Ricoh Mp C3000 Service Manual

							Service RAM Addresses 
SM 119 B786 
B786 
Fax Option 
680394(H)  - Optional equipment (Read onl y – Do not change the settings) 
Bit 0: Page Memory    0:  Not installed, 1: Installed 
Bit 1: SAF Memory     0: Not installed, 1: Installed 
Bits 2 to 7; Not used 
680395(H)  - Optional equipment (Read onl y – Do not change the settings) 
Bits 0 to 3: Not used  
Bit 4: G3-2 0: Not installed, 1: Installed 
Bit 5: G3-3 0: Not installed, 1: Installed 
Bit 6 and 7: Not used 
680406 to 68040A  – Option G3 board (G3-2) ROM information (Read only) 
680406(H) - Suffix (BCD) 
680407(H) - Version (BCD) 
680408(H) - Year (BCD) 
680409(H) - Month (BCD) 
68040A(H) - Day (BCD) 
68040B to 68040F  – Option G3 board (G3-3) ROM information (Read only) 
68040B(H) - Suffix (BCD) 
68040C(H) - Version (BCD) 
68040D(H) - Year (BCD) 
68040E(H) - Month (BCD) 
68040F(H) - Day (BCD) 
680410(H)  - G3-1 Modem ROM version (Read only) 
680412(H)  - G3-2 Modem ROM version (Read only) 
680414(H)  - G3-3 Modem ROM version (Read only) 
680420(H)  - Number of multiple sets print (Read only) 
680476(H)  - Time for economy transmission (hour in 24h clock format - BCD) 
680477(H)  - Time for economy transmission (minute - BCD)  
680492(H)  - Transmission monitor volume 00 - 07(H) 
680493(H)  - Reception monitor volume  00 - 07(H) 
680494(H)  - On-hook monitor volume  00 - 07(H) 
680495(H)  - Dialing monitor volume  00 - 07(H) 
680496(H)  - Buzzer volume   00 - 07(H) 
680497(H)  - Beeper volume    00 - 07(H) 
6804A8(H)  - Machine code (Check ram 4)   
688E8E to 68918D(H)  - SIP server address (Read only) 
688E8E(H) - Proxy server - Main (Max. 128 characters - ASCII)  
						

							Service RAM Addresses 
B786 120  SM 
688F0E(H) - Proxy server - Sub (Max. 128 characters - ASCII) 
688F8E(H) - Redirect server - Main (Max. 128 characters - ASCII) 
68900E(H) - Redirect server - Sub (Max. 128 characters - ASCII) 
68908E(H) - Registrar server - Main  (Max. 128 characters - ASCII) 
68910E(H) - Registrar server - Sub (Max. 128 characters - ASCII) 
68918E(H)  - Gatekeeper server address - Ma in (Max. 128 characters - ASCII) 
68920E(H ) - Gatekeeper server address - Sub (Max. 128 characters - ASCII) 
68928E(H)  - Arias Number (Max. 128 characters - ASCII) 
68930E(H)  - SIP user name (Max. 128 characters - ASCII) 
68938E(H) - SIP digest authentication password  (Max. 128 characters - ASCII) 
68940E(H)  - Gateway address information (Max. 7100 characters - ASCII) 
68AFCA(H)  - Stand-by port number for H.232 connection 
68AFCCH)  - Stand-by port number for SIP connection 
68AFCE(H)  - RAS port number 
68AFD0(H)  - Gatekeeper port number 
68AFD2(H)  - Port number of data waiting for T.38 
68AFD4(H)  - Port number of SIP server 
68AFD6(H)  - Priority for SIP and H.323  0: H.323, 1: SIP 
68AFD7(H)  - SIP function  0:  Disabled, 1: Enabled 
68AFD8(H)  - H.323 function  0:  Disabled, 1: Enabled 
68AFD9(H) - SIP digest authentication function  0: Disabled, 1: Enabled 
68AFDA(H) - IP-Fax backup data  00 - 600 (H) 
69ECBE(H) - 69ECDE(H) - IMPORTANT:  Do not change the values
 of these RAM 
addresses. They are not for use in the field. 
6BEBFE(H) –  IMPORTANT: Do not change the values
 of these RAM addresses. They 
are not for use in the field. 
6BEBFF(H)  – IMPORTANT:  Do not change the values
 of these RAM addresses. They 
are not for use in the field. 
6BEC00(H)  – IMPORTANT:  Do not change the values
 of these RAM addresses. They 
are not for use in the field. 
6BEC01(H)  – IMPORTANT:  Do not change the values
 of these RAM addresses. They 
are not for use in the field. 
6BEC02(H)  – IMPORTANT:  Do not change the values
 of these RAM addresses. They 
are not for use in the field. 
6BEC03 to 6BEC04  – IMPORTANT:  Do not change the values
 of these RAM addresses. 
They are not for use in the field.
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Rev. 04/2007 
						

							Service RAM Addresses 
SM 121 B786 
B786 
Fax Option 
  
6BEC05(H)  – IMPORTANT:  Do not change the values
 of these RAM addresses. They 
are not for use in the field. 
6BEC06(H)  – IMPORTANT:  Do not change the values
 of these RAM addresses. They 
are not for use in the field. 
 
