HardDriveInfo
schlae
Repair info and schematics for mostly older MFM hard drives
Components (98)
| Reference | Value | Description |
|---|---|---|
| Q1,Q3,Q5 | BD436 | |
| Q2,Q4 | 2N6039 | |
| U1 | 8051 | |
| U2,U4,U19 | 74LS373 | |
| U3 | CDM6264 | |
| U5 | AIC-010L | |
| U6 | AIC-300L | |
| U7 | SRAM_6116 | |
| U8 | AIC-250L | |
| U9 | DP8455 | |
| U10 | MC3479 | |
| U11,U12 | 74LS240 | |
| U13 | 74F08 | |
| U14 | 74LS14 | |
| U15-U18 | 74F38 | |
| U20 | 7406 | |
| U21 | 11647-501 | |
| U22 | SSI257_2 | |
| U23 | 74LS196 | |
| U24,U30 | 74F74 | |
| U25 | 74F04 | |
| U26 | 74LS00 | |
| U27 | 75448 | |
| U28 | 11695-502 | |
| U29 | 74LS123 | |
| U31 | 74F109 | |
| U32 | 11642-501 | |
| U33 | SSI280.2 | |
| C1,C4,C5,C8,C10,C13,C17,C22,C25,C27-C30,C32-C35,C37,C38,C40-C43,C47,C54,C56-C59 | 0.1uF | |
| C2 | 0.01uF | |
| C3,C36 | 100pF | |
| C6,C15,C23 | 22pF | |
| C7 | 330pF | |
| C9 | 270pF | |
| C11,C12,C39,C50 | 1uF 20V | |
| C14,C55 | 47pF | |
| C18,C26 | 10uF 35V | |
| C19,C52,C53 | 0.012uF | |
| C20 | 0.47uF | |
| C21,Q6,Q7,Q10,R14,R55,R56,R63 | DNI | |
| C24 | 100uF | |
| C44,C48,JP1-JP3,R86 | ? | |
| C51 | 0.12uF | |
| CR1-CR3 | 1N5818 | |
| D1 | RED | |
| D2 | 1N4148 | |
| J1 | HEADS | |
| J3 | POWER | |
| J4 | SPINDLE | |
| J6 | STEPPER | |
| J8 | SCSI | |
| J9 | SCSI ID | |
| L1,L2 | 2.7uH | |
| L3,L4 | 12uH | |
| L5 | 3.9uH | |
| L6 | 10uH | |
| L7,L8 | 22uH | |
| R1,R2 | 162 | |
| R3 | 357 | |
| R4 | 39 | |
| R5 | 2.4K | |
| R6,R22,R26,R29,R53,R65,R66,R72,R89 | 100 | |
| R7 | 54.9 | |
| R8 | 2.8K | |
| R9 | 698 | |
| R10,R20,R28 | 330 | |
| R11 | 1.36K | |
| R12,R21,R32,R39-R43,R45,R47,R48,R50-R52,R61,R77 | 11 | |
| R13 | 560 | |
| R15 | 10 | |
| R16,R24,R73,R78,R90 | 1K | |
| R17 | 22.1K | |
| R18 | 56 | |
| R19 | 10K | |
| R23 | 750 | |
| R25,R30,R58 | 2K | |
| R27 | 0.39 | |
| R31,R59,R74,R76 | 3.3K | |
| R33-R35,R57 | 120 | |
| R36 | 16K | |
| R37,R38,R49,R62 | 810 | |
| R44 | 5.1 | |
| R46 | 510 | |
| R54,R69-R71 | 51 | |
| R60 | 62K | |
| R64,R67,R68 | 6.2K | |
| R75 | 22 | |
| R79 | 1.8K? | |
| R80 | 47 | |
| R81 | 150 | |
| R82 | 4.75K | |
| R83,R84 | 680 | |
| R85 | 511 | |
| R87 | 4.32K | |
| R88 | 221 | |
| R91 | 470 | |
| RN1-RN3 | TERM | |
| X1 | 20MHz |