IBM PS/2 8511 Owner's manual

COVER Book Cover
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IBM Personal System/2 8511 and 8518 Color Displays
Hardware Maintenance - Service supplement
Document Number S41G-2925-00
Part Number 41G2925
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IBM PS/2 8511 and 8518 Color Displays HMS
Book Cover
¦ Copyright IBM Corp. 1992.
COVER - 1

CONTENTS Table of Contents
COVER Book Cover
CONTENTS Table of Contents
FIGURES Figures
FRONT_1 Notices
1.0 Diagnostic Guide
1.1 Initial Checks
1.1.1 Visual check 0100
1.1.2 Power check 0110
1.2 Self-Test
1.3 Basic Function Checks
1.4 Pattern Checks
2.0 Alignment Procedures
2.1 Test Equipment
2.1.1 Setup of Test Equipment
2.2 Maintenance Controls and Internal Connectors
2.2.1 Analog Card - Potentiometers
2.2.2 Connectors - Internal
2.2.3 EHT Transformer
2.2.4 Video Card - Potentiometers
2.3 Preliminary Steps
2.4 Geometry
2.5 Video Levels and Cutoff Voltages
2.5.1 Procedure Using a Color Analyzer
2.6 Focus
2.7 Degaussing
3.0 Tools and Test Equipment
3.1 Test Equipment Setup
3.2 8511 Color Display Parts
3.3 Color Display 8518 Parts
3.4 Notes:
3.4.1 RID Tag
IBM PS/2 8511 and 8518 Color Displays HMS
Table of Contents
¦ Copyright IBM Corp. 1992.
CONTENTS - 1

FIGURES Figures
1. Analog and Video Cards: High Voltage Areas 1.0
2. Self-Test Pattern 1.2
3. Analog and Video Cards 2.2
4. Video Card, Gain and Cutoff Controls 2.2.4
5. Test Equipment Setup 3.1
March 1992
This pamphlet contains display test information and a parts listing for
the IBM Personal System/2 8511 and 8518 Color Displays.
It is intended to be used with the IBM Personal System/2 Hardware
Maintenance Service (part number 15F2200, form number S15F-2200).
Refer to the Hardware Maintenance Service General Information for the
following information:
General safety
Electrical safety
Safety inspection guide.
Part Number 41G2925
Form Number S41G-2925-00
¦ Copyright International Business Machines Corporation 1992. All rights
reserved.
IBM PS/2 8511 and 8518 Color Displays HMS
Figures
¦ Copyright IBM Corp. 1992.
FIGURES - 1

FRONT_1 Notices
References in this publication to IBM products, programs, or services do
not imply that IBM intends to make these available in all countries in
which IBM operates.
Any reference to an IBM licensed program or other IBM product in this
publication is not intended to state or imply that only the IBM program or
other product may be used. Any functionally equivalent program that does
not infringe any IBM intellectual property rights may be used instead of
the IBM product. Evaluation and verification of operation in conjunction
with other products, except those expressly designated by IBM, is the
user's responsibility.
IBM may have patents or pending patent applications covering subject
matter in this document. The furnishing of this document does not give
you any license to these patents. You can send license enquiries to the
IBM Director of Commercial Relations, IBM Corporation, Purchase, NY 10577.
The warranty terms and conditions applicable in the country of purchase in
respect of an IBM product are available from the supplier. Please retain
them with your proof of purchase.
The following terms, denoted by a star ((*)), used in this publication,
are trademarks or service marks of the IBM Corporation in the United
States or other countries:
IBM Personal System/2 PS/2
The following terms, denoted by a double star ((**)), used in this
publication, are trademarks or service marks of other companies:
Minolta Minolta Corporation
Torx Textron Incorporated
No statements contained in this documentation shall affect the statutory
rights of consumers.
IBM PS/2 8511 and 8518 Color Displays HMS
Notices
¦ Copyright IBM Corp. 1992.
FRONT_1 - 1

