Canon Canola SX-300 series, Repair Manual

Page: 77 / 116

INTERNAL CIRCUIT, SIGNAL 5. PIN LOCATIONS
OF SEMICOND U C T O RS-2
~ -
- ouTRurs - v . - c o r e r
T coc v 2
SN74p8
QUADRUPLE 2.INPUT
otg
G c 8 (t e s ~r w T 5 s r r r r T
P OSITIVE AND GA T E S
/ ct / ,( 8
v cc d d do dr P t J v
/ odd, f, l/3 ( o
f / C
I P I
'I
d
C
Y . J 8
I O'
/ 2
d
5
I V / d l '3 r O'VD
d de 1 (
d
/3 ( .
D
/dnDE G I / . '
v n u r g .
r Cod e o c
SN741p
TRIPLE 3-INPUT
DUAL J.K MASTER-SLAVE FL IP. FLOPS
POSITIVE.NAND GATES
W ITH CLEA R
P
V CC / C / Y J C J d
v r c I d r » J r D r <I- r J /
/roc(/ vo /JP,C
Cud r r p a TD 8 ' F
/I I ' P /S
It '-I
Yr d 8 C
/ .8/ u T s p ( / T ' I/ T5
CCESIR C ( u r e r J
X X X
Oo
Gc
Ir sr
o
n
L
JL C.
2 3 d g ct /
8
To GGCE
It P r J . P / r d d n
don
N742p
DUAL 4.INPUT
D UAL RE T R IG G E R A B L E M O N O S T A B L E
P OSITIVE.NAND GA T E S
M U L T IVIBRA T O R S W ITH CLEA R
/ eo ( / r
P
v ( l p r c s'c J d r d z v
roc (. vo Ccy~c
vc r o ( ct o Jd c e Pd Zd
rd
3
/ ' / 4 ' P
su.+c / P / v T /t 8L F
SI rd
3 2
'
.' d
Y d 8 CP
O( 'T/ u TS
Ccd/IE
CI
R U
2 3 d 3 d
n v
d
r
d T
P
rrr
n I
drn
c.
I
n
rl r d r O / c J J II r ( . t n
r / d
Cr
QUADRUPI E 2.INPLI'I
I IIGH VO L T A G E I N T F R F A C F
SN75491 A N O D E DRIVER (SGENIENT)
P OSITIVE.NAN D G A T E S
ir ( d d d r J I d d rr J Y
dd
Cd / d v( C3
P3
S'r( I' r d C oy,c
' ~ - 2 Hs "1 7-(
Y • n8
-J
/
/
r
I S / d
IY Pd
rd / I o dn
8/ E r C r Od p
2 Ep
QUADRUPLE 2.INPUT
POSITIVE-NAND BUFFERS
SN75492 C A T H O D E DRIVER (DIGIT)
V CC d t t d d d Y J d d
EY
r d d d vcc 8 3 Cg
rcr T vc rode
e
'2 / /T S'
Y r 8
2
2 3
I v P d J ct Z V d rrp
C r C d
dr 8 / r o SI 3 3
d
— 80-