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GX10i
CONFIDENTIAL
[5] Troubleshooting
YES
NO
NO
2.9 V output at VTCXO (TP317)?
NO
Power supply IC (IC202) defective.
NO
Relay FPC_A or connector CN201 defective.
YES
NO
YES
YES
IC104 defective.
X101(32 kHz oscillator), and oscillation circuit defective.
32.768 kHz properly output at X101 2 pin?
13 MHz properly output at TP011?
YES
NO
YES
2.8 V output at VMEM (TP209), and 1.8 V output at
VCORE (TP207), respectively?
YES
NO
Defective mounting of 4-level stack memory (IC106).
Relay FPC_A or connector CN201 defective.
Voltage of below 1.6 V applied to SENSE terminal (C187
signal side)?
Is 4-level stack memory (IC106) properly mounted?
YES
NO
YES
NO
4-level stack memory (IC106), and IC104 defective.
YES
NO
YES
More than 3.6 V output at VBAT_BB terminal (TP219).
YES
NO
4-level stack memory (IC106), and IC104 defective.
YES
4-level stack memory (IC106) data damaged.
Connect a battery with voltage of more than 4.0 V.
1. Power does not turn on.
YES
NO
Manual test mode gained?
Can initialization of only user area (File System) be
conducted by Flash Loader?
NO
Does the normal mode start?
YES
Is the program rewritable?
After restart, the normal mode gained?
NO
Blowout of fuse (FS302).
Battery or battery mounting defective.
NO
More than 3.6 V output at Battery terminal (TPB333,
TPB335)?
Battery terminal defective, adhesive foreign matter at
contact battery (CN303) terminal, or bad soldering.
Voltage of below 1.6 V applied to SENSE terminal
(TPB331 or TP314)?
Is fuse (FS302) connected?
A
A
Program of 4-level stack memory (IC106) transformed.
4-level stack memory (IC106), and IC104 defective.
Regulator (IC303) defective.
TCXO (TCX951), IC901 and peripheral circuit defective.
NOTE: If the cause is damage to 4-level memory (IC106), ensure
to upload flash data before operation as initializing user
area may prevent detecting the damaged data.