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89

The codes listed below can be used to perform simple checks of some of the unit’s functions. When complaints are received
from customers, they provide an effective tool for identifying the locations and causes of malfunctions.

Test Mode

Type of Mode

Code

Function

Operation after code 

input

MOTOR TEST & 
High Voltage Power 
Supply Board 
CHECK

Service Mode

"5" "5" "6"

0: Recording paper feed
1: Auto Document feed (STANDARD)
2: Auto Document feed (FINE)
3: Auto Document feed (SUPER FINE)
Refer to High Voltage Value Check Point (P.132).

SET

MODEM TEST

Service Mode

"5" "5" "4"

Telephone line circuit is connected automatically, output the following signals on
the circuit line. 
1) OFF     2) 14400bps   3) 12000bps   4) 96V17    
5) 72V17   6) 9600bps  7) 7200bps 　8) 4800bps     
9) 2400bps   10) 300bps   11) 2100Hz    12) 1100Hz   

SET

ROM CHECK

Service Mode

"5" "5" "1"

Indicates the version and checks the sum of the ROM. 

SET

LCD CHECK

Service Mode

"5" "5" "8"

Checks the LCD indication. 
Illuminates all the dots to check if they are normal. 
Refer to Operation Panel Section (P.125).

SET

LED CHECK

Service Mode

"5" "5" "7"

All LEDs above the operation panel board flash on and off, or are illuminated. 

SET

KEY CHECK

Service Mode

"5" "6" "1"

Checks the button operation. 
Indicates the button code on the LCD while the button is pressed. Refer to But-
ton Code Table (P.91).
Refer to Operation Panel Section (P.125).

START (any key)

CIS TEST

Service Mode

"5" "5" "5"

LED lights up, CIS scanning.
Refer to CIS (Contact Image Sensor) Section (P.131).

LSU TEST

Service Mode

"6" "3" "9"

Laser radiates, Polygon rotates
Refer to LSU Section (P.130).

MEMORY CLEAR

Service Mode

"5" "5" "0"

To reset the value to the default one, except the top margin (#853), left margin
(#854), time / day (#001), logo (#002), Fax no. (#003), History and Directory data.
Please restart a power supply after clearing a memory.

SET

FAN TEST

Service Mode

"6" "7" "7"

1:TEST OFF
2:High-speed rotation
3:Low-speed rotation

SET

MEMORY CLEAR

Service Mode

"7" "1" "0"

Refer to Memory Clear Specification (P.96). 

SET

VOICE PROMPT 
CHECK

Service Mode

"7" "8" "4"

You can hear the voice prompt from speaker after pressing "SET" key. 

SET

90

The numbers in the boxes (XXX) indicate the keys to be input for the various test modes.

SENSOR CHECK 

Service Mode

"8" "1" "5"

First of all, press the copy button, and confirm the action of ON/OFF. 
For each sensor's operation, refer to Sensors and Switches Section (P.43).
D S C P R E D T * 3F * D 4 * V   : LCD DISPLAY

D: Document set
 -: No document

S: Read position
 -: No read position

C: Open
 -: Close

P: Recording paper set
 -: No recording paper

R: Detect recording paper
 -: Not defect recording paper

E: Detect recording paper
 -: Not detect recording paper

D: DRUM set
 -: No DRUM

T: Toner sensor ON
 -: Toner sensor OFF 

Hex (00-FF)

Hex (00-FF)

V: Detect the tone on the line 
 -: Not detect

PRINT TEST PAT-
TERN

Service Mode

"8" "5" "2"

1. Press "852" then the SET key in the service mode.
2. As "PATNO. =" is displayed on the LCD, enter the test pattern No. and press
the SET key.
3. When "No. =" is displayed on the LCD, enter the printing number and press the
SET key. (Press "00" for the infinite printing.)
4. "MODE" is displayed on the LCD. Press "0" to start printing or press "1" to go to
the next screen. 
5. When "1" is pressed at MODE, "INTVL =" is displayed on the LCD. Enter the
printing interval (000~999 sec).
6. The printing repeats the designated number of times at the programmed print-
ing intervals.

SET

Test Mode

Type of Mode

Code

Function

Operation after code 

input

91

92

1. NO.01

2. NO.06

3. NO.03

• These print test patterns are just image printing, and differ-

ent from actual ones.
When it is required to judge the print quality, compare with
the printing of a nondefective machine.