Service Modes, Error Codes, and Fault Finding
EN 15
L04E AB
5.
5.8
Fault Finding and Repair Tips
Notes:
•
It is assumed that the components are mounted correctly
with correct values and no bad solder joints.
•
Before any fault finding actions, check if the correct options
are set.
5.8.1
NVM Editor
In some cases, it can be handy if one directly can change the
NVM contents. This can be done with the “NVM Editor” in SAM
mode.
5.8.2
IBO Zapper
In case of performance problems with the IBO Zapper module,
always check for the availability of new software first. Updates
of the IBO Zapper software will be distributed via Symptom
Cures.
5.8.3
Power Supply
Set Not Working
Figure 5-8 Fault finding tree “Set not working”
Set Does Not Start Up
Figure 5-9 Fault finding tree “Set does not start up”
Not Ok
Check fusible
resistor 3510 &
circuit before it
Check DC
voltage at
2505/2507
Ok
Ok
Check
fusible
resistor 3532
Check
7512
Check IC7511 &
IC7531
Set able to
start-up
Check other
fusible resistor
and capacitor in
the circuit
No
End
Yes
Not Ok
Ok
Check Power
Supply Mains
Switch
Bridge Rectifier
circuit 6500
E_14480_057.eps
190204
Set Unable
to Start
Fuse Blown?
Change
Fuse
Yes
Check
voltage
across 2552
Is Vbatt
approximately
140V
Check
voltage 2562
&2563
Yes
16V
No
Check Power
Supply circuit
Check 3V
across 2535
Check 6V
across 2535
Software
loaded?
No
Yes
Load
Software
Yes
Yes
Set able to
Start
Yes
Yes
End
Check Line
Transistor 7405
No
No
E_14480_058.eps
170204