Sharp GX15 Service Manual page 64

GX15
(From page 2-55)
SO601:
Are voltages of the following pins within the range 0 to 2.8 V
(when camera is on)?
1. pins 11 - 18
2. pins 20 - 22
IC603 is defective.
13. SIM card is not recognised.
Replace the SIM card. Is it recognised?
Is 2.85 V supplied from pins 1, 2, and 6 of the SIM card?
And is periodic pulse wave (3.25 MHz) sent from pin 3 of the
SIM card?
Is 2.85 V applied to CN101 pin 1?
Is 2.85 V applied to CN101 pin 2?
Is periodic pulse wave sent from CN101 pin 3?
Is 2.85 V supplied from CN101 pin 6?
CN101 is defective.
CONFIDENTIAL
B
YES
NO
NO
YES
YES
YES
YES
R611, R612, and R613 are mounted improperly.
NO
YES
SIM card is defective or not the one specified.
Hereafter, check the signal waveform of each SIM when the power is turned on
without a SIM card inserted.
(SIM signal waveform appears for approx. 70 ms after the power is turned on.)
The contact point of the SIM card connector is deformed or
YES
dirty.
R110 or C131 is defective.
Are R110 and C131 good in appearance and mounted prop-
NO
erly?
IC103 is defective.
Short terminal (CN101 pin 1 to IC106 pin 195) is defective.
Is short terminal (CN101 pin 1 to IC106 pin 195) good in
NO
appearance and mounted properly?
IC106 is defective.
R164 is defective.
NO
Is R164 good in appearance and mounted properly?
IC106 is defective.
Replace R163, R113, or short terminal (CN101 pin 6 to R163).
Are R163, R113, and short terminal (CN101 pin 6 to R163)
NO
good in appearance and mounted properly?
IC106 is defective.
2 – 56
NO
YES
NO
YES
NO
YES
NO
YES