Panasonic KX-FT74RU-B Service Manual ▷ View online
(Example)
Bit No.
DIS/DTC
DCS
1
Transmitter - T.2 operation
2
Receiver - T.2 operation
Receiver - T.2 operation
3
T.2 IOC = 176
T.2 IOC = 176
4
Transmitter - T.3 operation
5
Receiver - T.3 operation
Receiver - T.3 operation
6
Reserved for future T.3 operation features.
7
Reserved for future T.3 operation features.
8
Reserved for future T.3 operation features.
9
Transmitter - T.4 operation
10
Receiver - T.4 operation
Receiver - T.4 operation
11, 12
(0, 0)
(0, 1)
(1, 0)
(1, 1)
(0, 1)
(1, 0)
(1, 1)
Data signaling rate
V.27 ter fall back mode
V.27 ter
V.29
V.27 ter and V.29
V.27 ter fall back mode
V.27 ter
V.29
V.27 ter and V.29
Data signaling rate
2400 bit/s, V.27 ter
4800 bit/s, V.27 ter
9600 bit/s, V.29
7200 bit/s, V.29
2400 bit/s, V.27 ter
4800 bit/s, V.27 ter
9600 bit/s, V.29
7200 bit/s, V.29
13
Reserved for the new modulation system.
14
Reserved for the new modulation system.
15
Vertical resolution = 7.7 line/mm
Vertical resolution = 7.7 line/mm
16
Two-dimensional coding capability
Two-dimensional coding
17, 18
(0, 0)
(0, 1)
(1, 0)
(1, 1)
Recording width capabilities
1728 picture elements along scan line length of
215 mm ± 1%
1728 picture elements along scan line length of
215 mm ± 1% and
2048 picture elements along scan line length of
255 mm ± 1% and
2432 picture elements along scan line length of
303 mm ± 1%
1728 picture elements along scan line length of
215 mm ± 1% and
2048 picture elements along scan line length of
255 mm ± 1%
Invalid
1728 picture elements along scan line length of
215 mm ± 1%
1728 picture elements along scan line length of
215 mm ± 1% and
2048 picture elements along scan line length of
255 mm ± 1% and
2432 picture elements along scan line length of
303 mm ± 1%
1728 picture elements along scan line length of
215 mm ± 1% and
2048 picture elements along scan line length of
255 mm ± 1%
Invalid
Recording width
1728 picture elements along scan line length of
215 mm ± 1%
2432 picture elements along scan line length of
303 mm ± 1%
1728 picture elements along scan line length of
215 mm ± 1%
2432 picture elements along scan line length of
303 mm ± 1%
2048 picture elements along scan line length of
255 mm ± 1%
255 mm ± 1%
Invalid
19, 20
(0, 0)
(0, 1)
(1, 0)
(1, 1)
(0, 1)
(1, 0)
(1, 1)
Maximum recording length capability
A4 (297 mm)
Unlimited
A4 (297 mm) and B4 (364 mm)
Invalid
A4 (297 mm)
Unlimited
A4 (297 mm) and B4 (364 mm)
Invalid
Maximum recording length
A4 (297 mm)
Unlimited
B4 (364 mm)
Invalid
A4 (297 mm)
Unlimited
B4 (364 mm)
Invalid
Signal.....DCS (Digital Command Signal)
Identification Signal Format.....X1000001
Identification Signal Format.....X1000001
Function:
Notifies the capacity of the receiving machine obtained at DIS and announces the transmission mode of the sender. The added
data signals are as follows.
Notifies the capacity of the receiving machine obtained at DIS and announces the transmission mode of the sender. The added
data signals are as follows.
(Example)
Bit No.
