Canon i-SENSYS MF4120, Service Manual

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Chapter 13
13-10
13.4.2 Faculty Test
13.4.2.1 Print test pattern
0014-7745
i-SENSYS MF4150 / i-SENSYS MF4140 / i-SENSYS MF4120 /
From the FUNCTION menu, select PRINT TEST PATTERN.
In this test, the printer unit will be used to print various patterns. For service work, be sure to use the BLACK pattern and the SQUARE pattern.
Use the BLACK print pattern to meke sure that the printout is free of white lines and unevenness; on the other hand, use the SQUARE printout to make sure that
the printout is free of image contraction, elongation, and soiling.
MEMO
After completion of the print test, if the printing was normal, copy a document. If there is any defect in the copied image, there is a defect in the scan
section.
13.4.2.2 Sensor test
0014-7746
i-SENSYS MF4150 / i-SENSYS MF4140 / i-SENSYS MF4120 /
SENSOR TEST is selected from the H/W TEST menu. In this test, the state of each sensor of this machine can be checked on the display. For the sensor that uses
the sensor arm and the microswitch, the output of the sensor can be confirmed by moving them by the hand.
F-13-10
13.4.2.3 Key test
0014-7747
i-SENSYS MF4150 / i-SENSYS MF4140 / i-SENSYS MF4120 /
KEY TEST is selected from the H/W TEST menu. In this test, whether the button on the operation panel works correctly can be checked.
Operation key test
In this test, the character on the display disappears when the key corresponding to the character is pushed. The correspondence table of the character and
the key is as follows.
When the key is pushed for all keys, it is checked that the corresponding character on the display disappears.
T-13-17
One-touch dial key test
When the OK button is pushed, it becomes an one-touch dial key test.
The a thorough h characters corresponding to One-touch01 through 08 key are displayed. The character corresponding to respectively disappears when
an one-touch key is pushed. Check that all characters disappear after all one-touch keys are pressed.
Character Operation button Character Operation button Character Operation button
0-9,*,# Numeric key, tone key K [Start] key V [Hook] key
A [COPY] key L [Clear] key a One-Touch Speed Dial
[01] key
B [SCAN] key M [Energy Saver] key b One-Touch Speed Dial
[02] key
C [Additional
Functions] key N [View Settings] key c One-Touch Speed Dial
[03] key
D [System Monitor] key O [2-Sided] key d One-Touch Speed Dial
[04] key
E [Enlarge/Reduce] key P [Toner Gauge] key e One-Touch Speed Dial
[05] key
F [Density] key Q [OK] key f One-Touch Speed Dial
[06] key
G [Image Quality] key R [FAX] key g One-Touch Speed Dial
[07] key
H [Collate/2 on 1] key S [Address Book] key h One-Touch Speed Dial
[08] key or [Reset] key
I [+] key T [Coded Dial] key
J [-] key U [Redial/Pause] key
SENSOR TEST
HOOK1 TEST
HOOK2 TEST
ADF DS TEST
ADF DES TEST
CRG TEST
TN VALUE
RING DETECT
CNG DETECT(AnsMode)
CNG DETECT(FAX/TEL) : handset status
:
: ADF detect
: ADF detect
: toner remain value (0-255)