Brother DCP-L5500D, Руководство по обслуживанию

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6-1
Confidential
CHAPTER 6 WIRING DIAGRAM
1. WIRING DIAGRAM

Machine
5V tolerant +3.3V VCC VM +24VF S0V 14
(DCM_ENC2) RMTB_ENABLE ENBn AOUT 13
SLEEPn /B ENC_VCC 12 /B 12 1 /B
CIS_MODE_BS RMTB_STEP STEP B BOUT 11 B 11 2 B
CIS_TG_BS (DCM_PHA) RMTB_DIR DIR /A MOTOR- 10 /A 10 3 /A
CIS_CLK_BS (DCM_EN)RMTB_USM0 USM0 A MOTOR+ 9 A 9 4 A
1 OS1 CISIN0 ADCK AFEMCLK (DCM_STB) RMTB_USM1 USM1 VDD_FCS 8
2
GND SHD AFEVSMP (DCM_ENC1) RMTB_VREF VREF S0V 7 LED_3.3V
3 OS2 CISIN1 SEN_ADF_REAR 6 SGND FG
4 GND SCLK AFE_SCK DIR VM +24VF VDD_FCS 5 ADF_REAR
5 OS3 CISIN2 SDATA AFE_SDI ENBn OUT- S0V 4
6
GND AVDD SLEEPn OUT+ ADF_FRONT_SEN 3 1 S0V Encoder
7 VDD OVDD D[7:0] AFED[9:2] MDM_HOOK nFAULT S0V 2 2 AOUT
8 VREF AFED[1:0]
+5.3V
ADF_COVER_SW 1 LED_3.3V 3 ENC_VCC
9 MODE Scanning Speed SGND 4 BOUT
10
SP
CIS_R33V0N
28/24ipm model : 12pin ADF_FRONT 5 MOTOR-
11 GND +3.3V
50ipm model : 14pin
6 MOTOR+
12 CLK VDC DCIS_SEN
13 LEDCA +5.3V +5.3V LVDD EN CIS_LED_EN ADF_REAR_SEN
14
LEDB LED_R CONT_B CIS_LEDB_BS ADF_FRONT_SEN
15 LEDG LED_G CONT_G CIS_LEDG_BS ADF_COV_SEN
16 LEDR LED_B CONT_R CIS_LEDR_BS +3.3V VCC +24VF
LVSS RMTA_ENBLE ENBn
R3.3V RMTA_SLEEP SLEEPn /B /B 4 1 /B
RMTA_STEP STEP B B 3 2 B
Vout Vin +5.3V CIS_R33V0N RMTA_DIR DIR /A /A 2 3 /A
EN CIS_R33V0N RMTA_USM0 USM0 A A 1 4 A
RTMA_USM1 USM1
CIS_MODE RMTA_VREF VREF
CIS_TG FG
CIS_CLK
1
OS1 CISIN0 ADCK DDR_MMZQ
2 GND SHD DDR_DDR3VOUT
3 OS2 CISIN1
4 GND SCLK
5
OS3 CISIN2 SDATA DDR_MMVREF
6 GND AVDD
7 VDD OVDD D[7:0] DDR_MMCK
8 VREF DDR_MMXCK
9
MODE DDR_MMCKE0
10 SP DDR_MMCKE1
11 GND DDR_MMXRESET
12 CLK VDC DDR_MMXRAS
13
LEDCA +5.3V +5.3V LVDD EN AFE_SEN DDR_MMXCAS
14 LEDB LED_R CONT_B CIS_LEDB DDR_MMXWE
15 LEDG LED_G CONT_G CIS_LEDG DDR_MMXCS0
16 LEDR LED_B CONT_R CIS_LEDR DDR_MMXCS1
LVSS
DDR_MMODT0
DDR_MMODT1
ADF_REARB_SEN
DDR_MMA[15:0]
DDR_MMBA[2:0]
DDR_MMDQS1
LDO VDD_LCD LED- 1 21 LED-
DDR_MMDQS0
+24V LED+ 2 20 LED+
DDR_MMXDQS1
RD 3 19 RD
DDR_MMXDQS0
WR 4 18 WR
DDR_MMDM[1:0]
GND 5 17 GND
