MITS altair 680b User manual

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Third Printina~ Februarv, 1977
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r.t:::t' 2450 Alamo S.£:. Albuquerque, New Mexico 87106

ALTAIR 680B
MAIN EQARD
APRIL, 1976
BAG 1
l 74LSOO
2 74LSOl
274LS02
774LS04
1 74LS10
374LS20
474LS30
l 74LS73
1 74LS74
4 40.50 (4010)
14449(4009)
474367 (8T97)
134702
BAG 2
7 4700hm
1100 Ohm
347 Ohm
133K Ohm
510K Ohm
5 303K Ohm
4 lK Ohm
1 150~ 2t1
2 3300hm
1 lOtJ1 Ohm
2 220 Ohm
1 180 Ohm
122KOhm
R.L\G 3
82102
1 p-~.cI..'\ (1702A w/rvbnitor)
16800
16850
17805
4 4e 7K o.r:u.-n RP
II 4e 7K Omu
2#26 Wt-J. te Wires
2#6 Solder Lugs
101069
101101
101136
101042
101133
101134
101135
101119
101088
101105
101104
101040
101099
101927
101924
101922
102053
101932
102085
10.1928
101961
10192:6
102079
101925
101998
101933
101107
P-aACIA
101096
101098
101074
101999
101930
103060
101801
:BAG 5
4 n~4004
5 ThT914
1 lO~ OV Zener
·1 VJ-048
1 2e 4576lJ!Hz Crysi:al
1 2e OOOOMHz CZystal
BAG 6
2CCS-4410
4 2~12907
1TIP-"30
2 Heat Sink (Large)
1 Heat Sink (Small)
3 6~32 x 1/4" Screw
3 6*=32 Nut
3#6 ~o~ ~1asher
B.~G 7
36 .luf 12v
BAG a
1 .OOluf
1 .Oluf
2 1 ~ Ouf (Tantalum)
2lOOuf
1 50pf
2 56pf
2430pf
3 35uf lSV
13000 or 3300uf
B.2\.G 9
140 Pin Socket
524 Pin ~'k:et
9 16 PLTl 8ocl<et
2Sro.all Rubber Feet
2 4-40 x 1/2 Screw
2 4-40 he..x nuts
MISC.
100718
100705
100717
100711
101741
101855
102806
102804
102821
101870
101870
100917
100933
100942
100348
100328
100321
100325
100313
100331
100317
100322
100326
100315
102106
102105
102103
101751
100903
100932
i
1100199

ALTAIR 680B
DISPLAY BOARD
PARTS LIST
APRIL, 1976
4 .
s2uF lOv
5 •1 uF lOv
BAG 4
24 1.5K 1/2W 5%
BAG 5
1" 10 Ohm ~l 5%
3 22K 1 /2W 5'~
4 4G7K 1/2W 5%
2 47K 1 /2t~ 5%
3 lK 1/2W 5%
2 lOOK 1/2W 5%
2 10K 1/214 5%
8AG.6
25 SPDTS\'Ii tches
2 MOr~swi tches
1 lOO-pin connector
1
PC board
101102
101104
101080
101078
'·00702
100355
100348
101946
101950
101933
101930
101934
101928
101936
i01932
102366
102367
101864
100182
ii

