V
- 33
WSW20
(Overseas communications mode setting)
Selector
No.
Function
Setting and Specifications
1
EP* tone prefix
0:
OFF
1:
ON
2
Overseas communications mode
(Reception)
0:
2100 Hz
1:
1100 Hz
3
Overseas communications mode
(Transmission)
0:
OFF
1:
Ignores DIS once.
4
5
Min. time length from reception of
CFR to start of transmission of
video signals
No.
4
5
0
0 :
100 ms
0
1 :
200 ms
1
0 :
300 ms
1
1 :
400 ms
6
7
Chattering noise elimination at
detection of CNG
No.
6
7
0
0 :
Yes (When CNG goes either
ON or OFF)
0
1 :
Yes
(Only when CNG goes OFF)
1
0 :
No
1
1 :
No
8
CNG detection on/off
0:
OFF
1:
ON
* EP: Echo protection
l
Selector 1:
EP tone prefix
Setting this selector to "1" makes the machine transmit a 1700 Hz echo protection (EP) tone
immediately preceding training in V.29 modulation system to prevent omission of training signals.
Prefixing an EP tone is effective when the machine fails to transmit at the V.29 modem speed and
always has to fall back to 4800 bps transmission.
l
Selectors 2 and 3: Overseas communications mode
These selectors should be used if the machine malfunctions in overseas communications.
According to the communications error state, select the signal specifications.
Setting selector 2 to "1" allows the machine to use 1100 Hz CED signal instead of 2100 Hz in
receiving operation. This prevents malfunctions resulting from echoes, since the 1100 Hz signal
does not disable the echo suppressor (ES) while the 2100 Hz signal does.
Setting selector 3 to "1" allows the machine to ignore a DIS signal sent from the called station
once in sending operation. This operation suppresses echoes since the first DIS signal
immediately follows a 2100 Hz CED (which disables the ES) so that it is likely to be affected by
echoes in the disabled ES state. However, such a disabled ES state will be removed soon so that
the second and the following DIS signals are not susceptible to data distortion due to echoes.
Note that some models when called may cause error by receiving a self-outputted DIS.
l
Selectors 8: CNG detection on/off
If this selector is set to "1," the machine detects a CNG signal according to the condition preset by
selectors 2 and 3 of WSW18 after a line is connected. If it is set to "0," the machine detects a
CNG signal as long as the line is connected.
Summary of Contents for 1920CN - Color Inkjet - Fax
Page 1: ...MULTI FUNCTION CENTER SERVICE MANUAL MODEL MFC9600 MFC9850 MFC9870 DCP1200 MFC9750 ...
Page 5: ...CHAPTER I GENERAL DESCRIPTION ...
Page 26: ...CHAPTER II INSTALLATION ...
Page 27: ...CHAPTER II INSTALLATION CONTENTS 1 INSTALLING THE UPDATE DATA TO THE MACHINE II 1 ...
Page 30: ...CHAPTER III THEORY OF OPERATION ...
Page 32: ...III 1 1 OVERVIEW Provided on models supporting facsimile function ...
Page 36: ...III 5 2 2 Laser Printing Mechanism 2 2 1 Paper pick up and registration mechanism ...
Page 42: ...III 11 Location of Sensors and Actuators ...
Page 44: ...CHAPTER IV DISASSEMBLY REASSEMBLY AND LUBRICATION ...
Page 49: ...IV 3 n n Disassembly Order Flow ...
Page 96: ...IV 50 Setting up the main PCB after replacement ...
Page 106: ...IV 60 ...
Page 108: ...IV 62 2 Scanner mount ...
Page 109: ...IV 63 3 Drive gear ASSY ...
Page 110: ...IV 64 4 Paper cassette ...
Page 111: ...CHAPTER V MAINTENANCE MODE ...
Page 118: ...V 6 Scanning Compensation Data List ...
Page 167: ...V 55 MFC9600 DCP1200 MFC9850 9870 MFC9750 Key Button Entry Order ...
Page 172: ...CHAPTER VI ERROR INDICATION AND TROUBLESHOOTING ...
Page 200: ...VI 27 Location of High voltage Contacts and Grounding Contacts ...
Page 201: ...VI 28 ...
Page 202: ...MFC9600 DCP1200 MFC9750 MFC9850 MFC9870 Appendix 1 EEPROM Customizing Codes ...
Page 206: ...A Main PCB 1 7 ...
Page 207: ...A Main PCB 2 7 ...
Page 208: ...A Main PCB 3 7 ...
Page 209: ...A Main PCB 4 7 ...
Page 210: ...A Main PCB 5 7 ...
Page 211: ...A Main PCB 6 7 ...
Page 212: ...A Main PCB 7 7 ...
Page 213: ...B Engine PCB ...
Page 214: ...C NCU PCB U S A Canada ...
Page 217: ...C NCU PCB Asia ...
Page 218: ...D Control Panel PCB MFC9600 MFC9850 MFC9870 ...
Page 219: ...D Control Panel PCB 1 2 DCP1200 MFC9750 ...
Page 220: ...D Control Panel PCB 2 2 DCP1200 MFC9750 ...
Page 221: ...E Relay PCB ...
Page 222: ...F Power Supply PCB 100 120V Low voltage power supply ...
Page 223: ...F Power Supply PCB 200 240V Low voltage power supply ...
Page 224: ...F Power Supply PCB High voltage power supply ...
Page 225: ...Jan 00 SM8C5401 Printed in Japan ...
Page 229: ......
Page 231: ......
Page 233: ......
Page 235: ......
Page 237: ......
Page 239: ......
Page 241: ......
Page 243: ......
Page 245: ......
Page 247: ......
Page 249: ......
Page 251: ......
Page 256: ...PL8C5433 Ver D ...
Page 260: ......
Page 262: ......
Page 264: ......
Page 266: ......
Page 268: ......
Page 270: ......
Page 272: ......
Page 274: ......
Page 276: ......
Page 278: ......
Page 280: ......
Page 282: ......
Page 286: ...PL8C5405 Ver K ...