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General Information
This service guide contains information useful for troubleshooting, repairing, adjusting, and maintaining a Tektronix Phaser® 740 and 740L Color Printer. This manual includes troubleshooting guides, adjustment procedures and a field replaceable units (FRU) list. Topics such as printer theory of operation, detailed removal/replacement procedures, configuration page details, and verifying printer operation are located on the companion Color Printer Service & Support Resources CD-ROM. To ensure a complete understanding of the product, we recommend participation in Phaser 740 service training.
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The Phaser 740 Color Printer
Service Guide
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The Phaser 740 Color Printer
The Phaser 740 Color Printer combines a color laser, continuous-tone print engine with an image processor supporting Adobe's PostScript Level 3 page description language. The image processor features a bi-directional parallel interface and a 10baseT Ethernet port for host communication. Optional network adapter cards to the image processor allow the printer to communicate on networks using LocalTalk, Ethernet 100baseT or Token Ring protocols. The Ethernet network card supports EtherTalk 100baseT, Novell and TCP/IP. With the Token Ring network card, the printer supports Token Ring protocols. With 32 Mbytes of RAM installed, the printer supports the color PCL5C printer language too. The printer is available in four configurations:
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The Phaser 740L is a monochrome version of the printer which can easily be customer-upgraded to be a color printer. It prints at a resolution of 600 x 600. It is equipped with 16 Mbytes of RAM which can be supplemented with an additional RAM DIMM. The printer contains 136 standard, built-in fonts. The Phaser 740L is identical to the Phaser 740 except is set to only use a black toner cartridge. It features a removable plate which blocks out the locations of the color cartridges. The Phaser 740 Base comes standard with 32 Mbytes of RAM which can be supplemented with one or two additional 16-, 32-, 64- and 128-Mbyte RAM DIMMs; maximum usable capacity is 80 Mbytes. The printer contains 136 standard, built-in fonts. The printer contains 136 standard, built-in fonts. The Phaser 740 Base prints at a resolution of 600 x 600 dots-per-inch. The Phaser 740 Plus includes 32 Mbytes of additional memory (64 Mbytes total) and a SCSI interface board. The presence of the SCSI board (and the extra memory) enables the printer to print at higher resolutions 1200 x 1200 (Premium mode) dots-per-inch and also support image pipelining for greater throughput, a print collation mode, and a "check print before proceeding with job" mode. The printer contains 136 standard, built-in fonts. The Phaser 740 Extended (a factory-only option) features a different ROM SIMM than the other printers. It includes 128 Mbytes total memory, SCSI port, 1200 x 1200 color printing, check print mode, print job collation (requires hard drive), copystation support and print pipelining.
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The color printers support a 5.3 page-per-minute, composite-black printing "Fast Color" mode which prints at 600 x 600 dpi using three passes, cyan, magenta and yellow, to produce an image instead of the usual four passes, cyan, magenta, yellow and black. Each printer also features "Presentation" mode printing in which a paper print is printed with the color settings of a transparency print. Presentation mode produces the smoothest and brightest large-area fills. The printer prints in monochrome at 16 prints-per-minute.
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Phaser 740 Color Printer
Print speeds depend on the chosen resolution and selected media. For resolutions of 600 x 600 (standard), in color, the printer prints at 4 pages per minute (ppm) on paper. Monochrome printing (Fast Monochrome) is at 16 ppm on paper. Transparency film printing is always 2 ppm. For 1200 x 1200 (premium) dpi color printing, the printer color prints at 2 ppm. Monochrome printing is at 8 ppm. The printer prints 600 x 600 dpi, composite black (CMY) draft prints at a rate of 5.3 pages-per-minute. The plus and extended features option includes a SCSI-compatible interface to connect to an external hard disk drive for additional font storage. The hard disk drive is also required for print collation of multiple copy multi-page prints. A copy unit can also be connected to the printer's SCSI port to give the printer the ability to optically copy color images. An factory-only, internal IDE hard drive can be installed in the printer in place of the network card. The printers support printing on A-, A4- and Legal-sized paper and transparency film from separate A or A4- or Legal-size trays. An optional two-tray second feeder (called the Lower Tray Assembly) is available. The printer features a built-in multi-purpose tray from which specialty media, cardstock and envelopes can be fed. The printer also supports manual feeding using the multi-purpose tray. An optional auto-duplex unit allows the printer to automatically create double-side prints. The duplex unit takes the place of the main (top) tray. The duplex unit requires using the optional two-tray second feeder as a paper source. The duplex unit upgrade kit includes the optional two-tray feeder. When printing double-sided, print times are generally doubled. Double-sided monochrome printing is at 4 ppm, doubleside color at 2 ppm. After being idle for the selected amount of time the printer switches into its Energy Star mode where it consumes less than 45 watts of power. It "awakens" upon receiving data at any of its ports.
