Texas Instruments 990 - Page 47

r
-- --
---------
I
WHT
GRN
I
BUJ
BRN/WHT
I
CHASSIS
GND
r---------,
I
I
BLK/WHT
I
2
~
I
I
I
I
4 3
DOMESTIC
TRANSFORMER
SHOWN
p9-4
VIO/WHT
BW!WHT
-1
I
I
I
p9-1
I
ORN/WHT
I
p9-3
I
RED/WHT
I
I
PS-2
BRN/WHT
JS-3
JS-2
1
BRN/WHT
I
PS-I
JS-1
I
I
_J
I
120V OPTION
L ________ ....J
I
BLK/WHT
L
-- -- --
__ _J
I
------
--1
6 6
100V OPTION
NC)
BRN
I
I
I
RED
I
I
s s
WHT
I
I
GRN
4 4
I
I
CHASSIS
3 3
I
BLK
NC).
YEL
GND
I
~
PIO J10
I
GRN
I
2 2
I
1
BLK(WHT
Pl 0 JI 0
BLU
I
\f:'
I
I
I
I
I
I
RT
51
BRN/WHT
L
3 4
_J
----- --
-- -- -- -- --
(C)l 36272
I
I
I
I
I
I
I
I
L
240V OPTION
51
BLU rl, ORN/BLU/WHT
==c~~-G-:-:-~:-Y_E_L_C_H_.f!7_s_S_i 5---<2 : °',-------:-:_u_N,_::-~-~-:--:_:_:_""""' 4 FL 1
GND
4
0
3
-------1-------- .. 3
Fl
,-------
1
I
I
220V OPTION
•••
DECOUPLING
CAPACITORS
BRN/WHT
WHT
6
6
TO H-SYNC GENERATOR, PULLUP
RESISTORS, UART, REPEAT LOGIC,
AUDIO LOGIC, DUAL-GAIN VIDEO
AMPLIFIER, INVERTING AMPLIFIER
BRN
-,
I
RED
I
ORN
I
I
YEL
I
GRN
I
BLU
I
_J
BRN
--,
I
RED
I
ORN
*r------
1
--,
I
I
I
IDENTICAL
TO 240V
INPUT
I
I
FL1
c--:
I
I
I
L_
SERIES PASS
REGULATOR
-0001 ONLY
I
I
_J
I
I
I
2
YEL
GRN
Rl...U
I
I
I
L ________ _
-- -- --
_J
Figure 1-22. Model 911 VDT Power/Logic PWB Power Supply
Block Diagram
1-37 /1-38
Digital Systems Division