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Ricoh B230 Service Manual

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    							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: In immediate transmission, data scanned in 
inch format are transmitted without conversion. 
In memory transmission, data stored in the SAF 
memory in mm format are transmitted without 
conversion. 
Note: When storing the scanned data into SAF 
memory, the fax unit always converts the data into 
mm format. 
1: The machine converts the scanned data or 
stored data in the SAF memory to the format 
which was specified in the set-up protocol 
(DIS/NSF) before transmission. 
1-5 Not used  Do not change the factory settings. 
6-7 Available unit of resolution in 
which fax messages are 
received 
Bit 7: 0, Bit 6: 0 = mm 
Bit 7: 0, Bit 6: 1 = inch 
Bit 7: 1, Bit 6: 0 = mm and 
inch  (default) 
Bit 7: 1, Bit 6: 1 = Not used For the best performance, do not change the 
factory settings. 
The setting determined by these bits is informed 
to the transmitting terminal in the pre-message 
protocol exchange (in the DIS/NSF frames). 
 
Communication Switch 15 – Not used (do not change the settings) 
 
Communication Switch 16 [SP No. 1-104-023]
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    							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 reception 
0: Disabled 
1: Enabled 0: Polling transmission to another maker’s 
machine using the SEP (Selective Polling) signal 
is disabled. 
1 SUB reception 
0: Disabled 
1: Enabled  0: Confidential reception to another maker’s 
machine using the SUB (Sub-address) signal is 
disabled. 
2 PWD reception 
0: Disabled 
1: Enabled 0: Disables features that require PWD (Password) 
signal reception. 
3-6 Not used  Do not change the factory settings. 
7 Action when there is no box 
with an F-code that matches 
the received SUB code 
0: Disconnect the line 
1: Receive the message 
(using normal reception 
mode) Change this setting when the customer requires. 
 
Communication Switch 18 [SP No. 1-104-025] 
No FUNCTION COMMENTS 
0-4 Not used  Do not change the factory settings. 
5 IP-Fax dial-in routing selection
0: Off 
1: On 1: Transfers receiving data to each IP-Fax dial-in 
number.  
IP-Fax dial-in number is 4 digit-number. 
6-7 Not used  Do not change the factory settings.
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    							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” as the first 
dialed number, it automatically disables V.8 
protocol. (Alternatively, if “3” is the PSTN access 
code, set bit 3 to 1.)  
 
Communication Switch 1C [SP No. 1-104-029] 
No FUNCTION COMMENTS 
0-1 Extension access code (8 and 
9) to turn V.8 protocol On/Off   
0: On 
1: Off Refer to communication switch 1B. 
Example: If “8” is the PSTN access code, set bit 0 
to 1. When the machine detects “8” as the first 
dialed number, it automatically disables V.8 
protocol. (If “9” is the PSTN access code, use bit 
1.) 
2-7 Not used  Do not change the settings. 
 
Communication Switch 1D - Not used (do not change the settings) 
Communication Switch 1E - Not used (do not change the settings) 
Communication Switch 1F - Not used (do not change the settings) 
 
4.3.5 G3 SWITCHES 
G3 Switch 00 [SP No. 1-105-001] 
No FUNCTION COMMENTS 
0 
1 Monitor speaker during 
communication (tx and rx) 
Bit 1: 0, Bit 0: 0 = Disabled 
Bit 1: 0, Bit 0: 1 = Up to Phase 
B 
Bit 1: 1, Bit 0: 0 = All the time 
Bit 1: 1, Bit 0: 1 = Not used (0, 0): The monitor speaker is disabled all through 
the communication. 
(0, 1): The monitor speaker is on up to phase B in 
the T.30 protocol. 
(1, 0): Used for testing. The monitor speaker is on 
all through the communication. Make sure that 
you reset these bits after testing.
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    							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 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 the setting. 
6 Forbid CED/AMsam output 
0: Off 
1: On (Forbid output) Do not change this setting (Default: 0: Off), unless 
communication problem is caused by a CED or 
ANSam transmission. 
7 Not used  Do not change the setting. 
 
