Chapter 8.5 900MHz Troubleshooting Tables
8.5.1 Introduction
This chapter contains troubleshooting tables necessary to isolate a problem to the component level.
Use these tables in conjunction with Chapter 4.5, 900 MHz Detailed Theories of Operation
(page 4.5-1), Chapter 5, Troubleshooting Procedures (page 5-1), Chapter 6.5, 900 MHz
Troubleshooting Charts (page 6.5-1), and Chapter 7.5, Troubleshooting Waveforms (page 7.5-1).
This manual is to be used in conjunction with the ASTRO XTS 2500/XTS 2500
I Digital Portable
Radios Basic Service Manual (Motorola part number 6816984H01), which uses the pass/fail service
approach to radio problems.
A blank entry in the “To/From” column of J601 indicates the signal is accessible only at J601.
8.5.2 Tables
Table 8.5-1. Main Board to Keypad Board Flex Assembly (J601)
J601
Pin Number
Description To/From
1 V1.875 L703
2 V2.9 L704
3 UNSW_B+ R701
4SW_B+R708
5HOST_WAKE
6 WAKEUP
7 REGISTER_SEL
8 DISPLAY_SEL
9SCKBR620
10 SPI_MOSI_B R621
11 SPI_MISO_B R622
12 SSI_CLK R616
13 SSI_FSYNC R617
14 CODEC_TX R625
15 CODEC_RX R626
16 KEYPAD_ROW0
17 KEYPAD_ROW1
18 KEYPAD_ROW2
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