Panasonic KX-FP158RU-B / KX-FP158RU-W Service Manual ▷ View online
(Causes and Countermeasures)
Fig. a (Overlapping the Echo of the DIS signal and DCS signal)
Fig. b (Countermeasure by Changing the CED Frequency)
No.
Countermeasure Side
Echo Communication Problem Example
Countermeasure
Service Code
1
Sending side
Some time is needed to compare the level
of the receiving and sending signals for the
echo canceler. The header of the training
signal lacks due to a switching delay to
close S1.
of the receiving and sending signals for the
echo canceler. The header of the training
signal lacks due to a switching delay to
close S1.
Add a dummy signal to the beginning
of the training signal.
of the training signal.
Service code (521)
(International mode select)
This countermeasure
becomes the default value.
2
Receiving side
The
echo
canceler
function
stops
according to a CED signal frequency of
2100Hz (S1 and S2 are both ON), a DIS
signal is returned as an echo, and a DCS
signal from the sending side overlaps the
DIS echo. Then the receiving side FAX
cannot retrieve the DCS signal.
(Refer to Fig. a)
2100Hz (S1 and S2 are both ON), a DIS
signal is returned as an echo, and a DCS
signal from the sending side overlaps the
DIS echo. Then the receiving side FAX
cannot retrieve the DCS signal.
(Refer to Fig. a)
Change to a 1100Hz CED signal
frequency. (Refer to Fig. b)
frequency. (Refer to Fig. b)
Service code (520)
(CED frequency select)
Receiving side
Change the regular rime of 75 msec
between the CED signal and DIS signal
to 500 msec. This will give at least 250
msec to recover the echo canceler
operation. (Refer to Fig. c)
between the CED signal and DIS signal
to 500 msec. This will give at least 250
msec to recover the echo canceler
operation. (Refer to Fig. c)
Service code (593)
(Time between CED and 300
bps)
Sending side
The sending side FAX sends a DCS
signal not after receiving the 1st DIS
signal but after receiving the 2nd DIS
signal. (Refer to Fig. d)
signal not after receiving the 1st DIS
signal but after receiving the 2nd DIS
signal. (Refer to Fig. d)
Service code (594)
(Overseas DIS detection
select)
3
Sending side
Communication failure occurs in a long
distance communication on the telephone
line without an echo canceler.
distance communication on the telephone
line without an echo canceler.
or
There are some cases (e.g. Mobil comms.)
which cause the collision of TX / RX signals
due to the delay / echo and noise of the
network / terminal. (Refer to Fig. e)
which cause the collision of TX / RX signals
due to the delay / echo and noise of the
network / terminal. (Refer to Fig. e)
Decrease the transmission level from -
10 dBm to -15 dBm and the echo level
will decrease.
10 dBm to -15 dBm and the echo level
will decrease.
Service code (596)
(Transmit level set)
4
Sending side
Receiving side
Receiving side
Decrease the receiving sensitivity from
-13 dBm to about -32 dBm so an echo
signal will not received.
-13 dBm to about -32 dBm so an echo
signal will not received.
Service code (598)
(Receiving sensitivity)
5
Sending side
Receiving side
Receiving side
Set additional Pause time (Service
mode: code No. 774) in between the
original and its repeated signals, to
prevent the collision of the signals at
both end.
mode: code No. 774) in between the
original and its repeated signals, to
prevent the collision of the signals at
both end.
Service code (774)
(T4 timer)
53
KX-FP158RU-B / KX-FP158RU-W
Fig. c (Countermeasure by Changing the Interval Between
CED and DIS)
Fig. d (Countermeasure by Ignoring the 1st DIS)
<TX side signal>
<RX side signal>
<Countermeasure>
2nd / 3rd DCS / Training
& delayed CFR / FTT
at TX side
2nd / 3rd EOP / EOM / MPS
& delayed MCF / PIP / PIN / RTP / RTN
at TX side
delayed DCS
& 2nd / 3rd / --- DIS
at RX side
(Fig. e)
2.3.5.1.6. THE UNIT CAN COPY, BUT THE TRANSMISSION AND RECEPTION IMAGE ARE
INCORRECT
(Long distance or international communication operation)
This symptom highly depends on the transmission and reception capability of the other FAX unit and the line conditions.
The countermeasures for this unit are shown below.
Transmission Operation:
Set the transmitting speed to 12000BPS (service mode: code No. 717) or select the overseas mode.
Reception Operation:
If 80% or more of the reception is incorrect, set the receiving speed to 12000BPS. (Service mode: code No. 718)
•
•
Refer to SERVICE FUNCTION TABLE(P.93).
54
KX-FP158RU-B / KX-FP158RU-W
1. Equipment
•
•
1 jig
•
•
1 PC (with LINE IN)
•
•
1 audio cord (mini jack supported)
•
•
2 tel cords
Parts No.
