HP LaserJet 4 Service Manual - Page 440

lower cassette assemblies removal 6-44 assembly 5-4 drive motor (M3) 5-10 functional check 7-24 installing 3-44 paper loading 3-45 pickup motor 7-24 pickup motor removal 6-45 sensor board removal 6-44 tray switches 5-9 LPT1 3-31 M M1, main motor 5-10 M2 functional test 7-23 M2, paper feed motor 5-10 m3 lower cassette drive motor 5-10 lower cassette pickup motor 7-24 M4, envelope feeder drive motor 5-10 M5, scanner motor 5-11 machine status 5-2 Macintosh 3-18 main motor (M1) 5-10 assembly removal 6-37 drive 5-2 drive system 5-10 failure 7-33 functional checks 7-33 functional tests 7-33 signals 5-10 maintenance 4-1 procedures 4-11 malfunction, fuser 7-29 MANUALLY FEED 7-B measuring d.c. voltages 7-69 media specifications 2-3 memory 3-53 size 3-26 memory configuration menu B-21 Memory Enhancement technology (MEt) 3-17 MEMORY FULL 7-B MEMORY LOW 7-B MEMORY SETTINGS CHANGED 7-B memory-induced messages 7-10 message, TONER LOW 4-10 microswitch (SW603) 7-15 (SW604) 7-15 (SW605) 7-15 signals 5-8 MIO 3-26, 3-40, 7-56 menus 3-26 MODE command 3-31 Index-4 MODE statement 7-53 model number 1-3, B-5 motor locations 7-61 MP Door Removal 6-12 MP pick-up roller clutch solenoid (SL2) 5-5 MP rollers, PM 4-3 MP tray empty sensor check 7-17 paper end sensor functional test 7-44 paper path 5-29 paper pickup rollers removal 4-11 removal 6-13 separation pad removal 4-11 MP/PC/LC LOAD Message 7-13 MS-DOS System configuration 3-31 version 4 and above 7-53 version 4 and below 7-53 MSDS, phone number 1-11 multifeed (41.3) 7-28 N networks, security 3-18 noisy vertical sync signal (41.1) 7-28 non-HP toner cartridge 4-9 Novell Networks, HP JetAdmin Utility 3-19 number model 1-3, B-5 Serial 1-3, B-5 NVRAM Init B-31 O OFFLINE 7-B operation basic sequence of 5-33 standard printer 5-33 options, installed status 3-26 ordering documentation 1-7, B-8 packaging material 3-43 output area paper jams 7-20 output assembly removal 6-41 overhead transparencies 2-6 ozone, safety 1-11 P pacing 3-34 packaging material part no. 3-43 packaging the printer 3-43 page count 3-24, 3-26 setting the 3-21 page protect 3-13 paper control pca removal 6-59 paper exit sensor removal 6-42