4033 Testing

LED Symptom Index after POST 
Printer Ports Test 
LAN Connection Check
Power Supply Voltage Checks 
Operator Panel Testing
Software and Printer Checks 

I got this info along with a 4033 from Russ Blakeman down in Kentucky.


LED Symptom Index After Post (IBM 4033)
Power Print  Symptom
  On   On    Functioning OK. Go to Printer Ports Test
  On  Blink  Problem w/LAN or 4033. See LAN Check
  On   Off   Replace Op Panel Board. If problem reoccurs,
               replace the 4033.
 Off   On    Power LED may be burnt out. Replace Op Panel.
 Off  Blink  Replace Op Panel Board. Re-run POST.
 Off  Off    Check outlet or ac adapter.

Note: You might test the Operator Panel Board. Who has spares anyways?



Printer Ports Test
Complete the following steps for your parallel port.
1. Disconnect the adapter' s ac power cord from the electrical outlet.
2. Remove all interface cables.
3. Plug the printer wrap plug into the parallel port.
4. Plug the adapter' s ac power cord into an electrical outlet.
5. Press and release Reset button. The following sequence should occur:
  a. The Power LED turns On solid.
  b. The Print LED:
     1) Blinks several times within approximately 3 to 4 seconds
     2) Turns Off for up to 10 seconds
     3) Blinks continuously in a pattern of two blinks, a pause, then two
          blinks. Repeat Step 5 to test the serial port.

Fail
   Any other pattern of blinks indicates a failure of the test. Reinsert wrap plug and repeat the test. If it still fails, replace the adapter assembly.
Note: If the adapter is replaced, you must delete all associations after removing the adapter from the LAN. When a replacement adapter is connected to the LAN, you must perform the configuration steps and establish new associations.

Pass
   Go to "Software and Printer Checks".



LAN Connection Check
1. Disconnect the adapter' s ac power cord from the electrical outlet.
2. Remove all interface cables from 4033 except on Models -002 / -012.
3. Configure the adapter for the LAN wrap test as follows:
   4033-001 and 4033-011:
      Attach LAN cable to 4033, but do not connect it to the network. (For
      type 3 cable applications, an adapter is attached at the receptacle end.)
  4033-002 and 4033-012: There is no wrap test
  4033-003 and 4033-013:
      Place the selector switch into position 2. With the T-connector 
      removed, place a 25 ohm BNC terminator cap (P/N 71F1168) on the
      BNC connector. 
4. Plug adapter' s ac power cord into an electrical outlet. The following sequence should occur:
   a. The Power LED turns on solid.
   b. The Print LED:
      1) Blinks several times within approximately 3 to 4 seconds
      2) Turns off for up to 30 seconds
      3) Turns on solid.

Fail 
4033-001 and 4033-011: With LAN cable disconnected from the wall, check for continuity between pins 1 and 9 (RI 1 / RO 1) and between pins 5 and 6 (RI 2 / RO 2).

   If the continuity is not correct, the cable is bad.
   If the continuity is correct, replace the adapter assembly.

Note: If the 4033 is replaced, you must delete all associations after removing it from the LAN. When a replacement 4033 is connected to the LAN, you must perform the configuration steps and establish new associations.

4033-002 and 4033-012: Replace the adapter assembly.
Note: If the 4033 is replaced, you must delete all associations after removing it from the LAN. When a replacement 4033 is connected to the LAN, you must perform the configuration steps and establish new associations.

4033-003 and 4033-013: Go to "Power Supply Voltage Checks".

Pass
Check selector switch settings (SW1):
   4033-001 / -011 - LAN speed 4/16 Mb/S
   4033-002 / -012 - Either position (performs no function)
   4033-003 / -013 - LAN topology either 10BASE5 or 10BASE2.
Note: If the selector switch is moved, you must press Reset before continuing and then retry the LAN Connection Check.
   If the switch was set correctly, check the continuity of the switch. Use 
      Steps 9a and 9b but return here when finished.
   Replace the operator panel board if continuity is not correct. 
   If all is OK, continue with "Software and Printer Checks".



Operator Panel Testing 

1. Note whether the power LED is on or off.
2. Disconnect the adapter's ac power cord from the electrical outlet.
3. Disconnect the interface cable from the LAN.
4. Remove the top cover screws and tip the cover back. If the power LED 
   was On at the start of the proceedure, go to Step 7.
5. Plug the adapter's ac power cord into an electrical outlet.
6. Check the voltages on CR2:
   Connect red lead to A, black lead to C (gnd).
   Voltage should be between 1.6 and 3.0v DC.
  If voltage is correct and the power LED does not turn on, replace the operator panel board. See "Operator Panel Replacement".
If voltage is not correct, replace the 4033.
Note: If the 4033 is replaced, you must delete all associations after removing it from the LAN. When a replacement 4033 is connected to the LAN, you must perform the configuration steps and establish new associations.
7. Unplug the adapter's AC power cord from the electrical outlet.
8. Disconnect the operator panel board connector.
9. Check for continuity:
   a. With the selector switch (SW1) positioned toward the J1 connector, test 
       that points 2 and 3 show continuity, points 1 and 2 are open.
   b. With SW1 positioned away from the J1 connector, test that points 1 and 
       2 show continuity, points 2 and 3 are open.
   c. With the leads touching the two active poles of the reset button SW2) (1A
       and 1B on image), there should be continuity when the button is pushed. 
       If  the button is not pushed, 1A to 1B should be open.

FAIL If continuity is not correct in any of the above, replace the operator panel board.

PASS If all these tests are OK, replace the 4033.
Note: If the 4033 is replaced, you must delete all associations after removing it from the LAN. When a replacement 4033 is connected to the LAN, you must perform the configuration steps and establish new associations.



Power Supply Voltage Checks 
Connect ac adapter to outlet.
Check for +5V dc and +12V dc on the power supply connector.
Note: US Models -001, -002, -011 and -012 have only +5V.
FAIL Check ac input to PS. If ac input is good, replace power supply.
PASS Go to Operator Panel Testing


Operator Panel Replacement 
1. Remove the four top screws.
2. Tip top cover back and remove the two operator panel mounting screws.
3. Disconnect the operator panel cable.


Software and Printer Checks 

Printer Checks 
Run printer diagnostics and printer wrap test.
Is printer is configured to the right type of port (parallel or serial)
Are printer cables properly connected?
Is print queue and printer driver configuration correct?
Proper adapter port associated (parallel or serial)?
4033 printer port parameters match those of the printer (ex. parallel mode, serial baud rate, and serial protocol)?

LAN Checks
Incorrect installation of software utility.
Bad LAN cable or connection.
Single route broadcast not supported across network bridge.
Server problem? Review print server installation and configuration using the appropriate system guide to operations.

Content created and/or collected by:
Louis Ohland, Peter Wendt, William Walsh, David Beem, Tatsuo Sunagawa, Jim Shorney, Tim Clarke, Kevin Bowling, Tomáš Slavotínek, and many others.

Ardent Tool of Capitalism - MAD Edition! is maintained by Tomáš Slavotínek.
Last update: 19 Nov 2021 - Changes & Credits | Legal Info & Contact