Apple Macintosh TV Spécifications

Service Source K Macintosh TV

Specifications I/O Devices - 6 I/O Devices Keyboard Supports all Apple Desktop Bus keyboards Mouse Apple Desktop Bus Mouse IINew, ergonomic design S

Adjustments Geometry - 1 Geometry Before you begin, remove the rear cover. ± Warning: This product contains high voltage and a high-vacuum picture

Adjustments Geometry - 2 Note: The controls on this monitor require a small hex-head plastic tool to make adjustments. If the tool is long, it wil

Adjustments Geometry - 3 Vertical Center 1 Use Display Service Utility to display the All-White Screen test pattern.2 Using a hex-head plastic adjus

Adjustments Geometry - 4 Horizontal Center Using a hex-head plastic adjustment tool, adjust the horizontal center (HS) control until the raster is c

Adjustments Geometry - 5 Vertical Size 1 Using a hex-head plastic adjustment tool, adjust the vertical height (VH) control until the raster height i

Adjustments Geometry - 6 Horizontal Size Note: Due to video features and timing differences across the Apple line of Macintosh computers, the widt

Adjustments Geometry - 7 Using a hex-head plastic adjustment tool, adjust the horizontal width (HW) control until the raster is 9 1/4 inches (± 1/8

Adjustments Geometry - 8 Focus 1 Use Display Service Utility to display the Focus test pattern.2 Using a hex-head plastic adjustment tool, adjust th

Adjustments Video - 9 Video Before you begin, remove the rear cover. ± Warning: This product contains high voltage and a high-vacuum picture tube.

Adjustments Video - 10 Replacement Note: Perform the cutoff adjustment whenever you replace the CRT or the analog board.

Specifications Sound and Video - 7 Sound and Video Sound Generator Records at 11 kHz or 22 kHz sample ratePlays back at 11 kHz or 22 kHz sample rate

Adjustments Video - 11 Cutoff Note: Perform the cutoff and white balance adjustments after the monitor has been on for at least 10 minutes.1 Use

Adjustments Video - 12 3 Select the Brightness Control Panel from the Apple menu. Drag the brightness control to midrange.4 Using a hex-head plastic

Adjustments Video - 13 Note: To set the green and blue drive controls to their 3/4 position, turn the controls to their full clockwise position an

Adjustments Video - 14 7 Using a hex-head plastic adjustment tool, adjust VG2 until the first bar in the test pattern is completely black and the se

Adjustments Video - 15 White Balance Note: Perform the cutoff and white balance adjustments after the monitor has been on for at least 10 minutes

Adjustments Video - 16 3 Select the Brightness Control Panel from the Apple menu. Drag the brightness control to midrange.4 Note the predominant col

Adjustments Video - 17 Note: The darkest bar must remain completely black throughout the rest of the procedure. If you notice a predominant color

Adjustments Video - 18 green (GB), and blue (BB) background controls until there is no predominant color.8 Use Display Service Utility to display th

Adjustments Video - 19 • Model 246: 25 on the red scale Important: Over time, light meter tolerance can vary. If you doubt your meter’s accuracy,

Adjustments Convergence - 20 Convergence Before you begin, remove the rear cover. ± Warning: This product contains high voltage and a high-vacuum

Specifications Electrical - 8 Electrical Line Voltage 100–240 VAC; Universal power supply Frequency 47–63 Hz, single phase Maximum Power 120 W

Adjustments Convergence - 21 1 Use Display Service Utility to display the Crosshatch I test pattern.2 Using a hex-head plastic adjustment tool, adju

Adjustments Convergence - 22 3 Using a hex-head plastic adjustment tool, adjust the N/S amp control for best convergence of horizontal lines at the

Adjustments Geometric Distortion - 23 Geometric Distortion Before you begin, remove the rear cover. ± Warning: This product contains high voltage

Adjustments Geometric Distortion - 24 1 Use Display Service Utility to display the Crosshatch I test pattern.2 Verify that the boxes on the top row

