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REV.-A
5.1
GENERAL
Troubleshooting is based on the idea that error symptoms vary according to the defective component.
Troubleshooting may involve either unit replacement or unit repair, each of which is treated separately
below.
First try to determine the defective unit by referring to section 5.2. The flowcharts in the section should
help you to isolate the defective unit. Then refer to section 5.3 for instructions for further checking and
for replacement of power supply board components. Section 5.3 lists, for various symptoms, the
potentially defective unit that may account for them. In addition, the section mentions the appropriate
waveforms and resistance values that should be checked for.
If trouble occurs in the printer mechanism and main board, refer to section
5.4,
which specifies
procedures for identifying defective components by using the diagnostics tool.
5.2
UNIT REPLACEMENT
This section correlates symptoms with the potentially defective units that may be causing them. The
unit numbers are listed in Table 5-1.
Table
5-1.
Unit Replacement Numbers
Name of Unit
Description
Unit No.
SEIPS Board
Power Board of 120V
Y502202000
SANPSE Board
Power Board of 2201240V
Y567204000
SAMA Board
Main Board
Y502204100
SAPNAL-W
Control Panel Board
Y502502000
Model-4460
Printer Mechanism for SO-2550
Y503590200
Model-4410
Printer Mechanism for SO-850
Y502590200
Printhead for SO-2550
Type-A
Y426110000
Printhead for SO-850
Type-B
Y426210000
Fuse (SEIPS)
ULTSC2.0 A-N 1
X502061011
Fuse (SANPSE)
BET 1.25A
X502063040
DANGER
If you need to turn the printer power on without upper case while troubleshooting, be careful to Do
not touch the live part of power line. You should be cover the live part by taping or wareing rubber
glove when you turned
ON
the power
5-1
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