Intermec ColorCoder V4 – Service Manual Ed. 1
253
Chapter 6 Troubleshooting
No DC Power Output
Cause
AC power
Connectors and Wir-
ing
DC power unit
Formatter PCB
Excess current
Step
1
2
3
4
5
Check Point
When the power switch is turned on, is
AC power supplied to the DC power
unit?
Are the connections and wiring of the
following connectors in order?
• DC power unit: J001, J002
• Formatter PCB: J107. J108
• Engine 1 PCB: J306, J314
• Engine 2 PCB: J405
Disconnect the connectors (J001, J002)
of the DC power unit. Turn the power
switch on and check the voltage be-
tween the following terminals. Is the
voltage as prescribed?
When the connectors (J001, J002) are
inserted and the power switch is turned
on again, is the voltage between the
following terminals as prescribed?
When the connectors (J001, J002) are
inserted and the power switch is turned
on again, is the voltage between the
following terminals as prescribed?
Result
No
No
No
No
No
Corrective Action
Check in accordance with “17.
No AC Power”.
Reconnect and rewire the con-
nectors properly.
Replace the DC power unit.
Replace Formatter PCB. If the
problem remains unchanged,
replace the DC power unit.
Check if there is a short circuit in
either the Formatter, Engine 1,
Engine 2, Roll Holder board, or
the DC load system, and remove
the cause of the over-current.
6.8 Function Troubleshooting, cont'd
6.8:A Measures to Take Against Malfunctions, cont'd.
+ Probe
- Probe
Voltage
J002-15
J002-7
Approx. 5V
J001-7
J001-9
Approx. 12V
J001-9
J001-8
Approx. 12V
+ Probe
- Probe
Voltage
J001-2
J001-1
Approx. 5V
J001-3
J001-1
Approx. 5V
+ Probe
- Probe
Voltage
J002-12
J002-4
Approx. 24V
J002-10
J002-1
Approx. 24V