#2229: GSM was working fine for months, suddenly will not register using any GSM
stack
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Reporter: danek2 | Owner: hardware
Type: defect | Status: new
Priority: normal | Milestone:
Component: hardware | Version: GTA02v5
Severity: normal | Keywords: calypso, gsm, registration
Haspatch: 0 | Blockedby:
Estimated: | Patchreview:
Blocking: | Reproducible: always
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Comment(by joerg):
reset on registering clearly looks like a weak worn battery (or dirty
contacts) so voltage drops below the magic 3.5V due to high source-
impedance when modem starts to draw current for TX-activity.
Please try a spare bat, or probe actual voltage of bat at connectors with
a scope (~0.5s/div) during registering.
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Ticket URL: <https://docs.openmoko.org/trac/ticket/2229#comment:3>
docs.openmoko.org <http://docs.openmoko.org/trac/>
openmoko trac
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