ThinkPad Expansion Unit

Introduction: The ThinkPad Expansion Unit acts as a versatile base station for increasing the connectivity of vintage ThinkPads.

Diagnostic Error Codes

If an error is detected, the following appears:

• Large X on the left side of the device icon.
• Device ID (three digit)
• Error code (two digit)
• FRU code (four digit)

 

The device ID and error code are used to indicate the detail portion of the FRU which caused the error. If replacing a FRU does not correct the problem, see the device ID or error code from the previous failure. If they have changed, the cause might be because the new FRU is defective or that the FRU was incorrectly installed.

FRU Codes

If an error is detected by the diagnostic tests, a four-digit FRU code is displayed. The FRU code indicates two suspected FRUs. Replace the FRU that is indicated by the two leftmost digits first, then replace the FRU indicated by the two rightmost digits. No FRU is assigned to code 00. If only one FRU is suspected, the other FRU code is filled with zeros. See the referenced page before replacing the FRU.

FRU Code	FRU/Action
10	System Board
11	CPU Card
20	Memory (See 'Memory Checkout'.)
30	Reserved
32	External Keyboard
33	External Mouse
40	LCD Assembly
45	External CRT
50	Reseat the Diskette Drive (FDD-1) Diskette Drive (FDD-1)
51	Reseat the Diskette Drive (FDD-2) Diskette Drive (FDD-2)
60	Reseat the Hard Disk Drive (HDD) Hard Disk Drive (HDD)
72	PCMCIA Slot Assembly
90	CD-ROM Drive

If the problem remains after replacement of the FRUs, go to 'Undetermined Problems'.

 Safety Notice 4

The lithium battery can cause a fire, explosion, or severe burn. Do not recharge it, remove its polarized connector, disassemble it, heat it above 100°C (212°F), incinerate it, or expose its cell contents to water. Dispose of the battery as required by local ordinances or regulations. Use only the battery in the appropriate parts listing. Use of an incorrect battery can result in ignition or explosion of the battery.

La pile de sauvegarde contient du lithium. Elle présente des risques d'incendie, d'explosion ou de brûlures graves. Ne la rechargez pas, ne retirez pas son connecteur polarisé et ne la démontez pas. Ne l'exposez pas à une temperature supérieure à 100°C, ne la faites pas brûler et n'en exposez pas le contenu à l'eau. Mettez la pile au rebut conformément à la réglementation en vigueur. Une pile inappropriée risque de prendre feu ou d'exploser.

Die Systembatterie ist eine Lithiumbatterie. Sie kann sich entzünden, explodieren oder schwere Verbrennungen hervorrufen. Batterien dieses Typs dürfen nicht aufgeladen, zerlegt, über 100 C erhitzt oder verbrannt werden. Auch darf ihr Inhalt nicht mit Wasser in Verbindung gebracht oder der zur richtigen Polung angebrachte Verbindungsstecker entfernt werden. Bei der Entsorgung die örtlichen Bestimmungen für Sondermüll beachten. Beim Ersetzen der Batterie nur Batterien des Typs verwenden, der in der Ersatzteilliste aufgeführt ist. Der Einsatz falscher Batterien kann zu Entzündung oder Explosion führen.

La batteria di supporto e una batteria al litio e puo incendiarsi, esplodere o procurare gravi ustioni. Evitare di ricaricarla, smontarne il connettore polarizzato, smontarla, riscaldarla ad una temperatura superiore ai 100 gradi centigradi, incendiarla o gettarla in acqua. Smaltirla secondo la normativa in vigore (DPR 915/82, successive disposizioni e disposizioni locali). L'impiego di una batteria non adatta potrebbe determinare l'incendio o l'esplosione della batteria stessa.

La bateria de repuesto es una bateria de litio y puede provocar incendios, explosiones o quemaduras graves. No la recargue, ni quite el conector polarizado, ni la desmonte, ni caliente por encima de los 100°C (212°F), ni la incinere ni exponga el contenido de sus celdas al agua. Deséchela tal como dispone la normativa local.

