Ricoh B230 Service Manual

Bit Switches 
SM 71 B786 
B786 
Fax Option 
destination 
 
Communication Switch 11 – Not used (do not change the settings.) 
 
Communication Switch 12 [SP No. 1-104-019] 
No FUNCTION COMMENTS 
0-7 Memory transmission: Interval 
between dialing attempts to 
the same destination 01 – FF (Hex) minutes 
 
Communication Switch 13 – Not used (do not change the settings.) 
 
Communication Switch 14 [SP No. 1-104-021] 
No FUNCTION COMMENTS 
0 Inch-to-mm conversion during 
transmission 
0: Disabled 1: Enabled 0:...

Bit Switches 
B786 72  SM 
No FUNCTION COMMENTS 
0 Not used  Do not change the factory settings. 
1 Optional G3 unit (G3-2) 
0: Off 
1: On Change this bit to 1 when installing the first 
optional G3 unit (G3-2). 
2 Not used  Do not change the factory settings. 
3 Optional G3 unit (G3-3)  
0: Off 
1: On Change this bit to 1 when installing the second 
optional G3 unit (G3-3). 
4-7 Not used  Do not change the factory settings. 
 
Communication Switch 17 [SP No. 1-104-024] 
No FUNCTION COMMENTS 
0 SEP...

Bit Switches 
SM 73 B786 
B786 
Fax Option 
 
Communication Switch 19 - Not used (do not change the settings) 
Communication Switch 1A - Not used (do not change the settings) 
 
Communication Switch 1B [SP No. 1-104-028] 
No FUNCTION COMMENTS 
0-7 Extension access code (0 to 
7) to turn V.8 protocol On/Off  
0: On 
1: Off 
  If the PABX does not support V.8/V.34 protocol 
procedure, set this bit to “1” to disable V.8. 
Example: If “0” is the PSTN access code, set bit 0 
to 1. When the machine detects “0”...

Bit Switches 
B786 74  SM 
2 Monitor speaker during 
memory transmission 
0: Disabled 1: Enabled 1: The monitor speaker is enabled during memory 
transmission. 
3-5 Not used  Do not change the settings. 
6 G3 mode selection for direct 
line 
0: Off 
1:On  1: G3 communication through the direct line is 
enabled.  
7 Not used  Do not change the settings. 
 
G3 Switch 01 [SP No. 1-105-002] 
No FUNCTION COMMENTS 
0-1 Not used  Do not change the settings. 
2-3 Not used  Do not change the settings. 
4 DIS...

Bit Switches 
SM 75 B786 
B786 
Fax Option 0 DIS detection number  
(Echo countermeasure) 
0: 1  
1: 2 0: The machine will hang up if it receives the 
same DIS frame twice. 
1: Before sending DCS, the machine will wait for 
the second DIS which is caused by echo on the 
line. 
1 Not Used  Do not change the settings. 
2 V.8 protocol 
0: Disabled 
1: Enabled 0: V.8/V.34 communications will not be possible. 
Note: 
Do not set to 0 unless the line condition is always 
bad enough to slow down the data rate to...

Bit Switches 
B786 76  SM 
sender that training has succeeded. 
4-7 Not used  Do not change the settings. 
 
G3 Switch 05 [SP No. 1-105-006] 
No FUNCTION COMMENTS 
Initial Tx modem rate 
Bit 3  Bit 2  Bit 1  Bit 0  bps 
0 0 0 1 2.4k 
0 0 1 0 4.8k 
0 0 1 1 7.2k 
0 1 0 0 9.6k 
0 1 0 1 12.0k 
0 1 1 0 14.4k 
0 1 1 1 16.8k 
1 0 0 0 19.2k 
1 0 0 1 21.6k 
1 0 1 0 24.0k 
1 0 1 1 26.4k 
1 1 0 0 28.8k 
1 1 0 1 31.2k 
1 1 1 0 33.6k 
0-3 
Other settings - Not used These bits set the initial starting modem rate for...

Bit Switches 
SM 77 B786 
B786 
Fax Option 
 
G3 Switch 06 [SP No. 1-105-007] 
No FUNCTION COMMENTS 
Initial Rx modem rate 
Bit 3  Bit 2  Bit 1  Bit 0  bps 
0 0 0 1  2.4k 
0 0 1 0  4.8k 
0 0 1 1  7.2k 
0 1 0 0  9.6k 
0 1 0 1  12.0k 
0 1 1 0  14.4k 
0 1 1 1  16.8k 
1 0 0 0  19.2k 
1 0 0 1  21.6k 
1 0 1 0  24.0k 
1 0 1 1  26.4k 
1 1 0 0  28.8k 
1 1 0 1  31.2k 
1 1 1 0  33.6k 
0-3 
Other settings - Not used ƒ  These bits set the initial starting modem 
rate for reception. 
ƒ  Use a lower setting if high...

Bit Switches 
B786 78  SM 
Other settings - Not used 
 
G3 Switch 07 [SP No. 1-105-008] 
No FUNCTION COMMENTS 
0-1 PSTN cable equalizer 
(tx mode: Internal) 
Bit 1: 0, Bit 0: 0 = None 
Bit 1: 0, Bit 0: 1 = Low 
Bit 1: 1, Bit 0: 0 = Medium 
Bit 1: 1, Bit 0: 1 = High Use a higher setting if there is signal loss at higher 
frequencies because of the length of wire between 
the modem and the telephone exchange. 
Use the dedicated transmission parameters for 
specific receivers. 
Also, try using the cable...

Bit Switches 
SM 79 B786 
B786 
Fax Option 
 
G3 Switch 0A [SP No. 1-105-011] 
No FUNCTION COMMENTS 
0-1 Maximum allowable carrier 
drop during image data 
reception 
Bit 1: 0, Bit 0: 0 = 200 (ms) 
Bit 1: 0, Bit 0: 1 = 400 (ms) 
Bit 1: 1, Bit 0: 0 = 800 (ms) 
Bit 1: 1, Bit 0: 1 = Not used These bits set the acceptable modem carrier drop 
time. 
Try using a longer setting if error code 0-22 is 
frequent. 
2 Select cancellation of high-
speed RX if carrier signal 
lost while receiving 
0: Off 
1: On This...

Bit Switches 
B786 80  SM 
3-second CNG interval.  
High order bit 3000-2250ms: 3000-50xNms 
3000 – 50 x Nms 0F (3000 ms) ≤ N ≤ FF (2250 
ms) 
Low order bit 00-0E(3000-3700ms: 3000+50xNms 
3000 – 50 x Nms 0F (3000 ms) ≤ N ≤ 0F (3700 
ms) 
 
G3 Switch 0F [SP No. 1-105-016] 
No FUNCTION COMMENTS 
0 Alarm when an error occurred 
in Phase C or later 
0: Disabled 
1: Enabled If the customer wants to hear an alarm after each 
error communication, change this bit to “1”. 
1 Alarm when the handset is off-
hook...