Service manual

WRITE UNIT
2-D-6
2 UNIT EXPLANATION
2. Signals
a. ICB IFB input signals
(1) M INDEX 1, 2 (INDEXSB to ICB IFB)
This is an index signal used to detect deviation of
vertical scanning.
(2) S INDEX 1, 2 (INDEXSB to ICB IFB)
This is an index signal used to detect deviation of
horizontal scanning.
(3) IPR (INDEXSB to ICB IFB)
This signal monitors the INDEXSB power supply.
[H]:Normal
[L]: Abnormal
(4) LD1 ALM (LDB1 to ICB IFB)
This signal indicates the state of the LD1 laser
drive current.
[H]:Normal
[L]: Abnormal
(5) LD1 PR (LDB1 to ICB IFB)
LD1 power supply monitor signal.
[H]:Normal
[L]: Abnormal
(6) LD2 ALM (LDB2 to ICB IFB)
This signal indicates the state of the LD2 laser
drive current.
[H]:Normal
[L]: Abnormal
(7) LD2 PR (LDB2 → ICB IFB)
LD2 power supply monitor signal.
[H]:Normal
[L]: Abnormal
b. ICB IFB output signals
(1) M24 PWR A (ICB IFB to M24)
M24 A-phase drive signal.
(2) M24 PWR B (ICB IFB to M24)
M24 B-phase drive signal.
(3) M24 DRIVE A/A’ (ICB IFB to M24)
M24 A-phase drive pulse signal.
(4) M24 DRIVE B/B’ (ICB IFB to M24)
M24 B-phase drive pulse signal.
(5) LD1 SH (ICB IFB to LDB1)
One scan line equivalent APC sampling signal.
(6) LD1 ENB (ICB IFB to LDB1)
Laser APC function ON/OFF control signal.
Laser beam emission stops when it is OFF.
(7) LD2 SH (ICB IFB to LDB2)
One scan line equivalent APC sampling signal.
(8) LD2 ENB (ICB IFB to LDB2)
Laser APC function ON/OFF control signal.
Laser beam emission stops when it is OFF.
(9) LD1 VIDEO (ICB IFB to LDB1)
LD1 laser image signal.
(10) LD2 VIDEO (ICB IFB to LDB2)
LD2 laser image signal.
(11) LD1 DCLK (ICB IFB to LDB1)
LD1 clock signal for MPC value data transmis-
sion.
(12) LD1 DI (ICB IFB to LDB1)
LD1 data signal for MPC.
(13) LD1 AD (ICB IFB to LDB1)
LD1 MPC value storage command signal.
(14) LD2 DCLK (ICB IFB to LDB2)
LD2 clock signal for MPC value data transmis-
sion.
(15) LD2 DI (ICB IFB to LDB2)
LD2 data signal for MPC.
(16) LD2 AD (ICB IFB to LDB2)
LD2 MPC value storage command signal.
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