3-17
6. TUNER/IF CIRCUIT
(A) No Picture on the TV screen
No picture on the TV
screen
Does the Video signal at
the TU701 Pin19.
YES
YES
YES
Is 33VT applied to TU701
Pin17?
YES
Is 5VT applied to TU701
Pin4?
NO
Does Sync appear at
IC501 Pin111.
NO
Does the Video signal at
the IC501 Pin47.
YES
NO
Does the Video signal at
the IC301 Pin61.
YES
NO
NO
Does the Video signal at
the IC903 Pin6.
Check the signal flow from IC903
Pins26, 27 to SC901 Pin19.
YES
YES
Check 33V line.
NO
Check 5V line.
NO
YES
Does the Clock signal
appear at TU701 Pin12?
Check the lIC Clock Signal
of μ-COM Pin18.
NO
YES
Does the data signal
appear at TU701 Pin13?
Replace Tuner.
Check the signal flow from
TU701 Pin19 to IC301 Pin48.
Check the signal from IC301
Pin65 to IC501 Pin49.
Check the signal from IC501
Pin47 to IC301 Pin56.
Check the signal from IC903
Pin6 to IC301 Pin61.
Check the lIC Data Signal
of μ-COM Pin17.
NO
Summary of Contents for DVP3350V
Page 35: ......
Page 52: ...3 51 3 52 IC301_LA71750EM IC801_TDA9605H IC501_MN101D10X IC751_MSP3417 3407 ...
Page 53: ...3 53 3 54 PRINTED CIRCUIT DIAGRAMS 1 MAIN P C BOARD TOP SIDE ...
Page 54: ...3 55 3 56 2 MAIN P C BOARD BOTTOM SIDE 2 MAIN P C BOARD BOTTOM SIDE ...
Page 56: ...3 59 3 60 4 KEY P C BOARD ...
Page 57: ...3 61 3 62 ...
Page 71: ...3 76 FIG 7 2 DVD FIG 7 3 CD FACT FACT FE FE SBAD SBAD ...
Page 72: ...3 77 FIG 7 4 CD 8 FOCUS ON WAVEFORM FIG 8 1 DVD FE FOSO FACT FACT FACT FE SBAD ...
Page 78: ...3 83 2 Audio Related Signal FIG 14 2 AOUT0 ABCK ALRCLK ...
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