Toshiba Dvr4xsu Owners Manual

TROUBLESHOOTING GUIDE
E-25
D-VR4XSU/D-VR4XSC
YES
YES
YES
YESNO
NO
NO
NO E-E AUDIO (STEREO)
DOES NOT APPEAR
Is the voltage at pin 25,
40 and 51 of IC701 5V ?Check POWER BLOCK.
Check POWER BLOCK.
Change IC701. Is there Audio signal at pin
9 and 14 of IC701 ?
Is there Audio signal at
pin 53 and 57 of
IC701?
Check circuit around of J8005.Check IC8301, J8002, J602
and J603.
Is the voltage at pin
58 of IC701 12V ? 

TROUBLESHOOTING GUIDE
E-26
D-VR4XSU/D-VR4XSC
YES
YES
YES
YESNO
NO
NO
NO TUNER AUDIO (MONO)
DOES NOT APPEAR.
Does E-E AUDIO
(MONO) appear ?Refer to section E-E AUDIO
(MONO) DOES NOT APPEAR.
Check circuit around  at pin
13 of TU301.
Change IC701.
Check IC701. Is there signal at pin
21 of IC801 ?
Is there audio signal at
pin 53 and 57 of IC701 ?
Is there audio signal
a emitter  of
Q8020 and Q8021 ?
Check circuit around of J8005. 

TROUBLESHOOTING GUIDE
E-27
D-VR4XSU/D-VR4XSC
YES YES
YES
YES
YES YESNO NO NO NONO
NO TUNER AUDIO (STEREO)
DOES NOT APPEAR.
Does TUNER AUDIO
(MONO) appear ?Refer to section TUNER AUDIO
(MONO) DOES NOT APPEAR.
Refer to section E-E AUDIO
(STEREO) DOES NOT APPEAR. Does E-E AUDIO
(STEREO) appear ?
At the time of channel
change,does the display of a
stereo come out to the screen ?
Is there audio signal at
pin 21 of IC801 ?Check circuit around of TU301.
Change IC701.
Check IC701. Is there audio signal
a...

TROUBLESHOOTING GUIDE
E-28
D-VR4XSU/D-VR4XSC
YES
YES
YES
YESNO
NO
NO
NO PB AUDIO (Hi-Fi)
DOES NOT APPEAR
Does E-E AUDIO
(STEREO) appear ?
Does NORMAL PB
AUDIO appear ?
Is there audio signal at
pin 22 and 24 of IC701 ?
Is there audio signal at
pin 53 and 57 of IC701 ?
Check circuit around of J8005.Refer to section E-E AUDIO
(STEREO) DOES NOT APPEAR.
Refer to section AT PLAY,
AUDIO DOES NOT APPEAR.
Check circuit of HEAD AMP
and CYLINDER UNIT.
Change IC701. 

TROUBLESHOOTING GUIDE
E-29
D-VR4XSU/D-VR4XSC
YES
YES
YES
YESNO NO NO NO Hi-Fi AUDIO
CAN NOT RECORD
Does E-E AUDIO appear ?
AT state of video recording,
is there audio signal at pin 9
and 14 of IC701 ?
Is there audio signal at pin
53 and 57 of IC701 ?
At recording and play, is
there signal at pin 7, 8
and 9 of CP101 ?
Check IC701.Check CYLINDER UNIT.Change IC701. Check circuit around of IC8301,
J601, J602, J8002 and TU301.Refer to section E-E AUDIO
(MONO) DOES NOT APPEAR. 

TROUBLESHOOTING  GUIDE
E-30
D-VR4XSU/D-VR4XSC
Yes
No
Yes
DECK DOES NOT ACCEPT
OPEN/CLOSE
Is the voltage at pin 1 of
CP504 about DC12V ?
and pin 4 of CP504 about
DC5V ?Check P.CON 12V and
P.CON+D5V line of
POWER BLOCK.
No Is the lose connection
at CD504 to CP504 and
DECK ?
Check CD504 connection
to CP504 and DECK.
Check DECK.
(DVD SECTION) 

TROUBLESHOOTING  GUIDE
E-31
D-VR4XSU/D-VR4XSC
E-E DOES NOT APPER AT
DVD MODE
No
Yes
No
Yes
No
Yes
Check VCR block.
Check IC8501 and
peripheral circuit. Check IC8501 and
peripheral circuit.
Check VCR block. Is there a signal in at pin
54, 62~64, 66~69, 71, 72
and 73 of IC8501 with each
output mode ? Is there a signal in at
pin 5, 11, 19 and 54 of
IC8501 ? Is there a signal in at
pin 1, 3 and 5 of
CP7304 ? 

TROUBLESHOOTING  GUIDE
E-32
D-VR4XSU/D-VR4XSC
E-E AUDIO
DOES NOT APPEAR
No
NoCheck VCR block.
Yes Yes
Check IC4001 and peripheral
circuit.
Is there a signal in at
pin 1, 2 and 3 of IC7301 ?
Is there a signal in at pin 2, 4, 6
and 8 of CP7303 with each
input ?
No
Yes Is there a signal in at pin 1, 2,
11, 12 and 15 of IC7302 and
F10, D9 and A6 of IC4001 ?Check IC7302, IC4001 and
peripheral circuit.
Go to NO AUDIO ON
PLAYBACK.
No
YesCheck IC7301 and peripheral
circuit. Is there a signal in at
pin 7 and 8 of...

TROUBLESHOOTING  GUIDE
E-33
D-VR4XSU/D-VR4XSC
TUNER AUDIO OF DVD MODE
DOES NOT APPEAR
No
NoCheck IC8301 and peripheral
circuit.
Yes Yes
Check IC4001 and peripheral
circuit.
Is there a signal in at
pin 1, 2 and 3 of IC7301 ?
Is there a signal in at pin 2
and 4 of CP7301 with each
input ?
No
Yes Is there a signal in at pin 1, 2,
11, 12 and 15 of IC7302 and
F10, D9, A6 of IC4001 ?Check IC7302, IC4001 and
peripheral circuit.
Go to NO AUDIO ON
PLAYBACK.
No
YesCheck IC7301 and peripheral
circuit. Is there a...

TROUBLESHOOTING  GUIDE
E-34
D-VR4XSU/D-VR4XSC
NO PLAYBACK PICTURE
OF AV JACK
Check IC4001 and peripheral
circuit.Is there VIDEO signal
at pin A9 and D11 of
IC4001 ?No
Yes
Is the waveform at pin
30 of IC8301 ?No
YesCheck IC8301 and peripheral
circuit.
Check J8005 and peripheral
circuit.