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4. TROUBLE SHOOTING
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ʹΠΡΪΣΚΘΙΥ͑ι ͣͨ͑͡͡ͽ͑ͶΝΖΔΥΣΠΟΚΔΤ͑͟ͺΟΔ͑͑͟ͲΝΝ͑ΣΚΘΙΥ͑ΣΖΤΖΣΧΖΕ͑͟
ΟΝΪ͑ΗΠΣ͑ΥΣΒΚΟΚΟΘ͑ΒΟΕ͑ΤΖΣΧΚΔΖ͑ΡΦΣΡΠΤΖΤ
ͽͶ͑ͺΟΥΖΣΟΒΝ͑ΆΤΖ͑ΟΝΪ
4. TROUBLE SHOOTING
4.12 KEY backlight Trouble
TEST POINT
Figure 4.12.1
CIRCUIT
1u
C246
10Kohms
R229
s
mh
o0
65
R222
s
mh
o0
65
R230
1u
C258
R228
s
mh
o0
65
R224
s
mh
o0
65
s
mh
o0
65
R221
s
mh
o0
65
R227
LD201
19-217_BHC-ZM1N2QY_3T
LD202
LD203
LD204
Q202
KTC4075E
1
2
3
LD205
VBAT
2.2u
C283
LD206
KEY_BACKLIGHT
KEY BACKLIGHT