HP P2055 Manual

							Table 7-5  Rear-side components
ReferenceComponentDescriptionIf disconnected or blocked
1PS918Duplex reverse sensor flag (J208)
(HP LaserJet P2050 Series
Printers only)Control-panel message:  Jam in
output bin  appears.
2PS915Photosensor flag for fuser (J206)Control-panel message:  Jam in
output bin  appears.
3White leverWhen the rear door is closed, this
lever positions the photosensor
flag for the fuser (PS915) to
detect paper exiting the fuser. 
4 Reverse sensor assembly Detects paper during the
duplexing process (HP LaserJet
P2050 Series Printers only) 
Figure 7-7
  Components in the print cartridge cavity
12
Table 7-6  Print cartridge components
ReferenceComponentDescriptionIf disconnected or blocked
1PS912Top of page photosensor flag
(J203)Control-panel message:  Jam in
cartridge area appears.
2 PS913 Paper-width photosensor flag
(J203) Control-panel message: 
Jam in
cartridge area appears.
ENWW Tools for troubleshooting 199 
						

							Figure 7-8  Components on the top of the product
1
2
Table 7-7  Top components
ReferenceComponentDescriptionIf disconnected or blocked
1PS911Output bin media full sensorControl-panel message:  Output
bin full appears.
2 Flag Rotates to block sensor as the
output bin fills  
Figure 7-9  Components on Tray 1 and Tray 2
2
1
3
200 Chapter 7   Solve problems
ENWW 
						

							Table 7-8  Tray 1 and Tray 2 components
ReferenceComponentDescription
1FlagPhotosensor flag for Tray 1 paper present sensor
(PS916)
2FlagPhotosensor flag for Tray 2 paper present sensor
(PS914)
3 PS916 Photosensor (J205)
ENWW Tools for troubleshooting 201 
						

							Problem-solve diagrams
●Repetitive image defect ruler
●
Engine controller PCA
●
Major components
●
PCAs
●
General timing chart
●
Circuit diagram
Repetitive image defect ruler
Defects on product rollers can cause image defect s to appear at regular intervals on the page,
corresponding to the circumference of the roller that  is causing the defect. Measure the distance between
defects that recur on a page. Use the following table  or the repetitive-defect ruler to determine which
roller is causing the defect. To resolve the problem, tr y cleaning the roller first. If the roller remains dirty
after cleaning or if it is damaged, re place the part that is indicated in 
Table 7-9 Repetitive defects
on page 202.
CAUTION:Do not use solvents or oils to clean rollers. Inst ead, rub the roller with lint-free paper. If dirt
is difficult to remove, rub the roller with lint-free paper that has been dampened with water.
NOTE: The following table replaces the graphical repetit ive defect ruler. You can make your own ruler
by using these measurements. For the most  accurate results, use a metric ruler.
Table 7-9  Repetitive defects
ComponentDistance between defects
Primary charging roller38 mm (1.5 in)
Transfer roller39 mm (1.54 in)
Developer roller42 mm (1.65 in)
Registration roller43 mm (1.69 in)
Fuser film57 mm (2.24 in)
Pressure roller63 mm (2.48 in)
Photosensitive drum 75 mm (2.95 in)
202 Chapter 7   Solve problems ENWW 
						

							Engine controller PCA
Figure 7-10  Engine controller connectors
J102
J101
J215
J202
J207
J211
J208
J581
J205 J204
J203
J206 J210
J213
J201
J2142
J2141
NOTE: Control-panel messages appear on HP La serJet P2050 Series Printers only.
Table 7-10  Engine controller connectors
ItemDescriptionWhen disconnected
J101AC voltage to engine controllerNo AC voltage to engine controller
J102AC voltage to fuserNo AC voltage to fuser
J201Formatter PCA 
J202Main motor (M1)Control-panel message: Initializing... appears1
J203 Top of page (PS912)Control-panel message:  Jam in cartridge area
appears1
Media width sensors (PS913 )Control-panel message: Open door and clear jam
appears1
ENWW Problem-solve diagrams 203 
						

