15
3. The base and handset cannot be connected.
Check whether the base
is able to set in the test
mode 1.
OK
NG
A
Check IC5 and its
peripheral circuit.
Check base RF unit.
NG
Check the TX POWER
and the TX FREQUENCY
on the base unit.
OK
NG
Check base RF unit.
Set the base in the test
mode 3, check whether
deviation of the TX data
is app. 8 kHz Dev.
OK
NG
Check whether there is a
250 Hz data waveform at
“MOD” of RF unit.
Check RT3, R40, R68,
R69, R53, R70 and C79.
NG
OK
Check base RF unit.
Set the base in the test
mode 8, 902.952467
MHz (250 Hz ±8 kHz
Dev.) 1mV output signal
from RF jack is applied.
Can the status LED be
lighted?
OK
NG
Check whether there is a
250 Hz data waveform at
pin 9 of IC3.
Check IC3, Q1 and their
peripheral circuit.
NG
OK
Check whether there is a
250 Hz data waveform at
the Q2 collector.
Check RT2, Q2 and their
peripheral circuit.
NG
OK
Check whether there is a
250 Hz data waveform at
pin 38 of IC5.
Check R42, R46, IC1 and
their peripheral circuit.
NG
OK
Check IC5 and its
peripheral circuit.
Check whether the
handset is able to set in
the test mode 1.
OK
NG
Check IC604 and its
peripheral circuit.
Check the TX POWER
and the TX FREQUENCY
on the handset unit.
OK
NG
Check handset RF unit.
OK
Summary of Contents for FT 8000
Page 1: ...CORDLESS TELEPHONE PUBLISHED IN JAPAN Aug 2000 SERVICE MANUAL FILE NO 2B0 200006 FT 8000 ...
Page 10: ...9 10 SCHEMATIC DIAGRAMS Base Unit ...
Page 11: ...11 12 Handset ...
Page 25: ...26 ELECTRICAL PARTS LOCATION Base Unit Main PCB ...
Page 26: ...27 Handset Main PCB ...
Page 27: ...28 WIRING DIAGRAMS Base Unit ...
Page 28: ...29 Handset ...
Page 47: ......
