(No.RA015)1-111Verify the reference clock for the BT/GPS.(BT_CLK) Intersection ofC850 and R861:Sine waveform, 19.2MHz, 0.2 to 1.2 Vp-p[The reference clock circuitfor the BT/GPS is faulty]Verify the BT/GPS controlsignal (RXD2).CP851 (1 pin):Square waveform UART data of3.3V logic.Baud rate:Default: 115.2kbpsAfter: 3.967Mbps.Check the PCB side B (c).Verify the BT/GPS controlsignal (TXD2).CP851 (2 pin):Square waveform UART data of3.3V logic.Verify the PCB side A partsC850, R861, R862.Replace any abnormal parts.Verify the BT/GPS controlsignal (18BT_HCI_RX).IC852 (8pin):Square waveform UART dataof 1.8V logic.Baud rate:Default: 115.2kbpsAfter: 3.967Mbps.[MPU/DSP (IC702) is faulty]Replace the PCB.[The 18BT_HCI_RX (TXD2)line circuit is faulty]Verify the CP851, IC852, R858Replace any abnormal partsVerify the BT/GPS controlsignal (18BT_HCI_TX).IC852 (8 pin):Square waveform UART dataof 1.8V logic.Check the PCB side B.Check the PCB side B.[The RXD2 (18BT_HCI_TX)line circuit is faulty]Verify the CP851, IC852, R858Replace any abnormal parts.[BT/GPS IC (IC850) is faulty]Replace the PCB.Verify the RTC for the BT/GPS.X850 (3 pin):Square waveform, 32.768kHz, 1.8Vp-pVerify the RTC line circuit for the BT/GPS.X850, L854, C875Replace any abnormal parts.[The BT/GPS IC is abnormal]Replace the PCB.When a normalcondition is confirmed.When a normalcondition is confirmed.When a normalcondition is confirmed.When a normalcondition is confirmed.When a normalcondition is confirmed.When a normalcondition is confirmed.When an abnormalcondition is confirmed.When a normalcondition is confirmed.When a normalcondition is confirmed.When an abnormalcondition is confirmed.When an abnormalcondition is confirmed.When an abnormalcondition is confirmed.When an abnormalcondition is confirmed.When an abnormalcondition is confirmed.When an abnormalcondition is confirmed.
