Toshiba 23HL85 Service Manual page 34

Process B
Check the Input / Output
IC450
Pass
Ref.2/2-1/2-2
Check the input/output
of IC701
Pass
Ref.3
Check the input/output
of IC501
Pass
Check input source cable
and jack
Component Y signal Iutput :
Ref.2
IC701(Switching IC), #3
V_sync Input :
Ref.2-2
IC701(Switching IC) #13
Re- soldering or Change
The defect part of IC450,
Fail
IC451
Check level(0W)
of R724
Fail
Re- soldering or Change
The defect part of IC501,
Fail
X500, IC701
H_sync Input :
Ref.2-1
IC701(Switching IC) #23
Component Y signal Iutput :
Ref.3
IC501(Scaler IC) #147
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Check short circuits of
Main B/D
Fail
Pass
Re-soldering or Change
IC701