Motorola ASTRO MT 1500, Руководство по обслуживанию, Страница: 381 / 817

6816985H01-B August 16, 2007
UHF2 Troubleshooting Waveforms: RF Test Points 7.3-3
Table 7.3-2. RF Block Diagram Probe/Test Points
PP/TP Name Location
Under RF
Shield?
Page
1 Antenna Input J101, pin 5 No. 7.3-6
2 TX Signal at Harmonic Filter Input C192 Yes. 7.3-7
3 Coupler RF Out U103, pin 1 No. 7.3-8
4 TX Signal at PA Q101, pin 3 No. 7.3-9
5 Coupler RF Feedback to PCIC TP160 No. 7.3-10
6 PCIC Control Voltage TP_146 No. 7.3-11
7 TX LO R289 No. 7.3-12
8 Higher Level Voltage Multiplier C210 Yes. 7.3-13
9 Superfilter Output SF_TP Yes. 7.3-14
11 Prescalar Input to FracN Synthesizer TP23 Yes. 7.3-15
12 Reference Crystal Output R729 and C726 No. 7.3-16
13 Mod In TP36 No. 7.3-17
14 1st LO Control Voltage VC_TP No. 7.3-18
15 VCO Output R266(Rx), R289(Tx) and
TP23(prescaler)
Yes. 7.3-19
17 Frequency Out (16.8 MHz) 16out No. 7.3-20
18 RX RF Input at Antenna Switch D20, Pin 1 No. 7.3-21
20 Preselector Tuning Voltage R1 and R2 No. 7.3-23
22 Analog 5V U500, pin 5 No. 7.3-24
23 Preselector 1 Output C5 Yes. 7.3-25
24 Low-Noise Amplifier Output C12 Yes 7.3-26
25 Preselector 2 Output C18 Yes 7.3-27
26 Mixer Out (IF) L72 Yes. 7.3-28
27 Crystal Filter Out L55 Yes 7.3-29
28 Abacus Analog 3V U501, pin 5 No. 7.3-30
29 2nd LO Control Voltage U401, pin 38 Yes. 7.3-31
30 2nd LO VCO Buffer Output C433 Yes. 7.3-32
31 Analog 5V U500, pin 5 No. 7.3-33
32 Abacus Digital 3V U502, pin 5 No. 7.3-34
33 SPI Data R802 No. 7.3-40
34 SPI CLK R803 No. 7.3-41
35 Universal Chip Select U102, pin 29 No 7.3-42
36 Abacus Chip Select U401, pin 25 Yes. 7.3-43
37 RX SSI Data SSI_D No. 7.3-44