IBM PS2 Model 40 SX and 40 SLC Hardware Maintenance Service
The hosted file, IBM PS2 Model 40 SX and 40 SLC HMR.pdf, is IBM's PS/2 Model 40 SX and 40 SLC Hardware Maintenance Service pamphlet, dated 17 March 1992, part number 10G6624, form number S84F-7767-01, Second Edition. It is a Hardware Maintenance Service (HMS) pamphlet, not a Hardware Maintenance Reference: its front page says it "contains a Symptom-to-FRU Index, a parts listing, and procedures for isolating problems to a FRU", and every page is headed "IBM PS/2 Model 40 SX and 40 SLC HMS". The hosted copy is a 34-page PDF made in 2009 from IBM's BookManager edition, numbered by topic.
The front page says it is to be used with the IBM Personal System/2 Hardware Maintenance Reference (part number 15F2190, form number S15F-2190-00) and Hardware Maintenance Service (part number 15F2200, form number S15F-2200-00); safety information is in the Hardware Maintenance Service General Information pamphlet. None of these is hosted here.
Contents
[edit | edit source]- 1.0 General checkout: diagnosing combined FRUs, using error messages, disabling the power-on password.
- 2.0 Undetermined problem.
- 3.0 Power supply: the supply check, with voltage limits for system board connectors P1 and P2 and drive connectors 1-4.
- 4.0 Display, 5.0 Installed devices list, 6.0 Keyboard, 7.0 Printer, 8.0 Memory.
- 9.0 Fixed disk drive switch and jumper settings: jumper-type drives, 40 MB and 80 MB switch-type drives.
- 10.0 Symptom-to-FRU index.
- 11.0 How to use the parts catalog; 12.0 System overview; 13.0 Parts, with FRU numbers such as power supply 64F1073, system board 92F0140 (40 SX) and 96F7506 (40 SLC), control panel assembly 92F0002, and 40 MB and 80 MB fixed disk drives 64F4132 and 64F4133.
What this manual does not contain
[edit | edit source]There are no removal procedures, schematics or component values; the supply and the system board are single FRUs.
What it settles
[edit | edit source]IBM's supply check (3.0): power off and unplug, disconnect every supply connector from the system board and drives, and check the power switch with a meter across P2 pins 4 and 6 (continuity with the switch on, none with it off; otherwise replace the control panel assembly, which includes the switch). Pin 4 of P2 is the on/off signal, so for the voltage check short P2 pin 4 to pin 6, reconnect the power cord and measure:
| Connector and pins | Output | Minimum | Maximum |
|---|---|---|---|
| P1 pins 1, 2 | +5 V | +4.8 V | +5.25 V |
| P2 pins 1, 2 | +12 V | +9 V | +15 V |
| P2 pin 5 | −12 V | −9 V | −15 V |
| P2 pin 7 | −5 V | −4.8 V | −5.25 V |
| Drive connector pin 1 | +12 V | +9 V | +15 V |
| Drive connector pin 4 | +5 V | +4.8 V | +5.25 V |
P2 pin 3 is Power Good and pin 6 ground; P1 pins 3 and 4 are ground. If any voltage is wrong IBM replaces the supply; if all are right, another component may be shutting the supply off.
Pages that cite this document
[edit | edit source]- IBM PS2 Models 35SX and 35LS Hardware Maintenance Reference and IBM PS2 Model 56 SX and 56 SLC Hardware Maintenance Service list it as related.
Download: IBM PS2 Model 40 SX and 40 SLC HMR.pdf