Service manual

Schematic Diagrams
B - 24 Serial & Parallel Port (71-P2970-002A)
B.Schematic Diagrams
Serial & Parallel Port
Sheet 23 of 28
Serial & Parallel Port
+5V +3V
+5V
SB3V
DTR#
SOUT
RTS#
DSR#
RING#
SIN
CTS#
DCD#
Z2302
Z2304
Z2303
Z2309
Z2307
Z2308
Z2301
RINGIN#
Z2306
LPD3
LPD2
LPINIT#
LPSLIN#
LPD6
LPD5
LPD7
LPD4
Z2315
LPD0
LPSTB#
LPPE
LPBUSY
LPSLCT
Z2305
LPAFD#
LPINIT#
LPSLCT
LPD7
LPERR#
LPBUSY
LPPE
LPSLIN#
LPD1
LPSTB#
LPD4
LPACK#
LPD0
LPD3
LPD2
LPD5
LPD6
PD7
PD3
PD5
PD4
PD6
PD2
PD[0..7]
PD1
PD0
LPACK#
RINGIN#
LPD1
LPERR#
LPAFD#
Z2310
Z2311
Z2312 Z2314
Z2313
Z2316
DTR1#
SOUT
RTS1#
TXD1
RXD1
DTR#
CTS1#
RING#
DSR1#
RTS#
CTS#
DCD1# DCD#
SIN
DSR#
RING1#
Q45
2N3904
B
E
C
CA294 0.1u
CA166
0.1u
CA165
0.1u
CA286
0.1u
CA285
0.1u
U37
MAX3243
13
12
19
14
18
17
16
15
23
22
20
21
28
27
10
4
9
11
5
6
7
8
26
1
3
242
25
TI2
TI3
RO1
TI1
RO2
RO3
RO4
RO5
FON
FOFF#
RO2B
INV#
C1+
V+
TO2
RI1
TO1
TO3
RI2
RI3
RI4
RI5
VCC
C2+
V-
C1-C2-
GND
L53 0_0805
L52
0_0805
CA287
0.1u
C298
220p
C297
220p
C296
220p
C295
220p
C178
180p
C302
220p
C301
220p
R584 BEAD BK1608HS-241
CN21
COM1
5
9
4
8
3
7
2
6
1
C300
220p
C299
220p
RN65 8P4R*2.7K1
2
3
4
7
6
5
8
R583
BEAD BK1608HS-241
RN64 8P4R*2.7K1
2
3
4
7
6
5
8
D36
1N4148
A C
RN66 8P4R*2.7K1
2
3
4
7
6
5
8
R585
BEAD BK1608HS-241
R579
BEAD BK1608HS-241
R582
BEAD BK1608HS-241
R578
BEAD BK1608HS-241
R581
BEAD BK1608HS-241
R580
BEAD BK1608HS-241
R258
BEAD BK1608HS-241
R247
BEAD BK1608HS-241
R246
BEAD BK1608HS-241
CN20
PRINT PORT
13
25
12
24
11
23
10
22
9
21
8
20
7
19
6
18
5
17
4
16
3
15
2
14
1
RN67 8P4R*2.7K1
2
3
4
7
6
5
8
R259
BEAD BK1608HS-241
R257
BEAD BK1608HS-241
R250
BEAD BK1608HS-241
R260
BEAD BK1608HS-241
CA292 0.1u
R254
BEAD BK1608HS-241
R262
BEAD BK1608HS-241
R245
BEAD BK1608HS-241
R249
BEAD BK1608HS-241
R252
BEAD BK1608HS-241
CA293 0.1u
R255
BEAD BK1608HS-241
CA291 0.1u
R248
BEAD BK1608HS-241
R251
BEAD BK1608HS-241
R256
BEAD BK1608HS-241
R253
BEAD BK1608HS-241
R568
1K
C284
1u
C179
180p
C180
180p
C181
180p
C183
180p
C182
180p
C185
180p
C184
180p
C186
180p
C189
180p
C187
180p
C188
180p
C192
180p
C191
180p
C190
180p
C193
180p
C194
180p
CA288
0.1u
D31 1N4148
CA
D33 1N4148
CA
D32 1N4148
CA
D30 1N4148
CA
R261
2.7K
T74
R567
1K
R561
4.7K
DTRA# [22]
SOUTA [22]
RTSA# [22]
DSRA# [22]
RIA# [22]
SINA [22]
CTSA# [22]
DCDA# [22]
+3V [3,4,5,6,11,12,13,14,15,16,17,19,20,21,22,24,26,27,28]
+5V [4,11,12,13,14,16,17,19,21,22,24,25,26,27,28]
LPTSLIN# [22]
LPTPE [22]
LPTACK# [22]
LPTAFD# [22]
LPTSLCT [22]
LPTINIT# [22]
LPTSTB# [22]
LPTBUSY [22]
LPTERR# [22]
PD[0..7] [22]
PCMCIA-RI#[17]
MINIPCI-RI#[19]
LAN-RI#[20]
SB3V [14,15,16,19,20,22,24,26]
+12V [12,13,16,17,22,24,25,26,27,28]
RI# [14]
GND1~2=GND
GND2=GND
GND1=GND
¨Ï¥Î K Type
¤§ºë±K¹q®e
Parts No : 08-106