Sharp GX20 Service Manual - Page 48

] Troubleshooting - user manual

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GX20 [5] Troubleshooting 1. Power does not turn on. Connect a battery with voltage of more than 4.0 V. CONFIDENTIAL 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. Manual test mode gained? YES Can initialization of only user area (File System) be conducted by Flash Loader? YES Does the normal mode start? NO Is the program rewritable? YES After restart, the normal mode gained? NO 4-level stack memory (IC106), and IC104 defective. NO A (To page 2-43) NO 4-level stack memory (IC106), and IC104 defective. YES 4-level stack memory (IC106) data damaged. NO 4-level stack memory (IC106), and IC104 defective. YES Program of 4-level stack memory (IC106) transformed. 2 - 42

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GX20
2 – 42
CONFIDENTIAL
[5] Troubleshooting
1. Power does not turn on.
Connect a battery with voltage of more than 4.0 V.
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.
Manual test mode gained?
(To page 2-43)
Can initialization of only user area (File System) be conducted
by Flash Loader?
4-level stack memory (IC106), and IC104 defective.
Does the normal mode start?
4-level stack memory (IC106) data damaged.
Is the program rewritable?
4-level stack memory (IC106), and IC104 defective.
After restart, the normal mode gained?
Program of 4-level stack memory (IC106) transformed.
4-level stack memory (IC106), and IC104 defective.
NO
A
YES
NO
YES
YES
NO
NO
YES
YES
NO