Adjustments Geometric Distortion - 25 ± Warning: The entire yoke assembly has very high voltage. To prevent electrical shock, do not touch the yok

Adjustments Geometric Distortion - 26 5 Using a hex-head plastic adjustment tool, adjust the control that is appropriate for the distortion. 6 If th

Adjustments Geometric Distortion - 27 phase adjustments. If you can’t correct the distortion, replace the analog board. See “Analog Board” in the Ta

Adjustments Yoke - 28 Yoke Before you begin, remove the rear cover. ± Warning: This product contains high voltage and a high-vacuum picture tube.

Adjustments Yoke - 29 ± Warning: Because you must make yoke adjustments from the rear of the computer, use a mirror to view the computer screen.

Adjustments Yoke - 30 1 Using an insulated Phillips screwdriver, loosen the yoke clamp screw two or three turns.2 Switch on the computer.3 With one

Specifications Physical - 9 Physical Dimensions Height: 17.9 in. (45.5 cm)Width: 13.5 in. (34.4 cm)Depth: 16.5 in. (42.0 cm) Weight 41.5 lb. (18.9 k

Adjustments Yoke - 31 4 Switch off and unplug the computer. 5 Discharge the CRT.6 Hold the plastic yoke collar in position and carefully tighten the

Adjustments Yoke - 32 8 Verify that the top and bottom edges of the picture are parallel with the top and bottom of the bezel.

Adjustments Light Meter Setup - 33 Light Meter Setup This topic covers setup for three light meter models: R77, L-248, and 246. Model R77 (Apple par

Adjustments Light Meter Setup - 34 from the lens. Three scales are shown on the light meter:• 200-1000 fc• 50-250 fc• 10-50 fcBecause display screen

Adjustments Light Meter Setup - 35 To measure a display screen’s luminance,1 Set the scale switch to the bottom position (to set up the 10-50 fc sca

Adjustments Light Meter Setup - 36 readings, verify the readings with a known-good light meter or photometer. Also check the age of the R77 light me

Adjustments Light Meter Setup - 37 Model L-248 1 Press the red button on the back of the light meter. If the reading is out of the red area, replace

Adjustments Light Meter Setup - 38 Model 246 1 Remove the metal slide, if installed, from the top of the light meter.2 Install the white lens with t

Service Source K Exploded View Macintosh TV

Exploded View 1 Exploded View Screw (4) Screw (4) Screw (4) ScrewHard Drive661-1750Hard DriveCarrier922-1806Hard DriveConnectorAdapter922-1820Rear

Specifications Environmental - 10 Environmental Operating Temperature 50–104°F (10–40°C) Storage Temperature –30 to 116°F (–30 to 47°C) Relative Hum

Service Source K Troubleshooting Macintosh TV

Troubleshooting General/ - 1 General The Symptom Charts included in this chapter will help you diagnose specific symptoms related to your product. B

Troubleshooting Symptom Charts/Video - 2 Symptom Charts Video Screen is black, too dark, or too bright; audio and drive operate1 Adjust contrast bu

Troubleshooting Symptom Charts/Video (Continued) - 3 Video (Continued) Single vertical or horizontal line is displayed Note: A thin, gray, hori

Troubleshooting Symptom Charts/Video (Continued) - 4 Video (Continued) Screen is bright and audio is present, but no video information is visible

Service Source K Basics Macintosh TV

Troubleshooting Symptom Charts/Video (Continued) - 5 Video (Continued) Screen jitters or flashes1 Verify that adjacent computer equipment is prop

Troubleshooting Symptom Charts/Video (Continued) - 6 Video (Continued) Flashing or wavy screen, or monitor emits high-pitched noiseReplace analog

Troubleshooting Symptom Charts/Video (Continued) - 7 Video (Continued) Raster tilted or shifted1 Verify that adjacent computer equipment is prope

Troubleshooting Symptom Charts/Video (Continued) - 8 Video (Continued) Raster not centered 1 Verify that adjacent computer equipment is properly

