Macintosh Portrait Display Service Source

The Macintosh Portrait Display volume of Apple's Service Source is Apple's 108-page module-level service manual for the Macintosh Portrait Display, Apple's 15-inch monochrome portrait monitor. The PDF was created on 5 December 1995 for the Service Source CD. Chapters are numbered from page 1 each.

Apple made domestic and international versions of the Portrait Display, and their troubleshooting and repair procedures differ. This manual covers the domestic version only; Apple refers the international "Series B" to a separate manual (Basics p. 1).

Contents

Chapter	Sections (chapter page)	PDF pages
Basics	International "Series B" (1), Monitor Distortion (2-5)	3-7
Specifications	Characteristics (1-2), Controls and Ports (3), Physical and Electrical (4), Operating Environment (5)	9-13
Troubleshooting	General (1); Symptom Charts: No Raster (2-3), Geometry (4-6), Video Display (7), Synchronization (8), Miscellaneous (9)	15-23
Take Apart	Rear Cover (1-2), EMI Shield (3-5), AC Input Assembly (6-8), Fuse (9-10), Signal Input Assembly (11-13), Fan (14-16), Video Board (17-21), Contrast Brightness Board (22-23), CRT Board (24-30), Power/Sweep Board (31-35), Bezel (36-38), LED Cable Assembly (39-42), CRT (43-46)	25-70
Adjustments	Monitor Safety (2), Light Meter Setup (3-8), Geometry (9-17), Video With Screen Control (18-26), Video Without Screen Control (27-36)	72-106
Exploded View	one drawing with part numbers	108

What it settles

• Specifications: 15-inch screen, P4 (white) phosphor; 640 × 870 pixels at 80 dpi; 75 Hz vertical, 68.85 kHz horizontal, 52 MHz dot clock; active area 8 × 10.87 in (203 × 276 mm); universal supply 90-270 V AC, 47-63 Hz, 75 W maximum; 16 kg (Specifications pp. 1-4).
• Monitor Distortion (Basics pp. 2-5): Apple's list of environmental distortions (metal furniture, fluorescent lights, other monitors and appliances) to rule out before adjusting or repairing a distorted raster.
• Symptom charts, including the order for no raster with the LED off: video cable, power cord, internal power connections, fuse, power/sweep board, video board (Troubleshooting p. 2).
• Geometry targets (Adjustments pp. 9-17): raster width 8 in ± 1/8 in (203 ± 2 mm), height 10 7/8 in ± 1/8 in (276 ± 2 mm), side margins about 1/4 in (7-8 mm).
• Video Without Screen Control (p. 31): with shielded clip leads on TP1 and TP2 of the CRT board, set the BIAS control for 55 V DC ± 1.0 V. Apple asks for the monitor to be switched off before connecting or removing the clips.
• Light Meter Setup (pp. 3-8) covers the R77 (Apple part 076-0310), L-248 and 246 light meters.
• Exploded-view part numbers: power/sweep board 661-0117; video board 661-0118; CRT video board 661-0119; CRT assembly 076-0350; fuse 941-0017; fan 983-0014; AC input assembly 937-0019; signal input assembly 937-0022; contrast/brightness board 982-0004.

What this manual does not contain

• No schematics, no component-level parts list and no component values.
• The international "Series B" display.
• No anode (EHT) voltage figure; the only test-point voltage is the 55 V bias setting.
• Two separate video procedures, "With Screen Control" and "Without Screen Control"; Apple directs the technician to the second if the monitor has no screen control, so check which one applies before starting.

Pages that cite this document

• Apple Two-Page Mono Service Source
• Macintosh 12 Monochrome Service Source

The Portrait Display contains a CRT and a live power/sweep board. Apple's adjustments are made from the rear with a mirror to view the screen. Follow CRT Discharge Procedure before working inside one.

Download: Portrait_display.pdf (1011 KB)