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Rewrite from IBM's 7013 500 and 7043 service guides (now hosted): wrong service-guide mapping fixed (SA38-0531 is 7013 500 only); battery is a separate lithium cell (P/N 23F0168 / 15F8409), not a Dallas module; fan-sense jumper rule; IBM safety inspection. Removed uncited -48 V, Dallas part list, per-model opening steps, stiction fix, retail-listing citations and self-reference
 
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This guide documents preventive maintenance for the '''[[IBM RS/6000]]''' family — IBM's POWER / PowerPC / POWER3 / RS64 RISC UNIX workstation and server line, machine types '''7011 / 7012 / 7013 / 7015 / 7020 / 7025 / 7026 / 7043 / 7044 / 7248'''. Procedures are common to the family where possible; submodel-specific procedures are called out where they differ.
[[File:IBM RS6000 7012-320.jpg|thumb|320px|IBM RS/6000 POWERstation 320 (7012-320)]]


== Safety Warning ==
The [[IBM RS/6000]] family runs from the Micro Channel machines of 1990 (types 7011, 7012, 7013, 7015 and 7016) to the PCI machines of the late 1990s (7025, 7026, 7043, 7044 and the PReP 7248). IBM serviced all of them by FRU exchange, and its service guides are specific to a machine type, so the first job is to identify the machine and find its guide. Fault codes are covered in the [[IBM RS/6000 Troubleshooting Guide]].


All RS/6000 PSUs contain mains-rectified bulk capacitors that hold a lethal charge after power-off. Before any work inside any PSU shell:
== Safety ==


# Power off and unplug the mains lead.
Unplug the system before opening it; the supplies are mains powered and contain charged capacitors. IBM's 7043 service guide sets out a safety inspection to do before any service:<ref name="sg512">IBM, ''RS/6000 7043 43P Series Service Guide'', SA38-0512-03, October 1998, pp. 1-18 to 1-20 (safety inspection), 8-2 (static-sensitive devices), 8-36 to 8-38 (battery), chapter 4 (error codes) and chapter 9 (parts) ([[:File:IBM RS6000 7043 43P Series Service Guide SA38-0512-03.pdf]]).</ref>
# Wait at least 30 seconds.
# Discharge the bulk capacitor through a 1 kΩ / 5 W resistor.
# Verify with a multimeter.


Rack-class RS/6000s (7015, 7026 H-series) may carry dual or redundant PSUs and may also be wired to '''−48 V DC''' instead of mains (especially R24 frames in telco service).<ref>IBM, ''RS/6000 7015 R-Series Installation and Service Guide'' (manualslib summary)</ref> Confirm the input topology of the specific system in front of you before any service work.
# Check the covers for sharp edges, damage or alterations that expose internal parts, and for a proper fit.
# Rock the unit gently to check that it is steady.
# Switch off, disconnect the power cable and remove the covers.
# Check any alterations or attachments for hazards such as broken wires, sharp edges or broken insulation, check the internal cables for damage, and look for dirt, water or other contamination.
# On the Models 140 and 240, check that the voltage switch on the back matches the outlet.
# Check the external power cable for damage, and check for 0.1 ohm or less between the ground lug of its plug and the metal frame.
# Check the power cords of any devices with their own supplies.


== Identifying Your RS/6000 ==
Adapters, planars, diskette drives and disk drives are static-sensitive. IBM's precautions: use an antistatic wrist strap if one is available, touch the device in its bag to the metal frame before taking it out, and hold cards and boards by the edges and drives by the frame (p. 8-2).<ref name="sg512" />


The machine type and submodel are printed on the rear-panel label (e.g. "Type 7012-320", "Type 7043-150 — 43P-150"). The machine type maps to a service guide:
== Identifying the machine and its documentation ==


{| class="wikitable styled-table" style="width:100%; text-align:center;"
The machine type and model are on the label (for example 7012-320 or 7043-150). The documents below are hosted here or held in public archives.
|+'''RS/6000 service-guide mapping'''
 
