Heathkit H14 User manual

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HEATHKIT
MANUAL
for the
LINE PRINTER
Model H14
OPERATION
HEATH COMPANY· BENTON HARBOR. MICHIGAN

HEATH COMPANY PHONE DIRECTORY
[phone]
(616) 982·3307
[phone]
(616) 98:!-3309
[phone]
(616) 98:!·3884
[phone]
The following telephone numbers are direct lines to the departments listed:
KitOfdenl and delivery infoonatloo _(616) 982-3411
Croon _. .. . . (616) 98:!-3561
Replacement Parts _(616) 982-3571
T9Chnical Assistance Phone Numbers
8:00A.M. 10 12P.M. and 1:00 P.M. to 4:00P.M., EST, Weekdays Only
AlC, Audio, and Electronic Ofgans ... .•. . .. . .. .(616) 98:!-3310
Amateur Radio. .. . .. . .... . ... .. .. .. [phone]
Test Equipment, Weather Instruments and
Home Clocks _ , , , , .. , .. ,.
Television ............•.............. , .. , .
Aircraft, Marine, Security, Scanners.
Au1omotive,
Appliances and General Products •.. ,
Compllters -Hardware ,
Computers -Software:
Operating Systems, Languages, Utilities.
Application Programs ............•.......•.....
Heath Craft Wood Works .... , ...............• , .....
~~~~~~~~~~:~~:;~~~~~~~~~~
I
~i
Consumer Protection Plan for Heathkit Consumer Products ___
Welc(lme to tile Heath lamlly. We believe you WIll enjoy assembIIf'g your krl aod 'HIM be plGllsecl with Its
perlormance Please read this
Consum. Protectlon Plan carefully, It is a'LIMITED WARRANTY" as
~ defined In the U.S Consumer Product Warranty and Federal Trad. COmmlsslon ImprOllement Act Thli ~
25:>= wa(Tanty orvesyou specdk: legal rlgh~. and you may also have Olher rtghts \'Io'hlch vary Irom Slalll to Itate :;g
gs: Heath'a Responaiblllty I
=<"gs: PARTS -Replacements for 11lCI0l)' dllfeetlve parts Win be StlppIled tree lor 90 da'fll Irom dale of purchase, Repla,*"anI partS are
~ warranted lor Itte remaining portionof t.... onglnaJ warrantyperiod You canobtain warrant)'paru:dIrect Irom Healh Company bywnllng
or telephonlng UI et [phone]. And _ 'HIM pay shipping charges to gel1hOH partllO you an'(Where In !he world
52S: SERViCe LABOR -Foraperiod of 9Odaysfrom the dale of puretlue any malfunction caused bydefectnleparts or error lndnlgn WI.
c;:(>- becorrectad al no cltarge toyou. YOlJ mUll del/Var Iheunit at your expeostl 101he Heath laetory. any Healhlat Electronic Center (unllSol
S?S: Ventechnology Electronics Cofporallon). or any 01 our llU!honlad OIIllflIeaB dillnbutora
~ TECHNICAL CONSULTATION -Youwdl,ecelvelreeconsultalionon any problem you might encounter Iflltleassemblyoruse oIyOlJr
g:>: Heathkit prOduct Just GrOp us • ~ne or give lit acall Sorry. we cannot accept colItICi caUs.
~~
NOT COVERED -The correction of assembly arrOl'S. adjustments, cahbrahOfl. and damage due to misuse. abUse or negligence are
~ covllll'lId by th. warranty. Un 01 eorroIIve soldOI' and/or!he unauthorlledmodl!lcaIlOfl 01 the procluC't or of any lum/shad cornponen.
wiN VOid this wananty in Its entJrety. nus warranty does nOllndude,elmbul18m8f'ltlor Inconvenience losIO! use, l<ustomer auembly.
set-up llme.
or unauthorl:tad servICe
ThI,warranty coverlonlyHeath produetl and IS n(II e)l\endad 10 OIlier oqlllpfTlent or components thaI a ClJstorner uses In COfljllncllon With
g:;: OUfprOduCla
~ SUCH REPAIR AND REPLACEMENT SHAU BETHE SOLE REMEDY Of THE CUSTOMER AND THERE SHAU BE NO LIABILITY ~[I
~ ON THE PART OF HEATH FOA ANY SpeCIAL, INDIRECT. INCIDENTAL OR CONSeOUENTlAL DAMAGeS.INCLUOING BUT NOT
~
UMITED TO ANY LOSS OF BUSINESS OR PROFITS, WHETHER OR NOT FOASEEABLE
SomeSlatet
do oot allow 1M ellcllJsion or IimltallOfl oflnl;ldental or con5eQUential damages. 10ttla abOlle limitation or &llCluslon may nol
ex>- """ '" ,~. ::::
6-?" Owner's Responsibility :$2!.
~ EfFECT1VE WARRANTY DATE -WilfTanty beglns on Ihe daleof 'Ifst consumer purchase YOlJ must supply a C<lPV of your proof 01 ~
~ pufd\ale when you request warranty semce or parts ~
F>r ASSEMBLY -Before seelcJng warranty service, you should complete the assembly by carelully following Ihe manuallnslruetlonl. ~
e::,.;:- Heathkit SeMce agenoes canf'lOl complete assembly and adjllllments thaI ere eullom9l'1 respor1S1blfily ~
~ ACCESSORY EQUIPMENT -Performance maJIunclloos Involvlf'g otll81 non·HNlh aecassory equipment. (ant8l1f"lal. audlo compo- ~
~ nent•. compuler penpherals and software, etc) are not COII.ad by thlll warranty and are the owner'. responsiblllly :s::=5
~ SHIPPJNG UNITS -Followthe pacl«ng lostl'UCllO!lS published In thea,ssembtymanuals. DamageduetoiNtdequatepack!ngcannot be ~
g: rap8lred undOl' warranty :::::g
~ II you 1lI8 notllltfslled W1thoor service {warranty or Olherwis.ejorOlJ' Pfoduets. wfltecllflldlyloourDirector 01 i
~~~~~~~~~;b~:~~:'~:~~~~~~~~bb~bb~~