1.0 Diagnostic Guide
This section describes the procedures for diagnosing and correcting
problems on the Color Display. Instructions on how to adjust the display
are included.
Refer to the IBM Personal System/2 8511 and 8518 Color Displays Hardware
Maintenance Reference for details of how to get access to the controls on
the video assembly.
DANGER
+------------------------------------------------------------------------+
¦ Some areas of the analog and video card assembly (shown shaded in ¦
¦ Figure 1) carry high voltages. ¦
+------------------------------------------------------------------------+
CAUTION:
Use extreme caution when making adjustments with the display powered on;
these adjustments should not be performed unattended.
The display must never be left unattended with the covers removed and
powered on in a customer environment.
DO NOT adjust RV100 (factory adjustment only).
To prevent electrical shock, power off the display and disconnect the
power cord before you change any part.
High voltages may remain on the anode of the CRT after the display is
powered off. Discharge in accordance with CRT safety instructions.
CRTs are under vacuum. All persons working near an exposed CRT must wear
safety glasses and long-sleeved clothing (or comparable protection).
PICTURE 1
Figure 1. Analog and Video Cards: High Voltage Areas
Subtopics
1.1 Initial Checks
1.2 Self-Test
1.3 Basic Function Checks
1.4 Pattern Checks
IBM PS/2 8511 and 8518 Color Displays HMS
Diagnostic Guide
¦ Copyright IBM Corp. 1992.
1.0 - 1

1.1 Initial Checks
The initial checks, visual and power, confirm whether or not the display
is ready for operation.
Subtopics
1.1.1 Visual check 0100
1.1.2 Power check 0110
IBM PS/2 8511 and 8518 Color Displays HMS
Initial Checks
¦ Copyright IBM Corp. 1992.
1.1 - 1

1.1.1 Visual check 0100
+---+
¦001¦
+---+
- Check the display and connectors visually for damage, and ensure that
the connectors are properly attached.
IS THE DISPLAY DAMAGED?
Yes No
¦ ¦
¦ ¦
¦ +---+
¦ ¦002¦
¦ +---+
¦
¦ Go to Power check.
¦
¦
+---+
¦003¦
+---+
- Exchange the damaged parts.
Go to Power check.
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IBM PS/2 8511 and 8518 Color Displays HMS
Visual check 0100
¦ Copyright IBM Corp. 1992.
1.1.1 - 1

1.1.2 Power check 0110
Note: If you change the card tray assembly or the Integrated Tube
Component (ITC), you must then check all the adjustments for the display.
+---+
¦001¦
+---+
- Remove the power cord from the power outlet, and then from the display.
- Set the power switch to On and to Off several times.
DOES THE POWER SWITCH OPERATE NORMALLY?
Yes No
¦ ¦
¦ ¦
¦ +---+
¦ ¦002¦
¦ +---+
¦
¦ Install new card tray assembly.
¦
¦
+---+
¦003¦
+---+
- Set the power switch to Off.
- Connect a power cord (that is known to be good) to the display and then
to the electrical power outlet.
- Set the power switch to On.
IS THE POWER LED ON?
Yes No
¦ ¦
¦ ¦
¦ +---+
¦ ¦004¦
¦ +---+
¦
¦ Install new card tray assembly.
¦
¦
+---+
¦005¦
+---+
Continue with Self-Test.
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IBM PS/2 8511 and 8518 Color Displays HMS
Power check 0110
¦ Copyright IBM Corp. 1992.
1.1.2 - 1

1.2 Self-Test
The display must be powered on for five minutes before starting the test.
1. Power off the display.
2. Ensure that the signal cable is disconnected.
3. Power on the display.
4. Set the contrast and brightness controls to maximum (from left to
right).
5. The self-test pattern on the screen should be a full white raster (a
pattern of horizontal scanned lines) with a black border 2 mm to 20 mm
(0.08 in. to 0.79 in.). The black border may not be on all four
sides.
6. If the self-test pattern does not appear, go to "Basic Function
Checks" in topic 1.3.
PICTURE 2
Figure 2. Self-Test Pattern
IBM PS/2 8511 and 8518 Color Displays HMS
Self-Test
¦ Copyright IBM Corp. 1992.
1.2 - 1

1.3 Basic Function Checks
Basic functions can be checked using the self-test raster.
Refer to "Alignment Procedures" in topic 2.0 when adjustments are required
after replacing components.
Refer to the IBM Personal System/2 8511 and 8518 Color Displays Hardware
Maintenance Reference for removal and replacement procedures.
+------------------------------------------------------------------------+
¦ Symptom ¦ Action ¦
+------------------------------------+-----------------------------------¦
¦ Any problems. ¦ First, check all connections and ¦
¦ ¦ plugs for continuity. ¦
+------------------------------------+-----------------------------------¦
¦ Green LED lit but test raster ¦ Adjust G2 control clockwise until ¦
¦ missing. ¦ test raster appears AGAINST ¦
¦ ¦ background raster. If no raster ¦
¦ ¦ appears, replace ITC. ¦
+------------------------------------+-----------------------------------¦
¦ Test raster is not white. ¦ Adjust gain controls for missing ¦
¦ ¦ colors. If colors reappear, ¦
¦ ¦ reset color point of ITC. ¦
¦ ¦ Otherwise replace ITC. ¦
+------------------------------------+-----------------------------------¦
¦ Background raster is not white. ¦ Adjust cutoff controls for ¦
¦ ¦ missing colors. If colors ¦
¦ ¦ reappear, reset color point of ¦
¦ ¦ ITC. Otherwise replace ITC. ¦
+------------------------------------+-----------------------------------¦
¦ Test raster scan is collapsed ¦ If partially collapsed, adjust as ¦
¦ horizontally or vertically. ¦ appropriate. If fully collapsed, ¦
¦ ¦ replace card tray assembly. ¦
+------------------------------------------------------------------------+
Note: The integrated tube component (ITC) includes the CRT, yoke
assembly, and associated components. The card tray assembly includes the
video, analog, control, and ac inlet cards.
IBM PS/2 8511 and 8518 Color Displays HMS
Basic Function Checks
¦ Copyright IBM Corp. 1992.
1.3 - 1