DIS/DTC
Standard setting
DCS
21, 22, 23
(0, 0, 0)
(0, 0, 1)
(0, 1, 0)
(1, 0, 0)
(0, 1, 1)
(1, 1, 0)
(1, 0, 1)
(1, 1, 1)
(0, 0, 1)
(0, 1, 0)
(1, 0, 0)
(0, 1, 1)
(1, 1, 0)
(1, 0, 1)
(1, 1, 1)
Minimum scan line time capability of the receiver
20 ms at 3.85 l/mm: T7.7 = T3.85
40 ms at 3.85 l/mm: T7.7 = T3.85
10 ms at 3.85 l/mm: T7.7 = T3.85
5 ms at 3.85 l/mm: T7.7 = T3.85
10 ms at 3.85 l/mm: T7.7 = 1/2 T3.85
20 ms at 3.85 l/mm: T7.7 = 1/2 T3.85
40 ms at 3.85 l/mm: T7.7 = 1/2 T3.85
0 ms at 3.85 l/mm: T7.7 = T3.85
20 ms at 3.85 l/mm: T7.7 = T3.85
40 ms at 3.85 l/mm: T7.7 = T3.85
10 ms at 3.85 l/mm: T7.7 = T3.85
5 ms at 3.85 l/mm: T7.7 = T3.85
10 ms at 3.85 l/mm: T7.7 = 1/2 T3.85
20 ms at 3.85 l/mm: T7.7 = 1/2 T3.85
40 ms at 3.85 l/mm: T7.7 = 1/2 T3.85
0 ms at 3.85 l/mm: T7.7 = T3.85
Minimum scan line time
20 ms
40 ms
10 ms
5 ms
20 ms
40 ms
10 ms
5 ms
0 ms
24
Extend field
1
Extend field
25
2400 bit/s handshaking
0
2400 bit/s handshaking
26
Uncompressed mode
0
Uncompressed mode
27
Error correction mode
0
Error correction mode
28
Set to "0".
0
Frame size 0 = 256 octets 1 = 64 octets
29
Error limiting mode
0
Error limiting mode
30
Reserved for G4 capability on PSTN
0
Reserved for G4 capability on PSTN
31
Unassigned
0
32
Extend field
1
Extend field
33
(0)
(1)
(1)
Validity of bits 17, 18
Bits 17, 18 are valid
Bits 17, 18 are invalid
Bits 17, 18 are valid
Bits 17, 18 are invalid
0
Recording width
Recording width indicated by bits 17, 18
Recording width indicated by this field bit
information
Recording width indicated by bits 17, 18
Recording width indicated by this field bit
information
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KX-FT74RU-B
Bit No.
DIS/DTC
Standard setting
DCS
34
Recording width capability 1216 picture elements along
scan line length of 151 ± mm 1%
scan line length of 151 ± mm 1%
0
Middle 1216 elements of 1728 picture elements
35
Recording width capability 864 picture elements along
scan line length of 107 ± mm 1%
scan line length of 107 ± mm 1%
0
Middle 864 elements of 1728 picture elements
36
Recording width capability 1728 picture elements along
scan line length of 151 ± mm 1%
scan line length of 151 ± mm 1%
0
Invalid
37
Recording width capability 1728 picture elements along
scan line length of 107 ± mm 1%
scan line length of 107 ± mm 1%
0
Invalid
38
Reserved for future recording width capabilities.
0
39
Reserved for future recording width capabilities.
0
40
Extend field
1
Extend field
41
Semi super time / mm
1
42
Semi super time / mm
0
43
Super time
0
44
Inch
0
45
mm
1
46
MSC/SF
0
47
Select Polling
0
48
EXT
0
Note 1 - Standard facsimile units conforming to T.2 must have the following capability: Index of cooperation (IOC)=264.
Note 2 - Standard facsimile units conforming to T.3 must have the following capability: Index of cooperation (IOC)=264.
Note 3 - Standard facsimile units conforming to T.4 must have the following capability: Paper length=297 mm.
Signal
Identification Signal Format
Function
Training 1
———————
A fixed pattern is transmitted to the receiving side at a speed
(2400 to 9600 bps) designated by DCS, and the receiving side
optimizes the automatic equalizer, etc., according to this signal.
(2400 to 9600 bps) designated by DCS, and the receiving side
optimizes the automatic equalizer, etc., according to this signal.
TCF
(Training Check)
(Training Check)
———————
Sends 0 continuously for 1.5 seconds at the same speed as the
training signal.
training signal.
CFR
(Confirmation to Receive)
(Confirmation to Receive)
X0100001
Notifies the sending side that TCF has been properly received. If
TCF is not properly received, FTT (Failure To Train) X0100010 is
relayed to the sender. The sender then reduces the transmission
speed by one stage and initiates training once again.
TCF is not properly received, FTT (Failure To Train) X0100010 is
relayed to the sender. The sender then reduces the transmission
speed by one stage and initiates training once again.
Training 2
———————
Used for reconfirming the receiving side like training 1.
Image Signal
Refer to the next page.
