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SHARP SERVICE MANUAL JX8200SM [10] DIAGNOSTICS
(4) High voltage unit and charger unit operation
check
a. Menu display
VOL TEST XXX
b. Details
Press v key or w key to select the output mode.
Then press the FORM FEED (PAPER EXIT) key to output the high
voltage of the selected mode.
During the diagnostics operation, the output voltage can be changed
with v key and w key.
To cancel the diagnostics, press the RESET key.
OPERATION MODE
Main charger grid voltage (VOL TEST XXX)
Transfer charger voltage
Developing bias voltage
(*1): When the LINE (ONLINE) key is pressed in the transfer charger voltage output mode, the discharger is turned on. The output voltage is fixed
and cannot be changed.
(5) 8-color monochrome pattern print
The conditions for the above print operations can be individually set.
a. Menu display
TEST PRINT
b. Details
With "TEST PRINT" displayed, to execute the print test without set-
ting the operational conditions, press the FORM FEED (PAPER
EXIT) key.
During warming up and printing, "P=XXX", "H=XXX" (fusing tempera-
ture level), and "X T=XXX" (toner concentration level) are displayed.
The value of "H=XXX" is not the actual temperature.
In "X T=XXX," the left edge digits shows the kind of the developing
unit which is being stirred.The three-digit figure shows the toner con-
centration level of the developing unit which is being stirred. It is
normally about 128.
When the fusing temperature reaches the specified level (H=164,
equivalent to 170 degrees C) and the toner concentration level
reaches the specified level (XT=128 or its vicinity), printing is auto-
matically started.
If the above conditions are not satisfied, the error display is made.
To cancel the above operation halfway, press the RESET key. (The
operation is stopped after completion of that print.)
To set the operational conditions, press the ENTER (SET) key with
"TEST PRINT" displayed. The machine enters the print conditions
setting mode. Under this state, the operational condition setting items
can be selected with the MENU key.
The operational conditions can be changed with v key and w key.
To execute printing after setting the operational conditions, press the
RESET key to return to the TEST PRINT display and press the
FORM FEED (PAPER EXIT) key.
DISPLAY
LEVEL 1
LEVEL 2
VOL TEST MC CH
VOL TEST TC BIAS
(*1)
VOL TEST XX BIAS
DEFAULT
LEVEL 3
Output fixed (–557V)
TRANS BIAS
1294
When the set value is
XXXX
changed by 1, the output
voltage changes by 11 ∼ 12V.
XX BIAS XXX
400
When the set value is
changed by 1, the output
voltage changes by 2 ∼ 3V.
10 – 9
OUTPUT CHANGE RANGE
0 ∼ 3000V
250 ∼ 550V
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