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Removing the heat sink

Attention: To avoid damage to the unit, establish personal grounding before

touching this unit.

To remove the heat sink and processor:

1. Unplug the fan connector (C in Figure 19 on page 35).

2. See Figure 21 and loosen the 4 screws (A in Figure 21) that retain the heat

sink and remove them.

Note:

To replace the processor, go to “Removing the processor” on page 38.

To replace the heat sink, follow these steps:

1. Place the heat sink on the alignment pin (B) such that it aligns the heat sink

screws with the matching holes on the heat sink bracket.

2. Tighten the four retainer screws (A) by securing them to the bottom, but do

not overtighten.

3. Re-plug the fan connector.

Figure 21. Heat sink and processor

Updated August, 2006

Chapter 4. Removing and replacing FRUs 37

Summary of content (16 pages)

PAGE 1
Updated August, 2006 Removing the heat sink Attention: To avoid damage to the unit, establish personal grounding before touching this unit. To remove the heat sink and processor: Figure 21. Heat sink and processor 1. Unplug the fan connector ( C in Figure 19 on page 35). 2. See Figure 21 and loosen the 4 screws ( A in Figure 21) that retain the heat sink and remove them. Note: To replace the processor, go to “Removing the processor” on page 38. To replace the heat sink, follow these steps: 1.
PAGE 2
Updated August, 2006 Removing the processor Note: See Figure 21 on page 37. Locate the processor ( C ) after you remove the heat sink. To 1. 2. 3. remove the processor, follow these steps: Turn the screw that holds the processor 180° to release it. Lift out the processor, carefully keeping your fingers on each side of the module. To replace, reverse this procedure. Removing the hard disk drive and bracket Follow these steps to remove the hard disk drive and bracket: C A D B Figure 22.
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Updated August, 2006 Removing the speakers Follow these steps to remove the speakers: 1. Remove the back cover as described in “Removing the back cover” on page 31. 2. Detach each speaker cable ( A in Figure 23) from the adjacent circuit board. Figure 23. Removing the speakers 3. See Figure 23. Remove the two screws ( C ) that hold each speaker ( B ) and lift to remove. 4. To replace, reverse these steps. Chapter 4.
PAGE 4
Updated August, 2006 Removing the system board Attention: To avoid damage to the unit, establish personal grounding before touching this unit. 1. Remove the back cover as described in “Removing the back cover” on page 31. 2. Remove the hard drive fan as described in Figure 19 on page 35. 3. If installed, detach the wireless card connections, being careful not to crimp or bend the antenna. A B C Figure 24. Removing the system board 4.
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Updated August, 2006 Removing the control card 1. Remove the back cover as described in “Removing the back cover” on page 31. A B C Figure 25. Removing the control card 2. See Figure 25. Disconnect the control panel cable ( A ). 3. Remove the two screws ( B ) that hold the control card ( C ) in place, and lift out the card 4. To replace, reverse this procedure, being sure to angle the card such that the control buttons line up with the button holes. Note: Be sure to reinstall the grounding clip.
PAGE 6
Updated August, 2006 Removing the front panel card 1. Remove the back cover as described in “Removing the back cover” on page 31. 2. Remove the system board assembly as described in “Removing the system board” on page 40. Figure 26. Removing the front panel card 3. See Figure 26. Disconnect the speaker connections from the card ( E ). 4. Remove the touch cable ( A ) as follows: a. Locate the gray latches on either side of the cable. b. Pull backward on the latches to release. c.
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Updated August, 2006 Removing the backlight inverter card 1. Remove the back cover as described in “Removing the back cover” on page 31. 2. Disconnect and remove the hard drive fan as described in “Removing the hard drive fan” on page 35. 3. Remove the system board in “Removing the system board” on page 40. 4. Remove the insulating plastic sheet ( E in Figure 27). | | | E A B C D | | | | | Figure 27. Removing the backlight inverter card 5.
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Updated August, 2006 Removing the LCD 1. Remove the covers as described in “Removing the back cover” on page 31. A B Figure 28. Removing the LCD 2. Remove the eight screws ( A ) that hold the system board (main planar) and LCD assembly to the front bezel. Note: You do not need to remove the system board from the LCD assembly to remove the LCD. 3.
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Updated August, 2006 Figure 29. Replacing the LED assembly 7. To replace, see Figure 29 and follow these steps: a. Plug the signal cable to LCD. b. Place the assembly face up on a steady surface. c. Align the LCD with the LCD shield and thread the backlight cables through the holes. d. Replace the four screws holding the LCD. e. Turn the LCD assembly over. Replace the bezel and install the eight screws. f. Connect the backlight cables into the backlight inverter card. Chapter 4.
PAGE 10
Updated August, 2006 Replacing the front bezel 1. Remove the cover as described in “Removing the back cover” on page 31. E D C A B Figure 30. Replacing the front bezel 2. 3. 4. 5. Disconnect the touch cable ( A ) and control card cable ( B ). Remove the control card C . Disconnect the speakers ( D ) and lift to remove Remove the eight screws ( E ) that hold the LCD assembly (includes the system board) to the front bezel. 6.
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Updated August, 2006 Removing the mounting stand cover set To remove the cover set for the table-top mounting stand, follow these steps: Figure 31. Removing the stand cover set 1. Remove the arm cover ( B ) by pulling on the finger recess ( A in Figure 31) located on the top of the cover. Note: Extra pressure may be necessary. 2. Remove the base cover ( C ) by pulling the cover away from the display. 3. Snap out the cable shield. 4. To remove the plastic base housing, unfasten the four screws.
PAGE 12
Updated August, 2006 Removing the volume control card (Model 13V only) 1. Removing the cover as described in “Removing the back cover” on page 31. 2. Unplug the cable connected to the volume control card. A Figure 32. Removing the volume control card (Model 13V) 3. Remove the four screws that hold the volume control card and lift out. 4. To replace, reverse this procedure.
PAGE 13
Updated August, 2006 Chapter 5. Troubleshooting problems This section describes several problems and explains what to do to correct them. Condition description Resolution The power indicator on the terminal is off 1. Ensure that the 4836/4838 is powered on by depressing the power button on the terminal. 2. Check that you have power at the outlet. 3. Check that the ac cord is connected to the power supply. 4. Check that the power supply is properly plugged into the power port of the display. 5.
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Updated August, 2006 || | | | | Condition description Resolution Unacceptable image quality 1. Ensure that the video mode is set for 800 x 600 (12 inch models), 1024 x 768 (15 inch models), or 1280 x 1024 (17 inch models). 2. Run the service diskette. Magnetic stripe reader (MSR) malfunctioning 1. Check that the cable is securely connected. 2. Run the MSR test using the service diskette. 3. Replace the MSR. Table-top mount tilts too easily 1. Remove the arm cover and base top cover from the stand.
PAGE 15
Updated August, 2006 Appendix A. Field-replaceable units | Assembly 1: 4836/4838 Models 132, E32, 13V, and W2D (12 inch). Assembly 2: 4836/4838 Models 135, E35, and W5D (15 inch) . . Assembly 3: 4838 Models 137, E37, and W7D (17 inch). . . . . Assembly 4: Table-top stand and wall mount . . . . . . . . . Power cords . . . . . . . . . . . . . . . . . . . . . © Copyright IBM Corp. 2006 . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 16
Assembly 1: (continued) Updated August, 2006 Assembly 1: 4836/4838 Models 132, E32.