DDR_MMDQ[15:0]
DCDC RS 6 16 RS
DDR_VDDIO15 +1.5V
CS 7 15 CS
DDR_VDDIOCK15 +1.5V
RESET 8 14 RESET
GND 9 13 GND
VDD_LCD VDD 10 12 VDD
LDO VDD_LCD IOVCC 11 11 IOVCC
TE FMARK 12 10 FMARK
GND 13 9 GND
D10 14 8 D10
D11 15 7 D11
D12 16 6 D12
D13 17 5 D13
PNL_TX3_P
D14 18 4 D14
PNL_TX3_N
D15 19 3 D15
VDD24 25 1 24V +24V D16 20 2 D16
PNL_TX2_P
S0V 24 2 S0V D17 21 1 D17
PNL_TX2_N
+3.3V VDD3 23 3 VDD3
La GIJI 1 1 GIJI MDM_GIJI
S0V 22 4 S0V
Lb TELOFF 2 2 TELOFF MDM_TELOFF
PNL_TCLK_P PNL_SERDES_CLKP 21 5 PNL_SERDES_CLKP
FG MDM_MONI 3 3 MDM_MONI
PNL_TCLK_N PNL_SERDES_CLKN 20 6 PNL_SERDES_CLKN
FG CSn 4 4 CSn MDM_SPICSN
S0V 19 7 S0V
Rin 5 5 Rin MDM_CI
PNL_TX1_P PNL_SERDES1_P 18 8 PNL_SERDES1_P
RESETn 6 6 RESETn MDM_RESETN
PNL_TX1_N PNL_SERDES1_N 17 9 PNL_SERDES1_N REG_PU 8 1 REG_PU
Ta IRQ 7 7 IRQ MDM_INTN
S0V 16 10 S0V HOST_WAKE 7 2 HOST_WAKE
Tb SGND 8 8 SGND
PNL_TX0_P PNL_SERDES0_P 15 11 PNL_SERDES0_P GND 6 3 GND
SPICLK 9 9 SPICLK MDM_SPICLK
PNL_TX0_N PNL_SERDES0_N 14 12 PNL_SERDES0_N SCL 5 4 SCL
SGND 10 10 SGND
S0V 13 13 S0V GND 4 5 GND
SPIOUT 11 11 SPIDOUT MDM_SPIDOUT
PANEL2 RST 12 14 RST SDA 3 6 SDA
+3.3V 12 12 +3.3V
PANEL0 MAIN_RXD 11 15 MAIN_RXD NFC_WAKE 2 7 NFC_WAKE
SPIDIN 13 13 SPIDIN MDM_SPIDIN
PANEL1 MAIN_TXD 10 16 MAIN_TXD Touch Panel Cir.
+3.0VP
VDD3P 1 8 VDD3P
SGND 14 14 SGND MDM_RING
S0V 9 17 S0V
+24V 15 15 +24V
SCL1 PNL_I2C_SCL1 8 18 PNL_I2C_SCL1
S0V 7 19 S0V
MDM_SPKR_ONN
SDA1 PNL_I2C_SDA1 6 20 PNL_I2C_SDA1
VDD3 5 21 VDD3
+24V
VDD24 12 1 VDD24 +24V
PANEL4 INT 4 22 INT X+ 11 2 X+ X+ 4 1 X+
2 VO1
PANEL3 TE 3 23 TE TE Y- 10 3 Y- Y+ 3 2
1 VO2
SW_ONOFF POWER_ON 2 24 POWER_ON X- 9 4 X- X- 2 3 X-
TLVVDD33 +3.3V VDD5.3 1 25 VDD5.3 Y+ 8 5 Y+ Y- 1 4 Y-
TLVVDD11 +1.17V ON_OFFKEY 7 6 ON_OFFKEY
TLVVSS INT_N 6 7 INT_N INT Key
+3.3V
VDD3 5 8 VDD3
+3.3V
SIN(0-9)
I2C_CLK 4 9 I2C_CLK SCL
S0V 3 10 S0V +5.3V +24V
I2C_DATA 2 11 I2C_DATA SDA
+5.3V VDD5.3 1 12 VDD5.3
+5.3V
LED(0-5) LED
+3.3V 1
POWER SW
(THM_INTERNAL) AI11 THM_INTERNAL 2
+24V 20 1 +24V
SCL0
GRIDDCN GRIDC 19 2 GRIDC
SGND 1 1 SGND
SDA0
HV_ENABLE HV-ENABLE 18 3 HV-ENABLE
