Read Sharp DV-HR400H (serv.man2) Service Manual online
21
DV-HR400S/H
DV-HR450S
DV-HR480S/H
Is video signal input to IC2601 pins
18, 13, 23 and 28?
Is luminance signal input to IC2201
pin 1? Is video signal input to
IC2201 pin 2?
Is chroma signal input to IC2201
pins 3 and 5?
FLO
W CHAR
T No.9
Image E-E does not appear
.
1
In external video input mode
■
Check line between rear SCAR
T
L1 terminal (SC2601) and IC2601
pin 23.
■
Check line between rear SCAR
T
L2 terminal (SC2602) and IC2601
pin 28.
■
Check line between front video input 3 terminal (J2702) and IC2601
pin 13.
2
In external S input mode
■
Check line between front S
Y
input 3 terminal (J2701) and IC2201 pin 1.
■
Check line between front S C input 3 terminal (J2701) and IC2201pin 3.
3
In U/V tuner mode
Check line between pin 19 of U/V tuner (TU1501) and IC2601 pin 18.
YES
YES
NO
Is video signal input to pins of main unit
connector CN3001?
CN3001 pin 1 CVBS/Y
signal
CN3001 pin 3 C signal
NO
In external video input 1/2/3 mode, U/V tuner
mode:
Is video signal output to IC2601 pin 5?
Is 12V applied to IC2601 pin 14? Is 5V applied to
IC2601 pin 24?
Check or replace IC2601.
Check 12V line and STNBY
5V .
For 12 V line, check IC2691 12V
REG,
A
T14 line of IC2691 pin 1,
and STBY
CTL
line of IC2691 pin
2.
NO
YES
YES
NO
YES
YES
NO
Is signal input to pin 22 IIC_SCL
and pin 21 IIC_SDA
controlling IC2601?
Check IIC_SCL
and IIC_SDA
lines.
YES
NO
YES
In external S input 1/2/3 mode:
Is luminance signal output to IC2201
pin 15?
Is chroma signal output to IC2201
pin 4?
Is S JACK (H) of IC2201 pins 9 and 10 "H" level?
Is F_SJACK(front
AUX3) line of pin 28 of IC501 "L"
level?
NO
Check lines between IC501 pin 30 and IC2201 pins 9
and 10.
Check F_SJACK(front
AUX3) line.
Check circuits and lines between IC2201 pin 15 and
CN3001 pin 1 and between IC2201 pin 4 and CN3001
pin 3.
IC2201 pin 15
→
Q2204
→
CN2202 pin 1
→
CN3001
pin 1 CVBS/Y
signal
IC2201 pin 4
→
CN2202 pin 3
→
CN3001 pin 3 C signal
Is video signal input to each pin of IC3502?
IC3502 pin 23 CVBS/Y
signal
IC3502 pin 8 C signal
NO
Check lines between pins of CN3001 and IC3502 as
well as circuits on lines.
CN3001 pin 1
→
Q3502, 3505, 3501
→
IC3502 pin 23
CVBS/Y
signal
CN3001 pin 3
→
Q3512, 3514, 3516
→
IC3502 pin 8 C
signal
3
YES
NO
Check 1.8V line, 1.8VREG.IC3504 and peripheral circuits.
Check YCDEC_RST
line.
NO
Are D_3.3V (1) and
A_3.3V applied to each pin
of IC3502?
Check D_3.3V (1) and
A_3.3V lines.
Is 1.8V applied to each pin of IC3502?
YES
NO
After power on, is IC3502 pin 34
YCDEC_RST
line at "L" level and changed to "H" level?
YES
NO
Is digital data VDI_656 [0-7] output to each pin
of IC3502?
IC 3502 pins 43,44,45,46,47,50,51, and 52
VDI_656 [0-7]
Check IC3502 and peripheral circuits.
NO
IC7508 pin 236 (Q7506 B)
Y(V
A
Y
)
IC7508 pin 235 (Q7505 B) C(V
AC)
IC7508 pin 62 (Q7501 B) G/Y(V
AG)
IC7508 pin 153 (Q7503 B) B/U(V
AB)
IC7508 pin 61 (Q7502 B) R/V(V
AR)
Check IC7508 and peripheral circuits.
3
YES
NO
CN3001 pin 25 _Y
CN3001 pin 27 _C
CN3001 pin 24 _V
CN3001 pin 20 _G/Y
CN3001 pin 21 _B/U
CN3001 pin 22 _R/V
YES
Refer to Flow chart No.6/No.7 "Playback
images do not appear properly".
Check lines between pins of IC7508 and CN3001 as well as
circuits on lines.
IC7508 pin 235
→
Q7505
→
CN3001 pin 27_C
IC7508 pin 62
→
Q7501
→
CN3001 pin 20_G/Y
IC7508 pin 153
→
Q7503
→
CN3001 pin 21_B/U
IC7508 pin 61
→
Q7502
→
CN3001 pin 22_R/V
NO
Are signals VIDICLK, input to IC7508?
IC7508 pin 144 VIDICLK.
Check VIDICLK.
YES
YES
NO
Is digital data VDI_656 [0-7] input to each pin of
IC7508?
IC7508 pins 49,50,51,143,227,228,229,and
305 VDI_656 [0-7]
YES
Check lines between pins of IC3502 and IC7508 as well as
circuits on lines.
IC 3502 pins 43,44,45,46,47,50,51, and 52
→
IC7508 pins
49,50,51,143,227,228,229,and 305.
FLO
W CHAR
T No.10
V
ideo signal recording is impossible.
Is E-E signal output?
YES
NO
NO
Are drive controls of IC7508 and HDD working
properly?
Refer to Flow chart No.2 "Drive is not working properly
(communication failure with IC7508)" or Flow chart No.3
"HDD is not working properly (communication failure with
IC7508)".
Refer to Flow chart No.9 "Image E-E does not appear".
Refer to Flow chart No.4 "Recording is impossible
(MPEG stream check)".
YES
Is video signal output to each pin of IC7508?
Is video signal output to each pin of CN3001?
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