Panametrics CTF878, Service Manual

Page: 52 / 67

Chapter 5.
42 Model CTF878 Service Manual
5.1.6 Replacing the LCD Display
The CTF878’s measurements are displayed on a two-pane LCD graphic display panel. The LCD display normally
provides years of dependable service, but it is easily field-replaceable when necessary. To replace the LCD display,
see Figure on page 43 for the component locations, and complete the following steps:
WARNING!
The main power to the CTF878 must be disconnected before proceeding.
1. Open the cover on the electronics console.
2. Disconnect the white-ribbon display cable from connector J7, open the two cable brackets (inside the enclosure
and on the inside surface of the cover), and free the display cable. See Figure 1-2 on page 11.
3. Using a 3/16 inch nutdriver, remove the four nut/washer sets that secure the display shroud to the inside of the
console cover. Lift the display shroud off its mounting studs.
4. Using a 1/4” nutdriver, remove the four standoffs that secure the LCD display assembly to the console cover. Lift
the LCD display assembly off its mounting studs.
5. Place the new LCD display assembly over the mounting studs on the console cover (in the same orientation as
the one being replaced) and secure it with the four standoffs.
CAUTION!
Do not overtighten the standoffs or the display assembly may be damaged.
6. Install the display shroud over the mounting studs with the bent edges on the top and bottom extending toward
the cover.
7. Fasten the display shroud to the console cover with the four sets of nuts and washers.
CAUTION!
Do not overtighten the nuts or the mounting threads may be damaged.
8. Feed the white-ribbon display cable through the cable brackets, close the brackets, and connect the cable to
connector J7 .