Brother International HL 760 Service Manual - Page 20

Reset, Circuit, reset, PST591DMT.The, voltage, period, shows, interface, circuit.

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1.3.8 Reset Circuit The reset IC is PST591DMT.The reset voltage is 4.2V (typ.) and the LOW period of reset is 50 ms (typ). RESETN CO3-02E) 0+5V +5 #12 PST591Dr1T VCC OUT GND MR ‹, R77 > > >! P3 CENTRO 0 ACK BUSY PE SELECT FLT < INPRIM ) 36 SEL IN ) 14 ATFEED ) STB) DI 1 DI 2 DI 3 DI 4 DI5 7 DI 6 DI 7 DID 16 OV 17 OV OV OV OV OV OV 19 20 21 22 23 24 OV 25 OV 26 OV 27 OV 2B OV 29 OV OV 30 +SV < 18 2 1 432 1 R76 151 R 6 000 l i4 000 Ri3 151 ,\A", 2 151 4r'77C: 5 3211,\/\/\, 16 17 11 16 RA17 101 CDCCACKN BUSY PE SLCT FLTN INITN SELIN HBUSY +5V O STBN OV 0 T C53 0. -08E) HCMPN 151 0v0 RAID 101 0\10 0 0 a a MGM 6,5,51 151 15,5/ 1516IMIG@MM -a0 CO Nr LO In 7W mr CO lf) 7 Cl CU LO LO u> u> u> u> u> u> LO LO m m LO LO CLO)LLO) U L3 L3 L3 L3 L3 L3 L3 C3 L3 13 0 L, V o+5v R42 R, / Fig. 2.11

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1.3.8
Reset
Circuit
The
reset
IC
is
PST591DMT.The
reset
voltage
is
4.2V
(typ.)
and
the
LOW
period
of
reset
is
50
ms
(typ).
RESETN
CO3
-02E)
+5
#12
PST591Dr1T
VCC
OUT
GND
MR
0
+5V
‹,
R77
<,
B21
OV
1.3.9
CDCC
I/O
C71
101
O
OV
Fig.
2.10
Fig.
2.11
shows
the
CDCC
interface
circuit.
CU
N
CU
N
ID
0
L9
0
CO
01
0
CD CD
r
-
-
CC CC CC
CC
+6V
0
P3
CENTRO
0
ACK
BUSY
PE
SELECT
RA21
RA19
222
222
pl
i
1
2
1
3
1,
,1
3
1
2
1
3
_,
K
>
)
<
!>
> >
)I
I>
> >
>!
2
1
4
3
2
1
FLT
<
INPRIM
)
36
SEL
IN
)
14
ATFEED
)
STB)
DI
1
DI
2
DI
3
DI
4
DI
5
7
DI
6
DI
7
DID
OV
OV
OV
OV
OV
OV
OV
OV
OV
OV
OV
OV
OV
OV
R76
151
R
6
000
l
i4
000
Ri3
151
2
151
,
\A",
4r
'77C:
5
31,
\/\/\,
16
21
17
11
16
RA17
101
16
17
19
20
21
22
23
24
25
26
27
2B
29
30
+SV
<
18
V
o+
5
v
RAID
101
0\1
0
0v0
CDCCACKN
BUSY
PE
SLCT
FLTN
INITN
SELIN
HBUSY
STBN
C53
0.
-08E)
T
151
+5V
O
OV
0
HCMPN
R42
R,
/
0 0
a a
MGM
6,5,51
151
15,5/
1516IMIG@MM
-a0
CO
Nr
LO
In
7W
mr
CO
lf)
7
Cl
CU
LO
LO
u> u> u> u> u> u>
LO
LO
m
m
LO
LO LO LO
U
L3 L3 L3 L3 L3 L3 L3
C3
L3
13
0
L,
C)L)
Fig.
2.11