KX-NS0106X - Panasonic PBX Service Manual (repair manual). Page 12

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12
KX-NS0106X
7.2.
Running FAX card
At WebMC(Command-UM Command),input "FMER 200000,16", then "RUN".
Display "OK"?
Go "FAX Send/Recieve"
+1.2VD voldate is 1.2V?
Yes
No
Repaire or replace CN301
NRST become "H" level with +3.3VD.
No
Yes
Signal"0" D+ < 0.3V and D- < 0.3V
Check RSTn "H" level
Check "SDCLK" 24MHz.
No
Yes
Repaire or replace X201, C210, 
C211, R269
Check USB Interface. Signal "1" D+ > 
0.8V and D- > 0.8V(D+:between R335 
and GND, D-:between R336 and GND)
No
Yes
Go "Memory test"
No
Repaire or replace CN301, R335, R336
No
Yes
83ns D+ > 3.0V. 83ns D- > 
3.0V(12Mbps)
Go "Memory test"
No
Yes
83ns D+ < 0.3V. 83ns D- < 
0.3V(12Mbps)
Go "Memory test"
No
Yes
Other cause.go "Memory test"
Yes
Check and repaire R325, CN301, 
R214 (NC), C202 (NC), R408( NC)
Check IC303 2pin "H" level
No
Yes
Check and repaire R410, R409, 
R238, R414 (NC)
repaire or replace IC303
No
Yes
Repaire or replace IC303
+3.3VD become "H" level, then NRST 
become "H" level.
Yes
No
Repaire or replace parts (C301, R302, 
R303, Q301, D301, L301, C339, 
C354, DL301, DL302, C303, IC301, 
R306, R307, C341, C342).
Check CN301
No
Yes
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