(No.RA020)1-95The LCD displays controlThe LCD displays controlWhen an error display appears on the LCD.If the /FRST is always 0V, the MPU/DSPis broken.Remove D701 to check the voltage ofFlash memory side R732.If the voltage becomes abnormal, Flashmemory is broken.Points to be checked Normal voltage/CS_FIC704(4 pin) After power-on,andIf the IC704 (1 pin) is 0V or 1.8V,the MPU/DSP may be broken.If the IC704 (2 pin) is 0V or 1.8V,the MPU/DSP or Flash memory may bebroken.Points to be checked Normal voltageSBC MPU/DSP side R51 3.3V1.8VPoints to be checked Normal voltage54M C841 5.36V18M C839 1.8V33M C820 3.3VThe BGA parts are not broken.Remove the FFC of Main unit betweenSub (Display) unit.If the voltage becomes normal, the FFC orSub (Display) unit is broken.The LCD displays “INIT ERROR 1”.An error occurs when the mobile DDRinternal RAM reads or writes.The mobile DDR may be broken.Check the flowchart from beginning.Points to be checked Normal voltagePRST 3.3VRemove Q703.If the MPU/DSP side is 3.3V, the MPU/DSPor Flash memory or mobile DDR may bebroken.Points to be checked Normal voltage/CS_LCD CP717 (8 pin) After power-onand/CS_LCD has an abnormal voltage.Check each of the following items.Check to see the terminal of L731 andCP717.Remove the FFC of Main unit betweenSub (Display) unit.As a result, if the abnormality yet, theMPU/DSP or Flash memory or mobile DDRmay be broken.It is unlikely that the BGA parts are broken.Checking the control signal output fromthe MPU/DSPPoints to be checked Normal voltage/FRSTD701(Anode side)1.8V fixed laterD801(Cathode side)1.8V fixed laterRemove R51 to check the voltage of the SBC.if the MPU/DSP side is 0V,the MPU/DSP or Flash Memory or mobile DDRmay be broken.Checking the output signalfrom the MPU/DSP.When a normalvalue is confirmed.When a normalvalue is confirmed.When a normalvalue is confirmed.When a normalvalue is confirmed.When a normalvalue is confirmed.When a normalvalue is confirmed.When an abnormalvalue is confirmed.When an abnormalvalue is confirmed.When an abnormalvalue is confirmed.When an abnormalvalue is confirmed.When an abnormalvalue is confirmed.When an abnormalvalue is confirmed.Descriptions of signal names(1) /RST :MPU/DSP reset signal LOW Reset(2) /BINT :Battery final voltage monitoring LOW Final voltage(3) /OVRB_OUT :Battery overvoltage monitoring LOW Overvoltage(4) /PSW_OUT :Power switch signal LOW ON(5) /IGN_OUT :Ignition switch signal LOW ON(6) /FRST :Flash Memory reset signal LOW Reset(7) /CS_F :Flash Memory chip select signal LOW Active(8) SBC :Switch +B control HIGH ON(9) 30LCD :LCD module control 3.0V power supply(10) PRST :LCD reset signal LOW Reset(11) /CS_LCD :LCD controller chip select signal LOW Active
