Troubleshooting and Repair 6-19
Glidepad Interface Check
CD-ROM Interface Check
8
Check Glidepad Data
Signal
Check AIO GLP connector
and GLPDATA signal
Check Glidepad
signal CLK
Check AIO GLP connector
and GLPCLK signal
Check Glidepad
Power
Check +5Vs
Check Glidepad IRQ
Check U23 (M38867)
Pin 22, IRQ 12, and AIO
to AMB connector
END
NO
YES
NO
NO
NO
YES
YES
9
Check CD-ROM
Power
Check +5Vs
Check CD-ROM Data
Bus
Check CN4
SDD (0~15)
Check CD-ROM
Address Bus
Check CN4
Pin 29, 31, 32
SDA0, SDA1, SDA2
Check IRQ Signal
Check CN4
Pin 28, DD_IRQ15
END
NO
YES
NO
NO
NO
YES
YES