G3 Switch 02 [SP No. 1-105-003] 
No FUNCTION COMMENTS 
0 G3 protocol mode used 
0: Standard and non-standard 
1: Standard only Change this bit to 1 only when the other end can 
only communicate with machines that send T.30-
standard frames only. 
1: Disables NSF/NSS signals (these are used in 
non-standard mode communication) 
1-6 Not used  Do not change the settings. 
7 Short preamble 
0: Disabled 1: Enabled Refer to Appendix B in the Group 3 Facsimile 
Manual for details about Short Preamble. 
 
G3 Switch 03 [SP No. 1-105-004] 
No FUNCTION COMMENTS
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    							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 14.4 
kbps or lower. 
3 ECM frame size 
0: 256 bytes 
1: 64 bytes Keep this bit at “0” in most cases. 
4 CTC transmission conditions 
0: After one PPR signal 
received 
1: After four PPR signals 
received (ITU-T standard) 0: When using ECM in non-standard (NSF/NSS) 
mode, the machine sends a CTC to drop back the 
modem rate after receiving a PPR, if the following 
condition is met in communications at 14.4, 12.0, 
9.6, and 7.2 kbps.  
NTransmit- Number of transmitted frames 
NResend- Number of frames to be retransmitted 
1: When using ECM, the machine sends a CTC to 
drop back the modem rate after receiving four 
PPRs. 
PPR, CTC: These are ECM protocol signals. 
This bit is not effective in V.34 communications. 
5 Modem rate used for the next 
page after receiving a 
negative code (RTN or PIN) 
0: No change 1: Fallback 1: The machine’s tx modem rate will fall back 
before sending the next page if a negative code is 
received. This bit is ignored if ECM is being used. 
6 Not Used  Do not change the settings 
7 Select detection of reverse 
polarity in ringing 
0: Off  
1: On This switch is used to prevent reverse polarity in 
ringing on the phone line (applied to PSTN-G3 
ringing). Do not change this setting 
0: No detection 
 Outside Japan 
1: Detection 
 Inside Japan only 
 
 
G3 Switch 04 [SP No. 1-105-005] 
No FUNCTION COMMENTS 
0-3 Training error detection 
threshold 0 - F (Hex); 0 - 15 bits 
If the number of error bits in the received TCF is 
below this threshold, the machine informs the
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    							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 
transmission. 
Use the dedicated transmission parameters if 
you need to change this for specific receivers. 
If a modem rate 14.4 kbps or slower is selected, 
V.8 protocol should be disabled manually. 
Cross reference 
V.8 protocol on/off - G3 switch 03, bit2 
4-5 Initial modem type for 9.6 k or 
7.2 kbps. 
Bit 5: 0, Bit 4: 0 = V.29 
Bit 5: 0, Bit 4: 1 = V.17 
Bit 5: 1, Bit 4: 0 = V.34 
Bit 5: 1, Bit 4: 1 = Not used These bits set the initial modem type for 9.6 and 
7.2 kbps, if the initial modem rate is set at these 
speeds. 
6-7 Not used  Do not change the settings.
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    							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 speeds pose 
problems during reception. 
ƒ  If a modem rate 14.4 kbps or slower is 
selected, V.8 protocol should be 
disabled manually. 
Cross reference: 
V.8 protocol on/off - G3 switch 03, bit2 
Modem types available for reception 
Bit 7  Bit 6  Bit 5  Bit 4  Setting 
0 0 0 1  V.27ter 
0 0 1 0 V.27ter,V.29
0 0 1 1 V.27ter, 
V.29, V.33 
0 1 0 0 V.27ter, 
V.29, 
V.17/V.33 
4-7 
0 1 0 1 V.27ter, 
V.29, 
V.17/V33, 
V.34 ƒ  The setting of these bits is used to 
inform the transmitting terminal of the 
available modem type for the machine 
in receive mode. 
ƒ  If V.34 is not selected, V.8 protocol must 
be disabled manually. 
Cross reference: 
V.8 protocol on/off - G3 switch 03, bit2
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    							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 equalizer if one or more 
of the following symptoms occurs. 
Communication error 
Modem rate fallback occurs frequently. 
 
