boardrepair.me · Schematic reference
MacBook Pro A1502
Files are provided for diagnostic and repair purposes only. Use
/schematic 820-3536 / 820-4924 in the Telegram bot to download automatically.
Download files
| File | Type | Access |
|---|---|---|
| ⊞ a1502_schematic_1.brd | BoardView (.brd) | Open in browser / download |
| 📄 a1502_schematic_2.pdf | PDF Schematic | Open in browser / download |
BoardView files (.brd) — open with OpenBoardView (free, Windows/Linux) for interactive component location. PDF schematics open in any PDF viewer.
Board overview
MacBook Pro 13" Retina (2013–2015). Schematics cover boards 820-3536 (Early 2013), 820-3462 (Late 2013) and 820-4924 (Early/Late 2015). Intel Haswell (2013) or Broadwell (2015) CPU. ISL6259A battery charger IC, LP8550 backlight boost controller. Includes both BoardView (.brd) and PDF schematic.
CPU / GPU
Intel Haswell / Broadwell
PMU / Charger
ISL6259A (charger), SMC (U16 5T591M)
Connectivity
MagSafe 2
Schematic ref.
820-3536 / 820-4924
Power rails reference
Rails listed in measurement priority order — start at the top. Each rail must be present before the next can be generated.
| Rail name | Voltage | Notes & fault hints |
|---|---|---|
PPBUS_G3H |
8.5–12.6 V | Main bus rail. From ISL6259 (adapter/battery). Measure first. Absent = ISL6259 fault or no battery/adapter. |
SMC_BC_ACOK |
3.3 V | Adapter detected signal from ISL6259 to SMC. Absent despite good adapter = ISL6259 or F7030 fuse. |
PP3V3_S5 |
3.3 V | Standby 3.3 V. SMC-generated. First soft-power rail. Short here = system won't POST. |
PP5V_S5 |
5.0 V | Standby 5 V. Generated from PPBUS via SMC enable. Check R7050 enable resistor. |
PP3V3_S0 |
3.3 V | Active 3.3 V. Requires full S0 state. Absent = CPU not booting or thermal shutdown. |
PP5V_S0 |
5.0 V | Active 5 V. Feeds USB, SD card, MagSafe LED. |
PP1V5_S0 |
1.5 V | DDR3L memory voltage. If absent: memory bus won't initialise. |
PPVCORE_S0 |
0.7–1.2 V | CPU VCore (Intel Haswell VID-programmed). Varies with CPU load state. |
Common failure zones
Most likely failures first. Each entry gives a symptom and the immediate diagnostic action.
No charging — ISL6259 fault
Measure SMC_BC_ACOK first. If absent: check F7030 fuse and ISL6259 pins 6+7 (VBAT sense). Dead ISL6259 is very common on A1502.
No backlight — screen image visible
LP8550 backlight boost IC failure. Measure PPBUS_G3H to LP8550 pin 1. Check BLEN signal from GPU. Check backlight fuse (F9700).
No power — PPBUS_G3H present
SMC not enabling PP3V3_S5. Check SMC_ADAPTER_EN signal. Measure U7000 enable pin. Common after liquid damage.
Short on PP3V3_S5
Measure resistance with board off. Remove capacitors around PP3V3_S5 bus to isolate. Liquid damage under SMC area most common.
Kernel panic — random crashes
Check PP1V5_S0 stability under load. Failing DDR3L or instability in memory voltage rail. Also check thermal paste.