Panasonic KX-FP158RU-B / KX-FP158RU-W Service Manual ▷ View online
2.3.5.1.2. SOMETIME THERE IS A TRANSMIT PROBLEM
Note:
"596: Transmit level set" represents a service code. (Refer to SERVICE FUNCTION TABLE(P.93).)
CROSS REFERENCE:
LCD TRANSLATION LIST (P.3)
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KX-FP158RU-B / KX-FP158RU-W
2.3.5.1.3. RECEIVE PROBLEM
First confirm whether the recording paper is installed properly or not before starting troubleshooting. (Refer to "Remarks".)
Note:
"596: Transmit level set" represents a service code. (Refer to SERVICE FUNCTION TABLE(P.93).)
Remarks:
Regarding the reception problem, we have investigated the conceivable causes in the flow chart except for the software-related
errors. However, some troubles may occur due to the software-related problems such as "OUT OF PAPER" when the fax
switches to the memory receiving mode and the memory capacity becomes full of the unprintable data. In this case, error
messages [MEMORY FULL] and its main cause, for example "CHECK PAPER" are displayed on the LCD. Once you solve the
main problem, [MEMORY FULL] will be cancelled and the reception problem will be resolved.
errors. However, some troubles may occur due to the software-related problems such as "OUT OF PAPER" when the fax
switches to the memory receiving mode and the memory capacity becomes full of the unprintable data. In this case, error
messages [MEMORY FULL] and its main cause, for example "CHECK PAPER" are displayed on the LCD. Once you solve the
main problem, [MEMORY FULL] will be cancelled and the reception problem will be resolved.
LCD display messages indicating the error causes are shown below.
Refer to LCD TRANSLATION LIST (P.3).
CHECK PAPER
COVER OPEN
UNIT OVERHEATED (COVER OPEN, etc.)...Reset the unit.
PAPER JAMMED
CHECK FILM
Please refer to USER RECOVERABLE ERRORS (P.28) for the above items. If it turns out to be a hardware deformity, please
check each sensor. (Refer to TEST FUNCTIONS (P.104).)
check each sensor. (Refer to TEST FUNCTIONS (P.104).)
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KX-FP158RU-B / KX-FP158RU-W
2.3.5.1.4. THE UNIT CAN COPY, BUT CANNOT TRANSMIT/RECEIVE
CROSS REFERENCE:
ANALOG BOARD SECTION(P.78)
TEST FUNCTIONS(P.104)
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KX-FP158RU-B / KX-FP158RU-W
2.3.5.1.5. THE UNIT CAN COPY, BUT CANNOT EITHER TRANSMIT/RECEIVE LONG
DISTANCE OR INTERNATIONL COMMUNICATIONS
The following two causes can be considered for this symptom.
Cause 1:
The other party is executing automatic dialing, the call has been received by this unit, and the CED or DIS signal response time
is too long. (In most cases, this unit detects the CNG signal and can respond to CED or DIS.) (According to the ITU-T standard,
the communication procedure is cancelled when there is no response from the other party within 35 sec, so that the other party
releases the line.)
is too long. (In most cases, this unit detects the CNG signal and can respond to CED or DIS.) (According to the ITU-T standard,
the communication procedure is cancelled when there is no response from the other party within 35 sec, so that the other party
releases the line.)
(Cause and Countermeasure)
As shown in the chart above, the total handshaking time must be reduced, but because of the long distance connection and
linking of several stations, the line connection time cannot be reduced. Accordingly, the following countermeasures should be
tried.
linking of several stations, the line connection time cannot be reduced. Accordingly, the following countermeasures should be
tried.
(A)... As the 35 sec. count is started directly after dialing or directly after the START button has been pressed for models with
a START button, the other party should be called manually, if possible. Another possibility is entering two pauses at the end of
the auto dial number on the transmission side. Then the count start time can be delayed for 2 pauses (about 10 sec.).
a START button, the other party should be called manually, if possible. Another possibility is entering two pauses at the end of
the auto dial number on the transmission side. Then the count start time can be delayed for 2 pauses (about 10 sec.).
Cause 2:
Erroneous detection because of an echo or an echo canceler.
(Echo/Echo Canceler)
The signal from FAX1 reaches FAX2 via stations 1 and 2, but the reflection signal at station 2 also returns via station 1 (echo).
As the distance between station 1 and station 2 is far, the echo returns to FAX 1 at a max of 600 msec after transmission. There
is a possibility that this signal is detected erroneously as the signal from FAX2. For a normal call, there is also a possibility that
the echo of their own voice will make the call difficult to understand. For this reason, each station (station 1 and station 2)
attaches echo cancelers (S1 and S2) for international lines or long distance lines. For the echo canceler, the level of the
transmission signal from FAX 1 is compared with the level of the reception signal from FAX2. When the transmission signal is
larger, S1 is closed while S2 is opened when it is smaller. In other words, for transmission from FAX1, S1 is closed and S2 is
open, so that the echo does not return to FAX1.
As the distance between station 1 and station 2 is far, the echo returns to FAX 1 at a max of 600 msec after transmission. There
is a possibility that this signal is detected erroneously as the signal from FAX2. For a normal call, there is also a possibility that
the echo of their own voice will make the call difficult to understand. For this reason, each station (station 1 and station 2)
attaches echo cancelers (S1 and S2) for international lines or long distance lines. For the echo canceler, the level of the
transmission signal from FAX 1 is compared with the level of the reception signal from FAX2. When the transmission signal is
larger, S1 is closed while S2 is opened when it is smaller. In other words, for transmission from FAX1, S1 is closed and S2 is
open, so that the echo does not return to FAX1.
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KX-FP158RU-B / KX-FP158RU-W
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