Wang 1111M User manual

CUSTOMER
ENGINEERING
MODEL 1111M
PRINTER/PLOTTER
MULTIPLEXER
MAINTENANCE
MANUAL
NOTICE:
This document is the property of Wang Laboratories, Inc.
I nformat1on contained herein is considered company propri·
etary information and 1ts use 1s restricted solely to the
purpose of assisting you in servicing Wang products. Repro·
duct1on of all or any part of this document 1s proh1b1ted
without the consent of Wang Laboratories.
111.C.O.M-O
( )
LABORATORIES, INC.
WANG ONE INDUSTRIAL AVENUE. LOWELL, MASSACHUSETTS 0185t, TEL.[phone]. TWX 710 343·6769, TELEX 94·7421

III.C.O.M-0
SECTION
1•1
1.2
SECTION 2
SECTION 3
SECTION 4
4. 1
4.2
4.3
4 .1~
4.5
TABLE OF CONTENTS
DESCRIPTION
.................................................
..........................................................
GENERAL
SPECIFICATIONS
......... ~ .........................................
UNPACKING AND.INCOMING INSPECTION
INITIAL SETUP
...............................................
THEORY OF OPERATION (BLOCK LEVEL)
...........................
GENERAL
..........................................................
.........................................................
POWER-ON
CHANNEL-SELECTION
PROTECT-DELAY
SIGNAL MNEMONICS
................................................
....................................................
......................" ..........................
SECTION 5
DIAGNOSTIC TESTING PROCEDURES
...............................
5. 1
5.2
SECTION 6
................................................
PRELIMINARY CHECK
PRINTER/PLOTTER DIAGNOSTIC
.......................................
TROUBLESHOOTING
.............................................
1-1
1-1
1-2
2-1
3-1
4-1
4-1
4-1
4-1
4-2
4-2
5-1
5-1
5-1
6-1
SECTION 7
BILL OF MATERIALS ••••••••••••••••••••••••••••••••••••••••••• 7-1
SECTION 8
SCHEMATICS
.................................................. 8-1

III.C.O.M-0

-
I

III.C.O.M-0
SECTION 1
e DESCRIPTION
1.1 GENERAL
The Model 2211M Printer/Plotter Multiplexer is a modified version of
the Model 2221M Printer/Plotter Multiplexer. The 2211M Multiplexer
permits a single printer or plotter (except the Model 2212 and Model
2232A/B Flatbed Plotters) to be shared by up to four units: 2200A, B, C,
S, T, VP, MVP [Central Processing Units (CPU's)]; 2200E [Portable
Computing System (PCS)] ; PCS2/2A; 2200F [Work Station (WS)] ; and 2236D/DE
Interactive Terminals.
NOTE:
Hereinafter, the units listed above will be
refe!'red to as
11
CP/WS", and "printer/plotter"
will be represented by "PIP".
As of the date of this manual, Wang Laboratories does not sell the
2211M Multiplexer for the purpose of connecting it to a VS CPU;
furthermore, the Home Office Customer Engineering Group does not support
the VS/2211M configuration.
The 2211M Multiplexer is packaged in a chassis that contains the
digital logic, channel indicators, channel-select switch, aPd power
supply. Five 36-pin female connectors accept the P/P and CP/WS cables.
Four 12-foot (3.7-meter) CP/WS interconnection cables are supplied with
the multiplexer.
1-1

III. C.O. M-0
1.2 SPECIFICATIONS
Required Supply Voltage:
115 or 230 volts C,:t10%), ac, 50 or 60 hertz C.:t1 hertz)
Power Consumption:
25 watts
Heat Output:
85 BTU/hr
Fuse Rating:
115 volts -6/10 ampere, 250 volts, slow-blow (WL #360-1006SB)
230 volts -3/10 ampere, 250 volts, slow-blow (WL #360-1003SB)
Cable Description:
Ac Power Cord - 6 ft (1.8 m)
CP/WS Inter-connection Cable - 12 ft (3.7 m) (WL #220-0105)
Operating Environment:
Temperature -50°F to 90°F (10°C to 32°c)
Relative Humidity - 30% to 80%, non-condensing
Dimensions of Chassis:
Height - 5.5 in. (13.8 cm)
Width - 8 in. (20.0 cm)
Length -11.5 in. (28.8 cm)
Weight - 15 lbs (6.7 kg)
1-2

