Panasonic TOUGHBOOK CF-45 Series Service Manual page 44

ras |
4.3.5 LCD DIANOSIS
Make sure that connecting cables; connectors and AC adapter are not loose or disconnected prior to testing.
: " Ref. Page
No: Symptom: ~ a | a eedune ng senha Component Shematic
- lo. Diagrams
1 | No picture appears on the Does the LCD display Yes Brigniness aes eke
screen. v{ 4-1-]-properly afier brightness [~~ | adjustment
level is adjusted? NO | Go to No. 1-2 — —=
Replace the LCD. YES | LCD — ie
1-2 | Does operation return to
formal? : NO | Goto No. 1-3 — —
Replace the Main PCB. YES |.Main PCB 1C13 Main 12
1-3 | Does operation return to
normal?
NO | Go to No. 1-4
_
—
' Replace the LCD cable. YES | LCD cable — —
1-4] Does operation return to No LCD connector = ae
normal? PCB
2 | Display is too dark or too Does the LCD display | veg Brigntness do a
bright. 2-1} properly after brightness adjustment f
level is adjusted? Go to No. 2-2 ——= =
Replace the LCD. Lop. aa as
2-2 |.Does operation return to
normal?
Go to No. 2-3
=
=
Replace the Main PCB, < Main 13
2-3|| Does operation return to | VES | Main Ce 142 Main 26
normal? i Go to No, 2-4
Replace the LCD cable. YES | LCD cable = —
2-4 Does opration return to LCD connector 2s es
normal?. - PCB
3. | Part of the screen does Replace the LCD. tcp
not display properly. 3-1 | Does operation return to
Display quality poor. " | normal." NO | Go to No. 3-2
(Fuzzy or slanted, etc.) Replace the Main PCB. YES | Main PCB
: 3-2 | Does operation return to
normat? NO }j Go to No. 3-3 —=
Replace the LCD cable. YES | LCD cable —
3-3 | Does operation return to No LCD connector = ==
normal? PCB
4 | Backlight does not turn on. Replace the Inverter PCB. YES | inverter PCB = —
4-1 | Does operation returnt o
normal? NO | Go to No. 4-2 rece —
Replace the Inverter cable. YES | Inverter cable — —
4-2 | Does operation return to
normat? NO | Go to No. 4-3 ae: =
|__| Replace the backlight. YES | Backlight — —_
43 | Does operation return to . CNt1 Main 13
normal? RO: Mane Ic42 Main 26