Canon iR4570 Series Service Manual page 146

Chapter 2
If IC6 [1] is not found, you need not mount any.
If you are mounting a ROM (IC6) [1] or replacing it for upgrading the connector, be sure to shift bit 7 of the DIP
switch [2] (SW2-7) to ON.
9) Set the bits of the DIP switch [1] (SW3) on the PCB as indicated in the table.
Switch
notation
SW3-1
SW3-2
SW3-3
SW3-4
SW3-5
SW3-6
2-36
[1]
LED1 LED2 LED3
2
1
SW2
LED5
SW4
LED6
LED4
IC6
SW1
CN3
F-2-84
T-2-6
Setting SW3-1 SW3-2
OFF OFF
ON OFF
see
right OFF ON
ON ON
OFF keep at OFF at all times.
ON selects push pulse for controller line setting.
OFF selects dial pulse for controller line setting.
ON selects 20PPS for dial pulse speed.
OFF selects 10PPS for dial pulse speed.
not
- used
6
BAT1
1
1
SW3
2
CN4
CN2
function
sets the modem signal transmission
level to -16 dBm.
sets the modem signal transmission
level to -14 dBm.
sets the modem signal transmission
level to -12 dBm.
sets the modem signal transmission
level to -10 dBm.