III.C.O.M-0
SECTION 2
UNPACKING AND INCOMING INSPECTION
Before unpacking the unit, visually inspect the shipping container
for any indications of shipping damage {crushed edges or corners,
punctures, tears, etc.). If any shipping damage is found, file an
appropriate claim with the carrier involved.
Open the shipping container and remove all packing material. Remove
the unit from the shipping container and place the unit on a flat, sturdy
surfaae. Once again visually inspect the unit for damage. If any
shipping damage is found, file an appropriate claim with the carrier
involved and notify the Wt Distribution Center (Department 90), Quality
Assurance Department, Tewksbury, MA. 01876, of the nature and extent of
the damage, making arrangements for equipment replacement, if necessary.
Four 12-foot (3.7-meter) CP/WS interconnection cables should be
included with the unit. Inspect each cable for damage.
2-1

'

III. C.O .M.:..o
SECTION 3
~ INITIAL SETUP
A. Remove the six screw8 that secure tte multiplexer cover to the
chassis and then remove the cover of the unit. Inspect the unit for
damaged assemblies, loose hardware and/or solder splashes.
B. Ensure that the ac line voltage and frequency provided at the
installation site is correct for the unit. (The line voltage and
frequency at which the unit is set to operate is indicated on the
unit serial number tag; refer to FIGURE 3-2.) Verify that the
voltage-select switch (ref: FIGURE 3-3) is set properly. Verify
that the multiplexer ac power ON/OFF switch is in the OFF position.
The ac power cord may now be plugged in.
C. Place the ac power switch (ref: FIGURE 3-2) to the ON position. The
POWER indicator and the channel #1 (CH 1) indicator on the front
panel should light.
D.
Check +5VR with a digital voltmeter (dvm). This may be done by
placing the negative lead of the dvm on pin 7 of L1 and the positive
lead on pin 14 of L1 (ref:
FIGURE 3-4). Ensure voltage is between
+4.8V and +5.2V. There is no +5VR adjustment.
E. Place the multiplexer ac power switch to the OFF position.
F. (Refer to FIGURE 3-1 and FIGURE 3-5.) Plug the I/O cable that is
attached to the printer or plotter into the jack labeled "I/O".
Using the CP/WS interconnection cables supplied (WL# 220-0105),
connect the CP/WS designated 111 to the jack labeled "CH 1
11
; connect
the 112 CP/WS to "CH 2
11
, the #3 to "CH 3", and the 114 to "CH 4
11
•
G. Place the multiplexer ac power switch to the ON position and run all
appropriate (printer or plotter) diagnostics on each system channel
(ref: Diagnostic Testing Procedures, Section 5). After each channel
has been tested, replace the cover of the unit.
3-1

CHANNEL ill
(CPU ii 1}
JACK
CHANNEL 114
(CPU 114)
JACK
FIGURE 3-1
I/O
(PRINTER/
PLOTTER}
JACK
2211M; FRONT VIEW
CHANNEL-
SELECT
SWITCH
POWER
INDICATOR
CHANNEL 1/1
INDICATOB
CHANNEL 1111
INDICATOR
H
H
H
.
n
.
0
.
f
0

