Motorola C168 Manuale - Pagina 15

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Motorola C168 Manuale
1.2.5

RF signal diagram in DCS1800 RX mode

DCS1800 Rx fail
(BB Lives)
Check if C617
has input RF
No
signal
Yes
Check if L607
has input RF
signal
Yes
Check if C607,
No
C608 has input
RF signal
Yes
Check
TP605~608 if
No
RxIQ waveform
is correct
Yes
Defective U202
Defective
CON601
No
Defective U603 or
L607
Check if U604
Pin 1, Pin2 and
No
Pin3 has correct
waveform
Yes
Defective U604
Fault Finding chart of DCS1800 Rx part
Check if U607 Pin
10 = 0V& U607 Pin
2 = 0V
Yes
Defective U607
Defective
U201
Defective U608 or
No
U201
15