Panasonic KX-FC253UA-T / KX-FC258RU-T Service Manual ▷ View online
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Other NG example while the power is ON and the LCD displays the following.
Note:
Refer to Translation Lists (P.11) for display.
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12.5.5.2. NG Example
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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
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12.5.6.2. Defective fax NCU section
1. No Speakerphone and no monitor reception
Perform a signal test in the FAX NCU section and locate a defective point (where the signal disappears) on each route between
the microphone and the telephone line (sending), or between the telephone line and the speaker (receiving). Check the compo-
nents at that point. Check Sheet for Signal Route (P.129) is useful for this investigation.
the microphone and the telephone line (sending), or between the telephone line and the speaker (receiving). Check the compo-
nents at that point. Check Sheet for Signal Route (P.129) is useful for this investigation.
2. No pulse dialing
3. No ring tone (or No bell)
REFERENCE:
Check Sheet for Signal Route (P.129)
NCU Section (P.40)
NCU Section (P.40)
4. No tone dialing
REFERENCE:
Check Sheet for Signal Route (P.129)