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Modifications apportées à l'étape #2

Modifié par Richdave

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Lignes de l'étape

[* icon_caution] Voltages'''REMEMBER - there is MAINS voltage on the PSU so use extreme caution'''
[* icon_caution] Use the chart provided as a reference and test the various voltages with your meter being sure to restrict the probes to the 10 solder joints on the PSU connector. Shorting any part of the PCB will almost certainly cause damage to the imac
[* icon_reminder] All voltage measurements
are all measuredtaken with PIN 1 as reference. Pin 1 is marked on the board by a dot and is the right hand pin when viewed as shown in photos
[* redicon_note] '''STANDBY''' means system connected to mains outlet but imac turned off
[* icon_note
] Pin 5 is the PSU enable line - Logic board pulls this line low (0V) to enable PSU (probably via a resistor)
[* blackicon_note] Pin 4 voltage varies according to the PSU temperature and is inversely proportional to PSU temperature. Higher Temp = Lower voltageVoltage. My measurement was taken at around **24 Deg Celsius.
[* icon_caution] Voltages'''REMEMBER - there is MAINS voltage on the PSU so use extreme caution'''
[* icon_caution] Use the chart provided as a reference and test the various voltages with your meter being sure to restrict the probes to the 10 solder joints on the PSU connector. Shorting any part of the PCB will almost certainly cause damage to the imac
[* icon_reminder] All voltage measurements
are all measuredtaken with PIN 1 as reference. Pin 1 is marked on the board by a dot and is the right hand pin when viewed as shown in photos
[* redicon_note] '''STANDBY''' means system connected to mains outlet but imac turned off
[* icon_note
] Pin 5 is the PSU enable line - Logic board pulls this line low (0V) to enable PSU (probably via a resistor)
[* blackicon_note] Pin 4 voltage varies according to the PSU temperature and is inversely proportional to PSU temperature. Higher Temp = Lower voltageVoltage. My measurement was taken at around **24 Deg Celsius.