Power Systems Checkout

To verify the symptom of the problem, power on the computer using each of the power sources as follows:

1. Remove the battery pack, diskette drive, and hard disk drive.
2. Connect the AC Adapter and check that power is supplied.
3. Install the diskette drive or hard disk drive  one at a time, and check that power is supplied from  each power source.
4. Disconnect the AC Adapter, remove the hard disk and  diskette drive, and install the charged battery pack,  then check that power is supplied by the battery pack.

If you suspect a power problem, see the appropriate power supply check listed below.

• Checking the AC Adapter .
• Checking Operational Charging .
• Checking the Battery Pack .
• Checking the Backup Battery .

To verify the symptom of the problem, power on the computer using each of the power sources as follows.

1. Remove the battery pack and diskette drive.
2. Connect the AC Adapter and check that power is supplied.
3. Disconnect the AC Adapter and install the charged battery pack, then  check that power is supplied by the battery pack.

If you suspect a power problem, see the appropriate power supply check listed below.

Checking the AC Adapter

You are here because the computer fails only when the AC Adapter is used.

• If the power problem occurs only when a Port Replicator is used,  replace the replicator.
• If the power-on indicator does not turn on, check the power  cord of the AC Adapter for correct continuity and installation.
• If the operational charge does not work, go to 'Checking Operational Charging' .

NOTE: For Model 365XD, there are two types of adapters. The procedure for checking both types is the same.

1. Unplug the AC Adapter cable from the computer and  measure the output voltage at the plug of the AC Adapter cable.

   

Pin	Voltage (Vdc)
1	+14.5 to +17.0
2	Ground

• If the voltage is correct,  replace the system board.
• If the problem is not corrected, go to 'Undetermined Problems' .
• If the voltage is not correct, go to the next step.
• Unplug the AC Adapter cable from the ac power outlet and wait  five minutes or longer to allow the over-voltage protection circuit  to be fully discharged and initialized.
• Plug the AC Adapter cable into the ac power outlet.
• Measure the output voltage of the AC Adapter.
• If the voltage is still not correct, replace the AC Adapter.

NOTE: An audible noise from the AC Adapter does not always indicate a defective adapter.

Checking Operational Charging

To check operational charging, use a discharged battery pack or a battery pack that has less than 50% of the total power remaining when installed in the computer.

Perform operational charging. If the battery status indicator does not turn on, remove the battery pack and leave it to return to room temperature. Reinstall the battery pack. If the charge indicator still does not turn on, replace the battery pack.

Checking the Battery Pack

Battery charging will not start until the Fuel-Gauge shows that less than 95% of the total power remains, with this condition the battery pack will charge to 100% of its capacity. This protects the battery pack from being overcharged or having a shortened life.

Do the following:

1. Power off the computer.- Remove the battery pack and measure the voltage between battery  terminals 2 (+) and 6 (-).

    

   Terminal	Voltage (Vdc) / Signal
   1	-
   2	+8 to +13.5
   3	-
   4	-
   5	Thermal
   6	Ground (-)

   NOTE: Signal lines, not used in these steps,  are used for communication between the system and the battery.

   • If the voltage is less than  +9.6 V dc, the battery pack has  been discharged. Recharge the battery pack.

   If the voltage is still less than +9.6 V dc after recharging,  replace the battery.

   NOTE:  If the voltage of the battery pack is 0 V, it is not defective.

   • If the voltage is more than +9.6 V dc,  measure the resistance between  battery terminals 5 and 6.  The resistance must be 4 K to 30 K ohm.

     If the resistance is not correct, replace the battery pack.

     If the resistance is correct, replace the system board.

Checking the Backup Battery

1. Power off the computer and unplug the AC Adapter from the computer.- Open the keyboard and remove the battery pack.- Lift the right-hand section of the black insulator sheet.- Locate the backup battery on the system board, shown at 1.

