Josh: Correct EEPROM consequence (lost settings = display cannot be repaired, per Apple; not a realignment); cite damper-wire note to the manual; add microprocessor board revision check and CRT shutdown test; page-cited refs; remove bold

2026-09-30T13:22:53Z

Correct EEPROM consequence (lost settings = display cannot be repaired, per Apple; not a realignment); cite damper-wire note to the manual; add microprocessor board revision check and CRT shutdown test; page-cited refs; remove bold

← Older revision		Revision as of 14:22, 30 September 2026
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	The '''Apple Multiple Scan 17 Display''' volume of Apple's ''Service Source'' is a ~~'''~~101-page~~'''~~ service manual. The PDF was distilled on 21 December 1995.		The '''Apple Multiple Scan 17 Display''' volume of Apple's ''Service Source'' is a 101-page service manual for the Multiple Scan 17, a 17-inch Trinitron colour display with ADB and sound ports in its stand. The PDF was distilled on 21 December 1995.<ref name="ss">Apple Computer, ''Apple Multiple Scan 17 Display'' (''Service Source''), 101 pp., 1995. Hosted as [[:File:Multiple scan 17 display.pdf]].</ref>

	== Specifications as printed ==		== Specifications as printed ==
	<templatestyles src="Template:StyledTable/styles.css" />		<templatestyles src="Template:StyledTable/styles.css" />
	{\| class="wikitable styled-table"		{\| class="wikitable styled-table"
	\|-		\|+'''Apple Multiple Scan 17 specifications'''<ref name="spec">''Apple Multiple Scan 17 Display'' Service Source, Specifications: Characteristics pp. 1-2, Controls and Ports p. 3, Physical and Electrical pp. 4-5, Environmental p. 6 (PDF pp. 6-11).</ref>
	! Item !! Value		! Item !! Value
	\|-		\|-
	\| Picture tube \|\| 17 in diagonal ~~'''~~Trinitron~~'''~~, 16.1 in viewable; bonded glass panel with antiglare/antistatic multilayer coating; ~~'''~~0.26 mm stripe pitch~~'''~~		\| Picture tube \|\| 17 in diagonal Trinitron, 16.1 in viewable; bonded glass panel with antiglare/antistatic multilayer coating; 0.26 mm stripe pitch
	\|-		\|-
	\| Screen resolution \|\| 640 x 480, 800 x 600, 832 x 624, 1024 x 768		\| Screen resolution \|\| 640 × 480, 800 × 600, 832 × 624, 1024 × 768
	\|-		\|-
	\| Scan rates \|\| ~~vertical refresh '''~~50-150 Hz~~'''~~; horizontal ~~'''~~29-82 kHz~~'''~~; Macintosh, XGA, VGA, SVGA and VESA compatible		\| Scan rates \|\| Vertical 50-150 Hz; horizontal 29-82 kHz; Macintosh, XGA, VGA, SVGA and VESA compatible
	\|-		\|-
	\| Video input \|\| RGB analogue RS-343A, 0.714 V p-p positive-going; sync on green 0.286 V ±10%; separate or composite sync 1-5 V p-p, either polarity		\| Video input \|\| RGB analogue RS-343A, 0.714 V p-p positive-going; sync on green 0.286 V ±10%; separate or composite sync 1-5 V p-p, either polarity
	\|-		\|-
	\| Mains \|\| ~~universal~~, ~~'''~~90-132 and 198-260 VAC self-configuring~~'''~~, 47-63 Hz		\| Controls \|\| Front: power, reset, control buttons, brightness, contrast; command button for shift, size, rotation, convergence and colour temperature
			\|-
			\| Mains \|\| Universal, 90-132 and 198-260 VAC self-configuring, 47-63 Hz
	\|-		\|-
	\| Power \|\| ~~'''~~150 W maximum~~'''~~		\| Power \|\| 150 W maximum
	\|-		\|-
	\| Size / weight \|\| ~~16.5 in (~~424 mm) H ~~x 15.8 in (~~405 mm) W ~~x 17.6 in (~~452.3 mm) D; ~~'''~~50.0 lb ~~(22.5 kg~~)~~'''~~		\| Size and weight \|\| 424 mm H × 405 mm W × 452.3 mm D; 22.5 kg (50.0 lb)
	\|-		\|-
	\| ~~I/O ports~~ \|\| ~~two~~ ADB ports ~~plus~~ one ~~ADB pass-through~~; microphone input and ~~pass~~-~~through; headphone/speaker input~~ and ~~pass~~-~~through~~		\| Ports \|\| Three ADB ports in the stand (two front, one rear); microphone input and speaker/headphone output at the front; sound-in and sound-out at the rear
	\|}		\|}

