Sharp DV-RW250H (serv.man5) Service Manual ▷ View online
TROUBLESHOOTING GUIDE
E-35
NO AUDIO ON PLAYBACK
Is there AUDIO signal at
pin 26, 27 of IC7301 ?
No
No
Check IC7301
and peripheral circuit.
Yes
Yes
Check IC702
and peripheral circuit.
Is there waveform at pin
1, 7 of IC702 ?
Check J8001
and peripheral circuit.
TROUBLESHOOTING GUIDE
E-36
No
Check VCR block.
Yes
Check DVD DECK.
VIDEO CAN NOT
RECORD TO DVD
Is there a signal in at pin 17, 19
of CP7301 and at pin 1, 19 of
CP7302 with each input?
No
Yes
Check IC4001
and peripheral circuit.
Is there a signal in at pin
1~40 of CP4001 ?
No
Yes
Check IC4009
and peripheral circuit.
Is there a signal in at pin
79, 98, 128, 142 of
IC4001 ?
TROUBLESHOOTING GUIDE
E-37
No
Check VCR block.
Yes
Check DVD DECK .
AUDIO CAN NOT
RECORD TO DVD
Is there a signal in at pin 1~15
of CP7301 with each input?
Yes
Check IC4001
and peripheral circuit.
Is there a signal in at pin
1~40 of CP4001 ?
No
Yes
Check IC4009
and peripheral circuit.
Is there a signal in at pin 57,
100, 110 of IC4001 and at pin
2 of IC4010 ?
No
F P.CON+D5V
E P.CON+12V
D A5V
C D5V
B +3.3V
A +1.8V
TU_AUDIO_L/R
AUDIO_IN_L/R_1
AUDIO_IN_L/R_2
BS_AUDIO_L/R
ZR35100
IC4009
MPEG ENCODER
IC4001
ZR36750E
MPEG
RAMDAT16~31
RAMDAT0~15
RAMBA0~1
RAMADD0~12
RAMDQM/RAMWE/PCLK
RAMCAS/RAMRAS/RAMCS
ATDD0~15
ATCS0~1/ATDA0~2
ATIORDY/ATDMACK
ATIOW/ATIOR/ATINTRQ
DRVRST/ATDMARQ
A
B
VIDHS,VIDVS,VIDCLK,VIDVLD
SCL,SDA
VADDIS_INT,MPEG_CS,MPEG_CLK
MPEG_DATA_IN,MPEG_DATA_OUT
DATA LINE
B
B
256MBIT SDRAM
HY57V561620CT-7
IC4008
HY57V561620CT-7
256MBIT SDRAM
IC4007
TU_VIDEO
COMPOSITE_IN
VIDEO IN
Y_VIDEO_IN
AMCLK_SEL
VID0_7
SBVALID,SBDAT,SBCLK,SBREQ
I55_TX0,I55_RX0
MA0~12
MDQM/MWE/MCLK
MCAS/MRAS/MCS
MBA0~1
MD0~15
MD16~31
CVBSIN
VIDEO_IN_SEL
C_VIDEO_IN
ADC_ADAT
I55_ALRCLK,I55_ABCLK
I55_AMCLK
I55_AODAT
27M_OSC
VADDIS_AMCLK
ALRCLKO/ABCLKO/AOUT0
SCL,SDA
DAC_L/R
27M_OSC
VADDIS_AMCLK
DAC_L/R
SPDIF
YUV
CVBS_OUT
RAMADD2~4
RAMDAT3~4
RAMDAT10~12
PNVMCE
FRAMDAT16~31
FRAMDAT5~9
FRAMADD5~11
FRAMADD0~1
FRAMBA0~1
MPEG BLOCK DIAGRAM
B
B
C
D
B
B
B
B
A
B
B
F
E
1
RESET
BD5229G
IC4003
AUDIO IN
BR24L16FJ-WE2
EEPROM
IC4002
VIDEO OUT
AUDIO OUT
WM8776SEFT/R
AUDIO CODEC
IC7301
SN74LVC1G125DCKR
IC4010
AMCLK SW
2
4
1
1
2
4
6
MM1501XNRE
VIDEO SW
IC7302
DVR-R07OR
DVD-RW LODER
DK4001
CP4001
ATAPI FFC
04_6274_040_000_800
IC4006
64MBIT FLASH
LH28F640BFHE-PTTL80
IC4005
MT48LC8M16A2P-7E
128MBIT SDRAM
MT48LC8M16A2P-7E
128MBIT SDRAM
IC4004
F-1
F-2
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