———————
RTC
(Return to Control)
(Return to Control)
———————
Sends 12 bits (0...01 × 6 times) to the receiver at the same speed
as the image signal and notifies completion of transmission of the
first sheet.
as the image signal and notifies completion of transmission of the
first sheet.
EOP
(End of Procedure)
(End of Procedure)
X1110100
End of one communication
MCF
(Message Confirmation)
(Message Confirmation)
X0110001
End of 1 page reception
DCN
(Disconnect)
(Disconnect)
X1011111
Phase E starts.
MPS
(Multi-Page Signal)
(Multi-Page Signal)
X1110010
Completion of transmission of 1 page. If there are still more
documents to be sent, they are output instead of EOP. After MCF
reception, the sender transmits an image signal of the second
sheet.
documents to be sent, they are output instead of EOP. After MCF
reception, the sender transmits an image signal of the second
sheet.
PRI-EOP
(Procedural Interrupt-EOP)
(Procedural Interrupt-EOP)
X1111100
If there is an operator call from the sender, it is output after RTC.
PIP
(Procedural Interrupt Positive)
(Procedural Interrupt Positive)
X0110101
This is output when an operator call is received.
126
KX-FT74RU-B
b. Redundancy Compression Process Coding Mode
This unit uses one-dimensional MH format.
This unit uses one-dimensional MH format.
127
KX-FT74RU-B
5.6.2. MODEM CIRCUIT OPERATION
The modem (IC5) has all the hardware satisfying the ITU-T standards mentioned previously.
When the ASIC IC1 (61) is brought to a low level, the modem (IC5) is chip-selected and the resistors inside IC are selected by the
select signals from ASIC (IC1) ADR0-ADR4. The commands are written through the data bus, and all the processing is controlled
by the ASIC (IC1) according to ITU-T procedures. The INT signal dispatched from IRQ1, 2 (pins 108 and 121 of IC5) to ASIC (IC1)
when the transmission data is accepted and the received data is demodulated, the ASIC (IC1) implements post processing. This
modem (IC5) has an automatic application equalizer.
select signals from ASIC (IC1) ADR0-ADR4. The commands are written through the data bus, and all the processing is controlled
by the ASIC (IC1) according to ITU-T procedures. The INT signal dispatched from IRQ1, 2 (pins 108 and 121 of IC5) to ASIC (IC1)
when the transmission data is accepted and the received data is demodulated, the ASIC (IC1) implements post processing. This
modem (IC5) has an automatic application equalizer.
With training signal 1 or 2 during G3 reception, it can automatically establish the optimum equalizer. The modem (IC5) operates
using the 32.256 MHz clock (X3).
using the 32.256 MHz clock (X3).
1. Facsimile Transmission
The digital image data on the data bus is modulated in the modem (IC5), and sent from pin 69 via analog SW (IC9) and
amplifier IC10 and the NCU section to the telephone line.
amplifier IC10 and the NCU section to the telephone line.
Refer to CHECK SHEET (P.65)
2. Facsimile Reception
The analog image data which is received from the telephone line passes through the NCU section and enters pin 60 of the
modem (IC5). The signals that enter pin 60 of the modem (IC5) are demodulated in the board to digital image signals, then
placed on the data bus.
modem (IC5). The signals that enter pin 60 of the modem (IC5) are demodulated in the board to digital image signals, then
placed on the data bus.
In this case, the image signals from the telephone line are transmitted serially. Hence, they are placed on the bus in 8 bit units.
Here, the internal equalizer circuit reduces the image signals to a long-distance receiving level.
Here, the internal equalizer circuit reduces the image signals to a long-distance receiving level.
This is designed to correct the characteristics of the frequency band centered about 3 kHz and maintain a constant receiving
sensitivity. It can be set in the service mode.
sensitivity. It can be set in the service mode.
Refer to CHECK SHEET (P.65)
3. DTMF Transmission (Monitor tone)
The DTMF signal generated in the modem (IC5) is output from pin 69, and is then sent to the circuit on the same route as used
for facsimile transmission.
for facsimile transmission.
Refer to CHECK SHEET (P.65)
(DTMF Monitor Tone)
Refer to CHECK SHEET (P.65)
4. Busy/Dial Tone Detection
The path is the same as FAX receiving. When it is detected, the carrier detect bit of the resistor in the modem (IC5) becomes
1, and this status is monitored by the ASIC (IC1).
1, and this status is monitored by the ASIC (IC1).
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KX-FT74RU-B