LED_3.3V LED_VCC 2 2 LED_VCC
HVPWM_DEV PWM-DEV 17 4 PWM-DEV
SEN_MP_PE
3 3
SEN_MP_PE
+3.3V SCL0
HVPWM_CHG PWM-CHG 16 5 PWM-CHG
A[2:0]=111 SDA0
HVPWM_TRCV PWM-TRCV 15 6 PWM-TRCV
HVPWM_TRCC PWM-TRCC 14 7 PWM-TRCC
(MP PE) SEN3 SEN_MP_PE 13 8 SEN_MP_PE
SPI_DATA[3:0]
(REGF) SEN1 SEN_REG_F 12 9 SEN_REG_F
SGND 1 1 SGND
SPI_CS0
(PEDGE) SEN0 SEN_REG_EDGE 11 10 SEN_REG_EDGE
LED_3.3V LED_VCC 2 2 LED_VCC
SPI_CS1
(REGR) SEN2 SEN_REG_R 10 11 SEN_REG_R
SEN_EDGE 3 3 SEN_EDGE
+3.3V +3.3V
SPI_CS2
(FB_DEV) AI5 FB-DEV 9 12 FB-DEV
(FB_GRID) AI4 FB-GRID 8 13 FB-GRID
(FB_TRCCV) AI3 FB-TRCCV 7 14 FB-TRCCV
(FB_TR) AI2 FB-TRCC 6 15 FB-TRCC
(FB_CHG) AI0 FB-CHG 5 16 FB-CHG
LED_3.3V LED3.3V 4 17 LED3.3V SEN_REG_REAR 1 1 REG_REAR
SPI_CLK
HVGND 3 18 HVGND SEN_REG_FRONT 2 2 REG_FRONT
S0V 2 19 S0V LED_3.3V LED_3.3V 3 3 LED_3.3V
+3.3V VDD3 1 20 VDD3 SGND 4 4 SGND
High-Side SW
EN USBH_PPON1
Fault USBH_OCI1
(REAR COVER) SEN10 SEN_RCOVER/DX 1
+5V +5.3V
S0V 2
LDO
1 VBUS Vout Vin VOUT Vin
2 DATA- USBH_DM1
3 DATA+ USBH_DP1
+5.3V ANODE 1 1 ANODE
4 S0V
CATHODE 2 2 CATHODE
5 FG
ERASE_LAMP
6 FG
RTERM_CAL0
+3.3V AVDD33_1_USB2
+24V +24V 11 11 +24V +24V 2
High-Side SW
DEV_CLUTCH DEV_CLUTCHn 10 10 DEV_CLUTCHn CLUTCHn 1
EN USBH_PPON2
SOL_CLT1 MP_SOLn 9 9 MP_SOLn
Fault USBH_OCI2
SOL_CLT2 T1_CLUTCH T1_CLUTCHn 8 8 T1_CLUTCHn +24V 2
+5V
+5.3V
REG_CLUTCHn 7 7 REG_CLUTCHn SOLn 1
LDO
SEN_TONER 6 6 SEN_TONER
1 VBUS Vout Vin VOUT Vin
(TONER) AI8 S0V 5 5 S0V
+24V
2
2 DATA- USBH_DM2
LED_3.3V LED_VCC 4 4 LED_VCC CLUTCHn 1
3
DATA+
USBH_DP2
(PNEW) SEN6 SEN_PNEW 3 3 SEN_PNEW
4 S0V
(FRONT COVER) SEN9 NC 2 2 NC +24V 2
5 FG
48MHz <-- VDD3_INTLK_SW 1 1 VDD3_INTLK_SW CLUTCHn 1
6 FG
133MHz <-- SXOUT
200MHz <--
400MHz <-- SXIN SEN_TONER 2
2
SEN_TONER
(ADC) AVDD1 +1.17V S0V 1 1 SGND
AVDDPLL +1.17V
SCL2 S0V 1
1 PC_+5V USBF_VBUS
SDA2 NC 2
2
DATA_M
USBF_DM
INTLK_SW 3
3 DATA_P USBF_DP
4 GND RTERM_CAL1
+3.3V AVDD33_2_USB2
+3.3VI 1 22 +3.3VI LVD
S0V 2 21 SGND
VIDEO2N 3 20 VIDEO2N
VDO2N VIDEO2P 4 19 VIDEO2P
VDO2P S0V 5 18 SGND
VDO1N VIDEO1N 6 17 VIDEO1N
WLAN_ON
VDO1P VIDEO1P 7 16 VIDEO1P
SGND 1 1 SGND
