RTC clock
Component appearing in 1 repair guide(s).

Appears in 1 guide(s)

MacBook Pro A1502 / 820-3476 / 820-4924 — Level 3 Repair Guide 820-3476
ReferenceU1900
PartRTC clock (SOT-23/TSOP)
FunctionGenerates PPVRTC_G3H (25 MHz + 32 kHz). Without it, CPU never boots.
RailsPPVRTC_G3H
⚠ Failure
Corroded C1910 (fragile pad!) → PPVRTC absent → no boot despite PPBUS OK.