Sb9600 Busy, Simplified Schematic For Charts 1-10 & 1-11; Sb9600, Simplified Schematic For Charts 1-10 & 1-11 - Motorola MCS 2000 Service Instructions Manual

Troubleshooting SB9600 BUSY, Simplified Schematic for Charts 1-10 & 1-11
SB9600 BUSY, Simplified Schematic for Charts 1-10 & 1-11
SLIC
BUSY_OUT
U0104-G4
(0V) BUSY
J0403-5
[4.9V]
( V ) - Voltages when radio is in STEADY STATE
[ V ] - Voltages when radio is asserting busy
in order to take control of SB9600 BUS
SB9600, Simplified Schematic for Charts 1-10 & 1-11
VDD
Q0400
BUS -
18
VR0419
10V
BUS +
6
VR0420
10V
J0403
VDD
R0449
4.7K
I/O 4
20
VR0429
14V
VDD
0V NORMALLY
R0421
4.7K
SCI_RX_DATA
19
VR0427
14V
BUSY
5
68P81083C20-D
R0424
(5V) (5V)
[0.06V] [4.25V]
4.7K
C0438
VR0421
470pf
J0405
VDD
C/H CONN
4
15
R0113
R0409
R0408
0 2.2K
10K
R0111
0
R0412
C0435
R0410
4.7K
470pf
VDD
R0411
R0407
R0414
4.7K
Q0402
C0436 Q0401
R0413
470pf
R0415
10K
VDD
2.2K
U0104
IN-4 C6
R0452
R0451
10K
4.7K
VDD
C0455
0.1µf
Q0420
R0106
10K
C0453
Z
Q0103
470pf
4.7K
VDD
47K
R0402
VR0428
10K
10V
4.7K
C0462
470pf
A
47K
R0433
47K
DATA
U0104 J0405
B2
C/H CONN
Q0426
R0127
0
+5
Q0406
(0V)
[4.9V]
R0425
4.7K
(0V)
[1.5V]
R0427 C0439
2K 470pf
R0021
10K
VDD
100
6
R0130
--
0
C0437 7
U0401-2
33pf BUS SCI
100
+
4
5
22K
SCI TX
R0126
47K
BOOT_SCI
Q0100
SCI SELECT
5V NORMALLY
C MOD B / O MOD A/B
G4 SLICIVA
BUSY_OUT
U0104
BUSY BUFFER
SEE "SCI DRIVER" SCHEMATIC
+5
R0426
4.7K
(5V)
BUSY_IN
[0V] U0103-76
Q0407
SCI_ECHO
TP0002
TP0004
CLOSED ONLY
K4
SCI RX
R0020
U0003
10K
OPEN ONLY
R0129
X1
13
0
63
14
X SCI RX
12
X0
U0105
11
TP0005
64
SCI TX
K4
SCI TX
U0003
U0103
MICRO
PROCESSOR
33
MOD A
32
MOD B
K4
MOD B
U0003
76
BUSY_ IN
= NOT PLACED
MAEPF-25964-O
December 6, 2004
9-29