DOWNLOAD Panasonic KX-FT57E Service Manual ↓ Size: 3.76 MB | Pages: 127 in PDF or view online for FREE

89

KX-FT57E

TROUBLESHOOTING GUIDE

1  CCD

2  GATE

about 1.0 Vp-p

5 Vp-p

MASSE 
DES KANALS 1

MASSE 
DES KANALS 2

Read section waveform

Oscilloscope setting

V: CH1

0.5 V/div

     CH2

5 V/div

     DC couple, CHOP mode

H: 1 msec / div

Trigger: CH2 SLOPE (+)

Probe point: GND Test point ÒAGÓ

                     CH1 Test point ÒVIDÓ

                     CH2 Test point ÒFTGÓ

Waveform:

CH1: CCD signal

CH2 FTG: GATE signal (trigger)

Note: This waveform will be shown when the CCD reads

          the white plate of the document cover.

90

KX-FT57E

about
0.6Vp

•

p

about
1.0Vp-p

about
1.5V

1.5V

0.5 V/div
AC couple

0.5 V/div
AC couple

1 V/div
DC couple

GND

IC801 pin 1 (CCD Board)
 
CN801 pin 7 (CCD Board)
 
IC1 pin 39 (AMON) (Digital board)

No.         CH1 probe point

3 -1

3 -2

4

 3 -1

 3 -2

 4

91

KX-FT57E

TROUBLESHOOTING GUIDE

Is the voltage at pins 
5,6 of CN301 23~24 V? (Power unit )

Is the voltage at pin 119 
of IC1 4~5 V? (Digital 
board)

Is the voltage at pin 8 of CN251
(Analog board) 0~1 V? (When copying)

Is the amplitude at
pins 1, 4~7 of CN11
4~5 Vp-p?

Check the switching 
power supply section.
(Refer to page 79.)

Check the solder at pin 
119 of IC1 or pin 8 of
CN251.

Check R47, R48, R49, 
C37, C38 and C39.

Replace the thermal
head.

Check IC1.

Check the voltage at pin
38 of IC1, 3 V (0    )    V    2V
(65    ) at about 2.6V (25    ).

Take out CN11 and check the
amplitude again.

Take out CN11 and 
check the amplitude 
again.

Check the solder at pins
22, 25~28 of IC1 or re-
place IC1. (Digital board)

Is the amplitude at pins 
1~3 of CN11 4~5 Vp-p?

Check the cable of CN11
and CN301. (Power unit)

Check the solder at pins 
23, 24 of IC1.

Replace the thermal head.

YES

NO

NG

YES

YES

YES

YES

NO

NO

NO

NO

OK

OK

OK

OK

NG

NG

92

KX-FT57E

4. PROGRAMMING AND LISTS

The programming functions are used to program the various features and functions of the unit, and to test the unit.
Programming can be done in both the on-hook and off-hook conditions. This facilitates communication between the user
and the service while programming the unit.

4-1.  OPERATION

There are 2 basic categories of programming functions, the User Mode and the Service Mode. The Service Mode is
further broken down into the normal and special programs. The normal programs are those listed in the
Operating Instructions and are available to the user. The special programs are those listed only here and are not given
to the user. In both the User and Service Mode, there are Set Functions and Test Functions. The Set Functions are
used to program various features and functions, and the Test Functions are used to test the various functions.
The Set Functions are accessed by entering their code, changing the appropriate value, then pressing the SET key.
The Test Functions are accessed by entering their code and pressing the key listed on the menu. While programming,
to cancel any entry, press the STOP key.

4-2. OPERATION FLOW

Programming

User mode
(user programmable)

Service mode
(not user programmable)

(2) SET mode

(1) TEST mode

Normal

Special

(3) SET mode

(4) SET mode
(5) TEST mode

PRINT mode (prints out a list to confirm
the set values)

PRINT mode (prints out a
 list to confirm the set values)

User mode
Print out

User mode

Operating Procedure

MENU button

LCD

  SYSTEM SET UP

#

LCD

SETUP ITEM [          ]

XXXXXXX

Follow the instructions on the LCD.

Code

MENU button

MENU button

(Some codes are for the Test Functions, while others are for the Set Functions.)

LCD

 PRINT LIST

    button

START/COPY/SET button

# 9 0 0 0

Code

Set value
Print out

XXXXXXX

 (Some codes are for the Test Functions and some are for the special
Set Functions, while others are for the normal Set Functions.)

Follow the instructions on the LCD.

Service mode

START/COPY/SET button

LCD
P-SF

START/COPY/SET button

BASIC LIST / ADVANCED LIST

LCD