Measurements And Adjustments; Equipment Required; The Setting Method Of Jig - Panasonic KX-TG3721BXB Service Manual

12 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.33)

12.1. 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)
Hewlett Packard, 53131A is recommended.
This equipment may be useful in order to precisely adjust like a mass production.

12.2. The Setting Method of JIG

<Preparation>
• Serial JIG cable: PQZZ1CD300E*
• PC which runs in DOS mode
• Batch file CD-ROM for setting: PNZZTG3721BX
12.2.1. Connections (Base Unit)
Connect the AC adaptor.
Connect the JIG Cable GND (black).
Connect the JIG Cable RX (red) and TX (yellow).
1
AC adaptor
Note:
*: COM port names may vary depending on what your PC calls it.
UTX URX GND
Base unit P. C. board
51
Note:
*: If you have the JIG Cable for TCD500 series
(PQZZ1CD505E), change
resistance. Then you can use it as a JIG Cable for both
TCD300 and TCD500 series. (It is an upper compatible JIG
Cable.)
Resistor Old value (kΩ)
R2 22
R3 22
R4 22
R7 4.7
3 UTX (yellow)
URX (Red)
3
2
GND (black)
JIG Cable
KX-TG3721BX/KX-TG3722BX/KX-TGA371BX
the following values
New value (kΩ)
3.3
3.3
4.7
10
To Serial Port
(COM port 1*)
PC
of