! Machine type !! IBM service guide
{| class="wikitable styled-table" style="width:100%; text-align:left;"
|-
|+'''IBM service documents for the RS/6000'''
| 7011, 7012, 7013, 7015 || SA38-0531 series (POWER1/POWER2 era)
! Document !! Covers
|-
| 7020 / 7007-N40 || N40-specific HMR (rare)
|-
| 7025 (F30/F40/F50/F80) || SA38-0532 series + Redbook SG24-5143
|-
| 7026 (H10/H50/H70/H80) || SA38-0535 series + Redbook SG24-5143
|-
| 7043 (140 / 150 / 240 / 260) || SA38-0512 series + Redbook SG24-5144
|-
| 7044 (170 / 270) || SA38-0538 series
|-
|-
| 7248 (100 / 120 / 133) || IBM 7248 HOWTO + per-board reference
| ''POWERstation and POWERserver Diagnostic Programs: Operator Guide'', SA23-2631-06 (April 1992)<ref name="og">[[:File:IBM RS6000 Diagnostic Programs Operator Guide SA23-2631-6.pdf]]</ref> || Diagnostics, operator panel and three-digit display codes of the Micro Channel machines
|}
 
The machine-type prefix also tells you the era:
 
* '''70xx''' — Micro Channel POWER1/POWER2 (1990–1996).
* '''7248''' — PReP / Carolina board (1995–1997).
* '''7025 / 7026 / 7043 / 7044''' — CHRP / PCI / Open Firmware (1996–2000).
 
== Opening the System ==
 
=== 7011 (pizza-box desktop) ===
 
# Power off, unplug, discharge PSU.
# Loosen the two thumbscrews at the rear top.
# Slide the cover back ~10 mm and lift off.
# The planar is on the chassis floor; PSU on the left; drive cage at the front.
 
=== 7012 / 7013 (deskside) ===
 
# Power off, unplug, discharge.
# Open the rear access panel (two captive screws).
# The CPU MCM card and memory cards mount in a vertical riser at the rear.
# Drive cage runs vertically up the front.
# PSU is at the top or rear, depending on submodel.
 
The MCM module on POWER2 7012-39H / 397 is large, heavy and surrounded by heatsink mass. '''Do not''' lift the MCM out unless you have the IBM extraction tool — the module pins are fragile and the seating force is high.
 
=== 7015 (rack) ===
 
Standard 19" rack handling rules. CPU drawer typically slides out on chassis rails; ground yourself before any work; never disconnect rear power without locking the rack rails first.
 
=== 7025 / 7026 / 7043 / 7044 (PCI tower / rack) ===
 
# Power off, unplug, discharge.
# Remove side panel (single thumbscrew or latch on most submodels).
# Planar mounts horizontally; PSU at top or top-rear; drives stacked vertically.
# CPU and memory cards on '''carrier cards''' that plug vertically into the planar.
 
=== 7248 (Carolina PReP) ===
 
# Power off, unplug, discharge.
# Remove the cover (two screws at the rear).
# Carolina motherboard is in the bottom of the chassis. ISA cards on the left riser; PCI cards on the right.
 
== Inspecting the Planar ==
 
The Micro Channel era 7012 / 7013 planars carry '''surface-mount aluminium electrolytic''' capacitors of the same vintage and chemistry as the [[IBM PS/2 Model 70]] / [[IBM PS/2 Model 80|80]]. They leak. Inspect every SMD electrolytic on the planar before any other work — see [[IBM RS/6000 Capacitor Replacement Guide]] for the full procedure.
 
Later RS/6000 planars (7025 / 7026 / 7043 / 7044) carry through-hole and SMD tantalum decoupling plus through-hole aluminium electrolytics near the PSU input. These age more slowly than the PS/2-era SMD aluminium electrolytics but still warrant inspection.
 
== Regular Cleaning ==
 
* Soft brush and low-pressure compressed air for the planar, the riser, PCI cards, the drive cage and the PSU vents.
* Hold any fan blades by hand if using compressed air.
* Clean SCSI ribbon cable connectors and edge connectors. Original IBM SCSI cables age and develop intermittent contact in the IDC connectors.
* Clean MCA card edge fingers (POWER1/POWER2 era) with a soft eraser or deoxidising contact cleaner.
* Inspect the planar for any signs of leaked electrolyte around SMD or through-hole aluminium electrolytics.
 