SERIAL fl
TAG
FIGURE 3-2
2211M; REAR VIEW
A.C. POWER
SWITCH
H
H
H
•
n
.
0
.
'f
0

III.C.O.M-0
VOLTAGE-
SELECT
SWITCH
FIGURE 3-·3 VOLTAGE-SELECT SWITCH
3-4
•

w
I
U1
FIGURE 3-4 210-7430 PCB; +5VR CHECK POINTS
L1-14
+5VR
CHECK
POINTS
L1-7
1-1
1-1
1-1
•
n
•
0
•
'f·
0

w
I
O'I
WL 1/220-0105
*CP/WS 113
*CP/WS 114
APPROPRIATE
_...,___PRINTER/
PLOTTER
I/0 CABLE
F
a
•
•
2211M
MULTIPLEXER
•
:
*2200A, B, C, E, F, S, T,
VP, MVP; PCS2/2A; 22360/DE
**
PRINTER/
PLOTTER
**NOT 2212
OR 2232A/B
FIGURE 3-5 SYSTEM CONFIGURATION
H
H
H
•
n
•
0
•
=f
0

-

III.c.o.M~o
SECTION 4
THEORY OF OPERATION (BLOCK LEVEL)
4.1 GENERAL
The 2211M Multiplexer controls access to the printer or plotter by
means of select circuitry that is regulated by a channel-select switch.
This manually operated switch determines which of the four possible
CP/WS's will have exclusive access to the P/P. At power-on, the
multiplexer automatically selects channel #1. Incorporated into the
multiplexer electronics is a four-second channel-select delay that
prevents inadvertent output from a bypassed channel while the desired
channel is being selected.
4.2 POWER-ON (Reference FIGURE 4-1.)
Power-on sets the channel-selection counter (L3), which is made up of
two 7473-type flip/flops wired to count from '0' to '3' in binary, to the
'clear' state (00
2
). This action lights the CH 1 indicator, and
channel #1 is selected for printer access. (See following Channel
Selection theory.)
4.3 CHANNEL-SELECTION (Reference FIGURE 4-1.)
When the channel-select switch is depressed, the select flip/flop
(L13) 'sets', and then 'resets' when ~he switch is released. The pulse
provided by the select flip/flop output (pin 6) clocks the
channel-selection counter. A count of '1' causes the LED decoder (L2) to
illuminate the CH 2 indicator. At the same time, the outputs from the
channel-selection counter• allow the eight data bits, the data strobe bit,
and the prime bit from CP/WS #2 to pass through multiplexers
(L4,7,8,9,15) to the printer. The channel-selection counter outputs also
allow the P/P status bits to pass through de-multiplexers (L5,6,16) to
CP/WS #2.
4-1

III.C.O.M-0
Operation for other CP/WS channels is similar to that described
above-- with a channel-selection counter output of 00
2
selecting
channel 11, 10
2
selecting channel #3, and 11
2, channel #4.
4.4 PROTECT-DELAY
(Reference FIGURE 4-1.)
When the channel-select switch is depressed, the protect-delay
circuitry (L17, 18) produces a 4-second pulse. This pulse disables all
multiplexer and de-multiplexer outputs for that 4-second protect
interval. This design feature ensures no inadvertent output from a
bypassed channel while the desired channel is being selected. Four
seconds after the desired channel is selected, the 2211M Multiplexer will
enable the data and status lines to the PIP.
4.5 SIGNAL MNEMONICS
ACK
BUSY
CLK
D1 - D8
DSTB
FAULT
FAULT1-4
PO
PRIME
SL
Acknowledge from PIP; buffered acknowledge to CP/WS
Busy status from P/P; buffered busy status to CP/WS
Clock from PIP; buffered clock to CPIWS
Data lines from CPIWS; buffered data lines to PIP
Data strobe from CPIWS; buffered data strobe to PIP
Fault status from PIP
Fault status to CP/WS
Paper out status from PIP; buffered paper out status to
CPIWS
Prime line from CPIWS; buffered prime line to PIP
Select line from CP/WS; buffered select line to PIP
4-2

j_
0--
SELECT
SWITCH 1----<
F/F
113
CHANNEL
SELECTION
COUNTER
L3
PROTECT
DELAY
CIRCUIT
117,18
FIGURE 4-1
LED DE-MUX
& DRIVERS
Ll,2
DATA -DATAa
'-------...DATA
1
sTROBE,
PRIME MUX
L4,7,8,9,15
t>RTR/PLTR
JS
BLOCK DIAGRAM
4-3
III.C.O.M-0
PRTR/PLTR