   

   Do not use a metal tool when removing the backup battery. Use only a plastic tool.

   • Using a plastic tool, remove the backup battery from the system board.
   • Measure the voltage of the backup battery. Refer to the following table for voltages:

   Wire	Voltage (Vdc)
   +	+2.5 to +3.7
   -	Ground

• If the voltage is correct, replace the system board.
• If the voltage is not correct, the backup battery has been  discharged. Replace the backup battery.
• If the backup battery discharges quickly after replacement,  replace the system board.

You are here because the computer fails only when the AC Adapter is used.

• If the power problem occurs only when the Port Replicator is used,  replace the replicator.
• If the power-on indicator does not turn on, check the power  cord of the AC Adapter for correct continuity and installation.
• If the operational charge does not work, go to 'Checking Operational Charging' .

1. Unplug the AC Adapter cable from the computer and  measure the output voltage at the plug of the AC Adapter cable.

 

Pin	Voltage (Vdc)
1	+14.5 to +17.0
2	Ground

• If the voltage is correct, replace the subcard.
• If the problem is not corrected, replace the system board.
• If the problem is not corrected, go to 'Undetermined Problems' .
• If the voltage is not correct, go to the next step.
• Unplug the AC Adapter cable from the ac power outlet and wait  five minutes or longer to allow the over-voltage protection circuit  to be fully discharged and initialized.
• Plug the AC Adapter cable into the ac power outlet.
• Measure the output voltage of the AC Adapter.
• If the voltage is still not correct, replace the AC Adapter.

NOTE: An audible noise from the AC Adapter does not always indicate a defective adapter.

Checking the AC Adapter (2635-380/385)

1. Power off the computer- Remove the battery pack and measure the voltage between  battery terminals 1 (+) and 4 (-).

    

   Terminal	Voltage (Vdc) / Signal
   1	+0 to +13.5
   2	N/C
   3	Thermal
   4	Ground (-)
   5	Select
   6	A-Ground

   NOTE: Signal lines not used in these steps are used for  communication between the system and the battery.

   • If the voltage is less than +11.0 Vdc, the battery pack has been discharged.  Recharge the battery pack.

   If the voltage is still less than +11.0 Vdc after recharging, replace the battery.

   NOTE: If the voltage of the battery pack is 0 V, it is not defective.

   • If the voltage is more than +11.0 Vdc, measure the resistance between battery terminals  3 and 4. The resistance must be 4 to 30 K ohm.

     If the resistance is not correct, replace the battery pack.

     If the resistance is correct, replace the subcard.

1. Power off the computer and unplug the AC Adapter from the computer.
2. Turn the computer upside down.
3. Remove the DIMM cover and backup battery (see DIMM Card / Backup Battery)
4. Measure the voltage of the backup battery. NOTE: Be careful not to measure the wrong side of the backup battery.

 

Wire	Voltage (Vdc)
Red	+2.5 to +3.7
Black	Ground

• If the voltage is correct, replace the system board.
• If the voltage is not correct, the backup battery has been  discharged. Replace the backup battery.
• If the backup battery discharges quickly after replacement,  replace the system board.

  See Lithium Battery Safety

1. Turn the computer upside down.

2 3 4 5 6 DIMM

2 3 7 Backup battery

 

When replacing

Make sure the plus side is on top when replacing the backup battery.

Step	Location (Quantity)	Length
2	DIMM cover (1)	-

NOTE: Only loosen the screw in step 2

Memory Checkout

DIMM cards are available for increasing memory capacity.

DIMM	Displayed Value 2625 365X, XD	Displayed Value 2635 380-385
No DIMM installed	7808KB	16000KB
8MB	16000KB	24192KB
16MB	24192KB	32384KB
32MB	40576KB	48768KB

Memory errors might stop system operations, show error messages on the screen, or hang the system.

Use the following procedure to isolate memory problems.