== PSU Voltage Checks ==
 
Probe the PSU output rails with a multimeter while the system is powered on. RS/6000 PSUs supply the standard ATX-like rails plus, in many cases, a separate +3.3 V rail for the CPU MCM:
 
{| class="wikitable styled-table" style="width:100%; text-align:center;"
|+'''Typical RS/6000 PSU rail tolerances'''
! Rail !! Acceptable range !! Notes
|-
|-
| +5 V || +4.75 V to +5.25 V || I/O logic
| ''RS/6000 7013 500 Series Installation and Service Guide'', SA38-0531-00 (November 1996)<ref name="sg531">IBM, ''RS/6000 7013 500 Series Installation and Service Guide'', SA38-0531-00, November 1996 ([[:File:IBM RS6000 7013 500 Series Installation and Service Guide SA38-0531-00.pdf]]).</ref> || 7013 500 series: power MAP, removals and replacements, parts
|-
|-
| +12 V || +11.4 V to +12.6 V || Drive motors
| ''RS/6000 7043 43P Series Service Guide'', SA38-0512-03 (October 1998)<ref name="sg512" /> || 7043 Models 140, 150 and 240
|-
|-
| +3.3 V || +3.15 V to +3.45 V || POWER2 / PowerPC / POWER3 CPU rails (on PSUs that supply it)
| ''RS/6000 43P 7043 Models 150 and 260 Handbook'', SG24-5144-00<ref>IBM Redbook SG24-5144-00 ([http://ps-2.kev009.com/rs6000/redbook-cd/sg245144.pdf kev009 mirror]).</ref> || Technical description of the 7043-150 and -260
|-
|-
| &minus;12 V || &minus;11.4 V to &minus;12.6 V || RS-232 / legacy
| ''RS/6000 Models E30, F40, F50, and H50 Handbook'', SG24-5143-00<ref>IBM Redbook SG24-5143-00 ([http://ps-2.kev009.com/rs6000/redbook-cd/sg245143.pdf kev009 mirror]).</ref> || Technical description of those models
|-
|-
| &minus;5 V || &minus;4.75 V to &minus;5.25 V || Legacy (omitted on some later PSUs)
| ''RISC System/6000 Hardware Offerings Overview'', GC23-2188-00 (February 1990)<ref>[[:File:IBM RS6000 Hardware Offerings Overview GC23-2188-00.pdf]]</ref> || The 1990 launch models and their options
|}
|}


The exact per-machine PSU rating is in the corresponding IBM service guide. Documented values:
== Power checks ==
 
* '''7026-H70''' — 750 W PSU, FC 6290.<ref>https://www.amazon.com/IBM-6000-7026-H70-POWER-SUPPLY/dp/B000MRECHI</ref>
* '''7015 R10 / R20 / R21''' CPU drawer — 0.29 kVA typical, 200–240 V AC.
* '''7015 R24''' — 0.685 kVA typical, 200–240 V AC or −48 V DC.
* '''Per-machine watts for 7011, 7012, 7013, 7043''' — refer to SA38-0531 / SA38-0512.
 
== NVRAM / RTC Battery ==
 
The RS/6000 family uses '''Dallas Semiconductor TimeKeeper''' modules on the planar to hold real-time clock, system NVRAM and boot configuration. The internal lithium cell fails after 10–20 years, producing:
 
* Lost boot list (SMS boots from CD instead of disk after every power-cycle).
* Clock at epoch (1 Jan 1970 or similar).
* Lost machine serial number / model code (rare but possible if the part holds the IPL ROS / VPD).
* Solid LED panel halt at NVRAM tests (typically '''200''' / '''202''' / '''203''' on the LED panel — see [[IBM RS/6000 Troubleshooting Guide]]).
 
Common Dallas modules in the family include:
 
* '''DS1287 / DS1287A''' — 24-pin DIP, used on early MCA 7012 / 7013 planars (same family as PS/2 50/70/80).
* '''DS1385 / DS1387''' — DS1385 + integrated battery/crystal in an encapsulated module.
* '''DS1644''' — non-volatile TimeKeeping RAM.
* '''DS1742W''' — 32-pin nonvolatile timekeeping RAM, 5 V or 3 V variants.
* '''DS1746 / DS1746P''' — 128 KB × 8 NVSRAM + RTC, Y2K-compliant.
 