Parts Name &
Description
Qt’y
PQJJ1T004Z
JACK1, JACK2
2
PQJJ1D010Z
PIN JACK
1
ECQE2155KF
or
ECQE2E155KC
or
ECQE2E155KC
CAPACITOR
2
MA4020
DIODE
2
2.3.5.1.7. HOW TO RECORD FAX SIGNAL BY USING PC
Recording FAX signal is one of the useful analysis measures to solve communication problems.
The way of recording easily by using PC is shown as follows.
2. Setting up
FAX SIGNAL RECORDING JIG
3. Connecting PC and JIG
4. PC setting and recording
1. Set LINE IN to be valid in the volume control setting.
Refer to the PC instruction book.
2. Start up the PC software “ SOUND RECORDER”. (This software is bundled to Windows OS, which can create WAV file.)
Set the audio format “ PCM 22.050kHz, 8bit, mono”.
3. Click the record button and start recording after acquisition the signal.
Note:
•
•
Not to be wind wave patterns on the wave monitor.
•
•
Please compress the recording data when you send attaching to E-Mail because the data size will be so heavy.
•
•
Any software which can create WAV files is available.
55
KX-FP158RU-B / KX-FP158RU-W
1. Press the
button 2 times.
2. Press
or
until the “ Journal ” is displayed.
3. Press the
button.
4. The report prints out.
2.3.5.1.8. HOW TO OUTPUT THE JOURNAL REPORT
Error code table:
Refer to ERROR CODE TABLE (P.4).
(1) CODE
(2) RESULT
(3) MODE
SYMPTOM
Counter-
measure*
measure*
A2
PRESSED THE STOP KEY
TX & RX
Communication was interrupted with the STOP button.
A3
DOCUMENT JAMMED
TX
Document paper is jammed.
A4
NO DOCUMENT
TX
No document paper.
A7
THE COVER WAS OPENED
TX & RX
Cover is open.
A9
COMMUNICATION ERROR
TX & RX
DC LOOP detection/Busy Tone detection.
26
COMMUNICATION ERROR
RX
DIS is received after transmission.
40
NO RESPONSE
TX
Transmission is finished when T1 TIMER is expired.
1
41
COMMUNICATION ERROR
TX
DCN is received after DCS transmission.
2
42
COMMUNICATION ERROR
TX
FTT is received after transmission of a 2400BPS
training signal.
training signal.
3
43
COMMUNICATION ERROR
TX
No response after post message is transmitted three
times.
times.
4
44
COMMUNICATION ERROR
TX
RTN and PIN are received.
5
46
COMMUNICATION ERROR
RX
No response after FTT is transmitted.
6
48
COMMUNICATION ERROR
RX
No post message.
7
49
COMMUNICATION ERROR
RX
RTN is transmitted.
8
50
COMMUNICATION ERROR
RX
PIN is transmitted (to PRI-Q).
8
51
COMMUNICATION ERROR
RX
PIN is transmitted.
8
52
NO RESPONSE
RX
Reception is finished when the T1 TIMER expired.
9
53
COMMUNICATION ERROR
TX
DCN is received after transmission of NSC and DTC.
10
54
COMMUNICATION ERROR
RX
DCN is received after DIS transmission.
11
57
COMMUNICATION ERROR
TX
300BPS error.
12
58
COMMUNICATION ERROR
RX
DCN is received after FTT transmission.
13
59
COMMUNICATION ERROR
TX
DCN responds to post message.
14
59
COMMUNICATION ERROR
TX
DCN responds to post message.
14
64
COMMUNICATION ERROR
TX
Polling is not possible.
15
65
COMMUNICATION ERROR
TX
68
COMMUNICATION ERROR
RX
No response at the other party after MCF or CFR is
transmitted.
transmitted.
13
70
COMMUNICATION ERROR
RX
DCN is received after CFR transmission.
13
72
COMMUNICATION ERROR
RX
Carrier is cut when image signal is received.
16
73
COMMUNICATION ERROR
TX & RX
300BPS error.
74
JUNKMAIL PROH. REJECT
RX
Junk Mail Prohibitory ID ???
75
MEMORY FULL
RX
The document was not received due to memory full.
79
CANCELED
TX
The multistation transmission is rejected by user.
FF
COMMUNICATION ERROR
TX & RX
Modem error.
12
TX=TRANSMISSION RX=RECEPTION
Most fax communication problems can be resolved by the following steps.
1. Change the transmit level. (Service code: 596, refer to SERVICE FUNCTION TABLE(P.93).)
2. Change the TX speed/RX speed. (Service code: 717/718, refer to SERVICE FUNCTION TABLE (P.93).)
Note*:
If the problem remains, see the following "Countermeasure" flow chart.
56
KX-FP158RU-B / KX-FP158RU-W
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