2 - F - 8
WRITE UNIT
(8) MIND CHG (CB → IPB)
This signal selects the index signal.
[H]: External index signal
[L]: Internal index signal
(9) CORR (CB → IPB)
White data collection trigger used when shading cor-
rection is taking place
(10)RESET (CB → IPB)
Processing CPU reset signal (not used)
b. CB input signal
(1) IP REQ (IPB → CB)
Processing board communications enable signal
(2) INDEX (IPB → CB)
Write system index signal
(3) TXA 0, 1 (IPB → CB)
Data that is transferred serially from the IPB to the CB
(4) MPR (IPB → CB)
Image processing board power supply monitoring sig-
nal (connector check)
(5) O YOBI 1 (IPB → CB)
Spare output port
c. IPB output signal
(1) M40 PWR A (IPB → M40)
M40 A phase drive signal
(2) M40 PWR B (IPB → M40)
M40 B phase drive signal
(3) M40 DRIVE A/A' (IPB → M40)
M40 A phase drive pulse signal
(4) M40 DRIVE B/B' (IPB → M40)
M40 B phase drive pulse signal
(5) LD1 APC CONT 1, 2 (IPB → LDB1)
APC (laser light intensity automatic adjustment) of
LD1 takes place according to the combination of
these two signals.
(6) LD1 VIDEO (IPB → LDB1)
LD1 laser image data
(7) LD1 IRCLK (IPB → LDB1)
LD1 APC clock signal
(8) LD1 DACK (IPB → LDB1)
LD1 MPC signal
(9) LD1 DI (IPB → LDB1)
LD1 MPC signal
(10)LD2 LOAD (IPB → LDB2)
LD2 MPC signal
(11)LD2 APC CONT 1, 2 (IPB → LDB2)
APC (laser light intensity automatic adjustment) of
LD2 takes place according to the combination of
these two signals.
(12)LD VIDEO (IPB → LDB2)
LD2 laser image data
(13)LD2 IRCLK (IPB → LDB2)
LD2 APC clock signal
(14)LD2 DACK (IPB → LDB2)
LD2 MPC signal
(15)LD2 DI (IPB → LDB2)
LD2 MPC signal
(16)LD1 LOAD (IPB → LDB1)
LD2 MPC signal
(17)HLVL (IPB → INDEXSB)
5 VDC for monitoring power supply
d. IPB input signals
(1) LD1 ALM (LDB1 → IPB)
Signal which indicates an abnormality in the laser drive
current
[H]: Normal
[L]: Abnormal
(2) LD2 ALM (LDB2 → IPB)
Signal which indicates an abnormality in the laser drive
current
[H]: Normal
[L]: Abnormal
(3) M INDEX 1, 2 (INDEXSB → IPB)
Index signal for detection of main scanning skew
(4) S INDEX 1, 2 (INDEXSB → IPB)
Index signal for detection of sub scanning skew
(5) IPR (INDEXSB → IPB)
INDEXSB power supply monitoring signal (connector
check)
[H]: Normal
[L]: Abnormal
(6) LD1 LPR (LDB1 → IPB)
LD1 power supply monitoring signal (connector check)
[H]: Normal
[L]: Abnormal
(7) LD2 LPR (LDB2 → IPB)
LD2 power supply monitoring signal (connector check)
[H]: Normal
[L]: Abnormal
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