Replacement options:
 
# Direct replacement with a fresh-date Dallas/Maxim part (NOS or refurbished). DS12887+, DS1387 with cell replaced, DS1746P+.
# Modern drop-in board replacements such as the '''Glitch Works GW-1742-1''' (DS1742 substitute), '''GW-1387-1''' (DS1387 maintainable repair board) and '''Necroware nwX287''' (DS12887 replacement using a CR1225 + modern SRAM + RTC chip).<ref>https://www.tindie.com/products/glitchwrks/glitch-works-gw-1742-1-dallas-ds1742-replacement/</ref><ref>https://users.glitchwrks.com/~glitch/2017/07/27/ds1387-rebuild</ref>
# DIY: cut the Dallas plastic case open, find the internal cell, replace with an external CR2032 holder. Electrically valid but messy.
 
Replacement procedure:
 
# Power off; discharge PSU bulk capacitor.
# Identify the Dallas DIP on the planar — typically near the RTC crystal or near the boot ROM.
# Desolder with solder wick at no more than 350 °C. Limit each cycle to 5–7 seconds — RS/6000 planars are no more forgiving of repeated heating than PS/2 planars.
# Fit a socket (recommended) before fitting the replacement Dallas / Glitch Works / Necroware module.
# Power on; enter SMS (F1 or F4); re-enter boot list, IP / SLIP config, date/time.
 
After replacement, run '''SMS → Utilities → Update System Vital Product Data''' to write the machine serial back into NVRAM if the previous module had lost it.
 
== Capacitor Health ==
 
Through-hole tantalum capacitors and aluminium electrolytics on the planar, drive logic boards, GXT graphics cards and PSU all age. Full procedure: [[IBM RS/6000 Capacitor Replacement Guide]].
 
Specific known capacitor failure points:
 
* '''7012 / 7013 planar SMD aluminium electrolytics''' — same generation as PS/2 70/80 plague.
* '''7013 500-series PSU''' — will refuse to stay on if the cooling fan signal is lost. Aged secondaries cause fan stutter which causes PSU shutdown.<ref>https://www.ardent-tool.com/RS6000/docs/pdf/38053100.pdf</ref>
* '''POWER GXT graphics card decoupling''' — SMD tantalum on the GXT800P / GXT3000P boards can fail short and pull down the +5 V rail.
 
== Drive Maintenance ==
 
=== SCSI Spindle Stiction ===
 
Original IBM SCSI drives in long-stored RS/6000s are prone to spindle stiction. Symptoms: drive does not spin up; faint "thunk" on power-on but no rotation; SCSI BUS RESET timeouts.
 
Field fix (for one-time data recovery only):
 
* Power off.
* Pull the drive sled.
* Gently rotate the drive case 45–90° around its spindle axis to free the heads.
* Re-install. Power on.
 
Image the drive immediately to a modern SCSI-to-USB or SCSI2SD setup. The drive cannot be trusted to spin up reliably again.
 
=== SCSI Cable Replacement ===
 
The original IBM Centronics-50 / HD-50 SCSI cables in early RS/6000s develop intermittent contact in the IDC connectors. Replace with modern shielded cables (SCSI-3 cables are backward-compatible with SCSI-2 drives).
 
=== SCA-Tray Drives (7026 / 7044) ===
 
Hot-swap SCA-tray drives in the 7026 H-series and 7044-270 require the drive carrier to be fully inserted in the bay to register on the bus. Aged carrier latches can cause intermittent drive disappearance — clean the SCA connector with contact cleaner.
 
