Motorola HT750 Service Manual - Page 40

Programming/Test Cable Schematic - radio mic

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3-38 Configuring and Wiring the Programming/Test Cable P1 TO RADIO UNIVERSAL CONNECTOR EXT SPKR + 1 EXT SPKR - 2 OPTION B+ 3 EXT MIC 4 OPT SEL 2 5 OPT SEL 1 6 GND 7 RX DATA 8 TX DATA 9 RSSI 10 XMIT/RX AUDIO 11 BOOT CTRL 12 N/C 13 P2 TO RADIO TEST SET RLN4460 1 2 AUDIO 5 AUDIO + 7 8 MIC AUDIO 9 15 16 GND 18 VOL CTRL 19 DISC 20 PTT 21 OPT SEL INT/EXT 22 25 BOOT CTRL J1 TO RIB RLN4008 1 GND 10K 4 BIAS 11 BUS - 15 BUS + 25 BOOT CTRL FL0830062O Figure 3-24: Programming/Test Cable Schematic

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3-38
Configuring and Wiring the Programming/Test Cable
Figure 3-24:
Programming/Test Cable Schematic
1
2
5
7
8
9
16
18
19
20
21
22
25
15
AUDIO -
AUDIO +
MIC AUDIO
GND
VOL CTRL
DISC
PTT
OPT SEL INT/EXT
BOOT CTRL
1
4
15
25
11
GND
BIAS
BUS +
BOOT CTRL
BUS -
1
2
3
4
5
6
8
9
10
11
12
13
7
EXT SPKR +
EXT SPKR -
OPTION B+
EXT MIC
OPT SEL 2
OPT SEL 1
RX DATA
TX DATA
RSSI
XMIT/RX AUDIO
BOOT CTRL
N/C
GND
P2
TO RADIO
TEST SET
RLN4460
P1
TO RADIO
UNIVERSAL
CONNECTOR
J1
TO RIB
RLN4008
FL0830062O
10K