Head Voltage Value Adjustment - Epson Stylus Pro 5000 Service Manual

Stylus Pro5000

5.1.1.3 Head Voltage Value Adjustment

Head voltage value adjustment function is to write Head ID, which becomes
most important for discharging ink. If this ID is not written correctly, it results
in white or color lines and also bad influence to the Dot weight. This
adjustment is required at the following cases.
Table 5-5. Head Voltage Value Adjustment
No. Conditions
1 Head Exchange
2 C228 DRV Board Exchange
Rev. A
Reason
On the production process of heads,
dispersion of electrical characteristic
for PZT is strictly controlled, and
data is registered on each head,
then finally is stored in the EEPROM
on the C228 DRV. Therefore, when
the head is replaced with the new
spare part, if the head ID and the
data stored on the EEPROM do not
match, this mismatch gives bad
influence on the dot weight and auto
color calibration, and as a result, it
causes bad printing quality.
Even in the condition that C228
DRV board needs to be replaced,
if the communication circuit with
PC is still alive, it is possible to
check the present head ID value
by bi-directional communication
on the exclusive program(service
program). After the C228 DRV
board is replaced, head ID can
be registered to EEPROM
immediately without removing the
head by inputting the data, which
you made a note in advance.
Table 5-6. Head Voltage Value Adjustment(Con.)
No. Conditions
2 C228 DRV Board Exchange
Following shows procedure.
Step1. Connect PC and printer with printer cable and turn both PC
and printer on.
Step2. Type the following sentence on the DOS or DOS Prompt.
C:\mode Ipt1:_retry=p
WARNING
Typing this sentence prevents PC from going to
Time Out Error, maintaining the scan mode until
the PC is able to recognize the printer ID correctly,
which comes back from the printer. If you ignore
this operation, the program may hang up on the
initial screen.
Step3. Type as following on the DOS Prompt for exclusive
program Stylus Pro.5000.EXE attached with this manual.
A(In case of FD): \spro.5000.EXE
WARNING
When typing the sentence above, the program
hangs up on the initial screen, if the printer is not
turned on. In this case, start again from Step1.
Chapter5 Adjustment
Reason
Even if the communication
became impossible on the C228
DRV or C228 Main board by
malfunction, the head ID can be
checked easily just by removing
the black cover from the top of
the carriage, since it is written on
the sticker attached on the top of
the head.
5-8