Aller au contenu principal
Aide

Version actuelle par : mayer (détails du vote) ,

Titre:

Power a iMac G5 iSight(A1145) with a ATX power supply?

Texte:

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! :)

Appareil:

iMac G5 20" Model A1145

Statut:

open

Réponse acceptée:

23391

Message d'origine par : Eric ,

Titre:

Power a iMac G5 iSight(A1145) with a ATX power supply?

Texte:

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! :)

Appareil:

iMac G5 20" Model A1145

Statut:

open