Troubleshooting Symptom Charts/Floppy Drive - 9 Floppy Drive Audio and video are present, but internal floppy drive does not operate1 Replace bad di

Troubleshooting Symptom Charts/Floppy Drive (Continued) - 10 Floppy Drive (Continued) Does not eject disk 1 Insert opened paper clip into hole be

Troubleshooting Symptom Charts/Hard Drive - 11 Hard Drive Internal or external hard drive does not operate1 Verify that SCSI loopback card is not at

Troubleshooting Symptom Charts/CD-ROM Drive - 12 CD-ROM Drive CD-ROM drive does not accept disc1 Replace disc (if dirty or damaged).2 Remove front d

Troubleshooting Symptom Charts/Peripheral - 13 Peripheral Cursor does not move 1 Check mouse connection.2 If mouse was connected to keyboard, connec

Troubleshooting Symptom Charts/Peripheral (Continued) - 14 Peripheral (Continued) Cannot double-click to open application, disk, or server1 Remov

Basics Overview - 1 Overview This manual contains complete repair procedures for the Macintosh TV shown at left.Figure: Macintosh TV

Troubleshooting Symptom Charts/Peripheral (Continued) - 15 Peripheral (Continued) Known-good ImageWriter or ImageWriter II does not print1 Make s

Troubleshooting Symptom Charts/Miscellaneous - 16 Miscellaneous Clicking, chirping, or thumping sound1 Replace analog board.2 Replace logic board. R

Troubleshooting Symptom Charts/Miscellaneous (Continued) - 17 Miscellaneous (Continued) Screen shows “Sad Macintosh” icon and black vertical line

Service Source K Take Apart Macintosh TV

Take Apart Rear Housing - 1 Rear Housing No preliminary steps are required before you begin this procedure. ± Warning: This product contains high

Take Apart Rear Housing - 2 1 Using a torx screwdriver, remove the five screws. 2 Lift off the rear cover.Rear Housing

Take Apart Fan - 3 Fan Before you begin, remove the rear cover. ± Warning: This product contains high voltage and a high-vacuum picture tube. To p

Take Apart Fan - 4 Push out the two latches and remove the fan assembly.LatchFanLatch

Take Apart Analog Board - 5 Analog Board Before you begin, do the following:• Remove the rear cover• Discharge CRT• Remove anode cap ± Warning: Th

Take Apart Analog Board - 6 1 Disconnect the two ground cables from the degauss panels.Degauss Panel Ground CableGround Cable

Service Source K Specifications Macintosh TV

Take Apart Analog Board - 7 2 Disconnect the infrared receiver connector.Infrared ReceiverConnectorWARNING: High Voltage Areas

Take Apart Analog Board - 8 3 Disconnect the following cables from the analog board:• Degauss cable from BP2 (use a small screwdriver to release the

Take Apart Analog Board - 9 5 Caution: Twisting, bending, or applying force to the video board assembly could damage the neck of the CRT. Be sure

Take Apart Analog Board - 10 6 Remove the analog board. Replacement Note: Perform the cutoff adjustment whenever you replace the analog board. See

Take Apart I/O Door - 11 I/O Door No preliminary steps are required before you begin this procedure.I/O Door

Take Apart I/O Door - 12 1 Remove the two screws (if present). 2 Push down on the two tabs and remove the I/O door.I/O DoorTabTab

Take Apart Logic Board - 13 Logic Board Before you begin, remove the I/O door. Caution: You can access and remove the Macintosh TV logic board mer

Take Apart Logic Board - 14 Pull out the logic board.Logic Board

Take Apart Tuner Assembly - 15 Tuner Assembly Before you begin, remove the following:• I/O door• Logic boardTunerAssembly

Take Apart Tuner Assembly - 16 1 Turn over the logic board.2 Using needlenose pliers, carefully twist the mounting tab of the tuner.Mounting Tab

