Toshiba e-STUDIO 5540C Service Manual page 86

3.3.7 PC boards
Symbol
RADF RADF control PC board
CCD CCD driving PC board (CCD board)
SLG Scanning section control PC board
(SLG board)
INV Lamp inverter board
DSP Display PC board (DSP board)
KEY1 Key PC board-1 (KEY-1 board)
KEY2 Key PC board-2 (KEY-2 board)
IMG Image processing PC board
(IMG board)
SYS System control PC board (SYS board)
LGC Logic PC board (LGC board)
SNS H-sync detection PC board
(SNS board)
LDR-Y Laser driving PC board-Y
(LDR-Y board)
LDR-M Laser driving PC board-M
(LDR-M board)
LDR-C Laser driving PC board-C
(LDR-C board)
LDR-K Laser driving PC board-K
(LDR-K board)
EPU EPU PC board (EPU board)
V0S Drum surface potential sensors control
PC board (V0S board)
PFC Paper feeding control PC board (PFC
board)
ADU ADU control PC board (ADU board)
DRV DRV PC board
IH Heater control PC board
(IH board)
FIL Filter PC board (FIL board)
RAM-S SRAM board <for SYS board>
RAM-L SRAM board <for LGC board>
e-STUDIO5540C/6540C/6550C/5560C/6560C/6570C
OUTLINE OF THE MACHINE
Name
Controls the RADF.
Scanning originals with CCD
Controlling the scanning section
Controlling the exposure lamp
Controlling the whole control panel
Controlling the key switches and LEDs
Controlling the key switches and LEDs
Controlling the image processing
Controlling the whole system and
image processing
Controlling the print engine section
Detecting the laser beam position
Driving the Y laser diode
Driving the M laser diode
Driving the C laser diode
Driving the K laser diode
Storing information of the developer
unit (EPU)
Controlling the drum surface potential
(V0) sensors
Controlling paper feeding
Controlling the automatic duplexing unit
Controlling bypass unit, transfer belt
unit and paper exiting
Controlling the IH coil of the fuser unit
•
•
Storing the setting or adjustment value,
etc. used for the control by the system
control PC board
Storing the setting or adjustment value,
etc. used for the control by the logic PC
board
Function
Filtering out the AC power noise
Power supplying to each damp
heater
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Remarks P-I
Fig. 3-4 88-23
Fig. 3-5 54-15
Fig. 3-5 54-9
Fig. 3-5 52-4
Fig. 3-26 3-32
Fig. 3-26 3-31
Fig. 3-26 3-30
Fig. 3-22 68-13
Fig. 3-22 68-29
Fig. 3-22 69-18
Fig. 3-14 48-1
Fig. 3-14 48-1
Fig. 3-14 48-1
Fig. 3-14 48-1
Fig. 3-14 48-1
Fig. 3-11 61-24
Fig. 3-11 61-25
Fig. 3-22 69-23
Fig. 3-16 18-35
Fig. 3-6 46-35
Fig. 3-8 38-34
Fig. 3-22 70-6
Fig. 3-22 68-30
Fig. 3-22 69-20