Panasonic KX-FC228UA-T / KX-FC228RU-T Service Manual ▷ View online
121
KX-FC228UA-T/KX-FC228RU-T
After the power is turned on, the ASIC initializes and checks each IC.
The ROM, DRAM, and modem are checked.
If initialization fails for the ICs, the system will not boot up.
In this case, please find the cause as follows.
The ROM, DRAM, and modem are checked.
If initialization fails for the ICs, the system will not boot up.
In this case, please find the cause as follows.
REFERENCE:
NG Example (P.123)
Power Supply Board Section (P.126)
Power Supply Board Section (P.126)
122
KX-FC228UA-T/KX-FC228RU-T
Other NG example while the power is ON and the LCD displays the following.
Note:
Refer to Translation Lists (P.10) for display.
123
KX-FC228UA-T/KX-FC228RU-T
12.5.5.2. NG Example
124
KX-FC228UA-T/KX-FC228RU-T
12.5.6. Analog Board Section
This chapter provides the testing procedures required for the analog parts. A signal route to be tested is determined depending
upon purposes. For example, the handset TX route begins at the handset microphone and the signal is output to the telephone
line. The signal mainly flowing on this route is analog. You can trace the signal with an oscilloscope. The signal flow on each
route is shown in the Check Sheet here. If you find a specific problem in the unit, for example if you cannot communicate with
the H/S, trace that signal route locally with the following Check Sheet and locate the faulty point.
upon purposes. For example, the handset TX route begins at the handset microphone and the signal is output to the telephone
line. The signal mainly flowing on this route is analog. You can trace the signal with an oscilloscope. The signal flow on each
route is shown in the Check Sheet here. If you find a specific problem in the unit, for example if you cannot communicate with
the H/S, trace that signal route locally with the following Check Sheet and locate the faulty point.
12.5.6.1. Check Sheet for Signal Route
Click on the first or last page to see other KX-FC228UA-T / KX-FC228RU-T service manuals if exist.