SERVICE MANUAL
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10FEB97 – SM3226-1
[20] Refer to Figure 1, Time Delay Setting to the Turn Laser Diode On. Verify the end of the falling edge for TP13
(LASER DIODE Reference Current) and the start of the rising edge of TP18 (LASER DIODE Output Power)
is 80-90 nsec.
Figure 5–1
Time Delay Setting to Turn On Laser Diode
[21] If necessary, adjust VR6 of the LDC BOARD.
[22] If the ringing continues on TP13, adjust VR6 to reduce ringing. Adjust VR7 to achieve the required Time Delay
setting of 80-90 nsec.
[23] Refer to Figure 2, Pulse Width of the LASER DIODE light power. Verify the end of the falling edge for TP18
(LASER DIODE Output Power) and the end of the falling edge of TP13 (LASER DIODE Reference Current)
is 10-15 nsec.
Figure 5–2
Pulse Width of Laser Diode Light Power
TP18
TP13
80-90 nsec
H129_91
10-15 nsec
H129_91
TP13
TP18