Service Guide
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RAM and printer capabilities
The printer features two DIMM connectors which accept both 16-, 32-, 64-, and 128Mbytes RAM DIMMs. The printer can use off-the-shelf RAM meeting these specifications:
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168-pin DIMM Synchronous DRAM 3.3 volt 9 nsec speed Valid on-board Serial Presence Detect ROM.
The Configuration Page lists the amount of installed RAM and the details; such as type, parity, size, and manufacturer, about the DIMM installed in each slot. Upon power-up, the image processor interrogates the 256 byte Serial Presence Detect ROM which describes the DIMM with details such as data width, clock delay, number of address columns and row, refresh rate and more. If the DIMM does not meets the required specifications it will be ignored; no error message will be reported. With more memory the printer gains the capabilities of printing at higher resolutions, printing without having to use image compression (which trades off less installed RAM for longer image processing time) and dual frame buffers for printing one image while processing a second image (which gives greater printing throughput). With additional RAM memory the printer's capabilities increase as detailed in the following table:
Installed RAM and printer capabilities
Feature 600 x 600 dpi 1200 x 1200 dpi Pipelining Frame buffer 1 Letter size image with compression 1 Letter size image with no compression 16 Mbytes Color/mono Black and white only 32 Mbytes Color/mono Black and white only 64 MBytes Color/mono Color and black and white Yes, if SCSI board installed 2 Letter-size images with compression Yes, if SCSI board installed Yes, if SCSI board installed 80 Mbyte Color/mono Color and black and white Yes, if SCSI board installed 2 Letter-sized frame buffers with no image compression Yes, if SCSI board installed Yes, if SCSI board installed
Check print Collation (requires hard drive)
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Phaser 740 Color Printer
Print the Configuration Page and check the item "installed RAM" to see what type of RAM is installed. For example: Installed RAM: 96 Mbytes Mem slot 1: SDRAM/parity/64 MB/KMM366S824AT Mem slot 2: empty This is a list of DRAM SIMMs that are branded for use by Tektronix at the time this guide was published: Size 16 Mbyte 32 Mbyte 32 Mbyte 64 Mbyte 64 Mbyte 128 Mbyte 32 Mbyte 64 Mbyte 32 Mbyte 64 Mbyte 128 Mbyte 16 Mbyte 32 Mbyte 32 Mbyte 32 Mbyte 64 Mbyte 64 Mbyte 64 Mbyte 128 Mbyte Maker Samsung Samsung Samsung Samsung Samsung Samsung Smart Module Smart Module NEC NEC NEC Micron Tech. Micron Tech. Micron Tech. Micron Tech. Micron Tech. Micron Tech. Micron/Crucial Micron Tech. Part Number KMM366S203BT KMM366S403BT KMM3665403CTL-G0 KMM366S824AT KMM3665823BTL-G0 KMM366S1623AT SM564043574N6AA SM564088574N6AA MC-454AD645F-A10B MC-454CB645FA-A10B MC-4516CD645FZ-A10B MT8LSDT264AG-66CL2 MT16LSDT264AG-10BC4 MT16LSDT264AG-662C1 MT16LSDT464A6-662xx MT8LSDT864AG-662D3 MT8LSDT864AG-10BD2 CT8M6454D10-MBT66LP MT16LSDT1664AG-662DT
Service Guide
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Print engine assemblies
Main charger corona unit Pre-exposure lamp Ozone filter Toner level sensor board Laser scanner
Imaging unit Paper feeder
Black toner cartridge Cyan toner cartridge Magenta toner cartridge Yellow toner cartridge Pre-transfer lamp
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Paper tray Fuser
Toner cartridge selector/paper exit unit (right door)
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Print engine major components
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Phaser 740 Color Printer
Toner cartridge motor Power supply unit
Toner cartridge Ozone fan drive unit Laser driver board
High voltage board Image processor board
Engine control board
Fuser fan Cleaning board Paper feed motor Main motor Temperature/humidity sensor board Interconnect board Lower door open sensor
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Print engine components (continued)
Service Guide
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Accumulator belt Toner level home position sensor sensors (transmitters) Multi-purpose tray feed sensor
Main charge grid (Scorotron charger) sensor Toner level sensors (receivers) are mounted inside the toner cartridge driver unit
Front right door opened switch Transfer roller position sensor Left door opened switch Fuser-exit sensor
Output tray full sensor Power switch Aligning sensor Paper tray type sensors Paper-empty sensor Paper-exit sensor
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Print engine sensor, switch and solenoid locations
The photoconductive belt position sensor is not illustrated. This optical sensor marks the home position of the photoconductive belt. It is mounted inside the customerreplaceable imaging unit.
