Sony PCV-R528DS - Manual (Page 75)

System Board 67
Fan Connectors
The CPU-FAN and PWR-FAN connectors are 1 x 3-pin straight header
connectors. CPU-FAN controls the cooling fan on the CPU. PWR-FAN
controls the cooling fan in the power supply.
CPU-FAN and PWR-FAN Connector
Pin Signal Name
1 Ground
2 FAN_CTRL (+12V)
3 FAN_SEN
1 2345
KY0034.VSD
CPU-FAN
3 1
PWR-FAN
3
1