Sony AVD-K150B / AVD-K150E / AVD-K150G / AVD-K150N / AVD-K150R / DAV-D150B / DAV-D150E / DAV-D150G / DAV-D150N Service Manual ▷ View online
21
AVD-K150B/K150E/K150G/K150N/K150R
Does the CFG signal appear at the
PMC01 Pin1?
PMC01 Pin1?
Does the PWM signal appear at the
IC501 Pin108?
IC501 Pin108?
Does 2.8V appear at the PMC01?
Check the PMC01 and the Capstan
Motor Ass’y.
Motor Ass’y.
Does the Capstan PWM signal appear at
the IC501 Pin108?
the IC501 Pin108?
Aren’t the foil patterns and Components
between IC501 Pin108 and PMC01
Pin9 short?
Pin9 short?
Does the CFG signal come into the
IC501 Pin9?
IC501 Pin9?
Aren’t the foil patterns and Components
between IC501 Pin108 and PMC01
Pin9 short?
Pin9 short?
(3) When the Capstan Motor doesn’t run,
NO
NO
NO
YES
YES
YES
When the Capstan Motor doesn’t run,
Does 12VA appear at the PMC01?
YES
Replace the IC501.
YES
NO
NO
YES
Refer to “SMPS(CAPSTAN/12Volt)
Trouble Shooting”.
Trouble Shooting”.
Aren’t the foil patterns and component
between IC501 Pin9 and PMC01
Pin1 short?
Pin1 short?
Check the Capstan Motor Ass’y.
NO
22
AVD-K150B/K150E/K150G/K150N/K150R
(4) KEY doesn’t working
KEY doesn’t working.
Is 5V applied to the IC501
Pin36?
Pin36?
Does LED or FLD change
when a function button is
pressed?
when a function button is
pressed?
Refer to “SMPS 5.3VA
Trouble Shooting”.
Trouble Shooting”.
Replace the defective
switches.
switches.
YES
NO
NO
23
AVD-K150B/K150E/K150G/K150N/K150R
4. Y/C CIRCUIT
(1) No Video in EE Mode,
No Video in EE Mode
Check the 24Pin of Tuner.
Does the Video signal
appear at the IC301 Pin48?
appear at the IC301 Pin48?
Is 5V applied to the IC301
Pins18, 24, 42, 55, 72, 91?
Pins18, 24, 42, 55, 72, 91?
Does the Video signal
appear at the IC301 Pin65?
appear at the IC301 Pin65?
Does the Video signal
appear at the IC501 Pin19?
appear at the IC501 Pin19?
Does the Video signal
appear at the Emitter termi-
nal of the Q307, Q308?
appear at the Emitter termi-
nal of the Q307, Q308?
Check the 5.2VT, 5.3VA
Line. (Power Circuit)
Line. (Power Circuit)
Is I
2
C BUS signal applied to
the IC301 Pins68, 69?
Check C316. (AGC)
Chck the path of the signal
between the IC301 Pin65
and IC501 Pin17.
between the IC301 Pin65
and IC501 Pin17.
Replace the IC301.
Does the 12VT, 5.3VA
appear at the Emitter termi-
nal of the Q804, Q308.
appear at the Emitter termi-
nal of the Q804, Q308.
Replace the Q804, Q308.
Check the 12VT, 5.3VA
Line. (Power Circuit)
Line. (Power Circuit)
Check the System Circuit.
(Refer to ‘SYSTEM I
(Refer to ‘SYSTEM I
2
C BUS
CHECK Trouble Shooting’)
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
24
AVD-K150B/K150E/K150G/K150N/K150R
3. Y/C CIRCUIT
(2) When the Y(Luminance) signal doesn’t appear on the screen in PB Mode,
Is 5.2VT, 5.3VA applied to the
IC301 Pins24, 42, 55, 72, 91?
IC301 Pins24, 42, 55, 72, 91?
Is the I
2
C Bus siganl applied
to the IC301 Pins68, 69 ?
Does the normal RF signal
appear at the IC301 Pin78?
appear at the IC301 Pin78?
Check the line of the 5.2VT,
5.3VA Line. (Power Circuit)
Check the System Circuit.
(IC501 Pin105)
(IC501 Pin105)
Check the V.H.S/W level.
(Check R303, R304)
(Check R303, R304)
Replace the IC301.
Refer to ‘SYSTEM I
2
C BUS
CHECK Trouble Shooting’.
Is the V.H.S/W signal
applied to the IC301 Pin70?
applied to the IC301 Pin70?
Is V.H.S/W “H” about 3.4V
at the IC301 Pin70?
at the IC301 Pin70?
Clean the Drum.
Check the path of the
Y(Luminance) RF signal.
(Check C327)
Y(Luminance) RF signal.
(Check C327)
Check the path of the
Y(Luminance) RF signal.
(Check the C312)
Y(Luminance) RF signal.
(Check the C312)
Does the Y(Luminance) RF
signal appear at the IC301
Pin76?
signal appear at the IC301
Pin76?
Is the Y(Luminance) Video
waveform showed up at
theIC301 Pin43?
waveform showed up at
theIC301 Pin43?
Replace the IC301.
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
YES
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