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Phaser 740 Color Printer
The image processor board
RAM DIMM 2 RAM DIMM 1 PostScript code ROM DIMM CPU Network Card
Font ROM DIMM
NV RAM Boot ROM
Image processor board
SCSI riser board Features of the image processor board
Real Time clock
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Service Guide
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Front panel
These front panel features are found on the printer:
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A two-line, 24-character LCD and two LEDs Four push buttons
LCD The LCD serves two purposes: displaying current image processor and print engine status information and displaying an interactive menu. Status information includes image processor status such as Ready, Receiving data and Printing. Print engine status includes messages such as Out of paper, Paper Jam, and Out of Toner. The interactive menu can only be entered while the print engine and image processor are idle. The interactive menu allows the user to review and change certain NVRAM, I/O ports and peripheral parameters. Buttons Button 1, the left-most button labeled the Exit key, cancels an operation while in the interactive menu. The functions of Buttons 2, 3 and 4 are defined by the particular menu or function being displayed on the LCD display. The bottom row of the LCD labels the current function of each button.
In addition, pressing the buttons as you turn on the printer enables certain diagnostic modes:
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Pressing and holding Button 1, as you turn on the printer, skips power-up diagnostics (except for a brief kernel test) and proceeds to PostScript startup. Pressing and holding Button 3, as you turn on the printer, executes interactive service tests. Refer to "Service tests" on page 57.
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The topic, "Resetting NVRAM" on page 67 explains how to use the front panel buttons to reset the printer's NVRAM to its factory default values.
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Phaser 740 Color Printer
LEDs The Power LED indicates the printer has +5 VDC available for its logic control boards.
The Error LED has three meanings:
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Off indicates that no errors have been detected. On indicates a warning to the user. An explanatory message, such as Low Toner, is displayed on the LCD. Blinking indicates an error has been detected. An error message, such as, Paper Jam at Output, is displayed on the LCD.
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Power Error Exit
Button 1 Button 2 Button 3 Button 4
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The front panel
Service Guide
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Rear panel
Connectors
The rear panel of the printer features the host interface connectors:
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Bi-directional parallel (high-density connector). Twisted Pair10baseT Ethernet connector. RX indicator (green); blinks while the network card is receiving data. The LED is off steady while no data is being received. If the LED is on steady, then a problem (probably hardware) has occurred at the network hub. SCSI high-density connector (external hard disk drive or optical scanner only).
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With the addition of a network card, the printer can feature either of these groups of connectors:
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ThinNet (100base2) and Twisted Pair (100baseT) Ethernet connectors. RX indicator (green); blinks while the network card is receiving data. The LED is off steady while no data is being received. If the LED is on steady, a problem (probably hardware) has occurred at the network hub. LocalTalk connector. Unshielded Twisted Pair (10baseT) and shielded Twisted Pair (DB-9) Token Ring connectors.
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Network card LEDs
The Ethernet network card has two LED indicators:
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TX indicator (yellow); blinks while data is transmitted to the host. The LED is off while no data is being sent. Twisted Pair (100baseT). RX indicator (green); blinks while the network card is receiving data. The LED is on steady while no data is being received. If the LED is off steady, then a problem (probably hardware) has occurred at the network hub. ThinNet (100base2). RX indicator (green); blinks while the network card is receiving data. The LED is off steady while no data is being received. If the LED is on steady, then a problem (probably hardware) has occurred at the network hub.
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TP Link. On steady indicates good circuit to nearest port; off indicates no circuit. 100 MBS. Ethernet speed is 100 MBS when lit. Do not use both Ethernet connectors at the same time. With a Ethernet or Token Ring network card installed, the built-in 10baseT port is disabled. Phaser 740 Color Printer
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Note
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The Token Ring network card has two LED indicators:
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Connection (yellow); off when the printer is not inserted into the Token Ring, blinks while the printer is attempting to insert itself into the Token Ring, on when the printer is properly inserted in the ring. Ring Speed (green); off when the card is set for 4 megabits-per-second (MBPS), on when the card is set for 16 MBPS. When both LEDs blink, a network card failure has occurred.
