E8257D/67D, E8663D PSG Signal Generators Service Guide 93
Troubleshooting
Troubleshooting Assembly–Level Problems
1600 Host <–> BBG Comm
— If the +3.4 VD, +2.6 VD, and +1.9 VD supply voltages are good on the A31
Motherboard, replace the A14 Baseband Generator.
— If the +3.4 VD or +2.6 VD supply voltages are bad on the A31 Motherboard,
check the origin of the supply.
— If the supply voltage is good at the origin, replace the A31
Motherboard.
— If the supply voltage is bad at the origin, troubleshoot the A19 Power
Supply.
— If the +1.9 VD supply voltage is bad on the A31 Motherboard, check the
+3.4 VD supply at the A19 Power Supply.
— If the +3.4 VD supply is good at the A19 Power Supply, replace the
A31 Motherboard.
— If the +3.4 VD supply is bad at the A19 Power Supply, troubleshoot
A19 Power supply.
1601 Apps 1 <–> Apps 2 Comm
— If the +1.8 VD supply voltage is good on the A31 Motherboard, replace the
A14 Baseband Generator
— If the +1.8 VD supply voltage is bad on the A31 Motherboard, check the
+2.6 VD supply at the A19 Power Supply.
— If the +2.6 VD supply is good at the A19 Power Supply, then replace
the A31 Motherboard.
— If the +2.6 VD supply is bad at the A19 Power Supply, then
troubleshoot the A19 Power supply.
1602 Apps 1 <–> SH4 Comm
— Replace the A14 Baseband Generator
1603 Apps 2 <–> SH4 Comm
— Replace the A14 Baseband Generator
1604 FLiegan <–> Apps 2 Comm
— Replace the A14 Baseband Generator
1605 SRAM Test
— Replace the A14 Baseband Generator
1606 SDRAM Test
— Replace the A14 Baseband Generator
To Next Page
Loading...
