Video Line Driver - Texas Instruments 990 Manual

J}rJs-\ _ _ _ _ _ _ _
~
945424-9701
FROM
VIDEO
OUTPUT
LOGIC
(A)136282
NVIDL
CSQ
+
Figure 1-32. Video Line Driver
NTRL
~~
r
CRA9Q
TO POWER/
LOGIC PWB
BTL
TO CRU INTERFACE
~----LOGIC
FROM CRU INTERFACE LOGIC
l ____
...._O_-_- . . - - - '
TKBL
{
CRAOQ
FROM CRU
INTERFACE
CRA1Q
LOGIC
VIDEOQ
VSQ
FROM VIDEO {
OUL6~6
HSBQ
AQ
(A) 136283
FROM KEY-
BOARD LOGIC
0
TEST INPUT
MULTIPLEXER
FROM CRU
INTERFACE
LOGIC
KBTL
0
PREVW1Q
BTSL
0
NLEDL
(*)
0
Figure 1-33. Model 911 VDT Built-In Test Logic
1-51
BKBINL
TO KEYBOARD
LOGIC
BBTSL
TO CRU INTERFACE
LOGIC
RB
vcc
Digital Systems Division