Preface; How To Troubleshoot; Glossary - Panasonic DP-C321 Service Handbook

3. 1 Preface

3. 1. 1 How to Troubleshoot

Troubleshooting procedures are roughly divided into two categories.
Level 1 Troubleshooting:
Level 1 Troubleshooting (Level 1 FIP) is the first step to diagnose a problem. Level 1F asks
whether any fault codes or problematic symptoms exist, guiding you to Level 2
Troubleshooting or an appropriate BSD to resolve the problem.
Level 2 Troubleshooting:
Level 2 Troubleshooting is a diagnostic procedure of isolating a problem by Fault Code,
document/paper jam and other various problematic symptoms. Performing a FIP or an
appropriate procedure in the check out list enables you to discover causes of a problem in a
short period of time.
• Fault Code When a Fault Code alerts you to a machine failure, perform the appropriate
troubleshooting items by referring to Level 2 Troubleshooting.
Other troubleshooting:
• Generic FIP This is the generic check procedure in performing troubleshooting for general
electric parts such as Motor, Relay, Solenoid, Switch and Sensor etc.
Service Mode/UI Diagnostic Mode:
This shows the purposes and usage of diagnostic program of the machine, and how to read
diag data.
How to proceed troubleshooting and Cautions:
• First, perform Level 1 FIP to categorize a problem, then proceed to an appropriate Level 2 FIP
or BSD to resolve the problem. To find causes of the problem using the FIP or check chart
etc., thoroughly read instructions and follow the procedure properly. When two or more
causes exist, they cannot be identified at once, so the same FIP should sometimes be repeated.
In this case, note that a different judgement is made in the process of the same FIP.
• The generic check procedure for the general electric parts (Motor, Relay, Solenoid, Switch
and Sensor etc.) is not shown in some troubleshooting. In such a case, only the causes of
troubles are shown using the expressions below. Therefore, if you do not know how to check,
proceed the troubleshooting by referring to "3.3.3 Generic FIP".
[Example] Enter DC330[xxx-xxx]. Insert paper from the tray side. Does the display show
"Low"?
Y N
Repair xxxxxx SENSOR using Sensor Failure FIP.
~
3-1

3. 1. 2 Glossary

The following terminology and sentences are used throughout the troubleshooting section. The
meanings of these terminology and sentences must be fully understood when performing problem
analysis.
Common terms:
• Fault Code
This code is displayed when the machine has found a problem, and it is composed of 6 digits.
The first 3 digits show the Chain No. and correspond to the Chain No. of BSD.
• Actuate (Deactuate)
To mechanically push (release) the actuator of the switch or the mechanical linkage
connecting to another part.
• Block
To place a sheet of document or paper on the photo sensor surface for detection.
• Check
To visually check the operation failure of parts such as the relay or mechanical linkage, and
failure status of parts.
• Enter the Service Mode.
To enter the Service Mode by following the procedure described in Chapter 2 How to use the
Service Mode.
• Enter the UI Diag. Mode.
To enter the UI Diag Mode by following the procedure described in Chapter 2 How to use the
UI Diag Mode (UI Diagnostics mode).
• Check the wire for a short circuit.
Turn Off the power. Measure the resistance between the Wire and the Frame using the ohm
range of a test meter.
• Check the Wire for an open circuit.
Turn Off the power. Measure the resistance for both ends of the Wire using the ohm range of
a test meter.
• Select DC330 [xxx-xxx].
Enter DC330 Component Control by following the procedure described in Chapter 3 Service
Mode. Then, either select the applicable parts from the desired module or enter Chain Link
No. [xxx-xxx] by selecting [Direct Code Input].
• Check the voltage level.
Voltage Level Range
+3.5 VDC (H) +3.33 ~ +3.68 VDC
(L) 0.0 ~ +1.0 VDC
Chapter 3 Troubleshooting