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The printer also support an internal IDE hard drive in place a a network card as a part of a factory installed option.
Slot for network card or IDE hard drive 10baseT Ethernet
LocalTalk®
16 Mbs RX
10Base2
INS STP UTP
TP LINK
100 Mbs
10/100Base-TX
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RX
PhaserShareTM Series B LocalTalk Card
TX
Ethernet card SCSI Parallel
LocalTalk card
Token Ring card
PhaserShareTM Series B Token Ring Card
PhaserShareTM Series B Ethernet Card
RX
TX
IDE Internal Hard Drive
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The Phaser 740 rear panel
Test print button
In the center of the rear cabinet panel is the test print button. Pressing this button while the printer is idle causes the print engine to print a built-in test print. The print consists of a field of thin horizontal lines. The print is made independently of the image processor board. Hold in the test button for at least 4 seconds before releasing, or until you hear the print process begin. The print demonstrates that the print engine can print (independently of the image processor); it has no use for determining print quality.
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The Test Print button will not make a test print if the auto-duplex unit is installed since the Test Print function defaults to the upper tray.
Service Guide
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Health LED
A health LED indicates the status of the image processor board. The health LED is mounted on the image processor board and is viewable through a small hole in the rear panel. Once the PostScript code is loaded into memory and the image processor is initialized and running, the image processor blinks the LED at a one-second rate.
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Blinking (at a steady rate): The printer is operating normally. The LED blinks irregularly during power-up self-diagnostics. If a soft error occurs, the image processor board operates, but at a reduced capacity. Soft failures include failure of expansion memory DIMMs or any of the interface ports. When a soft error occurs, the printer automatically prints a startup page listing the error.
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On or Off: A hard error condition has occurred that would keep the image processor board from operating.
Media tray type sensing
The combinations of the three tray sensors "tell" the print engine what type of tray is installed. The tray sensors are located on the left-side interior of the paper tray slot. Sensor actuators are attached to the bottom end of the tray to close the appropriate sensor. There are six tray types:
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Letter (A-size) paper Letter (A-size) transparency film Metric Letter (A4-size) paper Metric Letter (A4-size) transparency film Legal-size paper Auto-duplex unit
Tray switch sensor combinations
Left switch Closed Closed Open Open Open Closed Middle switch Open Closed Open Closed Closed Open Right switch Open Open Closed Closed Open Closed Tray type Letter (A-size) paper Letter (A-size) transparency film Metric Letter (A4-size) paper Metric Letter (A4-size) transparency film Legal size paper Auto-duplex unit
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Phaser 740 Color Printer
Sensor actuators Middle Left Right
Tray sensors
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Tray switch sensors and actuators
Service Guide
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Specifications
Physical dimensions
Dimensions Height: Width: Depth: Weight: Specification 46.3 cm (18.2 in.) With Lower Tray Assembly: 68.6 cm (27 in.) 50.73 cm (20 in.) With output tray: 78.2 cm (30.8 in.) 49.2 cm (19.4 in.) Approximately 47.5 kgs (104.6 lbs.) with consumables installed. Approximately 31.9 kgs (70.2 lbs.) without Lower Tray Assembly.
Printer clearances
Clearances Top: Left: Right: Front: Rear: Bottom: Mounting surface flatness: Specification 7.6 cm (3 in.) 7.6 cm (3 in.) 10.2 cm (4 in.) for handling the paper tray Unlimited for removal of consumables 15.3 cm (6 in.) for connecting computer cable and power cord No obstruction under printer that could block its cooling vents. Within 2 degrees of horizontal with all four feet in contact with the table surface.
