Ricoh B230 Service Manual

Bit Switches 
SM 81 B786 
B786 
Fax Option 
memory transmission 
0: Disabled 1: Enabled transmission. 
3-6 Not used  Do not change the settings. 
 
G3-2 Switch 01 [SP No. 1-106-002] 
No FUNCTION COMMENTS 
0-3 Not used  Do not change the settings. 
4 DIS frame length 
0: 10 bytes, 1: 4 bytes 1: The bytes in the DIS frame after the 4th byte 
will not be transmitted (set to 1 if there are 
communication problems with PC-based faxes 
which cannot receive the extended DIS frames). 
5 Not used  Do not change...

Bit Switches 
B786 82  SM 
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.  
ƒ  Do not set to 0 unless the line condition is 
always bad enough to slow down the 
data rate to 14.4 kbps or...

Bit Switches 
SM 83 B786 
B786 
Fax Option 
 
G3-2 Switch 05 [SP No. 1-106-006] 
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 
transmission. 
Use the dedicated transmission parameters if...

Bit Switches 
B786 84  SM 
G3-2 Switch 06 [SP No. 1-106-007] 
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 speeds pose...

Bit Switches 
SM 85 B786 
B786 
Fax Option 
 
G3-2 Switch 07 [SP No. 1-106-008] 
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 equalizer...

Bit Switches 
B786 86  SM 
G3-2 Switch 0A [SP No. 1-106-011] 
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 switch setting...

Bit Switches 
SM 87 B786 
B786 
Fax Option 
4.3.7  IP FAX SWITCHES 
IP Fax Switch 00 [SP No. 1-111-001] 
No. FUNCTION COMMENTS 
0 Not used   Do not change this setting. 
1 IP Fax Transport 
0: TCP, 1: UDP Selects TCP or UDP protocol for IP-Fax 
2 IP Fax single port selection 
0: OFF, 1: ON (enable) Selects single data port. 
3 IP Fax double ports (single data 
port) selection 
0: OFF, 1: ON (enable) Selects whether IP-Fax uses a double port. 
4 IP Fax Gatekeeper  
0: OFF, 1: ON (enable) Enables/disables...

Bit Switches 
B786 88  SM 
4-7  IP Fax preamble wait time setting Selects the preamble wait time. 
[00 to 0f]  
There are 16 values in this 4-bit binary 
switch combination.  
Waiting time: set value level x 100 ms 
Max: 0f (1500 ms) Min: 00 (No wait time) 
The default is 0000 (00H). 
 
IP Fax Switch 02 [SP No. 1-111-003] 
No. FUNCTION COMMENTS 
0 IP Fax bit signal reverse setting 
0: Maker code setting 
1: Internal bit switch setting  When 0 is selected, the bit signal reverse 
method is decided by the...

Bit Switches 
SM 89 B786 
B786 
Fax Option 
IP Fax Switch 03 [SP No. 1-111-004] 
No. FUNCTION COMMENTS 
0 Effective field limitation for G3 
standard function information 
0: OFF, 1: 4byte (DIS) Limits the effective field for standard G3 
function information. 
1 Switching between G3 standard 
and G3 non standard 
0: Enable switching 
1: G3 standard only Enables/disables switching between G3 
standard and G3 non-standard. 
2  Not used.  Do not change this setting. 
3 ECM frame size selection at...

Bit Switches 
B786 90  SM 
Bit 3  Bit 2  Bit 1  Bit 0   
0 0  0 1 2400 bps 
0 0  1 1 4800 bps 
0 0  1 1 7200 bps 
0 1  0 0 9600 bps 
0 1  0 1 12.0 Kbps 
0 1  1 0 14.4 Kbps 
0 1  1 1 16.8 Kbps 
1 0  0 0 19.2 Kbps 
1 0  0 1 21.6 Kbps 
1 0  1 0 24.0 Kbps 
1 0  1 1 26.4 Kbps 
1 1  0 0 28.8 Kbps 
1 1  0 1 31.2 Kbps 
1 1  1 0 33.6 Kbps 
4-5 Modem setting for transmission 
Sets the modem for transmission. 
The default is 00 (V29). 
Bit 5: 0, Bit 4: 0 = V29 
Bit 5: 0, Bit 4: 1 = V17 
Bit 5: 1, Bit 4: 0 = V34*...