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Flow Chart of Troubleshooting
10-
33
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C417,C431,C449,C447,C430
Check or resolder
Check soldered status of
L403,C420,C422
Check cable from antenna to ANT400
Check Antenna to cable contact
Check soldered status of L407, L401, C412, ANT400
CLP400 Resolder or Change
C414, L402, RFS400
Resolder or Change
10-2-3. PCS RX
Continuous RX ON
RF Input : 62 CH
AMP : -50dBm
NO
NORMAL CONDITION
Catch the channel ?
YES
(2)
CLP400 Check
Pin #1 (C414)
≥
-65dBm ?
NO
(2)
YES
CLP400 Check
Pin #12,#13(L404)
≥
-65dBm ?
(2)
NO
YES
(5)
(4)
NO
U402 Check
Pin#4,#5
≥
-65dBm ?
YES
(6)
(4)
U402 Check
Pin#1,#8,#16,#22,#31,#48
=Clean 2.8V?
NO
YES
(4)
NO
U402 Check
Pin#28,29,30,54=100mV?
(7)
(9)
(7)
YES
C404,R401
resolder
U402 Check Pin #34(R401) :
26MHz ? Vpp : 1.2V?
NO
NO
R401 = 26MHz ?
Vpp : 1.2V?
YES
YES
(8)
(4)
U402
Change or resolder
R400 = 2.8V ?
NO
(10)
YES
TCX401
Change or resolder
Check U402
(1)
(3)