Specifications Processor - 1 Processor CPU Motorola 68030 microprocessor32 MHzBuilt-in memory management unit (MMU)CoprocessorSocket for optional ma

Take Apart Tuner Assembly - 17 3 Turn over the logic board.4 Pull straight up on the tuner assembly and remove it from the logic board.Tuner Assembl

Take Apart Drive Bezel - 18 Drive Bezel No preliminary steps are required before you begin this procedure.Drive Bezel

Take Apart Drive Bezel - 19 Using a flat-blade screwdriver, push up the latch. Pull down and remove the drive bezel. LatchDriveBezel

Take Apart Floppy Drive - 20 Floppy Drive Before you begin, remove the drive bezel. Caution: You can access and remove the Macintosh TV floppy dri

Take Apart Floppy Drive - 21 1 Push down the latch and pull out the floppy drive.ÊFloppy Drive

Take Apart Floppy Drive - 22 2 Pull out the floppy drive connector adapter. 3 Replacement Note: Be sure to reinstall the floppy drive connector ad

Take Apart Floppy Drive - 23 4 Remove the four mounting screws and remove the floppy drive from the carrier.Carrier

Take Apart Floppy Drive - 24 5 Pull out the sides of the floppy drive shield, lift the back of the shield, and remove it from the floppy drive.Flopp

Take Apart CD-ROM Drive - 25 CD-ROM Drive Before you begin, remove the drive bezel. Caution: You can access and remove the Macintosh TV CD-ROM dri

Take Apart CD-ROM Drive - 26 1 Pull up the latch and pull out the CD-ROM drive. ÊLatchCD-ROMDrive

Specifications Memory - 2 Memory RAM 4 MB of dynamic RAM on boardExpandable to 8 MB (100 ns or faster SIMMs)72-pin DRAM SIMM connector ROM 1 MB of R

Take Apart CD-ROM Drive - 27 2 Pull out the CD connector adapter and the CD audio adapter. Replacement Note: Be sure to reinstall the CD connector

Take Apart CD-ROM Drive - 28 3 Remove the four mounting screws and remove the CD-ROM drive from the carrier. Replacement Note: Replace the carrier

Take Apart Hard Drive - 29 Hard Drive Before you begin, remove the I/O door. Caution: You can access and remove the Macintosh TV hard drive merely

Take Apart Hard Drive - 30 1 Push down the latch and remove the hard drive.Hard DriveLatch

Take Apart Hard Drive - 31 2 Pull out the hard drive connector adapter. Replacement Note: Be sure to reinstall the hard drive connector adapter on

Take Apart Hard Drive - 32 3 Remove the four screws.4 Remove the hard drive from the carrier. Replacement Note: Replace the carrier on the new har

Take Apart Chassis Harness Assembly - 33 Chassis Harness Assembly Before you begin, remove the following:• Drive bezel• I/O door• CD-ROM drive• Flop

Take Apart Chassis Harness Assembly - 34 ± Warning: This product contains high voltage and a high-vacuum picture tube. To prevent serious personal

Take Apart Chassis Harness Assembly - 35 Chassis Harness Take Apart Strategy Background After product introduction, Apple Service adjusted the servi

Take Apart Chassis Harness Assembly - 36 • Chassis 922-1824 supports the auto-insert Apple SuperDrive and CD-ROM drives earlier than the 300i+. This

Specifications Disk Storage - 3 Disk Storage Floppy Drive Internal 1.4 MB Apple SuperDrive Hard Drive 3.5-inch, internal 160 MB SCSI hard drive CD-R

Take Apart Chassis Harness Assembly - 37 For more information, refer to Apple Service Guide , Macintosh Computers, Vol. 3 (1994), page 110.Service

Take Apart Chassis Harness Assembly - 38Service Parts Now Available for Chassis 922-0767076-0488 Shield Kit (EMI shielding)922-1825 PCBA Front Panel