	~~Being~~ a ~~Trinitron~~, ~~this tube has~~ '''~~damper wires~~''~~': one or two faint horizontal lines across the screen are a property of the aperture grille~~, ~~not a fault~~.		== EEPROM settings ==
			Each Multiple Scan 17 has an EEPROM on the microprocessor board holding adjustment information specific to that display. Before replacing the microprocessor board, save the EEPROM with the MacTest Pro Display Setting Restore Utility over a mini-DIN-8 serial cable ("Create File"), fit the new board, then write the file back ("Write File"). A new board's default settings leave the display readable only with difficulty. Apple warns that if the settings are lost before they are written to the new EEPROM, the display cannot be repaired and must be replaced, and that a saved file must only be written back to the display it came from.<ref name="eeprom">''Apple Multiple Scan 17 Display'' Service Source, Basics, "EEPROM Settings" p. 1 (PDF p. 3), and Troubleshooting, "Display Setting Restoration" pp. 5-9 (PDF pp. 17-21).</ref>

	== ~~The EEPROM, and why it matters before you swap a board~~ ==		== Diagnostic notes from the manual ==
	The ~~Basics chapter opens with '''EEPROM Settings''',~~ and the ~~Troubleshooting chapter carries~~ a '''Display ~~Setting Restoration~~''~~' procedure in three parts~~: ~~connect the hardware~~, ~~save the EEPROM information~~, ~~and restore it~~. ~~This display stores its geometry and convergence alignment in non~~-~~volatile memory on~~ the microprocessor board. ~~'''Save~~ the ~~EEPROM contents before replacing~~ a board~~'''~~, or the ~~replacement will need~~ a ~~full factory realignment~~ that the ~~field procedure does not~~ cover.		* The two thin horizontal lines about a quarter to a third of the way from the top and bottom of the picture are the support wires of the Trinitron aperture grille. They are not a defect and cannot be removed by repair.<ref name="misc">''Apple Multiple Scan 17 Display'' Service Source, Troubleshooting: Symptom Charts/Raster p. 13, Power p. 14, Miscellaneous pp. 19-20 (PDF pp. 25-26, 31-32).</ref>
			* An oversized raster that the adjustments do not affect points to an early microprocessor board. On the component side, a nine-digit number ending -12 with a white mark, or -13 without one, is an updated board; -11, or -12 without a white mark, needs replacing (after saving the EEPROM).<ref name="misc" />
			* Colour blotches at the edges of a white screen and vertical jitter are usually caused by magnetic fields or interference in the surroundings; Apple's first step is to degauss and move the display.<ref name="misc" />
			* A display that shuts down shortly after power-up: with the rear cover and EMI shield off and the CRT discharged, pull the CRT/video board straight off the tube neck onto an insulating sheet and power up. If the power light stays on, the CRT is defective; if the display still shuts down, replace the main deflection board.<ref name="crt">''Apple Multiple Scan 17 Display'' Service Source, Troubleshooting, "CRT" pp. 10-11 (PDF pp. 22-23).</ref>