1.4 Pattern Checks
These symptoms relate to operating the display with a crosshatch pattern
displayed.
Before starting any checks, ensure that all plugs and connectors are
positioned correctly and securely.
Refer to "Alignment Procedures" in topic 2.0 when adjustments are
required.
Refer to the IBM Personal System/2 8511 and 8518 Color Displays Hardware
Maintenance Reference for removal and replacement procedures.
+------------------------------------------------------------------------+
¦ Symptom ¦ Action ¦
+----------------------+-------------------------------------------------¦
¦ Displayed image ¦ Adjust RV303. If symptom persists, replace ¦
¦ width is too large ¦ card tray assembly. ¦
¦ or too small. ¦ ¦
+----------------------+-------------------------------------------------¦
¦ Displayed image ¦ Adjust RV400. If symptom persists, replace ¦
¦ height is too large ¦ card tray assembly. ¦
¦ or too small. ¦ ¦
+----------------------+-------------------------------------------------¦
¦ Color purity of ¦ Check degauss circuit. Ensure that P100 is ¦
¦ displayed image is ¦ connected. Power off for 30 minutes. Power on ¦
¦ poor. ¦ again to check degauss action. If symptom ¦
¦ ¦ persists, replace card tray assembly. ¦
¦ ¦ ¦
¦ ¦ ITC defective. Replace ITC. ¦
+----------------------+-------------------------------------------------¦
¦ Contrast or ¦ Check connections between P400 and P802. If ¦
¦ brightness controls ¦ good, replace card tray assembly. ¦
¦ are not working. ¦ ¦
+----------------------+-------------------------------------------------¦
¦ Maximum or minimum ¦ Video color point is not set. Adjust as ¦
¦ white is poor. ¦ appropriate. ¦
+----------------------+-------------------------------------------------¦
¦ East west pincushion ¦ Adjust RV302 for optimum vertical lines. If ¦
¦ correction (EWPCC) ¦ this is not possible, replace the card tray ¦
¦ is poor (vertical ¦ assembly. ¦
¦ lines are bowed or ¦ ¦
¦ barrel shaped). ¦ ¦
+----------------------+-------------------------------------------------¦
¦ No horizontal or ¦ If good with test raster (signal cable ¦
¦ vertical ¦ disconnected), replace signal cable. ¦
¦ synchronization. ¦ ¦
¦ ¦ ¦
¦ One or more colors ¦ ¦
¦ missing. ¦ ¦
+----------------------+-------------------------------------------------¦
¦ Displayed image does ¦ Ensure that P300 is connected. If symptom ¦
¦ not synchronize ¦ persists, replace card tray assembly. ¦
¦ horizontally. ¦ ¦
+----------------------+-------------------------------------------------¦
¦ Displayed image does ¦ Ensure that P300 is connected. If symptom ¦
¦ not synchronize ¦ persists, replace card tray assembly. ¦
¦ vertically. ¦ ¦
+----------------------+-------------------------------------------------¦
¦ Displayed image is ¦ Adjust RV304. If image cannot be centered, ¦
¦ not centered ¦ centering circuit is faulty. Replace card tray ¦
¦ horizontally. ¦ assembly. ¦
+----------------------+-------------------------------------------------¦
+----------------------+-------------------------------------------------¦
¦ Displayed image ¦ Height selection circuit is faulty. Replace ¦
¦ height varies ¦ card tray assembly. ¦
¦ excessively between ¦ ¦
¦ modes. ¦ ¦
+----------------------+-------------------------------------------------¦
¦ Displayed image ¦ Width regulation is unstable. Ensure that P300 ¦
¦ appears broken up ¦ is connected. If symptom persists, replace ¦
¦ horizontally. ¦ card tray assembly. ¦
+------------------------------------------------------------------------+
IBM PS/2 8511 and 8518 Color Displays HMS
Pattern Checks
¦ Copyright IBM Corp. 1992.
1.4 - 1

