Ricoh B079, Service Manual

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BIT SWITCHES
B547 42 SM
System Switch 00 SP No. 1-101-001
No FUNCTION COMMENTS
2
Rx level calculation
Example: 0000 32 V34 288/264 L 01 00 03 04
The four-digit hexadecimal value (N) after “L” indicates the rx level.
The high byte is given first, followed by the low byte. Divide the decimal value of N by -
16 to get the rx level.
In the above example, the decimal value of N (= 0100 [H]) is 256.
So, the actual rx level is 256/-16 = -16 dB
3 Not used Do not change the setting.
4 Line error mark on the received
page
0 : Disabled
1 : Enabled
If this bit is 1, a mark will be printed on the left edge
of the page at any place where a line error occurred
in the data. Such errors are caused by a noisy line
for example.
5
G3/G4 communication
parameter display
0: Disabled
1: Enabled
This is a fault-finding aid. The LCD shows the key
parameters (see below). This is normally disabled
because it cancels the CSI display for the user.
Be sure to reset this bit to 0 after testing.
6 Protocol dump list output after
each communication
0: Off
1: On
This is only used for communication
troubleshooting. It shows the content of the
transmitted facsimile protocol signals. Always reset
this bit to 0 after finishing testing.
If system switch 09 bit 6 is at “1”, the list is only
printed if there was an error during the
communication.
7 Not used Do not change the setting.
G3 Communication Parameters
Modem rate
336: 33600 bps 168: 16800 bps
312: 31200 bps 144: 14400 bps
288: 28800 bps 120: 12000 bps
264: 26400 bps 96: 9600 bps
240: 24000 bps 72: 7200 bps
216: 21600 bps 48: 4800 bps
192: 19200 bps 24: 2400 bps
Resolution S: Standard (8 x 3.85 dots/mm)
D: Detail (8 x 7.7 dots/mm)
F: Fine (8 x 15.4 dots/mm)
SF: Superfine (16 x 15.4 dots/mm)
21: Standard (200 x 100 dpi)
22: Detail (200 x 200 dpi)
44: Superfine (400 x 400 dpi)
Compression mode MMR: MMR compression
MR: MR compression
MH: MH compression
JBO: JBIG compression (Optional mode)
JBB: JBIG compression (Basic mode)
Communication
mode ECM: With ECM
NML: With no ECM