Service Aids
RECOMMENDATIONS ON FAILURE INFORMATION The following recommendations are given to assist you in
obtaining failure information. Their order of presentation has no significance.
• Determine the customer error code if possible. An error code is normally more factual than the operator's failure description. The descriptions of the customer error codes are found in the BASIC Reference Manual, SA21-930B, Appendix D, and in the APL Reference Manual, SA21-9303,Appendix F. See Error Codes in this section for the hardware error codes descriptions.
Use these error code descriptions to aid you in deciding which diagnostics or MDls to run.
• If the failure appears to be a printer or a tape problem, record the status byte information. This information will help you to isolate the failure and to determine which MOl to run. See Status Bytes in this section.
• Have the customer record as much information as possible when the failure occurs.
How often does the machine fail?
Does the failure occur during one job or during many jobs or programs?
Does the failure occur in BASIC, APL, or both?
Does the failure occur at a particular time, such as when the machine is first powered up or after it is warmed up?
- Is the system configuration always the same; are other devices attached when the failure occurs?
• Record any information on the previous items and any information on fixes in the space provided.
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Failure Isolation Chart
See Print Plot Error Chan in this section.
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See 320, 336, and 377 in the 5103 MIM for forms jams and ribbon problems
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For intermittent process checks, see the Freelance Troubleshooting Guide.
Review the Customer Error Code Descriptions in BASIC reference manual. Asynchronous
No Communications User's
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"1 Manual, and APLrefer-Review the Customer Error Code Descriptions in this section to help you determine which I/O device to test. If in doubt, test all devices.
ence manual, to help you determine the possibility of an operator
Review problem with the operator
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Use the Bring Up Diagnostic chart in this section to aid you in card swapping
Note: MAP organization always starts with MAP 200.
210 - Cable checkout 300 - Tape fead 310 - Diskette read 400 - Bring up 420 - Process check 500 - Display 510 - TV monitor 600 - Keyboard 700 - PatNer 810 - Printer
830 - Communication. SIO. PIO 850 - Auxiliary tape 880
Free Lance Troubleshooting Guide 4-75
Intermittent Process Check 3. Reseat all cards and cables.
Use the following procedure to help you find the cause of 4. Check voltages.
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intermittent process checks:
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... -" /5. Check the customers AC ground.
1. Do not disconnect the cable from the 5110 I/O
inter-face port and do not press the RESTART switch. 6. Check the fan(s).
2. With the PROCESS CHECK light on, probe the
following pins to determine the cause of the process Tape check:
Use the following procedure to help you find the cause of Error (active level) Pin FRU intermittent tape errors:
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-RDR J2S08 G2, J2, L2, 1. Any cartridges that were written before a problem
M2, M4, N2, was resolved on the tape drive, can still cause prob- .'-'-'- ~
N4,A2 lems.
-Bus in J2U09 A2, B2, D2,
F2, H2, J2 2. Check the cartridge stops (see 223).
+DA error base I/O H2M02 H2, J2 /
+DA error common 3. Perform the Tape Select Magnet Service Check
and language ROS F2U13 F2 (see 221).
+DA error display G2M09 G2
+DA error 5106 Al-C1P05 5106 Al-Cl 4. Clean the tape head with isopropyl alcohol and a +DA error 5114 Al-C1Dll 5114Al-Cl lint free tissue. Check the head adjustment (see +DA error 5103 Bl-A2P12 5103 Bl-A2 225). Replace the head if it is worn.
+DA error
asyn-chronous com- 5. Clean the spindle assembly and the drive rolls /
munications - with isopropyl alcohol and a lint free tissue.
serial I/O D2J13 D2
+DA error BSCA B2J04 B2 6. Check the cartridge-in-place and file protect +DA error parallel ItO K2J06 K2 switches for proper adjustment (see 224).
+DA error executable
ROS L2P06 L2 7. Reset all the cables and the cards in the tape
+Bus out error base I/O H2P07 H2, J2, L2, unit.
A2, M2, M4,
N2,N4
8.
