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10.
Troubleshooting  
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The ? i.MX53 ? Quick ? Start ? board ? does ? not ? have ? specific ? troubleshooting ? features ? designed ? into ? the ? board. ?
The ? board ? has ? proven ? robust ? during ? the ? initial ? test ? and ? development ? periods ? and ? should ? provide ? years ?
of ? good ? service ? to ? the ? developer ? if ? treated ? with ? due ? caution. ? The ? test ? pads ? that ? are ? included ? on ? the ?
schematic ? and ? on ? the ? board ? were ? not ? specifically ? designed ? for ? testing, ? but ? were ? placed ? on ? the ? board ? for ?
developers ? who ? wanted ? to ? make ? wire ? connections ? to ? specific ? pins ? that ? might ? not ? be ? available ? without ?
the ? test ? pads. ? One ? basic ? troubleshooting ? technique ? that ? is ? available ? to ? developers ? is ? to ? measure ? the ?
voltage ? rails ? outputs ? on ? all ? the ? rails ? coming ? from ? the ? PMIC. ? The ? subsection ? on ? PMIC ? voltage ? rails ?
presents ? a ? diagram ? with ? points ? the ? developer ? can ? use ? to ? make ? measurements. ? A ? second ? basic ?
troubleshooting ? technique ? would ? be ? to ? measure ? clock ? frequencies ? to ? ensure ? the ? clock ? are ? running ?
correctly. ? The ? position ? of ? the ? crystals ? and ? oscillators ? are ? in ? the ? design ? section ? under ? the ? i.MX53 ?
Applications ? Processor. ?
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Aside ? from ? actual ? hardware ? difficulties, ? the ? Table ? 29 ? presents ? some ? other ? issues ? that ? may ? help ? the ?
developer ? solve ? technical ? difficulties: ?
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Symptoms ?
No ? 5V ? power ? to ? the ? Quick ? Start ?
board, ? no ? Green ? LED ? light. ?
Intermittent ? signal ? on ? Debug ?
UART, ? or ? color ? issues ? on ? VGA ?
video ? output. ?
No ? Debug ? information ? on ? the ?
Host ? Computer ? Terminal ?
Window. ?
Lower ? USB ? Host ? Port ? is ? not ?
working ? correctly. ?
Possible ? Problem ?
Attached ? power ? supply ? is ? not ?
within ? the ? 4.5V ? – ? 5.5V ? window. ?
Fuse ? F1 ? has ? blown. ? Use ?
multimeter ? to ? check ? for ? open. ?
Cold ? solder ? connection ? on ?
connector ? pins ? have ? broken ?
loose ? after ? several ? cable ?
insertions. ?
Incorrect ? Serial ? Cable ? used ? (eg ?
Null ? modem ? cable) ?
Quick ? Start ? board ? is ? attached ? to ?
a ? Host ? device ? through ? the ? Micro ‐
B ? Connector. ?
Action ?
Use ? the ? power ? supply ? that ? came ?
with ? the ? Quick ? Start ? board ? kit. ?
Replace ? the ? fuse ? with ? a ? new ? 3A, ?
0603 ? surface ? mount ? fuse. ?
Examine ? the ? pins ? on ? the ? affected ?
connector ? (J8 ? or ? J16). ? If ? a ? pin ? can ?
wiggle ? back ? and ? forth, ? a ? solder ?
iron ? should ? be ? used ? to ? reconnect ?
the ? pin. ? Note: ? There ? is ? epoxy ?
over ? the ? pins ? to ? increase ? pin ?
strength. ? The ? epoxy ? may ? need ? to ?
be ? removed ? first. ?
Verify ? that ? serial ? cable ? is ? correct. ?
Remove ? cable ? from ? Micro ‐ B ?
connector ? if ? Lower ? USB ? Host ?
Port ? operations ? is ? desired. ?
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Table ? 29. ? Problem ? Resolution ? Table ?
? ?
Freescale Semiconductor
Hardware User Guide for i.MX53 Quick Start Board,
Preliminary Rev 0.91
92
PUBI – Public Use Business Information ?
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