Display - Ericsson T18s Trouble-Shooting Instruction

5 Display.

5.1 Kind of fault.
Insert a fully charged battery into the phone and start it up by pressing the On/Off
key.
• If it doesn't start, proceed to chapter 3, "Doesn't start"-fault.
• If the display is missing one or more of the segments, proceed to section 5.2.
• If there's nothing displayed in the display, proceed to section 5.3.
• If the display is completely black (all the segments are "lit"), proceed to section
5.2 Segments are missing.
Open the phone and check for liquid damages.
Replace the display.
5.3 There's nothing displayed in the display.
Insert a dummy battery into the phone, start it up and check the current consump-
tion.
• If the phone consumes more than 200mA, make sure the display isn't mechani-
• If the phone consumes less than 200mA, open the phone and check for liquid
Give the board power and start it up.
Measure the voltage at the display pads (H623, fig. 5.1).
Pad 1:
Pad 2:
Pad 3:
Pad 4:
Pad 5:
5.3.
cally damaged.
* If it isn't, replace the elastomer and try again.
* If that doesn't help, replace the display and try again.
* If the current consumption still is too high, proceed to chapter 3,
"Doesn't start"-fault.
damages.
VLCD
VDIG
2
I CDAT
GND
2
I CCLK
4/00021-2/FEA 209 544/12.B
T18s, T18sc Standard Electrical Repairs
~5.8V
~3.2V
~3.2V
~3.2V
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