Panasonic KX-TGA280BXS, Service Manual

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KX-TG2853BXS/KX-TG2854BXS/KX-TGA280BXS
12.3. The Setting Method of JIG (Handset)
12.3.1. Preparation
12.3.1.1. Equipment Required
• Frequency counter: It must be precise enough to measure intervals of 1 Hz (precision; ±4 ppm).
Hewlett Packard, 53131A is recommended.
• DC power: It must be able to output at least 1 A current under 2.4 V for handset.
• Digital multi-meter (DMM): It must be able to measure voltage and current.
• Oscilloscope
12.3.1.2. JIG and PC
• Serial JIG
JIG Cable: PQZZ1CD300E*
• PC which runs in DOS mode.
•
Batch file CD-ROM for setting: PQZZTG2873BX
Note:
*: If you have the JIG Cable for TCD500 series
(PQZZ1CD505E), change the following values of resis-
tance.
12.3.2. PC Setting
12.3.2.1. Connections
Connect the DC Power or Battery to CHG- and CHG+ (handset).
Connect the JIG cable GND (black).
Connect the JIG cable UTX (yellow) and URX (red).
Note:
*: COM port names may vary depending on what your PC calls it.
Resistor Old value (k
Ω
) New value (k
Ω
)
R2 22 3.3
R3 22 3.3
R4 22 4.7
R7 4.7 10