Service Manual

MM-E 2072-09333-00
3-7
Table 3-3. Troubleshooting Procedure (Cont’d)
No. Problem Symptom Suspected Module(s)
10 Distorted audio receive signal
• LORD module
• CONTROL HEAD module
• Speaker
11 Excessive current consumption in
receive, or standby mode
• LORD module
• HI POWER module
• INTERCONNECTION module (trunk version only)
12 Excessive current consumption in
transmit mode
• HI POWER module
• Transmitter calibration
13 Low audio receive signal
• LORD module
• HI POWER module
14 Low modulation of transmit signal
• Microphone problem
• LORD module
• HI POWER module
15 Excessive distortion of audio receive
signal
LORD module
16 Transceiver enters the transmit mode,
and cannot be returned to the receive
mode
• LORD module
• CONTROL HEAD module
17 NO CLOCK message appears LORD module
18 Transceiver cannot be switched to
transmit mode by the voice PTT line in
the ACCESSORY connector
LORD module
19 Transceiver cannot be switched to
transmit mode by the data PTT line in
the ACCESSORY connector
LORD module
20 Transceiver cannot be switched to
transmit mode by the CW PTT (Morse)
line in the ACCESSORY connector
LORD module
21 LORD flash memory cannot be updated LORD module
22 The icons related to the installed
options are not displayed
LORD module
23 SYNT FAIL message appears LORD module
24 Keypad does not operate normally, or
no response to key pressing
• CONTROL HEAD module
• Keypad
• INTERCONNECTION module (trunk version only)
25 GPS receiver cannot provide position fix
• LORD module
• GPS receiver
• Defective GPS antenna
• GPS antenna cable
26 No fan control command (cooling tray
OK)
LORD module
27 No output supply voltage for external
devices in the ACCESSORY connector
LORD module