Power a iMac G5 iSight(A1145) with a ATX power supply?
Tekst:
Dear everyone, I am from China, just got a cheap iMac G5 logic board from a dead 20" model(A1145), I am trying my best to get it work again, I have modified 2 heat sinks to get them fit the original heat tube place. now the biggest problem how to power the board with a ATX PSU, I have googled for some while but with no luck, all I can find is how to power a first generation G5 with a ATX(http://jimwarholic.com/category/imac_g5), but the iSight model uses a different PSU, only 5 wires are out from the PSU, the 5 wires go into the inverter board, then 14 wires to the logic board.
The pinout of the 14-wire connector is:
Group 1:
INV_CPU_HI
SYS_POWERUP_L_BUF
PP12V_ALL
PP12V_ALL
PP5V_ALL
PS_GND
PP3V3_ALL
Group2:
LCD_PWM
POWER_GOOD
PS_GND
PP12V_RUN
PS_GND
PP5V_RUN
PP3V3_RUN
I presume the LCD_PWM is used to adjust the brightness of the LCD back light, but what are the "INV_CPU_HI" and "SYS_POWERUP_L_BUF" pins for?
any help will be greatly appreciated! :)
Power a iMac G5 iSight(A1145) with a ATX power supply?
Tekst:
Dear everyone, I am from China, just got a cheap iMac G5 logic board from a dead 20" model(A1145), I am trying my best to get it work again, I have modified 2 heat sinks to get them fit the original heat tube place. now the biggest problem how to power the board with a ATX PSU, I have googled for some while but with no luck, all I can find is how to power a first generation G5 with a ATX(http://jimwarholic.com/category/imac_g5), but the iSight model uses a different PSU, only 5 wires are out from the PSU, the 5 wires go into the inverter board, then 14 wires to the logic board.
The pinout of the 14-wire connector is:
Group 1:
INV_CPU_HI
SYS_POWERUP_L_BUF
PP12V_ALL
PP12V_ALL
PP5V_ALL
PS_GND
PP3V3_ALL
Group2:
LCD_PWM
POWER_GOOD
PS_GND
PP12V_RUN
PS_GND
PP5V_RUN
PP3V3_RUN
I presume the LCD_PWM is used to adjust the brightness of the LCD back light, but what are the "INV_CPU_HI" and "SYS_POWERUP_L_BUF" pins for?
any help will be greatly appreciated! :)