12-1
Troubleshooting
Diagrams 12
Introduction to
This Section
This section contains troubleshooting diagrams necessary to isolate a problem to the component level.
Use these diagrams in conjunction with the theory of operation, troubleshooting procedures, charts, and
waveforms.
J101
Controller Board to Controls Flex Assembly
J101 Pin # Description To/From Side Conn Pin #
1 CTSOUT* U702-B6 10
2 LHDATA/BOOT_DOUT/KEYFAIL U717-1 13
3 GROUND N/C 8
4 RS232IN U702-B2/G3 12
5 SPKR_COMMON U718-27 6
6 RS232_DOUT/BOOT_DIN U702-A5 11
7 OPT_SEL_2 U702-C6 5
8 SB9600_BUSY U701-74 9
9 EXT_SPEAKER U718-31 2
10 RTSIN* U702-J8 7
11 OPT_SEL_1 U702-A6 1
12 OPT_B+/BOOT_SEL/VPP VR119/D100 4
13 EXT_MIC U714-6 3
15-18 GROUND N/C
19 BL_HOME Q111-2
20 BL_FREQ Q111-1
21 RED_LED Q112-2
22 GREEN_LED Q112-1
23 TG2 U701-24
24 RTA1 U702-F4
25 RTA3 U702-H1
26 RTA2 U702-F2
27 RTA0 U702-F3
28-30 GROUND N/C
31 VOL U701-25
32 B+_SENSE VR101
33 UNSW_B+ P201-15/20
34 TG1 U701-19
35 +5V U709-9
36 INT_MIC U714-2
37 SPKR_COMMON U718-27
38 INT_PTT U702-H2
39 GROUND N/C
40 INT_SPKR U718-23
14, 41 EMERG U701-27
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