6.6.2. MODEM CIRCUIT OPERATION
The modem (IC505) has all the hardware satisfying the CCITT standards mentioned previously.
When the ASIC IC501 (77) is brought to a low level, the modem (IC505) is chip-selected and the resistors inside IC are selected
by the select signals from ASIC (IC501) ADR0-ADR4(pin 107~111). Commands are written through the data bus, and all
processing is controlled by the ASIC (IC501) according to CCITT procedures. Here, the INT signal dispatched from IRQ (pin 52 of
IC505) to the ASIC (IC501) implements post processing.
This modem (IC505) has an automatic application equalizer. With training signal 1 or 2 at the time of G3 reception, it can
automatically establish the optimum equalizer. The modem (IC505) clock is supplied by pin 70 of ASIC (IC501).
1. Facsimile Transmission/DTMF Line Send
The digital image data on the data bus is modulated in the modem (IC505), and sent from pin 44 via amplifier IC511 (24
→
25),
and the NCU section to the telephone line.
Refer to 2.3.3.5. Analog Board Section.
2. Facsimile Reception
The analog image data which is received from the telephone line passes through the NCU section and enters pin 45 of the
modem (IC505). The signals that enter pin 45 of the modem (IC505) 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.
This is designed to correct the characteristics of the frequency band centered around 3 kHz and maintain a constant receiving
sensitivity.
It can be set in the service mode.
Refer to 2.3.3.5. Analog Board Section.
3. DTMF Transmission (Monitor tone)
The DTMF signal generated in the modem (IC505) is output from pin 44, and the NCU section to the telephone line the same
as facsimile transmission signals.
(DTMF Monitor Tone)
Refer to 2.3.3.5. Analog Board Section.
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 (IC505) becomes
1, and this status is monitored by ASIC (IC501).
161
KX-FP101
Содержание KX-FP105BX
Страница 36: ...1 11 CCITT No 1 Test Chart Actual size 8 KX FP101 ...
Страница 38: ...1 12 2 CONTROL PANEL 10 KX FP101 ...
Страница 58: ...2 3 3 TROUBLESHOOTING ITEMS TABLE 30 KX FP101 ...
Страница 59: ...2 3 3 1 Simple Check List 31 KX FP101 ...
Страница 61: ...2 Document JAM 33 KX FP101 ...
Страница 63: ...4 Skew We recommend making a copy of the Fig B document in 3 Multiple feed and using it 35 KX FP101 ...
Страница 65: ...6 Paper JAM 7 Multiple feed and skew 37 KX FP101 ...
Страница 68: ...Fig C 12 A blank page is received 40 KX FP101 ...
Страница 72: ...2 3 3 3 1 Defective facsimile section 1 Transmit problem 44 KX FP101 ...
Страница 80: ...52 KX FP101 ...
Страница 81: ...53 KX FP101 ...
Страница 82: ...54 KX FP101 ...
Страница 83: ...55 KX FP101 ...
Страница 84: ...56 KX FP101 ...
Страница 85: ...57 KX FP101 ...
Страница 86: ...58 KX FP101 ...
Страница 87: ...59 KX FP101 ...
Страница 92: ...2 3 3 4 1 Digital Block Diagram 64 KX FP101 ...
Страница 95: ...I O and Pin No Diagram 67 KX FP101 ...
Страница 97: ...69 KX FP101 ...
Страница 98: ...NG Example 70 KX FP101 ...
Страница 99: ...2 3 3 4 2 Check the Status of the Digital Board 71 KX FP101 ...
Страница 101: ...Note Inside the digital board 73 KX FP101 ...
Страница 105: ...2 Troubleshooting Flow Chart 77 KX FP101 ...
Страница 107: ...2 3 3 7 Operation Panel Section 1 No key operation 2 No LCD indication 79 KX FP101 ...
Страница 109: ...5 Check the paper top sensor PS502 PAPER JAMMED 6 Check the film end sensor PS501 FILM EMPTY 81 KX FP101 ...
Страница 110: ...2 3 3 9 CIS Contact Image Sensor Section Refer to 6 4 4 SCANNING BLOCK 82 KX FP101 ...
Страница 111: ...83 KX FP101 ...
Страница 112: ...2 3 3 10 Thermal Head Section Refer to 6 4 3 THERMAL HEAD 84 KX FP101 ...
Страница 117: ...2 4 5 SERVICE MODE SETTINGS Example of a printed out list Note The above values are the default values 89 KX FP101 ...
Страница 125: ...2 4 7 3 PRINTOUT EXAMPLE 97 KX FP101 ...
Страница 126: ...98 KX FP101 ...
Страница 129: ...2 5 3 PRINT TEST PATTERN 1 Platen roller Reference pattern 101 KX FP101 ...
Страница 130: ...2 Left margin Top margin Reference pattern 102 KX FP101 ...
Страница 131: ...3 Thermal head 1 dot Reference pattern 103 KX FP101 ...
Страница 154: ...6 3 2 MEMORY MAP 126 KX FP101 ...
Страница 166: ...138 KX FP101 ...
Страница 176: ...6 4 6 3 2 Transmitting documents 6 4 6 3 3 Receiving FAX 148 KX FP101 ...
Страница 177: ...6 4 6 3 4 Copying 149 KX FP101 ...
Страница 188: ...b Redundancy Compression Process Coding Mode This unit uses one dimensional MH format 160 KX FP101 ...
Страница 212: ...12 1 MEMO KX FP101 184 ...
Страница 214: ...13 1 MEMO KX FP101 186 ...
Страница 216: ...14 1 MEMO KX FP101 188 ...
Страница 218: ...15 1 MEMO KX FP101 190 ...
Страница 220: ...16 1 MEMO KX FP101 192 ...
Страница 221: ...17 TERMINAL GUIDE OF THE IC S TRANSISTORS AND DIODES 193 KX FP101 ...
Страница 222: ...18 FIXTURES AND TOOLS 194 KX FP101 ...
Страница 223: ...19 CABINET MECHANICAL AND ELECTRICAL PARTS LOCATION 19 1 OPERATION PANEL SECTION 195 KX FP101 ...
Страница 224: ...19 2 UPPER CABINET SECTION 196 KX FP101 ...
Страница 225: ...19 2 1 PICK UP BASE SECTION 197 KX FP101 ...
Страница 226: ...19 3 LOWER P C B SECTION 198 KX FP101 ...
Страница 227: ...19 4 MOTOR SECTION 199 KX FP101 ...
Страница 228: ...19 5 ACTUAL SIZE OF SCREWS AND WASHER 200 KX FP101 ...
Страница 229: ...20 ACCESSORIES AND PACKING MATERIALS 201 KX FP101 ...
Страница 238: ...210 KX FP101 D Q KXFP101 Printed in Japan ...