Radio Shack PRO-2035 Service Manual page 68

IC12 BU2040F
Vss
DATA
CLOCK
00
01
02
03
Q4
. - - - - - - - - ( 1 6 3 ) - - - { 1 i ) - - - - - - - - ,
12-BIT SHIFT REGISTER
LATCH
lC13 M5291FP-600C
SWITCH COLLECTOR
SWITCH EMITTER
OSC
GND
DRIVER
PEEK CURRENT DETECT
VCC
COMPARATOR INPUT
8
7
6
5
IC14 TA78L05S
r-~--~--,~-,,-<..-6)INPUT
000
OUTPUT
A5
1. OUTPUT
2t
a'
06
8
2.COMMON
1 2 3
3. INPUT
At R2
R'
OtO
A6
Rtt
R3
COMMON
lC501 GRE-9312
See "Microprocessor (IC501) Port Format" on Page "74"
-6B-