== Reference Diskette / Reference CD ==


Pre-CHRP RS/6000s (7011 / 7012 / 7013 / 7015) used per-machine '''Reference Diskettes''' for SETUP, similar in concept to the PS/2 line. CHRP RS/6000s (7025 / 7026 / 7043 / 7044) use the built-in '''SMS''' utility on Open Firmware — no Reference Diskette required.
On the Micro Channel machines the power-on light shows that all voltages in the supply are present and within limits and that the fans are running; if a fan the supply monitors stops, the supply turns the system off.<ref name="og" /> On the 7013 500 series the supply will not run with any fan connector (P46A, P46B, P49A, P49B, P49C) open: a connector without a fan must have the fan sense jumper fitted. A supply that shuts down and shows a status on the three-digit display is reporting a fan, temperature or power failure (see the [[IBM RS/6000 Troubleshooting Guide#7013 500 series: power supply failure codes|troubleshooting guide]]).<ref name="sg531" />


The 7248 (PReP) uses a per-board firmware that boots to a text setup screen at POST.
IBM's 7013 500 series and 7043 guides treat the supply as a single FRU and give no DC rail tolerance table; their power MAPs work by substitution and by the supply's own status indications.<ref name="sg531" /><ref name="sg512" />


== Cooling System ==
== Battery ==


Restoration points:
Both service guides show a separate lithium battery with a polarised connector, not a battery sealed inside a clock module. IBM's parts lists give P/N 23F0168 for the 7013 500 series and P/N 15F8409 for the 7043. IBM's caution: a lithium battery can cause fire, explosion or a severe burn; do not recharge, disassemble, heat above 100 °C, solder directly to the cell, incinerate or expose the contents to water, and replace it only with the specified part.<ref name="sg531" /><ref name="sg512" />


* All RS/6000s with the original PSU fan are 30+ years old by now; the sleeve bearings are due for replacement. Listen for fan rattle or stutter on power-on.
* 7013 500 series: remove the cover, disconnect the battery and its connector from the planar, and take the battery out of the card guide frame. Set the date and time afterwards.<ref name="sg531" />
* The 7013 500-series and 7015 rack systems require positive airflow to keep the MCM heatsink within thermal limits. A failed CPU fan on these can cause CPU overtemperature shutdown — visible in the LED panel as a thermal-class error.
* 7043: replacing the battery may erase the power-on password, the date and time, the customised boot list and other configuration, which must then be re-entered through System Management Services and the operating system. IBM suggests handling the new battery with a paper tissue, because skin oils can corrode the contacts.<ref name="sg512" />
* The 7044-270 PSU has redundant fans; one fan failure does not stop operation but is logged in the service processor diagnostic log.


== Connector Care ==
On the 7043, error code 20E00004 ("battery drained or needs replacement") and 28030005 (RTC battery error) call for a new battery; IBM notes that NVRAM and real-time clock errors can be caused by low battery voltage.<ref name="sg512" />


* '''Keyboard / mouse''' — RS/6000 desktops use either PS/2 Mini-DIN-6 ports (later submodels) or older AT-style 5-pin DIN (early submodels).
== Cleaning and inspection ==
* '''Serial''' — DB-9 male on most submodels (RS-232C).
* '''Parallel''' — DB-25 female on submodels with parallel port.
* '''SCSI''' — Centronics-50 (early), HD-50 / HD-68 (later), SCA-2 80-pin (hot-swap).
* '''Ethernet''' — AUI on early submodels; 10Base-T / 100Base-TX RJ-45 on later submodels.
* '''Graphics''' — 13W3 connector (IBM GXT family; same as Sun) on most RS/6000 GXT cards; 15-pin DSUB on 7248 integrated graphics.


The '''13W3''' connector requires a 13W3-to-15-pin VGA adapter for use with modern monitors.
With the system unplugged, remove dust from fans, vents and the card area, and inspect the planar, adapters and supply for leaked or bulging capacitors and for corrosion around the battery. See [[IBM RS/6000 Capacitor Replacement Guide]] for what IBM does and does not document at component level.


== Recommended Tools ==
== After any repair ==


* Philips #2 screwdriver and T15 Torx.
Run the diagnostics in Service mode (the key mode switch on the Micro Channel machines) and use the system verification procedure to check the machine before returning it to use.<ref name="og" />
* Anti-static strap.
* Digital multimeter.
* IPA + foam swabs.
* Soldering iron with fine tip + solder wick.
* '''Hot-air rework station''' for SMD electrolytic removal on 7012 / 7013 planars.
* USB microscope for inspecting SMD cap leakage.
* SCSI2SD or BlueSCSI for replacement of original SCSI drives.
* 13W3-to-VGA adapter for monitor work.
* Spare Dallas DS12887+ or Glitch Works / Necroware NVRAM replacement.
* Per-machine IBM Service Guide PDF (SA38-0531, SA38-0512, etc.).


