IBM 727, Manual Of Instruction

Page: 133 / 163

L
A
R-21
Rwnd P . U .
■■■
A
B R-3
Ld . Rwnd. 1
B
C R-9 Ld. Rwnd. 2
D R—12
Rwnd. Status
C
E R-2 Clutch Status 1
B
F R-28
Clutch Status 2
B
G DP2
Capstan Motors
E
H Head Lock S o l.
E
1 1/2 Brake Left
E
J 1/2 Brake Right
E
K T . l . & L .P . Lights
F
L Capstan Out M icro-Sw .
M Capstan In M icro -Sw .
N R-27
Go Status
P DP4 Take Up Motor S t .
Q Head Down M icro -Sw .
R Head Up M icro-Sw .
S C ol. Switches
T R-5 & R - 6 C ol. Sws.
U DP3 Rewind Motor
V R-23 High Speed Rwnd.
W R-24 H . S. Rwnd. In tlk .
X Tape Break Light
Z DPI Take Up Motor Rev.
a R-4 Arm Switch
b R-8 Delay Timer Motor
c Time Delay Points
d +48 Volts to Man. Rev.
e +48 Volts to Man. St.
f R-25LP Load Point
g Arm Switch
W
V
'wmm— mmmmmm
F
W
B
B
Depress Load Rwnd. Button— J *
Capstans Start Retracting
—
I
A
Capstans Fu lly Retracted— I f
Head Starts Up— »
Relays Up throughout
this sequence.
HD 1 , 2 ,3 ,& 4
R-13 , R-17 , R - l , & R-7
The Bellows Switch and
Door Interlock Switch are
closed throughout the
sequence.
Head Fu lly Up— f f
Tape Out of C ols.-I
Arm Sw. Operates— 1 t
Head Starts Down-»
j
Tape Moves Into Cols
Head Fu lly Down
J
j
Capstans Start O u t— I
Capstans Fu lly Out
A t Load Po int----
Stops-
J
F IG U R E 3 7 . H IG H - S P E E D R E W IN D , 727 M O D E L III