NOTE: Make sure that the DIMM is fully installed into the connector. Both latches must be latched completely. A loose connection can cause error code 195.

1. Power off the computer and remove the DIMM from its  slot (if installed).
2. Press and hold the F1 key, then power on the computer.  Hold the F1 key down until the Easy-Setup screen appears.
3. Select Test and press Enter.
4. Select Memory and press Enter to  run the memory test on base memory. If an error appears, replace the  system board.
5. Power off the computer and reinstall the DIMM, then power on the  computer. Verify the memory size, then test the memory. If an error  appears, replace the DIMM.

If memory problems occur intermittently, make sure the DIMM socket latches are latched completely. If the DIMM latches are securely latched, use the loop option to repeat the test. When the test detects an error, an error log is printed on the printer connected to the parallel port.

• For 2625 365X, XD see 'Error Log'
• For 2635 380-385 see 'Error Log'

for more information.

Undetermined Problems

You are here because the diagnostic tests did not identify which adapter or device failed, installed devices are incorrect, a short circuit is suspected, or the system is inoperative. Follow the procedures below to isolate the failing FRU (do not isolate non-defective FRUs).

Verify that all attached devices are supported by the computer.

Verify that the power supply being used at the time of the failure is operating correctly.

• For 2625 365X, XD see 'Power Systems Checkout' .
• For 2635-380/385 see 'Power Systems Checkout' .

1. Power off the computer.- Check the cables, wires, and connectors for  short circuits and open circuits. Visually check them for damage.  If any problems are found, replace the FRU.- Remove or disconnect all of the following devices.

   1. Non-IBM devices
   2. Devices attached to the expansion bus connector
   3. Printer, mouse, and other external devices
   4. Battery pack
   5. Hard disk drive
   6. Internal diskette drive or CD-ROM drive
   7. DIMM
   8. PC Cards
   • Power on the computer.
   • Determine if the problem has changed.
   • If the problem does not occur again, reconnect the removed devices  one at a time until you find the failing FRU.
   • If the problem still remains, remove the backup battery and wait for 3 minutes, then  replace the backup battery and set current date and time.
   • Determine if the problem has changed.
   • If the problem remains, replace the following FRUs one at a time.  Do not replace a non-defective FRU.

If ThinkPad 2625 365X, XD then replace

• Keyboard card
• LCD assembly
• System board
• CPU card

If ThinkPad 2635 380/385 then replace

• Subcard
• System Board

Error Log

Diagnostic errors are printed on the printer that is attached to the parallel port when the error is detected. The error is also logged in the system memory.

Do the following to display the errors:

1. End the test, if it is running.
2. Press Ctrl+A to select the advanced diagnostic mode.
3. Press Ctrl+E .
4. The error log appears.
5. To exit the screen, select the cancel icon or press Esc.

The error log is not saved when the system is powered-off.

Diagnostic errors are printed on the printer that is attached to the parallel port when the error is detected. The error is also logged in the system memory.

Do the following to display the errors:

1. End the test, if it is running.
2. Press Ctrl+A to select the advanced diagnostic mode.
3. Press Esc to exit the ThinkPad FRU Connections screen. The keyboard test screen appears.
4. Press Ctrl+Pause to exit the keyboard test screen.
5. Press Ctrl+E .
6. The error log appears.
7. To exit the screen, select the cancel icon or press Esc.

The error log is not saved when the system is powered-off.

Device ID

If an error is detected by the diagnostic tests, a three-digit device ID is displayed. The device ID indicates the suspected device.

Icon	Device ID	Suspected Device
	001 003 007 086	System Board Keyboard Math Coprocessor Pointing Device
	002	Memory
	050	Display
	017	Hard Disk Drive
	006	Diskette Drive
	066	External Diskette Drive
	080	PCMCIA
	009	Parallel
	011	Serial
	215	CD-ROM
	103	Infrared port
	150	Audio (ESS AudioDrive Sound Chip)