ITC2
CHASSIS
R402/ R407/ R422/ R435/ R452/ R457/ R472/ R488
Troubleshooting
3-6-3. Component Troubleshooting Flow
Ch
k
Ch
k
Check
signal
source
or cable.
NG
Check
Input jack
‘J3002’
connection
NG
OK
OK
Component
NG / No
picture
Ref2
Ref3
Video Signal
Source problem or
cable problem
NG
Make sure jack
proper connection
to board
NG
OK
Ref2
Ref4
Confirm waveform at
IC5000 defect
OK
OK
Check input
signal 0.7Vp-p
at R3018_Y0P line ,
R3020_PB0P line &
R3021_PR0P line
C3015 (face to IC5000)
same as Ref2. Confirm
waveform at C3017 (face
to IC5000) same as Ref3.
Confirm waveform at
C3018 (face to IC5000)
NG
NG
same as Ref4. Input CB
pattern.
R3010, R3011, or
R3012
connection/defect
Confirm R3010,
C3010, R3018,
C3015 (Y0P line)
connection and value
Confirm R3011,
C3011, R3020,
C3017 (PB0P line)
connection and value
Confirm R3012,
C3012, R3021,
C3018 (PR0P line)
connection and value
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