Checking Handset, Phone Module (PHM)

Checking handset




In case of lost function of the handset, this may be due to problems in the cable between Phone module (PHM) and handset.
- Ignition off.
Check the cable (microphone signal) between Phone module (PHM) #C1-19(#19) and secrecy handset's connector #C5-1(#21) for open circuit according to: Checking wiring and terminals Checking Wiring and Terminals
Check the cable (loudspeaker signal) between Phone module (PHM) #C1-20(#20) and secrecy handset's connector #C5-2(#22) for open circuit according to: Checking wiring and terminals Checking Wiring and Terminals
Check the cable (voltage feed) between Phone module (PHM) #C1-7(#7) and secrecy handset's connector #C5-5(#25) for open circuit according to: Checking wiring and terminals Checking Wiring and Terminals
Check the cable (cradle signal) between Phone module (PHM) #C1-8(#8) and secrecy handset's connector #C5-4(#24) for open circuit according to: Checking wiring and terminals Checking Wiring and Terminals
Check the cable (ground) between Phone module (PHM) #C1-18(#18) and secrecy handset's connector #C5-3(#23)for open circuit according to: Checking wiring and terminals Checking Wiring and Terminals
Try replacing the handset.
Remedy as necessary.

Other information
- Telephone handset Telephone Handset
- Phone Module (PHM) Phone Module (PHM) Phone Module (PHM) Phone Module (PHM)
- Signal specification Signal Description, Phone Module (PHM)
- Connecting the breakout box Connecting the Breakout Box, Phone Module (PHM)









Was a fault detected?

Yes - Remedy as necessary

No - Troubleshooting procedure complete

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