HP 4 Plus Manual

Figure A-26a Duplex Switchback Assembly (1 of 2)
Duplexer   A -35 

Figure A-26b Duplex Switchback Assembly (2 of 2)
A -36  Duplexer  

Ref Part # NotesDescription
1 RA2-2083-000CN LJ4+/5 Static Eliminator
2 RA2-2087-000CN LJ4+/5
Deflector Linkage
3 RA2-2094-000CN LJ4+/5 Upper Feed Guide
4 RA2-2095-000CN LJ4+/5 Lower Feed Guide
5 RA2-2112-000CN LJ4+/5 Cable Cover
6 RA2-2116-000CN LJ4+/5
Stepped Screw 3 By 6.9 (Qty 2)
7 RA2-2119-000CN LJ4+/5 Paper Deflector
8 RF1-3806-000CN LJ4+/5 Holding Tray Linkage
9 RF1-3808-000CN LJ4+/5 Switchback Solenoid (SL1)
10 RF1-3811-000CN LJ4+/5
Paper Feed Guide
11 RA2-2118-000CN LJ4+/5 Paper Roller Shaft
12...

Ref Part # NotesDescription
25 RS1-0591-000CN LJ4+/5 Gear 39T/22T (Qty 2)
26 RS1-0592-000CN LJ4+/5
Gear 29T/54T
27 RS1-2408-000CN LJ4+/5 Switchback Tension Spring
28 RS1-2410-000CN LJ4+/5 Deflector Tension Spring
29 RS1-7009-000CN LJ4+/5 Switchback Hinge Pin
30 WG8-5210-000CN LJ4+/5
Photo Interrupter (PS1)
A -38  Duplexer  

B
LaserJet 5/5M/5N Printer
The Combined Service Manual contains information to be used
with the LaserJet4/4+/4M/4M+/5/5M/5N.  In special
circumstances, the information in Chapters 1 and 3 will not
pertain specifically to the LaserJet 5/5M/5N printer (such as the
control panel information).  This Appendix contains the
information that is specific for the LaserJet 5/5M/5N printers.  
The Product Information shows feature comparisons of the
LaserJet 5/5M/5N with the LaserJet 4+/4M+ and a product...

Product Information
Features HP LJ 4+  HP LJ4M+  HPLJ5 HPLJ5M HPLJ5N
ModelC2037A C2039A C3916A C3917A C3952A
Printer Speed 12 ppm 12 ppm 12 ppm 12 ppm12 ppm
Resolution 300/600 dpi 300/600 dpi 300/600 dpi 300/600 dpi 300/600 dpi
Expandable I/O
Buffer Yes
Yes Yes Yes Yes
Resource
Savings Yes
Yes Yes Yes Yes
MEt YesYes Yes Yes Yes
REt YesYes Yes Yes Yes
Languages Enhanced PCL5Enhanced
PCL5,
Postscript Level 2 HP PCL 6 HP PCL 6,
Postscript Level 2 HP PCL 6
PostScript
Upgradeable C3129A* N/A
C3918AN/AC3918A...

Product Family Information
The model HP C3916A, C3917A, and C3952A are very similar
from a hardware service standpoint. The models HP C2039A and
C3917A printers add the following features:
•PostScript Level 2 SIMM
•AppleTalk MIO Card
•4 MBytes of RAM (2 MBytes for the C3917A)
The model HP C3952A adds a 10-baseT MIO card to the base
C3916A printer.
In every instance the repair procedures for all LaserJet 4+ and
LaserJet 5 printers products are very similar.
Some LaserJet 4+ accessories are compatible with...

Accessory Description Work in theLaserJet 4?Work in the
LaserJet 4 Plus? Work in the
LaserJet 5?
C2082A Envelope Feeder  Yes NoNo
C2082B Envelope Feeder  YesYes No
C3927A Envelope Feeder  NoNoYes
C2083A Optional 500 Sheet Feeder Assembly  Yes
NoNo
C2083D Optional 500 Sheet Feeder Assembly  Yes Yes  No
C3921A Optional 500 Sheet Feeder Assembly  No
NoYes
C2085A 250 Sheet Universal PC tray Yes No
No
C2085D 250 Sheet Universal PC tray No Yes
No
C3924A 250 Sheet Universal Tray 2 No
NoYes
C2080A PostScript...

Identification    
The model number is on a label placed on the outside, rear cover
of the printer. The model number (C3916A, C3917A, or C3952A)
is found at the top of the label. The model number is the base
number for all printers.  
The serial number contains information about the printer. The
serial number Alpha section refers to the Country of Origin, the
Revision Level and the Production Code.  The Numeric section
refers to the production number of the printer. See the following
for information...

Specifications 
HP LaserJet 5 / 5M / 5N 
DimensionHP LaserJet 5
Width 16.4 in (415mm)
Depth 15.9 in (403 mm)
Height 11.7 in (297 mm)
Weight (with toner cartridge) 37 lbs. (16.8 kg)
Table B-3Printer Dimensions
VoltsFreq Watts (typical)
Printing Standby PowerSave
100 Vac  ± 10%
120 Vac  ± 10% 50/60 Hz 
± 2 Hz
50/60 Hz  ± 2 Hz 290
290
100
10018-24
18-24
220 Vac  ± 10%
240Vac  ± 10% 50/60 Hz 
± 2 Hz
50/60 Hz  ± 2 Hz 290
290
100
10018-24
18-24
Table B-4Power Specifications
B-6 LaserJet 5/5M/5N Printer