2.0 Alignment Procedures
CAUTION:
Use extreme caution when making adjustments with the display powered on;
these adjustments should not be performed unattended.
The display must never be left unattended with the covers removed and
powered on in a customer environment.
Refer to the IBM Personal System/2 8511 and 8518 Color Displays Hardware
Maintenance Reference, for details of how to get access to maintenance
controls.
All adjustments must be completed in the sequence given here.
Subtopics
2.1 Test Equipment
2.2 Maintenance Controls and Internal Connectors
2.3 Preliminary Steps
2.4 Geometry
2.5 Video Levels and Cutoff Voltages
2.6 Focus
2.7 Degaussing
IBM PS/2 8511 and 8518 Color Displays HMS
Alignment Procedures
¦ Copyright IBM Corp. 1992.
2.0 - 1

2.1 Test Equipment
Refer to "Tools and Test Equipment" for details of tools and test
equipment required.
Subtopics
2.1.1 Setup of Test Equipment
IBM PS/2 8511 and 8518 Color Displays HMS
Test Equipment
¦ Copyright IBM Corp. 1992.
2.1 - 1

2.1.1 Setup of Test Equipment
Ensure that the connections of all cables are set up as shown in "Tools
and Test Equipment" in topic 3.0.
IBM PS/2 8511 and 8518 Color Displays HMS
Setup of Test Equipment
¦ Copyright IBM Corp. 1992.
2.1.1 - 1

2.2 Maintenance Controls and Internal Connectors
PICTURE 3
Figure 3. Analog and Video Cards
Subtopics
2.2.1 Analog Card - Potentiometers
2.2.2 Connectors - Internal
2.2.3 EHT Transformer
2.2.4 Video Card - Potentiometers
IBM PS/2 8511 and 8518 Color Displays HMS
Maintenance Controls and Internal Connectors
¦ Copyright IBM Corp. 1992.
2.2 - 1

2.2.1 Analog Card - Potentiometers
RV100 Factory Adjustment Only
RV400 Vertical Height
RV302 East West Pincushion Correction (EWPCC)
RV401 Vertical Centering
RV303 Horizontal Width
RV304 Raster Centering
IBM PS/2 8511 and 8518 Color Displays HMS
Analog Card - Potentiometers
¦ Copyright IBM Corp. 1992.
2.2.1 - 1

2.2.2 Connectors - Internal
P100 Degauss
P103 Mains Input
P300 Synchronization
P401 Horizontal and Vertical Coils
P301/P601 Video Card Supply Interface (Fixed)
P400/P802 Control Card Interface
P600 Video/Test Signal
IBM PS/2 8511 and 8518 Color Displays HMS
Connectors - Internal
¦ Copyright IBM Corp. 1992.
2.2.2 - 1

2.2.3 EHT Transformer
G2 Control
Focus
IBM PS/2 8511 and 8518 Color Displays HMS
EHT Transformer
¦ Copyright IBM Corp. 1992.
2.2.3 - 1

2.2.4 Video Card - Potentiometers
RV600 White Video Gain
RV652 Green Video Gain
RV632 Red Video Gain
RV651 Green Video Cutoff
RV631 Red Video Cutoff
RV671 Blue Video Cutoff
PICTURE 4
Figure 4. Video Card, Gain and Cutoff Controls
IBM PS/2 8511 and 8518 Color Displays HMS
Video Card - Potentiometers
¦ Copyright IBM Corp. 1992.
2.2.4 - 1

2.3 Preliminary Steps
1. Insert the IBM PS/2 Color Display 8518 Setup Diskette into drive A of
the system unit.
Note: The IBM PS/2 Color Display 8518 Setup Diskette is used for
setting up both the 8511 and 8518 Color Displays.
DANGER
+------------------------------------------------------------------------+
¦ Use caution when making adjustments with the cover removed. There are ¦
¦ high voltages on the analog and video cards. ¦
+------------------------------------------------------------------------+
2. Power on the system unit and the Display. The system unit runs its
internal checks, and then loads the program from the diskette.
3. With the Brightness control set to center detent (midpoint), adjust G2
and Focus until the setup menu is visible. Select pattern C and
adjust the G2 control to give minimum background illumination.
4. Allow 20 minutes for the display to warm up before making any further
adjustments.
5. Set the Contrast control to midpoint.
IBM PS/2 8511 and 8518 Color Displays HMS
Preliminary Steps
¦ Copyright IBM Corp. 1992.
2.3 - 1