Display Does Not Work; Buzzer Does Not Work; Fig 12 Fault Tree, Display - Nokia RH-13 Series Troubleshooting Manual

RH-13
Troubleshooting

Display does not work

Display does not work
Check that phone
powers up norm ally
(current consumption,
power up sequence)
OK
Check display visually
(possible cracks on
COG driver or glass,
capacitors loose or
broken
OK
Check PW B and
elastomer
connector
OK
Run LCD test in
Phoenix
(BB Self Tests/
ST_LCD_TEST)
OK
Use Display Test
in Phoenix to
check if display
works
FAIL
Replace
display m odule

Buzzer does not work

Check spring connectors and C306.
Page 24
Figure 12: Fault tree, display
Proceed to phone
FAIL
doesn't power up
troubleshooting
Replace
FAIL
display m odule
Clean PW B and
replace
FAIL
elastom er if
needed
Check
capacitors
FAIL
C302...C304
OK
Replace
elastomer
ãNokia Corporation
CCS Technical Documentation
In any phase of display
troubleshooting use Display Test in
Phoenix to produce test patterns on
display.
Also check with a known good
display module to see if it works.
Replace
FAIL
capacitors(s)
Replace
FAIL
display module
Issue 1 11/02