ALTAIR 680B
OEE ASSEMBLY
APRIL, 1976
L
2
I
L
~
1.
l
~
4
5'
L
1.
5
HBK Fuse Holder
eOluf/lkv
1/2SB Fuse
SNitch ST1-1C
TeJ:minalStr~p
Strain Relo
5 Pin-~.ale Conne
5 Pin-Female Con..,,_
small Rubber Feet
TeJ:minal Pins (Large)
5 Pin~Miniature lA..ale Conn.
SPin--Miniature Female COnn.
Terminal Pins (Miniature)
101813
100305
101771
102366
101713
101719
101872
10187'3
101751
101769
101671
101672
101723
2 6 .... 32 x1 1/8
11
Screws
9; 6- 32 x 1/2 USc:retvs
26-32 x 3/8" Screws
1 6- 32 x 1/4 It Scre\ll
44 .... 40 x 3/8 II Screws
2 4-40 x 1/2
11
screvi'S
18- #6- 32 Nuts
6 #4-40 Nuts
#6 IDc]<:, ~vashers
4 #4 I.oc.le V'Jashers
4 Spa~r 1/4 Long
1Back Panel Label
1- CorJIlector Cover
1 oz. of Heat Sink Grease
4 Lengths of 44-66 Solder
1DB-25S PLTl Connector
rrrsc.
100936
100918
100925
100917
100908
100903
100933
100932
100942
100941
101826
101875
101874
102112
1
1
1
1
1
1
1
t
.,
r
Binder
TransfOJ:Iner
Cord (Pa.,;er)
case
680B Theory
6808 Assembly
680B Operators
6808 tt'loni tor
i ; i
101532
102609
101742
100519
101580
101584
101581
101582

ALTAIR 680b
ASSEMBLY MANUAL
Table of Contents
I. ASSEMBLY HINTS •QC$ e.
II. MAIN PC BOARD ASSEMBLY c
II Ie DISPLAY/CONTROL BOARD ASS8'1BLY •0
IV u BACK PANEL:ASSEMBL Y ~ 0 • 0 0 0 &eee
V• FRONT PAN,E:L AND FINA:L CASE ASSEMBLY
;v
Q0$ • page 3
~ page 13
page 37
Q page 47
o p,age 59

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2 (blank)

PRlr~TED CIRCUIT BOARD VISUAL IriSPECTION
It is recommenqed that avisual inspec~
ticn of the PC Board(s) in your kit be
made before beginning the assembly pros:.
cedureso
Look for etching IKbridgesUor etching
liopensu in the printed circuit lands,
as shown in the drawings below:
Example of an
Etching HBridge
ll
Example Qfan
-Etching ItOpenu
t;.:;:.:.:.:.;.:;:;:;:.:.;.,.c; • .; :,:.:,:.:::<~t .•.. , , ' .•• ~.:.;;:.:.:.;:@
ThiscQuldals,o appear as a
I1hai rl ;<neUcuto
Athorough visual inspection will elim~
in~te one possibility for errors, should
the board not operate p'roperly after it
is assembled. Troubleshooting efforts
may then be conc,entrated elsewhere.
3A

ASSEMBLY HINTS
Before beginning the construction of your unit, it is important that you read
the liMITS Kits Assembly Hints
U
booklet ;'nclud'e/d with your kit. Pay particular
attentio·n to the section on sol·dering, because most problems in the Altair
occur as the result of poor soldering. It is essential that yo:uuse the corG;'
rect type of sol·dering iron. A 25~30 watt iron with ac.hisel tip (such as an
Ungar 776 with a7155 tip) is recommended in the assembly hints bo·oklete
Some important warnings are also in'clude:d in the hints booklet~ Read t·hem
carefully befo'reyou begin w·o:rk on you.r unit ~- failure to heed these w·arnings
could cause you to void your warranty.
Check the contents of your kit against the enclosed parts list to makes'ure
you have all the req,u; red components, hardware and parts 0 The components are
in p1 as ti cenve lopes; do n·at open th.em un~i 1 YO'u need the c:omponents for an
assem.bly step~ You will need the too'ls called for in· the I1Kits Assembly
Hi'ntsU booklet.
As you construct your kit~ follow the inst'ructions in the order th'at th:ey are
presented in the ass·embly manual 0 Always complete each sectio,nbefore going
on to the next. Two organizational aids are provided throughout the manual
to assist YOu.: 1) Boxe;d-off parts identification lists, with spaces provide:d
to check offt'he cam·ponents as they are installed; Z) Re.product·' ens C;lT tha
sil:k scree.nsshowing a) p·reviously installed compone:nts, b) components bei:ng
inst:al1e·d and c) components yet to be ·installed". (s,eebel~ow)
previously
installed
components
3

