Motorola CP150 Service Manual page 56

6-14
Table 6-4. Troubleshooting Table for Board and IC Signals (Continued)
IC Designator Pin
U404
Flash ROM
U451
ASFIC_CMP
June, 2005
VHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals
Pin Function
10 A16
11 A15
12 A12
13 A7
14 A6
15 A5
16 A4
17 A3
18 A2
19 A1
20 A0
21 D0
22 D1
23 D2
24 GND
25 D3
26 D4
27 D5
28 D6
29 D7
30 EN_CE
31 A10
32 EN_OE
1 VDD for analog circuits
2 DISC audio input
3 Ground for analog circuits
4 DACU output
5 DACR output
6 DACG output
7 VOX peak detector output
8 PLCAP for DC integrator
9 SQIN
10 Universal audio input/output
11 VDD for DACs
12 SQCAP
13 GCB2 general purpose output
DC Voltage Comments (Condition)
3.17
0.30
0.22
3.03
3.08
3.06
0
0.24
3.08
3.05
3.05
0.69
0.94
1.08
GND
0.78
0.59
0.66
0.67
0.75
3.01 From U401-38
0.16
0 From U401-86
3.00
1.34 From U510
GND
0
0
2.38 (typ) Power set (TX mode)
2.91
0.40
0.01
0
4.95
0
0 Audio PA_EN (unsquelched)
6880309N62-C