Panasonic KX-TG5521CAB / KX-TGA551RUB (serv.man2) Service Manual ▷ View online
46
KX-TG5521CAB/KX-TGA551RUB
10.1.2. Handset
Ԙ
Remove the 4 screws.
ԙ
Insert a JIG (PQDJ10006Y)
between the cabinet body
and the cabinet cover, then
pull it along the gap to open
the cabinet.
between the cabinet body
and the cabinet cover, then
pull it along the gap to open
the cabinet.
Ԛ
Likewise, open the other
side of the cabinet.
side of the cabinet.
ԛ
Remove the cabinet cover
by pushing it upward.
by pushing it upward.
Ԝ
Remove the solders and tape.
ԝ
Remove the screw to remove
the main P. C. board.
the main P. C. board.
Cabinet cover
Cabinet body
Cabinet cover
4 screws
Ԙ
Main P.C. board
Ԝ
Screw
ԝ
Solders and
Tape
Tape
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KX-TG5521CAB/KX-TGA551RUB
10.1.3. Charger Unit
①
Screw
②
Solders
Main P.C. board
Cabinet cover
①
Remove the screw to remove
the cabinet cover.
the cabinet cover.
②
Remove the solders to remove
the 2 charge terminals.
the 2 charge terminals.
2 charge terminals
③
Screw
③
Remove the screw to remove
the main P.C. board.
the main P.C. board.
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KX-TG5521CAB/KX-TGA551RUB
10.2. How to Replace the Handset LCD
Note:
The illustrations are simplified in this page.
They may differ from the actual product.
They may differ from the actual product.
Peel off the FFC (Flexible Flat Cable) from
the LCD, in the direction of the arrow. Take
care to ensure that the foil on the P.C. board
is not damaged.
the LCD, in the direction of the arrow. Take
care to ensure that the foil on the P.C. board
is not damaged.
Fit the heatseal of a new LCD.
Rubber of Soldering Iron
(Part No. PQZZ430PRB)
(Part No. PQZZ430PRB)
Tip of Soldering Iron
(Part No. PQZZ430PIR)
Heatweld with the tip of the soldering
iron about 5 to 8 seconds
(in case of 60W soldering iron).
iron about 5 to 8 seconds
(in case of 60W soldering iron).
New LCD
0.2 mm
0.2 mm
P. C. board
If interval tolerance between center lines
is less than 0.2 mm, it is o.k.
is less than 0.2 mm, it is o.k.
Horizontal Interval
Tolerance
Tolerance
Vertical Interval
Tolerance
Tolerance
OK
NG
NG
NG
(Horizontal interval tolerance is
more than 0.2 mm.)
more than 0.2 mm.)
(Vertical interval tolerance is
more than 0.2 mm.)
more than 0.2 mm.)
(Inclined)
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KX-TG5521CAB/KX-TGA551RUB
11 Measurements and Adjustments
This chapter explains the measuring equipment, the JIG connection, and the PC setting method necessary for the measurement in
Troubleshooting Guide (P.24)
Troubleshooting Guide (P.24)
11.1. Equipment Required
• Digital multi-meter (DMM): it must be able to measure voltage and current.
• Oscilloscope.
• Frequency counter: It must be precise enough to measure intervals of 1 Hz (precision; ±4 ppm)
• Oscilloscope.
• Frequency counter: It must be precise enough to measure intervals of 1 Hz (precision; ±4 ppm)
Hewlett Packard, 53131A is recommended.
• DECT tester: Rohde & Schwarz, CMD 60 is recommended.
This equipment may be useful in order to precisely adjust like a mass production.
11.2. The Setting Method of JIG (Base Unit)
This section explains the PC setting to use command required in Check Point (Base Unit)(P.36).
<Preparation>
• Serial JIG cable: PQZZ1CD300E*
• PC which runs in DOS mode
• Batch file CD-ROM for setting: PNZZTG5521CA
• PC which runs in DOS mode
• Batch file CD-ROM for setting: PNZZTG5521CA
Note:
*: If you have the JIG Cable for TCD500 series
(PQZZ1CD505E), change the following values of
resistance. Then you can use it as a JIG Cable for both
TCD300 and TCD500 series. (It is an upper compatible JIG
Cable.)
resistance. Then you can use it as a JIG Cable for both
TCD300 and TCD500 series. (It is an upper compatible JIG
Cable.)
11.2.1. Connections
Connect the AC adaptor to DC-JACK (base unit).
Connect the JIG Cable GND (black) to GND.
Connect the JIG Cable RX (red) to URX and TX (yellow) to UTX.
Connect the JIG Cable GND (black) to GND.
Connect the JIG Cable RX (red) to URX and TX (yellow) to UTX.
Note:
*: COM port names may vary depending on what your PC calls it.
Resistor
Old value (k
Ω) New value (kΩ)
R2
22
3.3
R3
22
3.3
R4
22
4.7
R7
4.7
10
1
2
3
2
3
Base unit P. C. board
UTX (yellow)
AC adaptor
1
3
2
3
GND (black)
URX (red)
To Serial Port
(COM port 1*)
(COM port 1*)
JIG Cable
PC
GND
UTX
URX
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