Take Apart Chassis Harness Assembly - 39Chassis Harness Take Apart ProceduresFirst remove the chassis harness assembly.EMI Shields1 Remove the EMI sh

Take Apart Chassis Harness Assembly - 40Speaker AssemblyFirst remove the EMI shields.Caution: The speaker wire connections on the chassis cable brid

Take Apart Chassis Harness Assembly - 411 Disconnect the speaker wire spade connector from the back of the speaker.2 Remove the Phillips screws from

Take Apart Chassis Harness Assembly - 423 Slide out the wire connector.Replacement Note: The analog board slides into the computer and completes the

Take Apart Chassis Harness Assembly - 43Front Panel Control Board First remove the EMI shields.1 Disconnect the front panel control cable.2 Remove th

Take Apart Chassis Harness Assembly - 44Logic Board Connector and Cable AssemblyFirst remove the EMI shields, speaker assembly, and front panel contr

Take Apart Chassis Harness Assembly - 451 Stand at the front of the chassis, looking down at the top of the chassis, and disconnect the following in

Take Apart Chassis Harness Assembly - 462 Route the analog board and the CD-ROM/hard drive cables through the large square hole behind the CD-ROM dri

Specifications I/O Interfaces - 4 I/O Interfaces Serial Two RS-232/RS-422 serial ports; mini DIN-8 connectors SCSI One SCSI parallel port; DB-25 con

Take Apart Chassis Harness Assembly - 47Overview of replacement procedures (Detailed steps follow the overview.) Connect the logic board connector to

Take Apart Chassis Harness Assembly - 482 Arrange the logic board connector and cable assembly as shown.3 Face the connector slot of the logic board

Take Apart Chassis Harness Assembly - 49Logic Board Connector and Cable Assembly1 Slide the side extension of the logic board connector down the fron

Take Apart Chassis Harness Assembly - 503 Route the floppy drive cable through its opening at the back of the floppy drive bay.4 Carefully route the

Take Apart Chassis Harness Assembly - 51facing the front of the chassis and the power cables facing toward the outside edge of the chassis. Slip the

Take Apart Chassis Harness Assembly - 5210 To replace the speakers, front control panel board, and EMI shields, reverse the take-apart procedures abo

Take Apart CRT - 53CRTBefore you begin, remove the following:• Drive bezel• I/O door• CD-ROM drive• Floppy drive• Hard drive• Logic board• Rear cover

Take Apart CRT - 54±Warning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bull

Take Apart CRT - 552 Lift off the CRT.Replacement Note: Be sure the infrared receiver cable is not caught under the CRT.CRTInfraredReceiverCable

Take Apart Infrared Receiver - 56Infrared ReceiverBefore you begin, remove the following:• Drive bezel• I/O door• CD-ROM drive• Floppy drive• Hard dr

Specifications I/O Interfaces - 5 Infrared Receiver For remote control Sound Sound-output port capable of delivering stereo soundSound-input port fo

Take Apart Infrared Receiver - 57±Warning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT

Take Apart Front Bezel - 58Front BezelTo remove the front bezel, remove the following:• Drive bezel• I/O door• CD-ROM drive• Floppy drive• Hard drive

Take Apart Front Bezel - 59±Warning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety

Service Source K Additional Procedures Macintosh TV

Additional Procedures Battery Verification - 1 Battery Verification Before you begin, remove the following:• I/O door• Logic board ± Warning: If h

Additional Procedures Battery Verification - 2 Caution: Review the ESD precautions in Bulletins/Safety.1 Set the voltmeter to the 10 volts DC scal

Additional Procedures Battery Replacement - 3 Battery Replacement Before you begin, remove the following:• I/O door• Logic board ± Warning: If han

Additional Procedures Battery Replacement - 4 Caution: To prevent ESD damage to components, wear a grounding wriststrap and use a grounded workben

Additional Procedures Battery Replacement - 5 3 Grasp the battery and remove it from the holder.4 Return the battery to Apple for proper disposal. F

Service Source K Adjustments Macintosh TV