Toshiba Estudio 230 Manual

							June 2004 © TOSHIBA TECe-STUDIO200L/202L/230/232/280/282 ADJUSTMENT
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(6) Install the door switch jig. 
(7) Close the transfer cover.
 Fig.3-22
Door switch jig
Front cover opening/closing switch 
						

							e-STUDIO200L/202L/230/232/280/282 ADJUSTMENTJune 2004 © TOSHIBA TEC
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[B] Connection for developer bias adjustment
 Fig.3-23
[C] Connection for main charger adjustment
 Fig.3-24
Front cover opening/closing switch
Ground to the 
machine frame ( green cable )
( -) 
terminal:
Connect with the white cable (
+ ) 
terminal:
Connect with the black cable
Front cover opening/closing switch
Ground to the 
machine frame ( green cable )
( -) 
terminal:
Connect with the white cable (
+ ) 
terminal:
Connect with the 
red cable  (
thick line ) 
						

							June 2004 © TOSHIBA TECe-STUDIO200L/202L/230/232/280/282 ADJUSTMENT
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[D] Connection for transfer/separation charger adjus tment
 Fig.3-25
Front cover opening/closing switch
Ground to the 
machine frame ( green cable )
( - ) 
terminal:
Connect with the white cable (
+ ) 
terminal:
Connect with the 
red cable  (
thin line ) 
						

							e-STUDIO200L/202L/230/232/280/282 ADJUSTMENTJune 2004 © TOSHIBA TEC
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[ 2 ] Operation
Note: Note: 
When adjusting output of high-voltage transformer,  make sure to use the high-voltage trans-
former jig.
Connect the digital testers as described in “[1] Pr eparation”, and follow the procedure on the next 
page to adjust the output from the main charger, de veloper bias charger, transfer charger and sepa-
ration charger.
 Fig.3-26
100% A3
A
TEST MODE
100% XXX
YYY A3
TEST MODE
100% A3
A
TEST MODE
Return to  1  to enter 
the other adjustment
code.
[0][5]
[POWER]
Press the front cover 
opening/closing switch.
[UP] or [DOWN] : Adjust the value “YYY” to satisfy the following table. [Digital keys]
[START] : Enter the code.
[POWER] : OFF/ON Code
210
Adjustment value -495±5V
Code No.
Current set value


[SET] or
[INTERRUPT]
: Adjusted value “YYY” is stored in memory.
1
Developer bias Main charger205
-357±5V
Code 221
Adjustment value 1407±141mV
Transfer charger
Leading edge area of paper Center area
of paper
222
1005±106mV Trailing edge
area of paper
220
1326±141mV
Code 234
Adjustment value -566±72mV
Separation charger
Leading edge area of paper Center area
of paper
235
-391±36mV
Trailing edge
area of paper
233
-566±72mV 
						

							June 2004 © TOSHIBA TECe-STUDIO200L/202L/230/232/280/282 ADJUSTMENT
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3.6.2 Precautions 
[ 1 ] Developer bias
Note for adjustment 
Adjust the developer bias if fogging occurs over the  entire image even though the main charger grid 
voltage and toner density are appropriate. However,  the following may occur if the developer bias is 
lowered too much: 
 Image contrast becomes low. 
 Image is patchy or blurred. 
 The carrier in the developer material adheres to t he photoconductive drum, causing scratches 
around the cleaner.
[ 2 ] Transfer
Items to check before adjustment 
Blotched image or poor transfer can be also caused  by matters other than defective adjustment of 
transfer output. Check the following items before ad justing the transfer charger. If there is no problem, 
adjust the output of the transfer charger. 
 Is the charger wire incorrectly installed  or dirty? Is the transfer guide deformed?
 Is the process unit properly installed? Is the dev eloper magnetic brush in contact with the drum?
Is the process unit worked correctly? Is the toner  density low?
 Is the copy paper fed straight? Is the copy paper  abnormally moist?
 Is the rotation of the registration roller normal? 
 Is the separation output different from the set va lue?
 Is the developer bias value an appropriate one? 
 Are the transfer/separation charger case grounded?  Is the high-voltage transformer grounded?
Note for adjustment
When blotched image appear:
 If blotched image appear in halftone areas, lower  the transfer output value. Remember that transfer 
performance becomes low if the transfer output valu e is lowered too much.
When poor transfer occurs:
Increase the transfer output value under the follow ing conditions. Remember that blotched image 
appear if the transfer output value is increased to o much.
 Transfer is poor even though the charger wire is n ot dirty.
 Thick paper has been frequently used. 
The adjustment code varies according to where blotc hed image and poor transfer occur. Select the 
required adjustment code while referring to the fol lowing diagram.
 Fig.3-27
220
Approx. 11mm
Adjustment code Leading edgearea of paper Trailing edge 
area of paper221222
Approx. 5mm 
						

