Replacements for High Failure Probability Parts on Mac 128K/512K/Plus Analog Board
Revised 16 Oct 2002
Based primarily on Larry Pina's parts list in the appendix of Mac Repair and Upgrade Secrets. All part numbers are DigiKey part numbers unless otherwise specified.
| Board Reference | Original Part | Replace With | Part Number | Cost Each (US$) |
|---|---|---|---|---|
| C1 | 3.9 mfd BP {HF} 25V 85°C | 3.9 mfd NP HF 100V 85°C | E1395-ND | 2.41 |
| C3 C30 | 220 mfd 10V 85°C | 220 mfd 16V HF 105°C | P1168-ND | 0.81 |
| C24 C29 | 2200 mfd 10V 85°C | 2200 mfd 16V HF 105°C | P1172-ND | 2.57 |
| C25 C26 C31 | 1000 mfd 16V 105°C | 1000 mfd 25V HF 105°C | P1184-ND | 2.50 |
| CR1 CR5 | GI854 3A | MR824 5A | FR604CT-ND | 0.76 |
| CR20 CR21 | IR31DQ 40V 5A or MBR1035 35V 10A (CR20) | MBR1045 45V 10A | MBR1045-ND | 0.94 |
| T1 | Non bleeder-type flyback | Bleeder-type flyback | 157-0042C (Main Electronics) (NEI Parts) | $15-20 |
| R9 | 1/4W 1MOhm | 1/2W 1MOhm | 271-1134 (Radio Shack) | 0.99/5-pack |
| R16 | 1/4W 100KOhm | 1/2W 100KOhm | 271-1131 (Radio Shack) | 0.99/5-pack |
| n/a | 805-0563 upper RFI shield | Desolder and remove | N/A | --- |
| n/a | 805-0577 lower RFI shield | Insulate with tape | N/A | --- |
| n/a | 20 or 22 AWG J4-J7 harness | 18 AWG J4-J7 harness | N/A | --- |
| Not specified by Pina: | ||||
| C35 C36 | 100 mfd 200V 85° | 100 mfd 250V 105°C | P5928-ND | 3.82 |
Compiled by Hardy Menagh; edited and converted to HTML by the pickle.