No. Countermeasure
Side
Echo Communication Problem
Example
Countermeasure
Service
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.
Add a dummy signal to the
beginning of the training
signal.
Service code
(International
select)
This countermeasure
becomes the
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)
Change to a 1100Hz CED
signal frequency. (Refer to
Fig. b)
Service code
(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)
Service code
(Time between
and 300
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)
Service code
(Overseas
detection
3
Sending side
Communication failure occurs
in a long 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)
Decrease the transmission
level from -10 dBm to -15
dBm and the echo level will
decrease.
Service code
(Transmit
4
Sending side
Receiving side
Decrease the receiving
sensitivity from -13 dBm to
about -32 dBm so an echo
signal will not received.
Service code
(Receiving sensitivity)
5
Sending 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.
Service code
(T4 timer)
Fig. a (Overlapping the Echo of the DIS signal and DCS signal)
109
Summary of Contents for KX-FHD332C
Page 33: ...3 Open the back cover 4 Remove the jammed recording paper 33 ...
Page 46: ...5 1 DISASSEMBLY FLOW CHART 5 1 1 UPPER CABINET SECTION 46 ...
Page 49: ...5 2 2 HOW TO REMOVE THE OPERATION PANEL BLOCK 49 ...
Page 50: ...5 2 3 HOW TO REMOVE THE OPERATION BOARD AND LCD 50 ...
Page 51: ...5 2 4 HOW TO REMOVE THE IMAGE SENSOR CIS 51 ...
Page 52: ...5 2 5 HOW TO REMOVE THE THERMAL HEAD 52 ...
Page 53: ...5 2 6 HOW TO REMOVE THE PLATEN ROLLER AND BACK COVER 53 ...
Page 54: ...5 2 7 HOW TO REMOVE THE PICKUP ROLLER 54 ...
Page 55: ...5 2 8 HOW TO REMOVE THE CASSETTE LEVER 55 ...
Page 56: ...5 2 9 HOW TO REMOVE THE BOTTOM FRAME 56 ...
Page 57: ...5 2 10 HOW TO REMOVE THE DIGITAL ANALOG POWER SUPPLY SENSOR BOARDS AND AC INLET 57 ...
Page 58: ...5 2 11 HOW TO REMOVE THE MOTOR BLOCK AND SEPARATION ROLLER 58 ...
Page 59: ...5 2 12 HOW TO REMOVE THE GEARS OF MOTOR BLOCK 59 ...
Page 60: ...5 3 INSTALLATION POSITION OF THE LEAD WIRES 60 ...
Page 74: ...2 Left margin Top margin 3 Thermal head 1 dot 74 ...
Page 77: ...CROSS REFERENCE PROGRAM MODE TABLE 6 4 2 PROGRAM MODE TABLE 77 ...
Page 81: ...Note The above values are the default values 6 5 3 HISTORY 81 ...
Page 90: ...Fig B 90 ...
Page 98: ...6 6 4 12 A BLANK PAGE IS RECEIVED 98 ...
Page 116: ...116 ...
Page 117: ...CROSS REFERENCE TEST FUNCTIONS 117 ...
Page 118: ...CROSS REFERENCE TEST FUNCTIONS 118 ...
Page 119: ...CROSS REFERENCE TEST FUNCTIONS 119 ...
Page 120: ...CROSS REFERENCE TEST FUNCTIONS 120 ...
Page 121: ...121 ...
Page 122: ...122 ...
Page 123: ...123 ...
Page 128: ...128 ...
Page 133: ...I O and Pin No Diagram 6 6 7 1 CHECK THE STATUS OF THE DIGITAL BOARD 133 ...
Page 139: ...3 No ring tone or No bell CROSS REFERENCE CHECK SHEET 139 ...
Page 142: ...6 6 9 2 TROUBLESHOOTING FLOW CHART 142 ...
Page 143: ...143 ...
Page 144: ...144 ...
Page 148: ...CROSS REFERENCE TEST FUNCTIONS 6 6 13 THERMAL HEAD SECTION Refer to THERMAL HEAD 148 ...
Page 149: ...7 CIRCUIT OPERATIONS 7 1 CONNECTION DIAGRAM 149 ...
Page 152: ...7 3 CONTROL SECTION 7 3 1 BLOCK DIAGRAM 7 3 2 MEMORY MAP 152 ...
Page 153: ...7 3 3 ASIC IC501 This custom IC is used for the general FAX operations 153 ...
Page 155: ...155 ...
Page 188: ...7 10 ITS Integrated Telephone System AND MONITOR SECTION 7 10 1 GENERAL 188 ...
Page 200: ...8 3 1 ITU T No 1 TEST CHART 8 3 2 ITU T No 2 TEST CHART 200 ...
Page 201: ...9 FIXTURES AND TOOLS 201 ...
Page 202: ...10 CABINET MECHANICAL AND ELECTRICAL PARTS LOCATION 10 1 GENERAL SECTION 202 ...
Page 203: ...10 2 OPERATION PANEL SECTION 203 ...
Page 204: ...10 3 BACK COVER SECTION 204 ...
Page 205: ...205 ...
Page 206: ...10 4 UPPER CABINET SECTION 206 ...
Page 207: ...10 5 LOWER CABINET P C BOARD SECTION 207 ...
Page 208: ...CROSS REFERENCE MOTOR SECTION 10 6 MOTOR SECTION 208 ...
Page 209: ...10 7 ACTUAL SIZE OF SCREWS 11 ACCESSORIES AND PACKING MATERIALS 209 ...
Page 210: ...12 REPLACEMENT PARTS LIST Notes 1 RTL Retention Time Limited Note 210 ...
Page 231: ...SW502 SW501 CN501 CHECK PFUP1301ZA 1 3 KX FHD332C SENSOR BOARD PCB5 ...