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[ 3 ] Separation
Items to check before adjustment 
Poor paper separation from the drum can be also cau
sed by matters other than defective adjustment of 
the separation output. Check the following items be fore making an adjustment. If there is no problem, 
adjust the output of the separation charger. 
 Is the charger wire incorrectly installed or dirty ?
 Is the process unit installed properly? Is the dev eloper magnetic brush in contact with the drum?
Is the process unit worked correctly? Is the toner  density low?
 Is the copy paper fed straight? Is the copy paper  abnormally moist?
 Is the rotation of the registration roller normal? 
 Is the output of the main charger normal? 
 Is the developer bias an appropriate value? 
 Is the transfer output different from the set valu e?
 Is the transfer/separation charger case grounded?  Is the high-voltage transformer grounded?
 Is the separation finger in contact with the drum  surface?
Note for adjustment 
When poor paper separation occurs:
Increase the separation output value under the foll owing conditions. Remember that if the separation 
output value is increased too much, blotched image  occurs and separation performance becomes low.
 Poor separation occurs even though the charger wir e is not dirty.
 Thin paper has been frequently used. 
When poor transfer occurs:
 Decrease the separation output value when poor tra nsfer occurs. Remember that the separation 
performance becomes low if the separation output va lue is decreased too much.
The adjustment code varies according to where poor  paper separation and poor transfer occur. Select 
the required adjustment code while referring to the  following diagram.
 Fig.3-28
* Adjustment code 235 performs the adjustment for 2  areas.
233
Approx. 11mm
235
Approx. 35mm
Adjustment code Leading edgearea of paper Trailing edge 
area of paper234235
Approx. 48mm 
						

							June 2004 © TOSHIBA TECe-STUDIO200L/202L/230/232/280/282 ADJUSTMENT
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3.7 Adjustment of the Scanner Section 
3.7.1 Carriages
[A] Installing carriage wires 
When replacing the carriage wires, refer illustrati ons below:
[Front side]
 Fig.3-29
[Rear side]
 Fig.3-30
Adjustment of the carriage wire tension is not nece ssary since a certain tension is applied to the car-
riage wires by the tension springs.
Note: Note:  Make sure the tension applied to the wire is normal .
Carriage-2
Idler pulley
Tension spring
Wire pulley Bracket for carriage-1
Hook
Carriage wire
Carriage-2
Carriage wireBracket for carriage-1
Hook
Wire pulley
Tension spring
Idler pulley 
						

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[B] Adjusting carriages-1 and -2 positions 

(1) Move the carriage-2 toward the exit side. 
(2) Loosen the screws fixing the front side pulley b racket, make the sections A and B of the carriage-
2 touch with the inside of the exit side frame and  screw them up.
 Fig.3-31
Carriage-2
Pulley bracket
[Rear] [Front]
Exit side frame
A
B 
						

							June 2004 © TOSHIBA TECe-STUDIO200L/202L/230/232/280/282 ADJUSTMENT
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(3) Put the carriage-1 on the rail, make the section s C and D of it touch with the inside of the exit 
side frame and screw up the front/rear sides of the  bracket to fix it.
Note: Note: 
Make sure that the sections A and B of the carriage -2 touch with the exit side frame.
 Fig.3-32
Carriage-1
[Rear] [Front]
Exit side frame
Bracket
Bracket
C
D 
						

							e-STUDIO200L/202L/230/232/280/282 ADJUSTMENTJune 2004 © TOSHIBA TEC
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[C] Assembling carriage wires (Winding the wire arou nd the wire pulley)

(1) Pull the Ø3 ball terminal located at the center  of the wire into a hole on the wire pulley. One end 
of the wire with a hook attached comes to the outsi de.
(2) Wind the wires around the wire pulleys of the fr ont and rear sides. The number of turns to be 
wound are as follows: 
 2 turns toward the opposite side of the boss 
 4 turns toward the boss side
Note: Note:  Pay attention to the following when the wires are wo und around the pulleys:
- Do not twist the wire. 
- Wind the wires tightly so that they are in complet e contact with the surface of the pulleys.
- Each turn should be pushed against the previously w ound turn so that there is no space 
between them.
 Fig.3-33
4 turns4 turns
2 turns
2 turns
No space between turns
Ball terminal
Ball terminal
Color: Black
Color: Silver
Hook
Hook
[Rear][Front]