							ItemDescriptionWhen disconnected
J204Tray 2 paper present sensor (PS914)Control-panel message:Load paper appears1
J205Tray 1 paper present sensor (PS916)No message appears unless you request paper from
Tray 1.
J206Fusing assembly exit sensor (PS915)Product attempts to pull paper.
Control-panel message: Jam in cartridge area  or
Open door and clear jam   appear
1
J207Connecting PCAControl-panel message: Initializing... appears1
J208Duplex reverse sensor (PS918) (HP LaserJet P2050
Series Printers only)Print simplex, but not duplex.
J210Thermistor (TH1)Control-panel message:  Initializing... appears1
J211Optional paper feeder accessory (PS911) 
J213Media tray full sensor (PS911)Control-panel message:  Output bin full  appears1
J215Power switch LED (LED1001)The product stays on. You cannot turn it off.
J581Toner memory readerA page prints and then the control-panel message:
10.X Supply memory error  appears1
J2141Voltage in top cover switch (+24 V)No voltage to top cover switch
J2142 Voltage out top cover switch (+24 V) No voltage from top cover switch
1Control-panel messages appear on HP LaserJet P2050 Series Printers only.
Table 7-10  Engine controller connectors (continued)
204 Chapter 7   Solve problems ENWW 
						

							Major components
Figure 7-11  Major components
13
4
2
65
Table 7-11  Major components
ItemDescription
1Fuser
2Laser/scanner assembly
3Registration assembly
4Duplex feed unit (HP LaserJet P2050 Series Printers only)
5Duplex-drive-unit assembly (HP LaserJet P2050 Series Printers only)
Face-down-drive assembly (HP Lase rJet P2030 Series Printers only)
6Main drive unit
ENWW Problem-solve diagrams 205 
						

							PCAs
Figure 7-12  PCAs
Table 7-12  PCAs
ItemDescription
1Engine controller unit
206 Chapter 7   Solve problems ENWW 
						

							General timing chart
Figure 7-13  General timing chart
I. GENERAL TIMING CHARTTiming chart for two consecutive prints on letter paper
STBY
RTSL
TNIRP
RTNI
YBTS
TIAW
19
20 17
18 15
16
13
Tray 2 pickup solenoid (SL2)
14 Main Fan (FM1)
11
Transfer Charging Bias
12 Fusing Heater
9
Primary Charging Bias (DC)
10 Developing Bias
7
Main Motor (M1)
8 Primary Charging Bias (AC)
5
Laser Diode
6 BD Output signal (BDO)
3
Print start command (EEC12)
4 Scanner Motor Operation
1 TOP sensor (PS912)
2 Fusing delivery sensor (PS915)
Power switch ON
ENWW Problem-solve diagrams 207 
						

