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3-11
4-2. When the Y(Luminance) signal doesn’t appear on the screen in PB Mode,
NO
YES
Is 5.0VT,
5.3VA applied to the
IC301 Pins24, 42, 55,
72, 91?
Check the line of the 5.0VT,
5.3VA Line. (Power Circuit)
NO
YES
YES
Does the
normal RF signal
appear at the IC301
Pin78?
YES
Is the
V.H.S/W signal
applied to the IC301
Pin70?
Clean the Drum.
NO
Check the System Circuit.
(IC501 Pin23)
YES
Is V.H.S/W “H”
about 3.4V at the
IC301 Pin70?
NO
Check the V.H.S/W level.
(Check R303, R304)
NO
Replace the IC301.
NO
YES
NO
Does the
Y(Luminance) RF
signal appear at the
IC301 Pin79?
Check the path of the
Y(Luminance) RF signal.
(Check the C312)
Check the path of the
Y(Luminance) RF signal.
(Check C327)
YES
NO
YES
YES
Is the
Y(Luminance) Video
waveform showed up
at the IC301
Pin43?
YES
Is the I
2
C
Bus siganl applied
IC301 to the Pins68,
69?
Refer to “SYSTEM I
2
C BUS
Check Trouble Shooting”.
When the Y(Luminance)
signal doesn’t appear on
the screen in PB Mode,
Replace the IC301.
VCR ELECTRICAL TROUBLESHOOTING GUIDE
Summary of Contents for DVP3350V/01
Page 17: ...2 8 MEMO ...
Page 45: ...3 37 3 38 5 TUNER CIRCUIT DIAGRAM ...
Page 51: ...3 49 3 50 IC301_LA71750EM IC501_MN101D10X IC801_TDA9605H IC751_MSP3417 3407 ...
Page 52: ...3 51 3 52 PRINTED CIRCUIT BOARD DIAGRAMS 1 MAIN P C BOARD TOP SIDE ...
Page 53: ...3 53 3 54 2 MAIN P C BOARD BOTTOM SIDE ...
Page 54: ...3 55 3 56 3 POWER P C BOARD ...
Page 55: ...3 57 3 58 4 KEY P C BOARD ...
Page 77: ...3 80 MEMO ...
Page 78: ...3 81 3 82 CIRCUIT DIAGRAMS 1 MPEG CIRCUIT DIAGRAM ...
Page 79: ...3 83 3 84 2 SERVO CIRCUIT DIAGRAM ...
Page 80: ...3 85 3 86 3 JACK CIRCUIT DIAGRAM ...
Page 113: ...4 32 MEMO ...
Page 119: ...5 6 MEMO ...
Page 121: ...5 9 5 10 MEMO MEMO ...