Motorola ASTRO MT 1500, Руководство по обслуживанию, Страница: 287 / 817

6816985H01-B August 16, 2007
VHF Troubleshooting Waveforms: RF Test Points 7.1-3
Table 7.1-2. RF Block Diagram Probe/Test Points
PP/TP Name Location
Under RF
Shield?
Page
1 Antenna Input J101, pin 5 No. 7.1-6
2 TX Signal at Harmonic Filter Input C180 Yes. 7.1-7
3 Coupler RF Out U103, pin 1 No. 7.1-8
4 TX Signal at PA Q101, pin 2 No. 7.1-9
5 Coupler RF Feedback to PCIC TP160 No. 7.1-10
6 PCIC Control Voltage TP_146 No. 7.1-11
7 TX LO TP299 No. 7.1-12
8 Higher Level Voltage Multiplier C210 Yes. 7.1-13
9 Superfilter Output SF_TP Yes. 7.1-14
11 Prescalar Input to FracN Synthesizer TP23 Yes. 7.1-15
12 Reference Crystal Output R729 and C726 No. 7.1-16
13 Mod In TP36 No. 7.1-17
14 1st LO Control Voltage VC_TP No. 7.1-18
15 VCO Output C261, C266 and C236 Yes. 7.1-19
17 Frequency Out (16.8 MHz) 16out No. 7.1-20
18 RX RF Input at Antenna Switch C1 No. 7.1-21
20 Preselector Tuning Voltage C15 and C46 No. 7.1-23
22 Analog 5V U500, pin 5 No. 7.1-24
23 Preselector 1 Output C16 Yes. 7.1-25
24 Low-Noise Amplifier Output C35 Yes 7.1-26
25 Preselector 2 Output C47 Yes 7.1-27
26 Mixer Out (IF) C68 Yes. 7.1-28
27 Crystal Filter Out L56 Yes 7.1-29
28 Abacus Analog 3V U501, pin 5 No. 7.1-30
29 2nd LO Control Voltage U401, pin 38 Yes. 7.1-31
30 2nd LO VCO Buffer Output C433 Yes. 7.1-32
31 Analog 5V U500, pin 5 No. 7.1-33
32 Abacus Digital 3V U502, pin 5 No. 7.1-34
33 SPI Data R802 No. 7.1-40
34 SPI CLK R803 No. 7.1-41
35 Universal Chip Select U102, pin 29 No 7.1-42
36 Abacus Chip Select U401, pin 25 Yes. 7.1-43
37 RX SSI Data SSI_D No. 7.1-44