S0V 8 15 SGND
+3.3V 2 2 +3.3V
LD_PWR_PWM1 PWR_PWM 9 14 PWR_PWM
SDIO_DATA0 3 3 SDIO_DATA0 SDIO0_DATA0
VENB ENA 10 13 ENA
SDIO_DATA1 4 4 SDIO_DATA1 SDIO0_DATA1
VDOCAL1 SH1 11 12 SH1
SDIO_DATA3 5 5 SDIO_DATA3 SDIO0_DATA3
VDOCAL2 SH2 12 11 SH2
SDIO_CLK 6 6 SDIO_CLK SDIO0_CLK
+3.3V +3.3V 13 10 +3.3V VCC
SDIO_DATA2 7 7 SDIO_DATA2 SDIO0_DATA2
VBDN BDn 14 9 BDn
SDIO_CMD 8 8 SDIO_CMD SDIO0_CMD
MOTOR_FG 15 8 MOTOR_FG
VDD W 16 7 W
MD1_CLK W 17 6 W
MD1_DO DAT V 18 5 V MOTOR_FG 5 1 MOTOR_FG
MD1_RSTN RST V 19 4 V W 4 2 W
MD1_THM_ALM ALERT U 20 3 U V 3 3 V
+3.3V CKXTAL1
ENB U 21 2 U U 2 4 U
CKXTAL2
PNP CENTER_TAP 22 1 CENTER_TAP CENTER_TAP 1 5 CENTER_TAP
PHYRSTB
MD1_SCANCTL PNM
INTB
MD1_SCANFGS FGP DEV_CLUTCH
1 TX+ 1 TD+ MDI+[0] REF_CLK
T1_CLUTCH
2
TX-
2
TD-
MDI-[0]
VCCP
3 RX+ 3 CT1
MNP FG+ 1 1 FG+
4 - 4 NC TXD[1:0]
MD1_MAINCTL MNM FG- 2 2 FG-
5 - 5 NC TXEN
MD1_MAINFGS FGM HU+ 3 3 HU+ Hall IC
6
RX-
6
NC
MDC
MD1_MAIN_HALL FGH HU- 4 4 HU-
7 - 7 RD+ MDI+[1] MDIO
HV+ 5 5 HV+
8 - 8 RD- MDI-[1] CRS_DV
HV- 6 6 HV-
REVIO1 TEST1 HW+ 7 7 HW+ Hall IC
TEST3 HW- 8 8 HW-
RXD[1:0]
VCCm S0V 9 9 SGND
+3.3V 10 10 +3.3V
VDD_ddc V 11 11 V
DD_out V 12 12 V
DD_fb U 13 13 U
+3.3V
U 14 14 U Hall IC
CKXTAL2 ETH_REFCLK
REG5_out W 15 15 W
TD4+ MDI0+ PHYRSTB ETH_RSTN
W 16 16 W
MD4- MDI0- INTB/PMEB EXINT0N
7 MX4+ TCT4 RXC/PHYAD1 ETH_RXCLK
8 MX4- TD3+ MDI1+ TXD[3] ETH_TXD[3]
VCCsol FANH
4 MX3+ MD3- MDI1- TXD[2] ETH_TXD[2]
FANL +24V VCC_FAN 4 4 VCC_FAN VCC_FAN 1
5 MX3- TCT3 TXD[1:0] ETH_TXD[1:0]
FAN_LOCK 3 3 FAN_LOCK GND 2
3 MX2+ TD2+ MDI2+ TXCTL ETH_TX_EN
TNR_LED_VCC 2 2 TNR_LED_VCC LOCK 3
6 MX2- MD2- MDI2- MDC ETH_MDC
LEDIN LEDOUT S0V 1 1 PGND
1 MX1+ TCT2 MDIO ETH_MDIO
TNRLED_CTL
2 MX1- TD1+ MDI3+ TXC ETH_TXCLK
MD1- MDI3- RXCTL/PHYAD2 ETH_RX_DV
TCT1 RXD[3] ETH_RXD[3]
FAN_LOCK_MAIN
RXD[2] ETH_RXD[2]
RXD[1:0] ETH_RXD[1:0]
1 +3.3V_E THM_EDGE 7 7 THM_EDGE
NC 2 +3.3V_E 6 6 +3.3V_E AI6 (THM_E)
3 THM_EDGE THM_CENTER 5 5 THM_CENTER AI7 (THM_C)
+3.3V_C 4 4 +3.3V_C
LED_VCC 3 3 LED_VCC
1 +3.3V_C SGND 2 2 SGND
2 THM_CENTER SEN_EJECT 1 1 SEN_EJECT HT_LIMITN
SEN4
NC 1-3 10-12 NC