ƒ  This setting is not effective in V.34 
communications. 
2-3 PSTN cable equalizer 
(rx mode: Internal) 
Bit 3: 0, Bit 2: 0 = None 
Bit 3: 0, Bit 2: 1 = Low 
Bit 3: 1, Bit 2: 0 = Medium 
Bit 3: 1, Bit 2: 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. 
Also, try using the cable equalizer if one or more 
of the following symptoms occurs. 
Communication error with error codes such as  
 0-20, 0-23, etc. 
Modem rate fallback occurs frequently. 
 
ƒ  This setting is not effective in V.34 
communications. 
4 PSTN cable equalizer 
(V.8/V.17 rx mode: External) 
0: Disabled 
1: Enabled Keep this bit at “1”. 
5 Not used  Do not change the settings. 
6 Parameter selection for dial 
tone detection 
0: Normal parameter 
1: Specific parameter 0: This uses the fixed table in the ROM for dial 
tone detection. 
1: This uses the specific parameter adjusted with 
SRAM (69ECBEH - 69ECDEH). Select this if the 
dial tone cannot be detected when the Normal 
parameter: 0 is selected. 
7 Not used  Do not change the settings. 
 
 
G3 Switch 08 - Not used (do not change the settings) 
 
G3 Switch 09 - Not used (do not change the settings)
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    							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 switch setting determines if high-speed 
receiving ends if the carrier signal is lost when 
receiving during non-ECM mode 
3 Not used  Do not change the settings 
4 Maximum allowable frame 
interval during image data 
reception. 
0: 5 s 1: 13 s This bit set the maximum interval between EOL 
(end-of-line) signals and the maximum interval 
between ECM frames from the other end. 
Try using a longer setting if error code 0-21 is 
frequent. 
5 Not used  Do not change the settings. 
6 Reconstruction time for the 
first line in receive mode 
0: 6 s 1: 12 s When the sending terminal is controlled by a 
computer, there may be a delay in receiving page 
data after the local machine accepts set-up data 
and sends CFR. This is outside the T.30 
recommendation. But, if this delay occurs, set this 
bit to 1 to give the sending machine more time to 
send data. 
Refer to error code 0-20. 
ITU-T T.30 recommendation: The first line should 
come within 5 s of CFR. 
7 Not used  Do not change the settings. 
 
G3 Switch 0B - Not used (do not change the settings). 
G3 Switch 0C - Not used (do not change the settings) 
G3 Switch 0D - Not used (do not change the settings). 
 
G3 Switch 0E [SP No 1-105-015] 
0-7 
Set CNG send time interval 
Some machines on the receiving side may not be able to automatically switch the
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    							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 at the end of 
communication 
0: Disabled 
1: Enabled If the customer wants to hear an alarm if the 
handset is off-hook at the end of fax 
communication, change this bit to “1”. 
2 Not used  Do not change the settings. 
4 Sidaa manual calibration 
setting 
0: Off 
1: On  1: manually calibrates for communication with a 
line, whose current change occurs such as an 
optical fiber line. 
5-7 Not used  Do not change the settings. 
 
4.3.6 G3-2/3 SWITCHES 
These switches require an optional G3 interface unit. 
G3-3 switches are the same as for G3-2 switches. 
G3-2 Switch 00 [SP No. 1-106-001] 
No FUNCTION COMMENTS 
0-1 Monitor speaker during 
communication (tx and rx) 
Bit 1: 0, Bit 0: 0 = Disabled 
Bit 1: 0, Bit 0: 1 = Up to Phase 
B 
Bit 1: 1, Bit 0: 0 = All the time 
Bit 1: 1, Bit 0: 1 = Not used (0, 0): The monitor speaker is disabled all through 
the communication. 
(0, 1): The monitor speaker is on up to phase B in 
the T.30 protocol. 
(1, 0): Used for testing. The monitor speaker is on 
all through the communication. Make sure that 
you reset these bits after testing. 
2  Monitor speaker during  1: The monitor speaker is enabled during memory
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