Sony AVD-K700P / HT-V700DP Service Manual ▷ View online
17
AVD-K700P
(2) When the Y(Luminance) signal doesn’t appear on the screen in PB Mode,
Is 5V applied to the IC301
Pins23, 44, 45, 52, 68, 77?
Pins23, 44, 45, 52, 68, 77?
Is the Y/C Bus siganl
applied to the IC301
Pins53, 54, 55?
applied to the IC301
Pins53, 54, 55?
Does the normal RF signal
appear at the IC301 Pin 14?
appear at the IC301 Pin 14?
Check the line of the REG
5V Line. (Power Circuit)
5V Line. (Power Circuit)
Check the System Circuit.
(IC501 Pin18)
(IC501 Pin18)
Check the V.H.S/W level.
Refer to ‘SYSTEM Y/C
BUS CHECK Trouble
Shooting’.
BUS CHECK Trouble
Shooting’.
Is the V.H.S/W signal
applied to the IC301 Pin57?
applied to the IC301 Pin57?
Does the Rectangular
waveform(5V) appear at
the IC301 Pin57(V.H.S/W)
waveform(5V) appear at
the IC301 Pin57(V.H.S/W)
Clean the Drum.
Check the C324.
Check the R328, R347,
C322, C323.
C322, C323.
Does the Y(Luminance)
signal appear at the IC301
Pin20?
signal appear at the IC301
Pin20?
Is the Y(Luminance) Video
waveform showed up at the
IC301 Pin22?
waveform showed up at the
IC301 Pin22?
Replace the IC301.
NO
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
18
AVD-K700P
(3) When the C(Color) signal doesn’t appear on the screen in PB Mode,
Is 5V applied to the IC301
Pins23, 44, 45, 52, 68, 77?
Pins23, 44, 45, 52, 68, 77?
Does the fsc signal appear
at the IC301 Pins41, 50?
at the IC301 Pins41, 50?
Check the line of the REG
5V Line. (Power Circuit)
5V Line. (Power Circuit)
Replace the X301.
Check the C342, C341,
R333.
R333.
Is normal the X301
(3.58MHZ) of oscillation
Frequency?
(3.58MHZ) of oscillation
Frequency?
Replace the IC301.
Does the Color signal
appear at the IC301 Pin48?
appear at the IC301 Pin48?
Replace the IC301.
NO
YES
YES
YES
NO
NO
NO
19
AVD-K700P
(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)
(V.H/SW)
Replace the IC301.
Check the drum
*OPTION
Pins72, 73, 74(SP)
Pins65, 66, 67(EP)
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?
IC301 Pins41, 50?
NO
Check X301 oscillation
frequency.
frequency.
YES
Is the brightness signal sup-
plied to IC301 Pins18?
plied to IC301 Pins18?
Is 5V supplied to IC301
Pins23, 44, 45, 68, 77?
Pins23, 44, 45, 68, 77?
Check the power of Pins23,
44, 45, 52, 68, 77.
44, 45, 52, 68, 77.
Check the 5V power
NO
NO
NO
NO
NO
Is Y/C Bus applied to
IC301 Pins53, 54, 55?
IC301 Pins53, 54, 55?
Check the REG 5V power
Check system part
Do X301 and X-TAL
oscillate?
oscillate?
Check X301.
Is V.H SW supplied to
IC301 Pin57?
IC301 Pin57?
Does the FM signal appear
at IC301 Pins73(SP)/
66(EP)?
at IC301 Pins73(SP)/
66(EP)?
20
AVD-K700P
6. Tuner/IF CIRCUIT
(1) No Picture on the TV screen
No picture on the TV
screen
screen
Does the Video signal at
the TU701 Pin16.
the TU701 Pin16.
YES
YES
YES
Is +33V applied to TU701
Pin14?
Pin14?
YES
Is +5V applied to TU701
Pin3?
Pin3?
NO
Does the video signal
appear at IC302 Pin7.
appear at IC302 Pin7.
NO
Does the Video signal at
the IC501 Pin 52.
the IC501 Pin 52.
YES
NO
Does the Video signal at
the IC602 Pin 7.
the IC602 Pin 7.
YES
NO
Check the signal flow from IC602
Pin7 to JK601 Pin Video out.
Pin7 to JK601 Pin Video out.
YES
Check 33V line.
NO
Check 5V line.
NO
YES
Does the Clock signal
appear at TU701 Pin9?
appear at TU701 Pin9?
Check the lIC Clock Signal
of
of
µ
-COM Pin71.
NO
YES
Does the data signal
appear at TU701 Pin10?
appear at TU701 Pin10?
Replace Tuner.
Check the signal flow from
IC501 Pin27.(Pin27 is ‘L’
state in Tuner Mode)
IC501 Pin27.(Pin27 is ‘L’
state in Tuner Mode)
Check the signal from IC301
Pin26 to IC501 Pin50.
Pin26 to IC501 Pin50.
Check the signal from IC501 Pin52 to IC602 Pin1 and IC602 Pin2.
(IC602 Pin2 is ‘L’ state in VHS mode)
(IC602 Pin2 is ‘L’ state in VHS mode)
Check the lIC Data Signal
of
of
µ
-COM Pin72.
NO
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