•Heathkit® Manual
for the
LINE PRINTER
Model H14
•
•
OPERATION
595-2'73-02
•
HEATH COMPANY
BENTON HARBOR, MICHIGAN 49022
Copyrigh1 ©1971
Heath Company
AJI Rights Reserved
Prtnled In !he United ~" 01 Amerk:e.

•
Page 2
---------------~
TABLE OF CONTENTS •
Introduction .......•......•..•....•........... 3
Specifications
.... :........................... '"
System Configuration .........•......•........ 6
Maintenance ..............•....•............ 15
Circuit Description .........•....•. : 16
Recalibration 19
In Case of Difficulty 21
Troubleshooting and Repair Precautions 22
Troubleshooting Chart 23
Step-by-Step Testing _ 26
Circuit Board X-Ray
Views .... _ .......................•..•..... 29
Semiconductor Identification Charts 30
Parts List 37
Schematic .......•...•..•.............. (Fold-in)
•
•

Page 3
~---------------
•INTRODUCTION
The Heath Model H14 Line Printer is a computer
peripheral that provides computer readouts in hard
copy form. The Printer uses an inked ribbon and an
impact-type printer to print 8dot matrix on regular
paper. The following features make the Printer very
versatile:
•Microprocessor controlled functions and
timing.
•EitherRS·232C or 20 mA current loop serial
interface (user selectable).
•Both
upper and lower case characters. •Handshake control signals.
••Full 96·character ASCll font.
•Sprocket paper feed with adjustable spac-
ing.
• Paper out and jammed detectors that pre-
vent damage. or loss of data, or both.
•Electronic form controls.
The modern design assures excellent reliability,
and
the handsome styling complements the Heath Com-
puter Series.
For system configuration
(how to connect you.r Printer to your Computer)
information, see Page
6.
•

