GBC FusionPunch II, Service Manual

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RAP 2.1 Control Panel
GBC FusionPunch II Service Manual
12/2003
2-17
RAP 2.1 Control Panel
Description
This RAP will isolate a Control Panel problem to
the failed component.
Initial Actions
Ensure that the Punch Main Power Switch/
Circuit Breaker is switched on. Remove the
Punch Rear Covers.
Procedure
1. Observe the condition of the LCD Panel.
The LCD Panel is blank (no messages are
displayed).
Y N
Go to Step 2.
Open the Control Panel Assembly. Check
continuity on the ribbon cable between
P/J 3 on the Punch Daughter PWB, and
the connector to the LCD Panel Assembly.
The continuity on the ribbon cable is OK.
Y N
Replace the ribbon cable (PL 6.1D).
Replace the LCD Panel (PL 2.1A).
The problem is still present.
Y N
The LCD Panel is working correctly.
Replace the Daughter PWB (PL 3.1).
The problem is still present.
Y N
The LCD Panel is working correctly.
Go to Step 1A.
1A. Check continuity in the ribbon cable
between J2 on the Daughter PWB and
connector H1 on the Little Star Controller
PWB.
The continuity is OK.
Y N
Replace the ribbon cable (PL 6.1D).
Replace the Little Star Controller PWB (PL
3.1).
2. The LCD Panel Backlight is lit and
messages are displayed.
Y N
The backlight is not lit. On the
Daughter PWB, check for +5 VDC
across J1-red wire and J1-black wire.
There is +5 VDC at this point.
Y N
Go to RAP 1.3 +5 VDC Power.
Go to Step 3.
Go to Step 4.
3. Open the Control Panel Assembly. Check
continuity on the ribbon cable between
P/J 3 on the Punch Daughter PWB and the
connector to the LCD Panel Assembly.
The continuity on the ribbon cable is OK.
Y N
Replace the ribbon cable (PL 6.1D).
Replace the LCD Panel (PL 2.1A).
The problem is still present.
Y N
The LCD Panel is working correctly.
Replace the Daughter PWB (PL 3.1).
The problem is still present.
Y N
The LCD Panel is working correctly.
Check continuity in the ribbon cable
between J2 on the Daughter PWB and
connector H1 on the Little Star Controller
PWB.
The continuity is OK.
Y N
Replace the ribbon cable (PL 6.1D).
Replace the Little Star Controller PWB (PL
3.1).
4. Perform the Diagnostics Keypad Test
(GP3).
The Keypad Test is OK.
Y N
Go to Step 5.
The LCD Panel, Keypad and Backlight are
working normally.
5. Check continuity on the harness between
the Keypad and P/J 5 on the Daughter
PWB.
The continuity on the harness is OK.
Y N
Replace the harness (PL 6.1D).
Replace the Keypad (PL 2.1A) if the
problem is still present, replace the
Daughter PWB (PL 3.1).