Motorola Commercial Series Service Information - Page 18
Browse online or download pdf Service Information for Radio Motorola Commercial Series. Motorola Commercial Series 30 pages. Uhf2 (438-470mhz)
Also for Motorola Commercial Series: Basic User's Manual (16 pages), Service Information (48 pages), Service Information (46 pages), User Manual (18 pages), Basic User's Manual (12 pages)
Print Page
2-4
IC Designator
U401
Microprocessor
U402
EEPROM
Pin
Pin Function
75
PJ4
76
PJ5
77
PJ6
78
PJ7
79
PA0_IC3
80
PA1_IC2
81
PA2_IC1
82
PA3_IC4_OC5_OC1
83
PA4_OC4_OC1
84
PA5_OC3_OC1
85
PA6_OC2_OC1
86
PA7_PA1_OC1
87
VSSR
88
VDDR
89
ECLK (NU)
90
EXTAL
91
XTAL
92
VDDSYN
93
XFC (NU)
94
RESET
95
LVOUT
96
IRQ
97
PD0_RXD
98
PD1_TXD
99
PD2_MISO
100
PD3_MOSI
1
Chip select
2
Serial data out
3
Write protect
4
Vss
5
Serial data in
6
Serial clock
7
Hold
8
Vcc
TROUBLESHOOTING TABLES
DC Voltage
Comments (Condition)
3.23
0
3.23
Bottom option button
3.23
Top option button
0
1.57
3.00
3.00
0
Squelch detect input
0
Channel activity input
0
0
GND
3.23
1.60
1.70
Clock from U451-28
1.40
Not used
0
0
3.20
From U320
0
3.20
3.23
1.9
0
3.23
3.23
From U401-3
0
3.23
GND
3.23
0
3.23
3.23