Panasonic KX-F910BX Service Manual page 82

KX-F910BX
(3) No voice reception
Does the modulation
factor become 2.7 kHz
deviation. when -30 dBm
is input to the base unit?
NO
Is there an output
waveform at pin 6 of
CN501?
YES
Is there an output
waveform at pin 24 of
IC502?
YES
Check RF unit
(cordless base unit).
(Refer to page 110
(4) No voice transmission
Does the microphone of the
portable handset work.
YES
Dose the modulation factor
become 5.5 kHz Devi.
when -19 dBm is input to
the portable handset
microphone terminal?
NO
Is there an output waveform on
the collector of Q19?
YES
Is there an output waveform at
pin 24 of IC1?
YES
Check RF part (portable
handset).
Check the
NO
Analog board.
(Refer to page 68)
NO
Check around
IC502.
: resolding
' 112)
NO
Check around the
microphone.
NO
Check around
Q19.
NO
Check around
IC1.
YES
Is there an output
waveform on the collector
of Q15 (Portable handset)?
YES
Is there an output
waveform at pin 28 of
IC1?
YES
Check SPEAKER.
YES
Is there an output
waveform on the
collector of Q503
base unit?
YES
Is there an output at
pin 30 of IC502?
YES
Is there an output at
pin 5 of CN501?
YES
Check the Analog
borad.
| 86 |
Check RF
NO
unit, VR202
and IC202.
NO
Check around
IC1.
NO
Check RF unit,
Q503.
NO
Check around
IC502.
NO
Check signal
line.