Panasonic KX-TG8521UAB / KX-TGA850RUB (serv.man2) Service Manual ▷ View online
45
KX-TG8521UAB/KX-TGA850RUB
10.1.2. Handset
Ԙ
Remove the 2 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.
Remove the 2 screws to remove
the 2 charge terminals.
the 2 charge terminals.
ԝ
Ԟ
Remove the screw to remove
the main P. C. board.
the main P. C. board.
Main P.C. board
Ԝ
Screw
Ԟ
2 charge terminals
ԝ
ԝ
2 screws
Cabinet cover
Cabinet body
Cabinet cover
2 screws
Ԙ
Solders and
Tape
Tape
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KX-TG8521UAB/KX-TGA850RUB
10.1.3. Charger Unit
Ԙ
R
emove the screw to remove
the cabinet cover.
ԙ
R
emove the solders to remove
the 2 charge terminals.
Ԛ
R
emove the screw to remove
the main P. C. board.
Ԙ
Screw
Ԛ
Screw
ԙ
Solders
Main P.C. board
2 charge terminals
Cabinet cover
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KX-TG8521UAB/KX-TGA850RUB
10.2. How to Replace the Handset LCD
Solder the narrow Cable to the P.C.B.
*When soldering, don't give the load to the FPC.
*When soldering, don't give the load to the FPC.
1
2
Attach LCD to P.C.B.
*When attaching the LCD holder,
don't pull the FPC (Flexible Print Circuit).
*When attaching the LCD holder,
don't pull the FPC (Flexible Print Circuit).
Locate the Flat Cable inside as shown.
3
A
A
P.C.B.
Solder (2 points)
(Lock.)
Peel off the double side tape
before soldering.
before soldering.
Lock.
B
FPC
A
A
B
P.C.B.
LCD
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KX-TG8521UAB/KX-TGA850RUB
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.26)
Troubleshooting Guide (P.26)
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: PNZZTG8521UA
• PC which runs in DOS mode
• Batch file CD-ROM for setting: PNZZTG8521UA
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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