSTALLATION
2.1 INSPECTION
On receipt of the equipment, inspect it forany visible signs of damage in transit, such as dents or abrasions. In-
spcct the logic modules for any foreign material that may have lodged in them during shipment. Any damage
observed should be reported immediately to both the carrier and DEC. Check the contents of the carton with
thc shipping document and report any omissions immediately to DEC. Installation is not recommended until
all
materials are in hand.
2.2 lNSTALLATION
2.2.1 Mounting
As previously noted, the PCO4/PCO5 is used with different computer systems, and therefore a specificmounting
procedure cannot be included in this manual. The unit is normally mounted in thc central processor cabinet
above the control panel. It can,however, be mounted in an accessory cabinet.
2.2.2 Connections
Refer toFigure 2-1 for PC0connections and Table 2-1 forCPU or BA connections.
Table 2-1
CPU and BA Connections
PDP-81
I
PDP-8E
I
PC04
Reader Cable -+ M840
Punch Cable
-+ M840
M840 -+ Omnibus
Readcr Cable -+ DO 1
Punch Cable -+ CO 1
M7050 --f HJ26
M710 -+ HJ28
M7
15 + HJ27
M040 + C02-C06
BA12
I
PDP-1 1
I
PC05
~ ~~
Reader Cable -+ M781
Punch Cable
-+ M78 1
M105+ E13or El4
M781
-+ CD13 or CD14
M782
-+ F13 or F14
~ ~
ReaderCable -+ DO6
Punch Cable
-+ DO7
MI l9+ BO6
PDPSL
Reader Cable -+ C34
Punch Cable
-+ (234
M7050
-+ AB30
M710 -+ AB32
M715
-+ AB29
BA15
~
Reader Cable -+ B28
Punch Cable
-+ 13 1 3
M103+B15
M104+ B10
M311 -+ A28
M606
-+ B14
M776
-+ AB22

12345
t
,23456
fl
Lo
P-
-
I
4
-
0 a
k
z
0 0
a
W 0
W
a
0
Y)
0 P-
5
a
-
PC04 (81)
c
-PC04 (BE AN0 8L)
5 6 7 8 9101112
CP-0133
Figure 2-1 PCO4/PCO5 Module Locations
2.2.3 Module Configurations
Because the reader and punch are available in many configurations, the quantity and type of modulesvary. Table
2-2 lists the modules required for each configuration.
2-2

Table 2-2
Module Configurations
Reader & Reader
Module Description Punch Only
G918 Photo Amplifier
1 1
M040 Solenoid Driver 4 4
M044 Solenoid Driver 3 0
G918 Photo Amplifier
1 1
M040 Solenoid Driver 4
4
G918 Photo Amplifier
1 1
M040 Solenoid Driver 4 4
M044 Solenoid Driver 3 0
M7050 Reader Control
1 1
M710 Punch Control
1 0
M715 Reader Clock
1 1
Unit
PC04
(PC8Eand
PC8L)
Punch
Only
0
0
3
0
0
0
0
3
0
1
0
PC04
(PC8I)
PC05
2.3 POWER REQUIREMENTS
The 3-terminal, I IO-Vac power connectors (PI and P2), located at the rear of the chassis, provide both an input
and an output point for primary power. The connectors, one male and one female, permit the inclusion
of the
PCO4/PCO5 in a power chain with other system devices.
Power and signal connections are made in accordance with the procedures given in the applicable IDEC interface,
installation, or maintenance manual.
2.4 CHECKOUT
When the PCO4/PCO5has been installed, proceed as follows to checkout the unit.
Step Procedure
1
2
Apply power to the computer system and turn on the punch and reader
Load a new carton of tape in the punch tape well, located at the rear of the
chassis, and feed the tape through the punch unit (refer to Paragraph
3.3.1).
Press the punch FEED switch on the front panel. Tape should feed out of the
tape slot and should be unpunched except for feed holes.
Hold the punch FEED switch on until a few feet
of tape have been punched.
Tear off the tape and insert it in the reader head, feeding from left
to right.
Press the reader FEED switch and observe that the tape feeds evenly without
binding on the edges
of the tape guide.
Load and run the applicable MAINDECdiagnostic test (listed in Appendix A),
using the instructions contained with the diagnostic test. If any errors olccur,
refer to Chapter
5 of this manual.
3
4
5
6
2-3

CHAPTER 3
OPERATION
3.1 INTRODUCTION
This chapter contains information on the PCO4/PCO5 controls, and loading of tape. All programming is done via
the computer. Refer to the respective user’s guide ormaintenance manual for this programming information.
3.2 CONTROLS AND FUSES
The controls and fuses for the PCO4/PCO5 are listed in Table
3-1.
Table 3-1
PCO4/PCO5 Controls and Fuses
Nomenclature
PUNCH ON/OFF (SW) (PC04)
PUNCH FEED
(SW)
READER ON-LINE/OFF-LINE (SW)
READER FEED (SW)
F1 3A, SB
F2 4A
F3 1A
UNIT ON/OFF
(SW)
Function
Applies power to punch motor.
Punches leader tape.
Allows or disallows reading of tape (on-line).
Manually feeds tape through read station.
Fuses the ac power to the unit.
Fuses the
+5V regulated power input.
Fuses the
-1 5V regulated power input.
Switchesac power into the unit.
3.3 OPERATING INSTRUCTIONS
For routine operation of the PCO4/PCO5, refer toTable 3-1, which describes controls and fuses. Tape loading
procedures are given below.
3.3.1 Loading Blank Tape (refer to Figure 3-1)
To load blank tape for punching, proceed as follows:
Step Procedure
1
Pull the unit straight out of the rack on its drawer slides, then flex the tape-feed
bracket and remove and discard the exhausted tape supply carton.
Press the FEED button on the tape punch until the stub end
of tape stops mov-
ing out
of the machine. (continued onnext page)
2
3- 1

Step Procedure
Pull the stub out
of the exit slot.
Install a carton
of tape in the tape well provided on the rear of the tape punch
chassis.
3
4
NOTE
Under certain conditions, such as low humidity,
chad tends to build-up in the plastic punch cover
and subsequently the punch assembly. Thiscondi-
tion can be avoided by dipping the plastic punch
cover in an antistatic solution.
5
Feed the new tape out of the carton,with the printing face down. Route the
tape through the two rollers, over the out-of-tape switch and guide plate, directly
into the punch block (see Figure 3-1).
Guide the tape out over the sprocket and down through the feed-chutetray.
Press and hold the PUNCH FEED switch until several folds of tape are present
in the bin. It is necessary to stack the first few folds by hand to guarantee
proper stacking.
It is good practice to empty the chad box whenever a new box of tape is loaded.
The punch should be oiled monthly by running a box of oiled tape through it
while punching all
1s.
6
7
8
9
Figure 3-1 Paper Tape Path, Top View
3-2

3.3.2 Loading PrepunchedTape (Figure 3-2)
To load prepunched tape for reading, proceed as follows:
Step Procedure
1 Raise the tape depressor and load the tape into the right-hand bin. Thread the
tape under the tape hold-down bracket.
Place the tape on the sprocket teeth and lower the tape depressor fork. Press the
READER FEED switch. Run the tape leader into the left-hand bin and dress the
tape folds.
2
2.
I.
3. 4.
Figure 3-2 Installing Tape in Paper-Tape Reader
3-3