+24V VDD24 1 4 9
S0V 2 5 8
+24V
+5.3V
UART_RX MAIN_RXD 3 6 7
SOL_CLT3 RST 4 7 6
DCDC VDD11
UART_TX MAIN_TXD 5 8 5
REVIO5 Timing 6 9 4
N DCDC
+3.3V VDD3 7 10 3
+3.3V
NC 11 2 NC
L1 +24V VDD33
SENSOR_LED NC 12 1 NC
VDDIO33
DCDC
+1.5V DPAVDD33
(DDR3)
+3.3V VCC VM +24VF
DCDC VSS
MD2_STEP STEP
L1 1
MD2_DIR DIR
NC 2
HYPNOS
N 3
+3.3V CPU_VOL CPURST
MD2_USM0 USM0
VDD REVOUT2 SEN5
MD2_USM1 USM1
ZC_IN XIN 32.768kHz RSTICN
XOUT
SCL SCL0
A A 1 1 A
AC_DIRECT_VDD 11 13 AC_DIRECT_VDD SW_ONOFF OFFACT_IN0 SDA SDA0
/A /A 2 2 /A
OFF_MODE 10 12 OFF_MODE REVOUT1
B B 3 3 B
HEATER_ON
11 11 HEATER_ON HT_HEATON0N
/B /B 4 4 /B
D_SLEEP 10 10 D_SLEEP D_SLEEP
ZERO_CROSSn 9 9 ZERO_CROSS_N HT_ZEROXN
RELAY_GND 8 8 RELAY_GND HT_RLYOFF0N
RELAY_24V
7 7 RELAY_24V HT_RLYOFF1N
MD2_VREF VREF ISENA
L1 L1 GND 6 6 S0V
ENABLEN ISENB
FG GND 5 5 S0V
SOL_CLT4 SLEEP
N N +24V 4 4 VDD24 +24V REVIO2
+24V
3 3 VDD24M +24VM
+24V 2 2 +24VF
LED_3.3V
VDD3 1 1 VDD3
GND 1 1 S0V
S0V 2 2 S0V
SWCLK
(STACK SEN) AI1 SEN_STACK 3 3
MPDS
BR_TSTCLK
BR_TSTMODEN
S0V 1 1 S0V
VB1LOCKN
LED_3.3V
LED_VCC 2 2 LED_VCC
VB1HTPDN
(PAPER REMAIN) REVIO3 SEN 3 3 SEN_STACK
HVPWM_DCLN1
SEN8
RMTB_SLEEP
PANEL5
HUMID_P HUM_P_PWM 3 3 HUM_P_PWM
PCIE_RX_N
(HUM) AI10 HUM_SEN 2 2 HUM(AD)
PCIE_RX_P
HUMID_N THM_GAIKI 1 1 THM(AD)
PCIE_TX_N
(THM_GAIKI) AI9
PCIE_RX_P
PCIE_REFCLK
PCIE_PERST_N
SEN7
PCIE_WAKE_N
+1.17V DVDD11PCI
+1.17V AVDD11PCI
+3.3V AVDDHIPCI
AGNDPCI
VTEST
TMODE[4:0]
TESTIO[1:0]
FPEN
DCIS_SCK
DRVVDD33 +3.3V
DCIS_SDIO
DRVVDD11 +1.17V
DCIS_TCLK_P
DRVVSS
DCIS_TCLK_N
RLVVDD33 +3.3V
DCIS_RCLK_P
RLVVDD11 +1.17V
DCIS_RCLK_N
RLVVSS
DCIS_RX0_P
DCIS_RX0_N
DCIS_RX1_P
REVIO4
DCIS_RX1_N
DCIS_RX2_P
DCIS_RX2_N
DCIS_TCLK_BS_P
DCIS_TCLK_BS_N
DCIS_RCLK_BS_P
DCIS_RCLK_BS_N
DCIS_RX0_BS_P
DCIS_RX0_BS_N
DCIS_RX1_BS_P
DCIS_RX1_BS_N
DCIS_RX2_BS_P
DCIS_RX2_BS_N
VR
Connector
Rear_Cover sensor
MP solenoid
T1 pickup clutch
Develop clutch
BD Sensor
LD
Paper feed motor
Main FAN
Front cover sensor
Chute GND plate
DR
IV
E
R
USB
Function
(TypeB)
Rs
+3.3V
+3.3V
DDR3-SDRAM
(Max 4Gb)
Toner amount detection sensor PCB
LD
Relay Front PCB