•
Poge 4
--------------"~
SPECIFICATIONS
PRINTOUT
•
Character Set
Character Format _
..•....•....•.•....•.....
Printing Method ., ... , ...•....•. , ....•..........
Character Height .......•....•....•.•....•....•..
Line Spacing ..........•........•..•...•....•...
Character Spacing ...........•....•...........•..
Printing Speed ........•.•....•.•....•....•...•..
96 character AScn. upper and lower case.
5x7dot matrix.
Impact. Uses 0.5 inch wide nylon inked ribbon on 2
inch diameter spools.
0.110 inches.
6lines per inch. 8lines per inch selectable by
software.
10 characters/inch (80 columns).
12 characters/inch (96 columns).
16.5 characters/inch (132 columns).
10 and 16.5 characters/inch are both hardware and
software selectable.
12 characters/inch is software selectable only.
Initial time per full line is approximately 1.75 sec-
onds on 60 Hz power line and
2.1 seconds on 50 Hz
powerline. Print head temperature is monitored after
each lineand thenlimited by slowing orstopping the
printing.
The maximum throughput is determined by
print density and ambient temperature. The
maximum instantaneous printing rate is 165 c.p.s.
•
•

Page 5
~I-_----------------
•
•
PAPER
Paper Type ......•..................•......•....
Paper Feed .............•....•.•....•......•....
Forms Control ..........•....•......•......•....
INTERFACE
Electrical ...........•.•....•....• : .....•......•.
Connector ..........•......•....•...........•...
Data Format .............•....•......•....•.....
Character Code .........•....•.•..•.•......•.....
Line Buffering .....................•.•....•.....
Baud Rates ..........•.•....•....•......•....•..
PHYSICAL
Overall Dimensions
Net Weight
....................•...........•....
Ambient Temperature ........•....•.•...........
Power Requirements ..........•....•.............
Edge-punched f8.nfolded forms. 3.0" to 9.5" wide and
maximum thickness of 0.006".
Sprocket.
with adjustable width.
11" form isselected at power up. Anyfotm depth from
0.021" to 1365" may be electronically selected.
Serial RS-232C or 20 rnA
current loop. Handshake
control signals (reverse channel or busy signal).
25
pin male EtA connector on 6foot cable.
Asynchronous bit serial; 1start. 8data. 2
stop bits on
110
baud and 1stop bit on all olhers.
ASCII.
256 Characters.
110.150.300. BOO, 1200,2400, or 4800.
18-1/3" W x 14-1/3" D x 4-4/5" H
(4B.5cm W x 36.3
cmD x12.1 cmH) less papertray.
25 lb •. (ll.3 kg•. ).
10"C to 40"C.
100-135 volts 50-60, or 200-270 volts 50-60 Hz, 100
watts
maximum .
•
•••
The HeathCompany reserves the right to discontinue
products and to change specifications at any time
without incurring any obligation to incorporate new
features in products previously sold.

