KX-TG6711RUB, KX-TG6711RUM, KX-TG6712RUM, KX-TG6721RUB, KX-TG6721RUS, KX-TG6722RUB, KX-TG6711CAB, KX-TG6711CAM, KX-TG6721CAB, KX-TG6721CAM, KX-TG6722CAB, KX-TG6711UAB, KX-TG6711UAM, KX-TG6712UAB, KX-TG6721UAB, KX-TGA671RUB, KX-TGA671RUS - Panasonic Telephone Service Manual (repair manual). Page 38

Read Panasonic KX-TG6711RUB / KX-TG6711RUM / KX-TG6712RUM / KX-TG6721RUB / KX-TG6721RUS / KX-TG6722RUB / KX-TG6711CAB / KX-TG6711CAM / KX-TG6721CAB / KX-TG6721CAM / KX-TG6722CAB / KX-TG6711UAB / KX-TG6711UAM / KX-TG6712UAB / KX-TG6721UAB / KX-TGA671RUB / KX-TGA671RUS Service Manual online

38
KX-TG6711RU/KX-TG6712RU/KX-TG6721RU/KX-TG6722RU/KX-TG6711CA/KX-TG6712CA/KX-TG6721CA/KX-TG6722CA/KX-TG6711UA/KX-TG6712UA/KX-TG672IUA//KX-TGA671EX
9.1.5.
Check Handset Transmission
Cross Reference:
Signal Route (P.18)
9.1.6.
Check Handset Reception
Cross Reference:
How to Check the Handset Speaker or Receiver (P.66).
Signal Route (P.18)
9.1.7.
Check Caller ID
Cross Reference:
Signal Route (P.18)
OK
Check MIC of Handset.
Check CDL TX (HANDSET) in Signal Route.
Check Handset Speaker in How to check the Handset 
Speaker or Receiver
.
OK
Check CDL RX (HANDSET) in Signal Route.
Check Caller ID in Signal Route.
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