+24V
Mo
to
r D
R
IV
E
R
+24V
Thermistor of internal
LED_3.3V
(Sensor LED)
LVDS
LVDS
10/100 base Ethernet
+3.3V
AD
R
[1
2
:0
]
+1.5V
+1.5V
USB/Syste m
Polygon
Motor
Laser unit
Spring
Registration clutch
SOLT
SOLR
Rs
+3.3V
VR
Toner amount
SerialFLASH
(ROM1)
SerialFLASH
(ROM0)
VREF
CHG
DEV
SR
GRID
DCLNA
DCLNB
TR
KK
y
b
e
le
10/100/1000 base
Ethernet
+1.5V
+3.3V
+3.3V
U
V
W
+24V
+24V
No
t U
se
5V
R
E
G
./
1
V
D
C
D
C
(Front Cover)
LED_3.3V
+3.3V
(ASIC:IOH=9mA)
PHY
PHY
Eject
Motor
Mo
to
r D
R
IV
E
R
Eject motor
LT
INLET
HEATER_ON
Relay
Connector
Halogen-Heater
Thermostat
LVPS
+1.17V
(ASIC)
+1.17V
+24V
Vref
Vref
+3.3V
+3.3V
+3.3V
LED_3.3V
EJECT
M
VBUS(detect)
USB
Host
(Type A)
Wireless
LAN PCB
SDIO
USB FCT
Ether
Stack sensor PCB
HUMID
THM
Optional Lower Tray /
Optional Tower Tray
DDR3-SDRAM
(Max 4Gb)
VREF
+1.5V
+1.5V
+24V
Panel
rear
MAIN PCB
25MHz
RMII
PULSE
RGMI
+5.3V
+3.3V
+3.3V
Fuser Unit
+3.3V
ERASE LAMP
25MHz
LD
USB
Host
(Type A)
front
First side
C
IS
unit
Second side
C
IS
unit
REG.
AFE
+ LED DRV
Duplex scan model only
AFE
+ LED DRV
St
e
ppi
n
g
M
o
t
Dr
iv
e
r
SPEAKER
Modem PCB
+3.3V
Speaker AMP
LINE
EXT
DAA
V34
MODEM
Codec
+24V
M
M
FB motor
Document scanning
Document detection
ADF cover sensor
ADF motor
EEPROM
M
DC
M
o
t
Dr
iv
e
r
St
e
ppi
n
g
M
o
t
Dr
iv
e
r
S
e
le
n
e
Panel PCB
+5.3V
LCD Relay PCB
3.7inch
+1.2V
N FC
M odule
+5.3V
+3.3V
+3.3V
+3.0VP
+5.3V
LCD
+5.3V
Touch panel
KEY PCB
Scanning Speed 28/24ipm model only
Scanning Speed 50ipm model only
NFC model only
Printing Speed 46/50ppm model only
10/100 base Ethernet model only
10/100/1000 base Ethernet model only
FG
Y+
M
+3.3V
CLK
SEN_STACK
EJECT Sensor PCB
Low-voltage
Power Supply PCB
Zerocross
Detecting
circuit
AC/DC
Power IC
2
4
V
control
circuit
VDD24F
+5.3V
sensor
position
sensor
ADF motor
model only
NFC PCB
PCB
Wire
MP paper empty sensor
Paper feed sensor
Registration front/
rear sensor PCB
High-voltage
power supply PCB
detection
sensor
New toner
sensor
(light emission)
Registration roller
Paper empty sensor PCB
External temperature/
humidity sensor