== Related Pages ==
== Related pages ==


* [[IBM RS/6000]]
* [[IBM RS/6000]], [[IBM RS/6000 Troubleshooting Guide]], [[IBM RS/6000 Capacitor Replacement Guide]]
* [[IBM RS/6000 Troubleshooting Guide]]
* [[CRT Discharge Procedure]], [[Hard Drive Maintenance and Repair]]
* [[IBM RS/6000 Capacitor Replacement Guide]]
* [[IBM RS/6000 Firmware Update Guide]]
* [[Recommended Tools]]


== References ==
== References ==


* [https://www.ardent-tool.com/RS6000/docs/pdf/38053100.pdf IBM SA38-0531-00 — RS/6000 7013 500-series Installation and Service Guide]. Authoritative PSU + planar service.
<references />
* [https://sharktastica.co.uk/resources/docs/IBM_SA38-0512-03_RS6000_98_4.pdf IBM SA38-0512-03 — RS/6000 7043 / 7248 Service Guide]. 43P and Carolina service.
* [http://ps-2.kev009.com/rs6000/redbook-cd/sg245144.pdf IBM Redbook SG24-5144 — 43P Models 150 and 260 Handbook]. 7043 deep dive.
* [http://ps-2.kev009.com/rs6000/redbook-cd/sg245143.pdf IBM Redbook SG24-5143 — Models E30, F40, F50, H50 Handbook]. 7025 / 7026 deep dive.
* [http://www.ibmfiles.com/pages/rs6000type7044.htm IBM RS/6000 7044 family page, ibmfiles.com].
* [https://users.glitchwrks.com/~glitch/2017/07/27/ds1387-rebuild Glitch Works — DS1387 rebuild]. Reference for Dallas TimeKeeper failure mode and modern repair boards.
* [https://www.tindie.com/products/glitchwrks/glitch-works-gw-1742-1-dallas-ds1742-replacement/ Glitch Works GW-1742-1]. Drop-in DS1742 replacement.
* [https://www.minuszerodegrees.net/failure/failure.htm Commonly Failing Electronic Components, minuszerodegrees.net].


{{Navbox-IBMComputers|state=collapsed}}
{{Navbox-IBMComputers|state=collapsed}}

Latest revision as of 22:02, 30 September 2026

IBM RS/6000 POWERstation 320 (7012-320)

The IBM RS/6000 family runs from the Micro Channel machines of 1990 (types 7011, 7012, 7013, 7015 and 7016) to the PCI machines of the late 1990s (7025, 7026, 7043, 7044 and the PReP 7248). IBM serviced all of them by FRU exchange, and its service guides are specific to a machine type, so the first job is to identify the machine and find its guide. Fault codes are covered in the IBM RS/6000 Troubleshooting Guide.

Safety

[edit | edit source]

Unplug the system before opening it; the supplies are mains powered and contain charged capacitors. IBM's 7043 service guide sets out a safety inspection to do before any service:[1]

  1. Check the covers for sharp edges, damage or alterations that expose internal parts, and for a proper fit.
  2. Rock the unit gently to check that it is steady.
  3. Switch off, disconnect the power cable and remove the covers.
  4. Check any alterations or attachments for hazards such as broken wires, sharp edges or broken insulation, check the internal cables for damage, and look for dirt, water or other contamination.
  5. On the Models 140 and 240, check that the voltage switch on the back matches the outlet.
  6. Check the external power cable for damage, and check for 0.1 ohm or less between the ground lug of its plug and the metal frame.
  7. Check the power cords of any devices with their own supplies.

Adapters, planars, diskette drives and disk drives are static-sensitive. IBM's precautions: use an antistatic wrist strap if one is available, touch the device in its bag to the metal frame before taking it out, and hold cards and boards by the edges and drives by the frame (p. 8-2).[1]

Identifying the machine and its documentation

[edit | edit source]

The machine type and model are on the label (for example 7012-320 or 7043-150). The documents below are hosted here or held in public archives.

