IBM 1627 Manual page 30

'"
~
DRUM CIRCUITS
DRUM
COIL 2
DRUM
COIL I
DRUM DOWN
NEGATIVE INPUT
CLOCK DRUM-
OOWN-OUr
Z
DRUM DOWN·
POSITIVE INPU-
- 24V
C
.~
- - - - - - =9v- - -
SPARES
H F A
OW
---it
PI
~ ~32
~ .5<
~~~~
R35
1.5K
---------+--~+--+--~----------+-~-+--------------~+-~~~
R6
10K
R7
1.5K
cs
CRI2..!.
.I.:~
3
DRUM DOWN INPUT
c....::;ot :;;-_w
(MANUAL)
)C'W"\.- ,
t 1.5V
c_:·~
:::r.•• \ f
~-
D~UM CIRCUITS
'627 'oI\odel 2 waveforms
05
disployed on a 535 scope.
•..• c-aber on oscillogram corresponds to circled number
on scbemctic , Waveforms of the 1627 Modell and 2
ere idemiccl , However, the foster speed of the Model
I covses the wovefcrms shown below to be extended.
-"'e circled numbers on the block background indentify
the ec-,,e x'--s
··c
were observed to produce the
oscilbg:r:s. --e circled numbers on the white bock-
grounC --y: c.c-e :!;Ol':"esponding points where the some
wcve~ cc- ae ccserved , These duplications arise
beC1:7_""Se ~-
=:
''')f!
ciruitry is duplicated.
No
er-e-eo- ••. ; :.s -coe
""0
mark all of the duplicated points,
-ec- "'~veforms shown are free- ~ :".' 'ili
:::ni c::e shown for illustration or
JI ~
'-.e •..• ;11
~r:rr •• ;t-
the using system.
-e--Ov -Ov
-0.
-Ov
o
---_.
o
--
....... ....
..
-.
--
...
--
..
j • _ •..•.•
------~;---.-.--.
-=
o
o
Connector PI-Pin W
Sync External
Plus
on PI-Pin
W
2OI-Is div., 5v/div.,
DC
CR4 Side of C3
Sync External
Plus
on ?'
_::t.,
20
ps/div.,
2 v/div .• X
RI2
Side of
C3
Sync Externc ::..5::r:- '1n .'I
20 !-Is/div" :5 ,
c, •• ,
X
~~::::=
5.-:
~-e-.c
Plus
on
AIAI3R
-vs,
= _"
2., div .
-e--Ov
-Ov
o o -
...........
.
~--.------
..
'--
---+-~--
-----
o
,.--,.--.,- ~
-0 •
Drum Down Manual lnp..tt at Pi-Pin X
Sync External Plus on PI-Pin X
2 ms/div., 5 v/div., DC
Input to
C5,
Sync Internal PI..s
2ms/div., 2 vdiv., X
Bose of Q3
Sync Internol
Plus
2 ms/cliv., 2 v/div.,
ex:
Ecs.eoiQ4
$,-c Internal Plus
2-s
oiv.,
2
v/div.,
DC
-0. -Ov
$
L
~-:+ -
-0. -0.
•
o
~.------.
! ;
! ~
I ,
i : .
---_.!--_.. "-
:r""""""",,""""'-
•
Base of Q20
Sync Internal Plus
50 ms/div., 2 v/div., DC
Collector of Q20
Sync
Internol Minus
20 ms/div., 5 v,div., DC
Collector of Q16
Sync Internol Plus
20
ms/div., 5v/div., DC
Collector of
018
Sync Internal Plus
50ms/cliv., 10 v/div., DC