Philips BJ2.4U Service Manual
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Contents
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Service Modes, Error Codes, and Fault FindingEN 32 BJ2.4U/BJ2.5U PA5.Figure 5-18 “POD” to “Stand-by” flowchartG_15960_136.eps100306action holder: MIPSautonomous actionaction holder: St-bytransfer Wake up reasons to theStand by μP.Images are re-transferred to DDR-RAM fromFlash RAM (verification through checksum)Stand byPODMIPS image completes the application reload,stops DDR-RAM access, puts itself in asleepmode and signals the standby μP when thestandby mode can be entered.Disable all supply related protections and switch offthe +2V5, +3V3 DC/DC converter.DDR-RAM is put in self refresh mode and the imagesare kept in the hibernating DDR-RAM.Switch OFF all supplies by switching HIGH the POD-MODE I/O line.Switch Viper in reset stateImportant remark:release reset audio and sound-enable 2 sec after enteringstandby to save powerswitch off the remaining DC/DC convertersWait 5msWait 5msWait 10msSwitch the NVM reset line HIGH. |
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