⇒  ⇒ 
Rev. 04/2007  
						

							Overview 
B786 122  SM 
5.  DETAILED SECTION DESCRIPTIONS 
5.1 OVERVIEW 
 
The basic fax unit consists of  two PCBs: an FCU and an MBU. 
The FCU controls all the fax communications  and fax features, in cooperation with the 
controller board. The MBU contains th e ROM and SRAM. Also, the FCU has an NCU 
circuit. 
Fax Options: 
1.  Extra G3 Interface option: This provides one more analog line interface. This allows  full dual access. Two extra G3 interface options can be installed. 
2.  Memory Expansion: This expands the  SAF memory and the page memory (used for 
image rotation); without this expansion,  the page memory is not big enough for image 
rotation at 400 dpi, so transmission at 400 dpi is not possible.  
						

							Boards 
SM 123 B786 
B786 
Fax Option 
5.2 BOARDS 
5.2.1 FCU 
 
The FCU (Facsimile Control Unit) controls  fax communications, the video interface to the 
base copier’s engine, and all the fax options.. 
FACE3 (Fax Application Control Engine) 
ƒ CPU 
ƒ  Data compression and reconstruction (DCR) 
ƒ DMA control 
ƒ Clock generation 
ƒ  DRAM backup control 
Modem (FAME) 
ƒ  V.34, V33, V17, V.29, V.27ter, V.21, and V.8 
DRAM 
ƒ  The 16 MB of DRAM is shared as follows.  SAF memory        : 4MB 
Working memory     : 8MB 
Page memory       : 4MB 
ƒ  The SAF memory is backed up by a rechargeable battery. 
Memory Back-up 
ƒ  A Rechargeable battery backs up t he SAF memory (DRAM) for 1 hour.  
						

							Boards 
B786 124  SM 
5.2.2 MBU 
On this board, the flash ROM contains the FCU firmware, and the SRAM contains the 
system data and user parameters. Even if t he FCU is changed, the system data and user 
parameters are kept on the MBU board. 
ROM 
ƒ  3MB flash ROMs for system software storage   2MB (16bit x 1MB) + 1MB (16bit x 512K) 
SRAM 
ƒ  The 256KB SRAM for system and user para meter storage is backed up by a lithium 
battery. 
Memory Back-up 
ƒ  A lithium battery backs up the system parameters and programmed items in the  SRAM, in case the base copiers main switch is turned off. 
Switches 
 
Item   Description 
SW1  Switches the SRAM backup battery on/off. 
  
						

							Boards 
SM 125 B786 
B786 
Fax Option 
5.2.3 SG3 BOARD 
 
The SG3 board allows up to three simultaneous communications when used in 
combination with the FCU and optional G3 boards. The NCU is on the same board as the 
common SG-3 board. This makes the total board  structure smaller. But, the specifications 
of the SG3 board do not change. 
NCCP (New Communication Control Processor) 
ƒ  Controls the SG3 board. 
ƒ CPU (RU30) 
ƒ  DPRAM (Dual Port RAM): Handshaking with  the FCU is done through this block. 
ƒ DMA controller 
ƒ JBIG 
ƒ  DSP V34 modem (RL5T892): Includes  the DTMF Receiver function 
ƒ  DCR for MH, MR, MMR, and JBIG compression and decompression 
FROM 
ƒ  1Mbyte flash ROM for SG3 software  storage and modem software storage 
SDRAM 
ƒ  4Mbyte DRAM shared between ECM buffer, line buffer, and working memory  
						

							Boards 
B786 126  SM 
AFE (Analog Front End) 
ƒ Analog processing 
CODEC (COder-DECoder) 
ƒ  A/D & D/A conversions for modem 
REG 
ƒ  Generates +3.3 V from the +5V from the FCU  
						

							Video Data Path 
SM 127 B786 
B786 
Fax Option 
5.3 VIDEO DATA PATH 
5.3.1 TRANSMISSION 
 
Memory Transmission and Parallel Memory Transmission 
The base copiers scanner scans t he original at the selected resolution in inch format. The 
BICU processes the data and tr ansfers it to the FCU. 
 
ƒ  When scanning a fax original, the BICU  uses the MTF, independent dot erase and 
thresholding parameter settings programmed  in the fax unit’s scanner bit switches, 
not the copiers SP modes. 
Then, the FCU converts the data to mm form at, and compresses the data in MMR or raw 
format to store it in the SAF memory. If im age rotation will be done, the image is rotated in 
page memory before compression. 
At the time of transmission, the FCU decompresses the stored data, then re-compresses  
						

							Video Data Path 
B786 128  SM 
and/or reduces the data if necessary for transmission. The NCU transmits the data to the 
line. 
Immediate Transmission 
The base copiers scanner  scans the original at the reso lution agreed with the receiving 
terminal. The BICU video processes the  data and transfers it to the FCU. 
 
ƒ  When scanning a fax original, the BICU  uses the MTF, independent dot erase and 
thresholding parameter settings programmed  in the fax unit’s scanner bit switches, 
not the copiers SP modes. 
Then the FCU stores the data in page memory , and compresses the data for transmission. 
The NCU transmits the data to the line. 
JBIG Transmission 
ƒ  Memory transmission:  If the receiver has JBIG compression, the data goes from the 
DCR to the QM-Coder. Then the NCU transmits  the data to the line. When an optional 
G3 unit (SG3) is installed and PSTN2 is se lected as the line type, JBIG compression 
is available, but only for the PSTN-2 line. 
ƒ  Immediate transmission:  If the receiver has JBIG compression, the data goes from 
the page memory to the QM-Coder. Then the NCU transmits the data to the line. 
When an optional G3 unit (SG3) is install ed and PSTN2 is selected as the line type, 
JBIG compression is available, but only for the PSTN-2 line. 
Adjustments 
Priority for the line used for G3 transmissions  (PSTN 1/PSTN 2 or 3): System switch 16 bit 
1