Panasonic KX-FL423RU Service Manual ▷ View online
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12.2.9. Power Supply Board Section
12.2.9.1. Key Components for Troubleshooting
Check the following parts first: F2, C5, and Q1.
This comes from our experience with experimental tests. For example: power supply and lightning surge voltage test, withstanding
voltage test, intentional short circuit test, etc.
Caution:
This comes from our experience with experimental tests. For example: power supply and lightning surge voltage test, withstanding
voltage test, intentional short circuit test, etc.
Caution:
If you find a melted fuse in the unit, do not turn on the power until you locate and repair the faulty parts (except for the fuse);
otherwise the fuse will melt again and you cannot pinpoint the faulty point.
otherwise the fuse will melt again and you cannot pinpoint the faulty point.
In most cases, the symptom is that nothing is output. It is more likely that the fault is in the primary side rather than the secondary
side. Check the primary side first.
side. Check the primary side first.
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12.2.9.2. Troubleshooting Flow Chart
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12.3. Remote Programming
If, after the call is connected, the customer describes the situation and it is determined that the problem can be corrected by
making parameter changes, this function makes it possible to change parameters such as the user code and service code from
another fax (using DTMF tones). Therefore, travel to the customer's location is not required. However, it is not possible to
change all the parameters remotely (Program Mode Table(P.129)). The function used to accomplish this is remote program-
ming.
making parameter changes, this function makes it possible to change parameters such as the user code and service code from
another fax (using DTMF tones). Therefore, travel to the customer's location is not required. However, it is not possible to
change all the parameters remotely (Program Mode Table(P.129)). The function used to accomplish this is remote program-
ming.
First, in order to check the current status of the service code parameter, print out the setup list (code: 991) and the service list
(code: 999) from the customer's fax machine.
Based on this, the parameters for the desired codes can be changed.
The procedure for changing and listing parameters is described on Entering the Remote Programming Mode and Changing
Service Codes(P.128). Also, before exiting the remote programming mode, it is advisable to obtain a new list to confirm that the
changes were made correctly.
(code: 999) from the customer's fax machine.
Based on this, the parameters for the desired codes can be changed.
The procedure for changing and listing parameters is described on Entering the Remote Programming Mode and Changing
Service Codes(P.128). Also, before exiting the remote programming mode, it is advisable to obtain a new list to confirm that the
changes were made correctly.
Hint:
Since the connected telephone is in use during the remote programming mode, it may be helpful to ask the customer to switch
to the speakerphone. This frees the customer from the need to remain right next to the fax while you are making parameter set-
tings. When finished, inform the customer. Also note that in very noisy locations where the DTMF tones are not audible, the
remote programming function will not work.
to the speakerphone. This frees the customer from the need to remain right next to the fax while you are making parameter set-
tings. When finished, inform the customer. Also note that in very noisy locations where the DTMF tones are not audible, the
remote programming function will not work.
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12.3.1. Entering the Remote Programming Mode and Changing Service Codes
CROSS REFERENCE:
Program Mode Table (P.129)