	== Contents ==		== Contents ==
	* ~~'''~~Basics~~''' -~~ EEPROM Settings (~~pdf~~ pp. 3-4)		* Basics: EEPROM Settings (PDF pp. 3-4)
	* ~~'''~~Specifications~~''' -~~ Characteristics, Controls and Ports, Physical and Electrical, Environmental (~~pdf~~ pp. 6-11)		* Specifications: Characteristics, Controls and Ports, Physical and Electrical, Environmental (PDF pp. 6-11)
	* ~~'''~~Troubleshooting~~''' -~~ General, First Checklist, Display Setting Restoration ~~(three parts)~~, CRT, ~~symptom charts~~ for Raster, Power, Indicator Lights and Miscellaneous (~~pdf~~ pp. 13-32)		* Troubleshooting: General, First Checklist, Display Setting Restoration, CRT, Symptom Charts for Raster, Power, Indicator Lights and Miscellaneous (PDF pp. 13-32)
	* ~~'''~~Take Apart~~''' -~~ Monitor Stand, Monitor Stand Cables, Rear Cover, EMI Shield, CRT/Video Board, Video Cable, ~~'''~~Serial I/O Board~~'''~~, AC Inlet, ~~'''~~Microprocessor Board~~'''~~, Main Deflection Board, Control Panel Board (~~pdf~~ pp. 34-77)		* Take Apart: Monitor Stand, Monitor Stand Cables, Rear Cover, EMI Shield, CRT/Video Board, Video Cable, Serial I/O Board, AC Inlet, Microprocessor Board, Main Deflection Board, Control Panel Board (PDF pp. 34-77)
	* ~~'''~~Adjustments~~''' -~~ Brightness and Contrast, Geometry, Convergence, Color Temperature, ~~'''~~Factory Settings~~'''~~ (~~pdf~~ pp. 79-99)		* Adjustments: Brightness and Contrast, Geometry, Convergence, Color Temperature, Factory Settings (PDF pp. 79-99)
	* ~~'''~~Exploded View~~'''~~ (~~pdf pp~~. ~~100-~~101)		* Exploded View (PDF p. 101)

	== What this manual does not contain ==		== What this manual does not contain ==
	No parts list, no schematic, no component values, no ~~fuse rating. The~~ high-voltage figure ~~is not printed~~. ~~Board-level repair is not described; every fault resolves to a~~ board ~~exchange plus an EEPROM restore~~.		No parts list, schematic, component values or fuse rating, and no high-voltage figure. Repairs are board exchanges.<ref name="ss" />

	== ~~Pages that cite this document~~ ==		== Related pages ==
	* [[17" ColorSync Displays Service Source]] - Apple's later 17-inch Trinitron, which uses the same EEPROM approach.
	* [[Apple Multiple Scan 20 Service Source]]		* [[Apple Multiple Scan 20 Service Source]]
			* [[17" ColorSync Displays Service Source]]
	~~A CRT display holds a lethal charge on the anode after the mains is removed. Follow~~ [[CRT Discharge Procedure]] ~~before working inside one~~.		* [[CRT Discharge Procedure]]: the CRT test above is done with the display powered and the covers off.

	<pdf> File:Multiple scan 17 display.pdf </pdf>		<pdf> File:Multiple scan 17 display.pdf </pdf>

	Download: [[:File:Multiple scan 17 display.pdf\|Multiple scan 17 display.pdf]]		Download: [[:File:Multiple scan 17 display.pdf\|Multiple scan 17 display.pdf]]

			== References ==
			<references />

	[[Category:Service Manuals]]		[[Category:Service Manuals]]
	[[Category:Apple Vintage Computers]]		[[Category:Apple Vintage Computers]]
	[[Category:Apple Service Source]]		[[Category:Apple Service Source]]

Josh: P4: turn document holder into a real documentation page (verification drive)

2026-09-25T06:37:36Z

P4: turn document holder into a real documentation page (verification drive)

@@ Line 1: / Line 1: @@
-<pdf> File:multiple_scan_17_display.pdf </pdf>
+The '''Apple Multiple Scan 17 Display''' volume of Apple's ''Service Source'' is a '''101-page''' service manual. The PDF was distilled on 21 December 1995.
-Download the Apple Multiple Scan 17 Service Source Here: [[:File:multiple_scan_17_display.pdf|multiple_scan_17_display.pdf]]
+== Specifications as printed ==
 [[Category:Service Manuals]]
 [[Category:Apple Vintage Computers]]
 [[Category:Apple Service Source]]

Josh: Auto-created Service Source documentation page

2025-04-10T22:25:45Z

Auto-created Service Source documentation page

New page

<pdf> File:multiple_scan_17_display.pdf </pdf>

Download the Apple Multiple Scan 17 Service Source Here: [[:File:multiple_scan_17_display.pdf|multiple_scan_17_display.pdf]]

[[Category:Service Manuals]]
[[Category:Apple Vintage Computers]]
[[Category:Apple Service Source]]

Apple Multiple Scan 17 Service Source - Revision history

Josh: Correct EEPROM consequence (lost settings = display cannot be repaired, per Apple; not a realignment); cite damper-wire note to the manual; add microprocessor board revision check and CRT shutdown test; page-cited refs; remove bold

Josh: P4: turn document holder into a real documentation page (verification drive)

Josh: Auto-created Service Source documentation page