GX15
2 – 57
CONFIDENTIAL
14. IrDA (Infrared) communication is impossible.
Set the distance and angle within the specification for the IrDA
communication.
Check in IrDA inspection mode.
Is 2.8 V supplied from Q104 pin 2?
IC106 is defective.
Is 2.8 V applied to UN101 pin 6?
Q104 is defective or UN101 pin 6 is soldered improperly.
R183 is defective.
Does the send signal (UN101 pin 5) send pulse waves period-
ically?
Is R183 good in appearance and mounted properly?
IC101 or IC106 is defective.
Short terminal (CN101 pin 2 to VEXT) and C197 are defective.
Is 3.0 V supplied from VCC (UN101 pin 1)?
Are short terminal (CN101 pin 2 to VEXT) and C197 good in
appearance and mounted properly?
IC106 is defective.
Is SD signal (UN101 pin 3) 0.2 V or lower?
Q104 and IC106 are defective.
Does the RxD signal (UN101 pin 4) send pulse waves periodi-
cally?
IrDA port (UN101) is defective.
Is UN101 good in appearance and mounted properly?
IrDA port (UN101) is defective or mounted improperly.
Is communication possible after replacing IrDA port (UN101)?
IC106 is defective.
IrDA port (UN101) is defective.
NO
YES
NO
YES
NO
NO
YES
YES
NO
NO
YES
YES
NO
YES
NO
YES
NO
YES
NO
YES
Summary of Contents for GX15
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