•
Page 6
------------------QMIIIIII.j
SYSTEM CONFIGURATION
HEATH SYSTEM CONFIGURATION
•
Your Line Printer communicates with yourcomputer
throughaserial I/O cardandmay be operated
at either
RS-232C signal levels (see Pictorial 2, Page
9) or at 20
rnA current loop levels (see Page 7). The 25-pin "D"
connector conforms to RS·232C standards and will
mate with most equipment which conforms to this
standard. Adaptor cables to convert from earlier
Heath equipment connectors to the RS-232C connec-
tors are available from the Heath Company.
Set
the LinePrinterbaudrate (4800 isrecommended).
Then set the Line Printer and the computer I/O card
(do not use the H8-5 Serial I/O card; the H8-4 Mul-
tiport Serial
110 card is recommended) for the same
type signal levels (RS-232C or
20 rnA current loop) as
described in the following sections (RS-232C is re-
commended).
Refer to your serial interface manual for information
on how to set baud rates, addressing, vector inter-
rupts, and signal levels on the serial card. Refer to
yourSoftwareManual under"SystemConfiguration"
for information on where to set the serial and address
(PORT) and vector interrupt to communicate with
this Line Printer.
PRINTER BAUD RATE SELECTION
Toselectadesired baudrate, placesections
5, 6, and 7
of switch SW102 (located on the circuit board inside
your Printer) in the proper positions as indicated be-
low.
The baud rate will be updated upon going from
"off line" to
"on line," or during power up.
BAUD RATE SWITCH SECTION
5 6 7
110 1 1 1
150 01 1
300 1 0 1
600 0 0 1
.
1200 1 1 0
2400 0 1 0
4800 1 0 0
9600 (Do not use) 0 0 0
PRINTER SIGNAL LEVELS SELECTION
Wireyour Printerfor eitherRS-232C or
20 rnA current
loop operation as described below.
RS-232C Operation
To use the Printer on RS·232C operation, you must
install jumper wires between circuit board holes Jl14
and }115, and
}109 and }110.
Proceed to the "Operation" section.
•
•

Page 7
2.0 volts max.
2.0 rnA max.
20 rnA min.
Voltage
drop (marking)
Spacing current
Marking current
Operating levels for
current loop operation are:
Transmitter
~~--------------
To use the current loop, install jumper wires between
circuitboard holesJ113 and J114, and Jl10 and Jl11.
Current loop operation of data terminal
equipment is
normally
done in the passive mode. This requires the
installation of jumper wires between ]101 and J102.
and J105 and J106.
20 rnA Current Loop
•
The SchematicDiagram and previouscable lead iden-
tification chart indicate
the polarity of current loop
signals for passive operation. For active operation,
the polarities of lhese signals are reversed. Remove
the passive loop jumper wires
and then install jum-
pers between:
Receiver
Voltage drop (marking)
Spacing current
Marking current
2.7 volts max.
3.0 rnA max.
15 rnA min.
•
J101 and 1103\
Input
P02 and J104
J105 and 1107\
Output
Jl06 and J108
Proceed to the "Operation" section.
•

Page 8
------------~
NONHEATH SYSTEM CONFIGURATION
•
INfERF ACING
INTERFACE
CABLE
•
I
'I
- 1
~
1~
IT
.~
If;-
F,.
5
.r;-
i;o
5~
"
-:-
r;;-
.~
r,-
s~
i;o
-10
RTi
~
.:..:
~~
D~
R 14
~
o 15
c!.
peND
our
sou
N.C
SIN
OUI
RT
N.C
C1
IN
os
IN
SCN
OT
RLS
PICfORIAL 1
NOTE: If you use abaud rate higher than lID, the
system must use handshaking. See "Printer Hand-
shaking" below.
The following chart describes the leads of the I/O
cable. Also, see
Pi~orial 1.
SIGNAL NAMEI/O Pin /I LEAD COLOR
51
ON CIRCUIT
BOARD
25·PIN "0"
CONNECTOR
lifO CONNECTOR I•
1
2
3
•
5
6
7
8
9
10
11
12
13
,.
15
16
17
18
19
20
21
22
23
2'
25
Black
Red
Orange
Black-white
Black-green
Black-blue
White-red
White-blue
Not Used
Not Used
Not Used
Not Used
Not Used
White
Green
Blue
Black·red
Black-orange
White-black
White-green
Not Used
Not Used
Not Used
Not Used
Not Used
Protective ground
(P GND)
RS-232C Serial Output (S OUT)
RS-232C Serial Input
(S IN)
Request to send (RTSl Output (Printer Busy)
Clear to send
(efS) Input·
Data set ready (DSR)*
Signal ground (SGND)
Received Line Signal Detect (RLSD)*
Current loop output -(OUT -)
Not used
Current loop output +(OUT+)
Not used
Current loop
input - (IN -)
Current loop input + {IN +1
Data terminal ready
(DTR) output •
-These Jines not required for Printer operation.