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Macintosh Classic II  (Apple Computer, Inc.)

[Outline] [Replace leaked capacitors] [Adjust the voltage of AVR]
 [Re-soldering the fly back transformer]



Fig.1 The potentiometer (PP1) to adjust AVR voltage is mounted on the above position. Fig.2 The potentiometer (PP1).



Fig.3 Adjust the +5V Vdd voltage by PP1. Fig.4 The +12V line voltage after adjust the +5V voltage.

Table 1 The voltage of the Vdd line before / after adjustment.
+5V line
 +12V line
Before adjustment 4.87V 11.85V
After adjustment 5.00V 12.10V