Table of Contents
Advertisement
190 Series III
Service Manual
4. Carefully slide the PCA out of the holes for the BNCs and Banana Jacks (2-ch Test Tools).
The A, B, and Meter input circuits are covered with an isolation foil.
5. Take careful notice on how the foil is positioned around the PCA before you remove the foil
as far as required to repair a defective channel.
6. Remove a screw M3x22 that fixes the top and bottom screening of the suspected channel.
7. Reinsert the flat cables if you want to measure the bottom side of the PCA under working
condition. See
Before you attach the PCA again to the lower chassis plate, place the isolation foils
around the channels.
Access to LCD, Keypad Foil, and Keypad
To access:
1. Unlock both flat cables by shifting the connector latch at the left and right edge using a
small screwdriver. The latch is an integral part of the connector body.
2. Remove the flat cables from connector X9303 (to LCD) and J9414 (to keyboard).
3. Remove 6 self-tapping screws 10 mm long (total length) that fix the Main PCA module to
the top case assembly.
4. Separate the Main PCA module from the top case.
Now you have access to LCD-module, keypad foil and keypad. They can be separated from
the top case without the removal of screws or clamps.
5. To prevent contamination, wear cotton gloves or do not touch contact areas with your
hands.
When installing the LCD-module into the top case, take care that no dust or dirt is
present between module and the window/decal.
Before reinstalling the Main PCA module on to the top case, place the grey plastic strip
around the BNC inputs.
58
Figure
22,
Figure
23, and
Figure
24.
Note
Note
Advertisement
Table of Contents