COMPO~reNT !~$TALLATION METHODS
Pages 5 through 11 of the Assembly Manual describe the
proper procedures for installing the various types of
co~ponents in your kit.
Read.these instr~ctions over verI carefully and refer
back to them whenever necessary. Failure to properly
install components may cause permanent damage to the
component or the rest of the ~~iti it will definitely
void your warranty.
lv10re specific instructions, or procedures of a less
general nature, will be included· within the assembly
text itself.
Under no circumstances should you proceed with an
asserr~ly stap without fully understa~ding the proce-
cures inv~lved. A little patience at this stage will
save a great deal of tL.i1e fuj,d potential "headaches"
later.
4

ICIDENTIFIC~~TION CHART
PIN 1PIN 1PINt
PIN 1
o
?INt 00
o
PIN 1
PtN1 0
PINY
INTEGRATED CIRCUITS (Ie's) C~ co~m WITH ANY oNE OF, OR A COMBINATION
OF, SE~lEPAL DIFFERENT MA.BKING.S. THESE MA&'l(INGS ARE VERY I~ORT1-~T IN
DETERMINING THE COR.."RECT ORIENTA'!ION FORTn~ Ie fs WHEN THEY F-FE PLAC~D
ON THE PRINIJ.'ED eIR-CUlT BOARDs. REFER 1'.0 THE ABoVE DRAWING TO LOCoZ\.TE
P!~I 1OF THE Ie 's, Thu'l USE THIS I·NF'ORMA'I'IO.N INCONJONCTION ~iITH THE
INFOFJ.~TION BELOW TO PROPEIt(.Y ORIENT EACH Ie FOR INSTALLATION 0
~1~..NING: INCORR:ECTLYORIENTED' Ie's MA.y CAUSE PEm-~TENT DAMAG:E!
.C
.. ~
"lir
E ,....-
.~
~
B
"'--"-
~
THE DRAWING ON THE LEFT INDICATES VARIOUS
METHODS USED TO SHOW THE POSITION OF Ie
vs
ON THE PRINTED CIRCUIT BOARDS Q THESE AP..E
SILK-SCREENED DIRECTLY ON THE BOARDG THE
ARROWHEAD INDICATES THE POSITION FOR PIN 1
wtmN THE Ie IS INSTALLED 0
5

MOS Ie SPECIAL HANDLING PRECAUTIONS
There are several MOS integrated circuits
contained in this kit. These Ie's are
very
sensitive to static electricity and
transient voltages. In order to prevent
damagi ng the.se components, read over the
following precautions and adhere to them
as closely as possibleo FAILURE TO DO SO
MAY RESULT IN PERMANENT D~MAGE TO THE Ie.
1) All equipment (soldering iron, tools,
solder, etc.) should be at the same
potential as the PC board, the assem-
bler, the work surface and the Ie it-
self along with its container. This
can be accomplished by continuous
physical contact with the work sur-
face, the components, and everything
else involved in the operationG
2) When handling the Ie, develop the
habit of first touching the conduc-
tive container in which it is stor-
ed before touching the Ie itself.
3) If the Ie has to be moved from one
container to another, touch both
containers before doing so.
4) Do not wear clothing which will build
up static charges. Preferably wear
clothing made of cotton rather than
wool or synthetic fibers.
6
5) Always touch the PC board before
touching the
Ie to the board. Try
to maintain
this contact as much as
possible while installing the Ie.
6) Handle the Ie by the edges. Avoid
touching the pins themselves as much
as possible~
7) Dry air moving over plastic can result
in the development of a significant
static charge. Avoid placing the Ie
near any such area or object.
8) In general, never touch anything to
the
Ie that you have not touched
first while touching both it and the
Ie itself.