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The codes listed below can be used to perform simple checks for 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. To do this, you set the
Service mode (Refer to Operation Flow (P.58).) first, then operate the below test items.

Test Mode

Type of Mode

Code

Function

Operation after code 

input

MEMORY CLEAR

Service Mode

[5]  [5]  [0]

Refer to Memory Clear Specification (P.61).

[SET]

FLASH MEMORY 
CHECK

Service Mode

[5]  [5]  [1]

Indicates the version and checks the sum of the FLASH MEMORY. 

[SET]

DTMF SINGLE TONE 
TEST

Service Mode

[5]  [5]  [2]

Outputs the DTMF as single tones. Used to check the frequencies of the individ-
ual DTMF tones. Refer to DTMF Single Tone Transmit Selection (P.55).

[1]: ON

 [2]: OFF

MODEM TEST

Service Mode

[5]  [5]  [4]

Telephone line circuit is connected automatically, output the following signals on 
the circuit line. 
1) OFF 2) 9600bps 3) 7200bps 4) 4800bps 5) 2400bps 6) 300bps 7) 2100Hz 
8) 1100Hz

[SET]

SCAN TEST

Service Mode

[5]  [5]  [5]

Turns on the LEDs of the CIS and operates the read systems. 
Refer to CIS (Contact Image Sensor) Section (P.125).

[SET]

MOTOR TEST

Service Mode

[5]  [5]  [6]

Rotates the transmission and reception motor to check the operation of the motor.

02: FAX TX / Reading memory
06: Cutter (KX-FT984/KX-FT988 only)
08: Recording paper is fed 
10: Copy
13: Recording Paper reverse

 Press [STOP] button to quit.

[SET]

LED TEST

Service Mode

[5]  [5]  [7]

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

[SET]

LCD TEST

Service Mode

[5]  [5]  [8]

Checks the LCD indication. 
Illuminates all the dots to check if they are normal.
Refer to No LCD Indication (P.122).

[SET]

KEY TEST

Service Mode

[5]  [6]  [1]

Checks the key operation except [STOP] key. 
Indicates the button code on the LCD while the button is pressed, see Button 
Code Table (P.56)
Refer to No Key Operation (P.122).

The available key is 
any one that except 
[STOP] key.

CUTTER TEST
(KX-FT984/KX-FT988 
only)

Service Mode

[5]  [6]  [2]

Perform cutter test 10 times. 

[SET]

MEMORY CLEAR
(except History data)

Service Mode

[7]  [1]  [0]

Refer to Memory Clear Specification (P.61).

[SET]

VOICE PROMPT TEST
(KX-FT988 only)

Service Mode

[7] [8] [4]

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

[SET]

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When set to ON (=1), the 12 keys and transmission fre-
quencies are as shown.

When set to OFF (=2), the 12 keys and transmission fre-
quencies are as shown.

After performing this check, do not forget to turn the setting off.
Otherwise, dialing in DTMF signal will not work.

SENSOR TEST & 
VOX TEST

Service Mode

[8]  [1]  [5]

If you enter this mode and operate sensor levers with your hands, the LCD display 
of the related sensor (or switch) turns ON / OFF. Also, when copying a document, 
the related sensor will turn ON / OFF.
For each sensor’s operation, refer to Sensors and Switches (P.27).

Paper inserted. Turns on when a document is inserted.

At the read position, turns on when the front cover is opened and the sensor 
lever is pressed directory.

Turns on and off when the front cover is opened and closed. 

When JAM sensor is on “Jm” functions.

When cutter sensor is on “Ct” functions.

:Detection signal for the tone on the line. Turns on when there is a tone signal 
on the line

• Press [STOP] button to quit.

[SET]

DIGITAL 
SPEAKERPHONE 
RX & TX CHECK
(KX-FT988 only)

Service Mode

[8] [4] [1]

Refer to Digital Speakerphone (KX-FT988 only) (P.117).

SPEAKERPHONE

PRINT TEST 
PATTERN

Service Mode

[8]  [5]  [2]

Prints out the test pattern.
You can select 1~4. (See Print Test Pattern (P.57))

[SET]

Test Mode

Type of Mode

Code

Function

Operation after code 

input

key

High Frequency (Hz)

key

Low Frequency (Hz)

“1”

697

“5”

1209

“2”

770

“6”

1336

“3”

852

“7”

1477

“4”

941

“8”

1633

High (Hz)

1209

1336

1477

Low (Hz)

697

“1”

“2”

“3”

770

“4”

“5”

“6”

852

“7”

“8”

“9”

941

“

”

“0”

“#”

56

Code 

Button Name

Code

Button Name

Code

Button Name

04

FAX /START

31

1

47

AOH

05

LOWER

32

2

06

COPY

33

3

64

STATION KEY 1

08

MONITOR /
DIGITAL SP-PHONE

34

4

65

STATION KEY 2

09

BROADCAST

35

5

66

STATION KEY 3

0A

HANDSET MUTE / MUTE

36

6

67

STATION KEY 4

0C

AUTO ANSWER

37

7

68

STATION KEY 5

0D

SET

38

8

1E

[ ] NEXT

39

9

1F

[

] PREV

3A

0

00

NO INPUT

3B

 -- 

STOP

14

RECORD (KX-FT988 only) 

3C

#

16

ERASE (KX-FT988 only) 

3D

REDIAL/PAUSE

18

PLAYBACK (KX-FT988 only) 

3E

FLASH (RECALL)

20

MENU

25

[ + ] VOLUME

26

[—] VOLUME