Check to be sure the tape unit does not face into+Bus out error BSCA B2J05 B2 a strong light or the sun. ( '
+Bus out error asyn- I
chronous communica- 9. Make sure the brake arms are the white brake
',,-tions - serial I/O D2M02 D2, A2, M2, arms and not the black brake arms.
M4, N2, N4
+Bus out error parallel
'"-,-I/O K2G05 K2 AC Power Grounding Checks
+Bus out error
com-mon and language To check for proper AC power receptacle grounding,
ROS F2Ull F2, A2, M2, measure the AC voltages at the location shown in the M4,N2,N4 following figure. This check does not detect a poor quality +Bus out error display G2M05 / G2, A2, M2, ground (high resistance to earth).
M4,N2,N4 +Bus out error executable
Gm:ff~
ROS L2P05 L2
+Bus out error 5103 Bl-A2Pll 5103 Bl-A2 Neutral
+Bus out error 5106 Al-C1Pll 5106 Al-Cl Hot
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+Bus out error 5114 Al-C1Dl0 5114 Al-Cl
+Keyboard parity error H2U13 H2 Front View
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If you suspect a line problem you can:
1.
2.
3.
4.
Place an isolation transformer between the line and the 5110 computer.
I nspect the AC box to be sure the wires do not cross. The line side and load side wires should not cross as this can induce line spikes in the load side wires.
Check the AC box capacitors to ensure they are not twisted and their wires crossed.
Check for a machine or a device in the same room, on the same line, or near by that can induce con-ductive or incon-ductive noise.
The voltage between neutral and ground should be less than 2 volts AC.
The voltage between neutral and hot should be approxi-mately 110 Vac to 120 Vac. Also, the voltage between ground and hot should be approximately 110 Vac to 120 Vac.
Check that all frame ground connections are clean and tight in all devices on the system. Frame grounding is indicated be either a braided cable or a green and yellow wire.
5110 ground locations:
Bottom cover, center right side CRT mounting screen and frame Power supply fan motor Raceway
Power switch AC power box Tape unit motor
AC capacitor in tape unit TV monitor plug
5103 ground locations:
Left front corner Right front corner AC line cord
Flat cable shield clamp Left rear of forms tractor 5106 ground locations:
Tape unit motor
Flat cable shield clamp
5114 ground locations:
Back panel (yellow/green wire) Hinges (2)
Power supply chassis AC capacitor Line filter Relay chassis
AC motor, AC connector to ground DC power supply AC ground Line cord
Diskette drive motor cable Frame to frame ground AC switch box, through cable Fan bracket (thread forming screw) Fan frame through star washer
AC Power Considerations
Checking for proper AC line voltage is a task that you are familiar with. However, other aspects of the AC power source are also very important. The AC line voltage should not vary by more than ± 10% except for 500 ms transients of +15% to -18%.
A type of AC power disturbance becoming more frequent is fractional phase loss. This is a result of phase controlled triacs or SCRs controlling motors, ovens, or other loads.
These devices turn on their loads during each phase and deplete the sine wave of energy.
AC Power Terms
Current Carrying Ground: This is the neutral line that is connected to the neutral bus.
Neutral Bus: This bus bar is inside the power panel. The neutral bus should be tied to this bus. The neutral bus should be tied to the ground bus only at the main distribu-tion panel.
Main Distribution Panel: This is the first power panel inside of the customer's bui Iding. This panel is fed directly from the power company lines. The ground bus in this panel is serviced by the service entrance ground.
Ground Bus: This bus bar is in the power panel. The ground wire for the power source of the 5110 should connect to this bar, along with a wire into the panel from an approved earth ground source.
Free Lance Troubleshooting Guide 4-77
Earth Ground: The definition depends upon local electrical building codes. Usually, an earth ground is supplied in two forms:
1.
2.
A metal pipe running into the earth and containing running water. Stagnant water or sump lines are not good earth ground sources. Lines broken by nonmetal connections do not supply a good earth ground.
A metal stake driven into the ground. The length of the stake and the depth to which it must be driven into the ground depends on local codes.
Noncurrent Carrying Ground: This is the line from the ground in the receptacle to the ground bus.
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