— 18 —
3. The base and handset cannot be connected.
Check whether the base
is able to set in the test
mode 8.
OK
NG
A
Check IC6 and its
peripheral circuit.
Check base RF section.
NG
Check the TX POWER
and the TX FREQUENCY
on the base unit.
OK
OK
NG
Check base RF section.
NG
Check whether there is a
250 Hz data waveform at
RT2.
Check RT2, R91, R98,
R123, C92 and C147.
NG
OK
Check base RF section.
OK
NG
Check whether there is a
250 Hz data waveform at
RT4 AF test point.
Check IC4 and its
peripheral circuit.
NG
OK
Check whether there is a
250 Hz data waveform at
Pin 10 of IC2.
Check RT4, IC2 and
their peripheral circuits.
NG
OK
Check whether there is a
250 Hz data waveform at
Pin 64 of IC6.
NG
OK
Check IC6 and its
peripheral circuit.
Check whether the
handset is able to be
set in the test mode 1.
OK
NG
Check IC608 and its
peripheral circuit.
Check the TX POWER
and the TX FREQUENCY
on the handset unit.
OK
NG
Check handset RF
section.
OK
Check R79, R214, R215,
IC2 and their peripheral
circuits.
Set the base in the test
mode 10, check
whether deviation of the
TX data is app. 9.0 kHz
Dev.
Set the base in the test
mode 13,
902.952467MHz
(250 Hz
±
8 kHz Dev.)
1mV output signal from
RF test point is
a p p l i e d . D o e s t h e
CHARGE LED light?
Summary of Contents for FT-8901A
Page 1: ...SERVICE MANUAL PUBLISHED IN JAPAN Oct 2001 FILE NO 2BO 200113 FT 8901A CORDLESS TELEPHONE ...
Page 9: ...BLOCK DIAGRAMS Base Unit 8 ...
Page 10: ... 9 Handset Unit ...
Page 12: ...Base Key Unit 12 13 FT8901A Sche p65 01 10 15 10 42 Page 9 Adobe PageMaker 6 5J Win ...
Page 26: ... 28 Unit V Ref No Pin STBY TALK Note Note 61 2 9 2 9 IC608 62 2 9 2 9 63 2 9 2 9 64 2 9 2 9 ...
Page 29: ... 31 ELECTRICAL PARTS LOCATION Base Unit Main PCB ...
Page 30: ... 32 Base Unit Key PCB ...
Page 31: ... 33 Handset Unit Main PCB ...
Page 32: ... 34 WIRING DIAGRAMS Base Unit ...
Page 33: ... 35 Handset Unit ...
