Panasonic KX-F900 Service Manual page 71

I KX-F900
(2) Defective TAM interface section
(!) Not arriving in TAM, FAX turn on.
_sthe installed bell ring num-
ber of TAM less than that of
KX-F900?
I YES
Check the EXT. TAM Hook
detection circuit.
RL101, VAR1, R103, PC105
NO
-,nstal, a be;, ringnumber oi I
TAM less than that of KX-F900. I
(_ A FAX is coming but won't switch from TAM to FAX
Printing? I YES '1
l"°
Is the FAX from the other [ NO SOUND
party CNG or no-sound?
/
Check the path to the modem input and refer
to the TAM INTERFACE SECTION.
See the CHECK SHEET and SCHEMATIC.
Wait. I
Check VOX circuit and refer to the
TAM INTERFACE SECTION.
See the CHECK SHEET and SCHEMATIC.
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Ill
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(_) A voice is coming in but switches to FAX
Check the VOX circuit and refer to the
TAM INTERFACE SECTION.
See the CHECK SHEET and SCHEMATIC.
Hint: You can monitor the VOX signal on service mode 815.
When a VOX (sound) is detected, "Vx" will be shown on the LCD.
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