							Circuit diagram
Figure 7-14  Circuit diagramA
65 4 3
B
C D
SL
21
3456
21
123456
12
12
1234567
1234567
21
12
12
4 2 1
3 123
321
123 3211
23 23
1
3 21
3
12
1
2
3
1 2321
M12
3
45
23
1
54
12345
12345
12
3
45
2
121
12 12
MT112
21
2
1
END1
END2
12
MT2
123 321
123 321
321
123
321
123
321
123
123
321
42
13 321
321
4
123
1234
123
321
321
123
1110987654321
11 1 0 9 8 2 345
61
7
1
2
3
4
5
6
7
8
9
2345678
1910 11
11
10
98
23456
17
2018
16
1
23
45
67
89
10 11
13 15 17 19 21
12 14 2428
26
23 25 27
22
1 2 4 5 9
3 8
7
6 10 11
12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
1234567
1234567
123 321
123
421 3 1234
42
13
1234
1234
12
M
SL
12
12
1
2
3
4
5
6
7
8
9
10
11
13
12
1
2
3
4
5
6
7
8
9
21
123
321 123
123
SL21
12
12
1
2
3
4
5
6
7
8
9
12
12
12SL
M1Main motor
SW301
1
2
1
2
1
2
Laser Drive
 PCA
Scanner motorLaser scanner unit
MP tray
pickup solenoid Fuser heater
Thermoswitch Themistor
Fuser unit
Fuser film unit
Engine Controller PCA
PF
pickup solenoid
Paper feeder  (Option)
Main fan
1
2
1
2 1
2
1
2
Formatter
SW70
2
1
SW71
2
1
SW72
2
1
SW73
2
1
SW74
2
1
1
2
1
2
2
1
2
1
2
1
1
2
1
23
45
67
89
10 11 1 3
12
J73
J71J71F
LCD
J72
+3.3V
GND
LCD_D
ATA
FP_CLK
SR_D ATA
SR_NCS
LCD_NCS
FP_RSLD NRESET
FP_LED2 FP_LED1
J1M J1F
GND(DCOM)
/VDO2
VDO2
GND(DCOM)
VDO1
/VDO1
GND(DCOM)
CNT2
CNT1
CNT0 GND(5)(*) +5V(*) /BDI(*)
J3 J7
J801 J4M+24P1
MPSOL(*)
J4F
J802M J802F
M2
+24P1 GND
FANLOCK
J1105M
J1103M
/ACC /DEC GND
+24P1J1103F
FM1
J1105F J201
J207MJ207F
+3.3V
+3.3V
FANLOCK
DUPSOL
CSTSOL
GND
/DEC
/ACC
+24P1
N.C. +3.3V /BD0
/SC
/SCLK
/RST0
GND
GND
GND
GND
GND
GND
+3.3V
+3.3V
+3.3V
+3.3V N.C. /BDI
N.C.
/WDSNS
MPSOL
CNT0
CNT1
CNT2
GND
+5V
+3.3V
/PISNS
GND
+24P1 J912
J203M J203F
PS913
PS912
+3.3V
J206M J206F
GND
FSRTH
J915/POSNS GNDJ210M
J102MJ102F
J210F
PS915
J202M
ACN
ACH
J202F
J1202M
J1202F
MFG GND
/MACC
/MDEC
+24U+24V +24P1
J2142J2141
FT2 FT1
GND J215M
SWON
LED J1001
LED1001
SW1001
J215F
AC-N AC-H
FBJ101M J302 J101F
FT3
INL101
JP301
JP302
JP303
JP304
JP305
JP306
JP 111
JP112
DV
PR
TR
ANT
J211MJ211F
/SI
GND /SO /CLK
+24V /TESTP TAG2 TAG1
J581M
COILA
COILB
J581F
J1205F
J1205D
Operation panel (P2050 series)
LED1
LED2 FFC
Cassette
pickup solenoid
CSTSOL(*)
J1104M
+24P1
J1104F
SL2
SL1 TP
J4
H1
TP1 TH1
+3.3V
J205M
J205F J916
/MPSN
S
GND
PS916
+3.3V
J204M J204F J914
/CSTSNS
GND
PS914
+3.3V
J213MJ213F J911
/FULSNS
GND
PS91
1
LEDDRV
J1203MJ1203F J1204
OPTSNS
GND
PS1201
OPTSLON
J1202M
+24V
J1202F
SL4
FFC
FFC
J1201
J951
SW951
SW952
LED951
LED954 LED952
LED955
Operation panel (P2030 series)
LED953 LED956
Door switch
Power switch
Fuser delivery
 sensor
Cassette
media
presence sensor
Media full
sensor Media widt h
sensor
Top sensor
PF intermediate PCAPF media
feed sensor
Connecting PCA
J2100
J208M
+3.3V
GND
/DUPSNS
J208F
PS918Duplex reverse
sensor
J911
J1M
J1F
BD sensor
P2050 series only
MP tray
media
presence sensor
P2050 series only
Duplex reverse solenoidJ1101MJ1101F
DUPSOL(*)
J1102
+24P1SL3
208 Chapter 7   Solve problems
ENWW