IBM service documents for the RS/6000
Document Covers
POWERstation and POWERserver Diagnostic Programs: Operator Guide, SA23-2631-06 (April 1992)[2] Diagnostics, operator panel and three-digit display codes of the Micro Channel machines
RS/6000 7013 500 Series Installation and Service Guide, SA38-0531-00 (November 1996)[3] 7013 500 series: power MAP, removals and replacements, parts
RS/6000 7043 43P Series Service Guide, SA38-0512-03 (October 1998)[1] 7043 Models 140, 150 and 240
RS/6000 43P 7043 Models 150 and 260 Handbook, SG24-5144-00[4] Technical description of the 7043-150 and -260
RS/6000 Models E30, F40, F50, and H50 Handbook, SG24-5143-00[5] Technical description of those models
RISC System/6000 Hardware Offerings Overview, GC23-2188-00 (February 1990)[6] The 1990 launch models and their options

Power checks

[edit | edit source]

On the Micro Channel machines the power-on light shows that all voltages in the supply are present and within limits and that the fans are running; if a fan the supply monitors stops, the supply turns the system off.[2] On the 7013 500 series the supply will not run with any fan connector (P46A, P46B, P49A, P49B, P49C) open: a connector without a fan must have the fan sense jumper fitted. A supply that shuts down and shows a status on the three-digit display is reporting a fan, temperature or power failure (see the troubleshooting guide).[3]

IBM's 7013 500 series and 7043 guides treat the supply as a single FRU and give no DC rail tolerance table; their power MAPs work by substitution and by the supply's own status indications.[3][1]

Battery

[edit | edit source]

Both service guides show a separate lithium battery with a polarised connector, not a battery sealed inside a clock module. IBM's parts lists give P/N 23F0168 for the 7013 500 series and P/N 15F8409 for the 7043. IBM's caution: a lithium battery can cause fire, explosion or a severe burn; do not recharge, disassemble, heat above 100 °C, solder directly to the cell, incinerate or expose the contents to water, and replace it only with the specified part.[3][1]

  • 7013 500 series: remove the cover, disconnect the battery and its connector from the planar, and take the battery out of the card guide frame. Set the date and time afterwards.[3]
  • 7043: replacing the battery may erase the power-on password, the date and time, the customised boot list and other configuration, which must then be re-entered through System Management Services and the operating system. IBM suggests handling the new battery with a paper tissue, because skin oils can corrode the contacts.[1]

On the 7043, error code 20E00004 ("battery drained or needs replacement") and 28030005 (RTC battery error) call for a new battery; IBM notes that NVRAM and real-time clock errors can be caused by low battery voltage.[1]

Cleaning and inspection

[edit | edit source]

With the system unplugged, remove dust from fans, vents and the card area, and inspect the planar, adapters and supply for leaked or bulging capacitors and for corrosion around the battery. See IBM RS/6000 Capacitor Replacement Guide for what IBM does and does not document at component level.

After any repair

[edit | edit source]

Run the diagnostics in Service mode (the key mode switch on the Micro Channel machines) and use the system verification procedure to check the machine before returning it to use.[2]

[edit | edit source]

References

[edit | edit source]
  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 IBM, RS/6000 7043 43P Series Service Guide, SA38-0512-03, October 1998, pp. 1-18 to 1-20 (safety inspection), 8-2 (static-sensitive devices), 8-36 to 8-38 (battery), chapter 4 (error codes) and chapter 9 (parts) (File:IBM RS6000 7043 43P Series Service Guide SA38-0512-03.pdf).
  2. ↑ 2.0 2.1 2.2 File:IBM RS6000 Diagnostic Programs Operator Guide SA23-2631-6.pdf
  3. ↑ 3.0 3.1 3.2 3.3 3.4 IBM, RS/6000 7013 500 Series Installation and Service Guide, SA38-0531-00, November 1996 (File:IBM RS6000 7013 500 Series Installation and Service Guide SA38-0531-00.pdf).
  4. ↑ IBM Redbook SG24-5144-00 (kev009 mirror).
  5. ↑ IBM Redbook SG24-5143-00 (kev009 mirror).
  6. ↑ File:IBM RS6000 Hardware Offerings Overview GC23-2188-00.pdf


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