Measurements And Adjustments; Cordless Base Section (Digital Board) Adjustment - Panasonic KX-FC255CX-S Service Manual

15 Measurements and Adjustments

15.1. Cordless Base Section (Digital Board) Adjustment

When you have replaced EEPROM or BBIC or X'tal, adjustment is necessary.
This supplement will explain further details for adjustment.
15.1.1. Equipment Required
1. PQZZ1CD300E*
3 wire cable: It connect the Digital Board and PC.
2. PFZZFC255CX
Batch Files: it's executed on PC.
Please copy "Base" folder in PFZZFC255CX (CD-ROM)
folder including Batch files to your PC.
3. PC
Input a command for adjustment.
4. Frequency Counter
It's to adjust frequncy(10.368000MHz) of BBIC.
It requires an accuracy that can measure 1Hz. (precise;
±1ppm)
5. Digital multimeter
It's to adjust voltage (1.8V) of BBIC.
15.1.2. PC Setting
15.1.2.1. Connections
At pins of CN2 on the back side of the digital board
Please connect the component and the cable as follows:
Refer to Adjustment Standard (Base Unit) (P.175).
*1: 10k resistor: Please put it between 1pin and 2pin and connect TX cable from PC. (ERDS2TJ103T or ERDS1TJ103T)
*2: 1k resistor: Please put it between 9pin and 2pin and connect RX cable from PC. (ERDS2TJ102T or ERDS1TJ102T)
*3: wire: Please put it between 11pin and 14pin (shorted) and connect GND cable from PC. (This makes a board 3 wire mode.)
*4: 2 wires: Please put it 12pin and 14pin. Please connect 2 wires after turning power on. (this makes reset)
Note:
*: If you have the JIG Cable for FC245 series (TCD500
series) [PQZZ1CD505E], change the following values of
resistance. Then you can use it as a JIG Cable for both this
model and FC245 series (TG8100 and TCD500 series). (It
is an upper compatible JIG Cable.)
Resistor
R2
R3
R4
R7
171
KX-FC255CX-S
Old value (kΩ) New value (kΩ)
22 3.3
22 3.3
22 4.7
4.7 10