Panasonic KX-FT71LA-B Service Manual page 61

(1) (2) RESULT
CODE
59 ERROR-NOT YOUR
UNIT
64 COMMUNICATION
ERROR
68 COMMUNICATION
ERROR
70 ERROR-NOT YOUR
UNIT
72 COMMUNICATION
ERROR
FF COMMUNICATION
ERROR
SND=TRANSMISSION RCV=RECEPTION
Most fax communication problems can be resolved by the following steps.
1. Change the transmit level. (Service code: 596, refer to
FUNCTION TABLE().)
2. Change the TX speed/RX speed. (Service code: 717/718, refer to
SERVICE FUNCTION TABLE
Note*:
If the problem remains, see the following "Countermeasure" flow chart.
(3) MODE
SND DCN responds to a post message.
SND Polling is not possible.
RCV No response at the other party after MCF or CFR is
transmitted.
RCV DCN is received after CFR transmission.
RCV The carrier is cut when the image signal is
received.
SND & Modem error.
RCV
().)
61
SYMPTOM
SERVICE
Counter
measure