Philips BJ2.4U Service Manual

Service Modes, Error Codes, and Fault FindingEN 22 BJ2.4U/BJ2.5U PA5.Figure 5-8 “Off” to “Semi Stand-by” flowchart (part 3)YesMIPS reads the wake up reasonfrom standby μP.Semi-Stand-byNoMPIFs should be initializedMPIF should deliver 4 observers:POR= 0; normal operationMSUP = 1: Main supply is presentASUP = 1; audio supply is presentROK = 1; reference frequency is present (coming from AVIP)AVIP needs to be started before the MPIF in order to have a good clock distribution.AVIP default power-up mode is Standby. The Viper instructs AVIP via I²C to enable all thePLLs and clocks and hence enter to Full Power mode.Initialize tuners and HDMIAll observers present with correct state? Log appropriateObserver errorNoYesInitialize video processing ICs- Spider (if available)Initialize source selectionInitialize ColumbusInitialize 3D CombfilterInitialize AutoTV3-th try?Log Code aserror codeSPEnable Alive check mechanismWait until Viper starts tocommunicateSwitch POD-MODE and ON-MODEI/O line “high”.YesInitialize PNX2015 HD subsystemDisable all supply related protections andswitch off the +2V5, +3V3 DC/DC converter.switch off the remaining DC/DCconvertersWait 5msFHP PDPSet? YesNoInit FHP PDPSwitch PDPGO “low”Send STBYEN = 1PFCON = 1VCCON = 1to PDP display (I²C)SDI PDPSet? YesLog displayerror and enterprotection modeSwitch “on” the LVDS output ofthe PNX2015 with a correctclock frequency within 4s afterswitching the POD and “on”mode to prevent PDP displaysupply protection.Init SDI PDPYesPWR-OK-PDPreceived within 10safter POD and “on” modetoggle ?NoSPSwitch LVDS back off ifend state is not the activestate.These LVDS items areSDI V3 display only !!Wait 10msFrom part B From part B From part BSwitch the NVM resetline HIGH.Wait for the +8V6 to be detected if not yet present. (ifit does not come, the standby μP will enter aprotection mode, this is not a dead end here)Start 4 seconds preheating timer in case ofa LPL scanning backlight LCD set.Do not enter semi-standby state in case of an LPLscanning backlight LCD set before 4 s preheating timer haselapsed.F_15400_096c.eps020206Only applicable for sets with CableCARDTM slot (POD)** * *autonomous actionaction holder: St-byaction holder: MIPS