6-20 Troubleshooting and Repair
Charger Board Interface Check
Serial Port Interface Check
10
Plug-in AC adapter
DC_IN = 20V
Check M/B TW1, F1
Q6 = 5V
Check AIO CHG_EN
Charge Battery
Check U1, Q6, Q7,
Q8
END
NO
NO
NO
YES
YES
Check Battery Pack
Voltage & Temp
11
Check BIOS Setup
Enter correct type for
COM1
Check Transmitting
Signal
Check U24
(MAX3243) SOUT1
Check Receiving
Signal
Check U24
(MAX3243) SIN1
Check MD (0~63)
Check U27
(FDC37N769)
Pin 17, 92 (IRQ3, 4)
END
NO
YES
NO
NO
NO
YES
YES