3-15
3. Y/C CIRCUIT
(4) When the Video signal doesn’t appear on the screen in REC Mode,
YES
YES
YES
YES
YES
YES
NO
NO
YES
YES
YES
YES
YES
Check system part
(V.H/SW)
Replace IC301.
Check the drum
*OPTION
Pins72, 73, 74(SP)
Pins65, 66, 67(EP)
REC mode
Check the EE mode
NO
Is EE mode normal?
Is color normal?
A
A
YES
YES
Is brightness normal?
Does signal appear at
IC301 Pins41, 50?
NO
Check X301 oscillation
frequency.
YES
Is the brightness signal sup-
plied to IC301 Pins18?
Is SW 5V supplied to IC301
Pins23, 44, 45, 68, 77?
Check the power of Pins23,
44, 45, 52, 68, 77.
Check the SW 5V power.
NO
NO
NO
NO
NO
Is Y/C Bus applied to
IC301 Pins53, 54, 55?
Check the SW 5V power
Check system part
Do X301 and X-TAL
oscillate?
Check X301.
Is V.H SW supplied to
IC301 Pin57?
Does the FM signal appear
at IC301 Pins73(SP)/
66(EP)?
Содержание ZDX-313
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Страница 40: ...3 35 3 36 2 TU IF CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T PB REC...
Страница 43: ...3 41 3 42 5 JACK CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T...
Страница 49: ...3 53 3 54 PRINTED CIRCUIT DIAGRAMS 1 MAIN P C BOARD TOP SIDE...
Страница 50: ...3 55 LOCATION GUIDE...
Страница 51: ...3 56 LOCATION GUIDE...
Страница 52: ...3 57 3 58 2 MAIN P C BOARD BOTTOM SIDE...
Страница 53: ...3 59 3 60 4 KEY P C BOARD LOCATION GUIDE 3 POWER P C BOARD LOCATION GUIDE...
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Страница 69: ...3 75 10 ZR36868 AUDIO OPTICAL AND COAXIAL OUTPUT SPDIF FIG 10 1 11 ZR36868 VIDEO OUTPUT WAVEFORM 1 100 FIG 11 1...
Страница 70: ...3 76 12 ZR36868 AUDIO OUTPUT TO AUDIO DAC 2 COMPOSITE VIDEO SIGNAL FIG 11 2 FIG 12 1...
Страница 71: ...3 77 FIG 13 1 13 AUDIO OUTPUT FROM AUDIO DAC...
Страница 75: ...3 81 3 82 A B C D E F G H I J K L M N O P Q R S T CIRCUIT DIAGRAMS 1 SYSTEM CIRCUIT DIAGRAM...
Страница 76: ...3 83 3 84 2 SERVO CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T...
Страница 77: ...3 85 3 86 3 AV JACK CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T...
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