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Phaser 740 Color Printer
Functional specifications
Characteristic Printing process Color medium Specification Electro-photographic, four color (CMYK) transfer printing Four toner cartridges each contain one of four colors: cyan, magenta, yellow or black. The toner is a nonmagnetic, monocomponent contact medium. Standard, Fast Color and Presentation mode: 600 x 600 dots-per-inch text and graphics Premium mode: 1200 x 1200 dpi text and graphics Time from paper-load to paper-eject for continuous A, A4 printing: Four-color 4 pages per minute at 600 dpi paper: 2 pages per minute at 1200 dpi Monochrome: 16 pages per minute at 600 dpi 8 pages per minute at 1200 dpi Time from paper-load to paper-eject for continuous Legal printing: Four-color 2 pages per minute at 600 dpi paper: 1 pages per minute at 1200 dpi Monochrome: 8 pages per minute at 600 dpi 4 pages per minute at 1200 dpi Four-color transparency: 2 pages per minute Fast color, three-color (CMY): 5.3 pages per minute at 600 dpi Print times do not include image processing time, which can vary depending on image complexity. A-size: Left and right 4 mm (0.15 in.), Top 5 mm (0.2 in.), Bottom 5 mm (0.2 in) A4-size: All sides, 5 mm (0.2 in.) Legal-size: Left and right 4 mm (0.15 in.), Top 5 mm (0.2 in.), Bottom 5 mm (0.2 in) Tray: A-size (letter), A4-size (Metric letter), Legal premium Bond laser printer or copier paper Tray feed paper weight: 60 to 90 g/m2 (16 to 24 lb.) Multi-purpose tray: 89 x 254 to 216 x 356 mm (3.6 x 10 to 8.5 x 14 in.) #10 Envelope of a good quality. Tektronix transparency Tektronix Glossy Coated paper Multi-purpose tray paper weight: Cover Stock up to 163 g/m 2 (60 lb) Index Stock up to 163 g/m2 (90 lb) Only A and A4 transparency film is supported Duplexing: 75 to 90 g/m2 (20 to 24 lb) Paper tray capacity 250 sheets using 20-lb. paper. 100 sheets of transparency film. The optional Lower Tray Assembly also uses trays with the same capacity.
Addressability
Printing speed (A, A4, Legal paper)
Minimum printing margins
Usable paper
Service Guide
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Electrical specifications
Characteristic Primary line voltages Primary voltage frequency range Power consumption Specification 90 to 132 VAC (115 VAC or 100 VAC nominal); 198 to 264 VAC (220 VAC nominal) 50 to 60 Hz 130 watts (fuser off), 850 watts (fuser on) during Ready state, 950 watts during warm-up, 208 watts during printing, 45 watts during Energy Star state 110 VAC configuration 8 and 10 amp 220 VAC configuration 4 and 5 amp Image processor: + 5 VDC ± 0.25 (1A minimum, 6 A maximum) Print engine: + 5V ± 0.25 (2.2 A max) + 24V ± 0.25 (3.0 A max) Both 110 and 220 VAC-configured instruments pass these standards: FCC Part 15 Class B VDE Class B EN60555-2 Class A VCCI (CISPR 22) Class B
Primary voltage fusing Secondary DC voltages
RF emissions
Environmental specifications
Characteristic Temperature Operating Non-operating Storage Humidity Operating Best imaging environment Non-operating Best print quality obtained Altitude Operating Non-operating Vibration/shock Operating Non-Operating (vibration) Non-operating (shock) Acoustic Noise (operating) Specification 15.5 too 32.5 C (60 too F) 91 o o 0 oto 40 oC (32 to 104o F) -0 to 40 C (32 to 104 F) Media should be acclimated 24 hours before using in the printer. 10 to 80% relative humidity, non-condensing 20 to 65% relative humidity, non-condensing 10 to 90% relative humidity, non-condensing Media should be acclimated 24 hours before using in the printer. With in 15.5 to 25.5 C (60 to 78 F) and 8 to 80% RH 0 to 2500 m (8,000 ft.) at 25 C 0 to 15000 m (50,000 ft.) May drop any side or corner 50 mm (2 in.) without impairment of subsequent operation. On five mutually perpendicular axes: 0.5 g, 25-minute sweep, 5 to 200 to 5 Hz, 100 to 200 sec./sweep cycle. No resonant frequencies below 50 Hz. 15 g, trapezoidal flared pulse, 20 msec each axis. Average sound level (LEQ) is less than 53 dbA. Peak noise in standby mode is 47 dbA.
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Phaser 740 Color Printer
Regulatory specifications
The printer is a recognized component in conformance with the following regulatory standards:
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The packaged product meets ASTM D4169-86 and ASTM D4728-87 Transportation Standards. Listed UL 1950 Information Processing and Business Equipment. Certified CSA C22.2 No. 950 Safety of Information Technology Equipment, Including Electrical Business Equipment. GS licensed IEC 950 (1991) Second Edition; EN60950 Information Processing and Business Equipment. EN50022 (CISPR 22) Class B EN61000-3-2 EN61000-3-3 VCCI (CISPR 22) Class B FCC Class B (for 115 VAC equipment) pursuant to Sub-part J of Part 15. ICES 03 Class B
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Service Guide
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Phaser 740 Color Printer