delivery cover.
+5VDC is divided into +5V which is normally supplied to the ICs on the DC controller PCB
from the power supply and +5V for power-saving mode (P5VB1). Supply of +5V for the power-
saving mode is stopped when the sleep command is received from the video controller. During
standby mode and periods when printing is not possible (when /RDY signal is “H”), the +5V is
supplied OFF and ON.
The DC controller PCB gen5VC and supplies it to the laser driver.
This is shown in the block diagram below.
2. Protective Function
The +24VDC, +5VDC, and +3.3VDC power supply circuits have an over-current protective func-
tion and over-voltage protective function, which automatically interrupt output voltage to pro-
tect the circuits when a short circuit or other troubles on the load side result in over-current
flow or abnormal voltage.
If the over-current/over-voltage protective functions are activated, and no DC voltage is out-
put from the power supply circuits, turn OFF the power switch, rectify the trouble on the load,
and then turn ON the power switch again. Wait at least for 2 minutes before turning the power
switch ON again.
If over-current flows through the AC line, the circuit breaker in the power supply is turned
OFF to cut off the output voltage.
2 - 20
CHAPTER 2
Summary of Contents for LBP-3260
Page 8: ......
Page 10: ......
Page 12: ...This page intentionally left blank 1 2 CHAPTER 1 ...
Page 27: ...Figure 1 5 7 1 17 CHAPTER 1 ...
Page 36: ...This page intentionally left blank 1 26 CHAPTER 1 ...
Page 38: ......
Page 40: ......
Page 55: ...2 15 CHAPTER 2 ...
Page 71: ...This page intentionally left blank 2 31 CHAPTER 2 ...
Page 104: ......
Page 108: ...2 68 CHAPTER 2 ...
Page 110: ......
Page 160: ......
Page 194: ...This page intentionally left blank 4 34 CHAPTER 4 ...
Page 210: ...4 50 CHAPTER 4 ...
Page 212: ......
Page 214: ......
Page 222: ...A 10 APPENDIX This page intentionally left blank ...