Troubleshooting Table For Board And Ic Signals (Uhf2); Table 6-4. Troubleshooting Table For Board And Ic Signals (Uhf2) - Motorola P100 Series Detailed Service Manual

6-4
6.4

Troubleshooting Table for Board and IC Signals (UHF2)

Table 6-4. Troubleshooting Table for Board and IC Signals (UHF2)

IC Designator Pin
U201(IF IC) 1
2
4
9
12
13
15
16
U701(PLL IC) 1
4
6
7
8
12
13
14
15
16
U601 1
(Audio Amp.) 2
3
4
5
6
7
8
U103 1
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UHF2 Troubleshooting Tables: Troubleshooting Table for Board and IC Signals (UHF2)
Pin Function
Osc1
Osc2
VCC
Audio frequency
RSSI out
N-DET(BUSY)
GND
RF input
Reference OSC input
VCC
GND
XF IN
F IN
Power save
GND
LD_out
@P
@R
Mode (Mute con)
SVR
IN+
IN-
OUT-
VCC
GND
OUT+
IN+
DC Voltage (V) Comments (Condition)
3.9 44.645 MHz input
3.3
4.7
1.2
Approximately 1 At -47 dBm (with conducted)
Low At busy
0
1 45.1 MHz input
1.4 12.8 MHz input
3.3
0
2.2
2.2
High
0
High If pll unlock is low
2.4
Low
0
3.8
3.8
3.8
3.8
7.5 This voltage depends on Battery
0
3.8
1.6