Read Sharp DV-HR300H (serv.man8) Service Manual online
18
DV-HR300S/HR350S
DV-HR300H
DV-HR300X
DV-HR300H
DV-HR300X
Is video signal input to IC2601 pins
18, 13, 23 and 28?
Is luminance signal input to IC2251
pin 1? Is video signal input to
IC2251 pin 2?
Is chroma signal input to IC2251
pins 3 and 5?
FLOW CHART 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 IC2251 pin 1.
■
Check line between front S C input 3 terminal (J2701) and IC2251pin 3.
3
In U/V tuner mode
Check line between pin 24 of U/V tuner (TU1501) and IC2601 pin 18.
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 IC2251
pin 15?
Is chroma signal output to IC2251
pin 4?
Is S JACK (H) of IC2251 pins 9 and 10 "H" level?
Is F_SJACK(front
AUX3) line of pin 28 "L" level?
NO
Check lien between IC501 pin 30 and IC2251 pins 9
and 10.
Check F_SJACK(front
AUX3) line.
Check circuits and lines between IC2251 pin 15 and CN3001
pin 1 and between IC2251 pin 4 and CN3001 pin 3.
IC2251 pin 15
→
Q2254
→
S2202 pin 1
→
CN3001 pin 1
CVBS/Y
signal
IC2251 pin 4
→
S2202 pin 3
→
CN3001 pin 3 C signal
Is video signal input to each pin of IC3502?
IC3502 pin 135 CVBS/Y
signal
IC3502 pin 149 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 135
CVBS/Y
signal
CN3001 pin 3
→
Q3504, 3507, 3503
→
IC3502 pin 149 C
signal
3
YES
NO
Check 1.5V line, 1.5VREG.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 1.5V applied to each pin of IC3502?
YES
NO
After power on, is IC3502 pin 84
YCDEC_RST
line at "L" level and changed to "H" level?
YES
NO
Is 3.3V applied to each pin of IC3503?
Check D_3.3V (1) line.
YES
NO
NO
Is clock signal SDRCLK input to IC3503 pin 35?
Is digital data
YC_656 [2-9] output to each pin of
IC3502?
IC 3502 pins 56, 58, 59, 61, 62, 64, 65 and 67
YC_656 [2-9]
Check SDRCLK line between IC3502 pin 17 and IC3503 pin 35.
Check IC3502 and peripheral circuits.
YES
NO
Is video signal output to each pin of IC7506?
IC7506 pin 218 (R7743)
Y
(Q7506 pin 5 B)
IC7506 pin 214 (R7744) C (Q7505 pin 5 B)
IC7506 pin 245 (R7724) CB (B_U) (Q7503 B)
IC7506 pin 224 (R7737) CR (R_V) (Q7502 B)
Check IC7506 and peripheral circuits.
3
YES
NO
Is video signal output to each pin of CN3001?
CN3001 pin 23 I54_Y
CN3001 pin 25 I54_C
CN3001 pin 19 CB (I54_B/U)
CN3001 pin 20 CR (I54_R/V)
YES
Refer to Flow chart No.6/No.7 "Playback images do
not appear properly".
Check lines between pins of IC7506 and CN3001 as well as circuits
on lines.
IC7506 pin 218 (R7743)
→
Q7506
→
Q7509
→
IC7512
→
Q7510
→
CN3001 pin 23 154_Y
IC7506 pin 214(R7744)
→
Q7505
→
CN3001 pin 25 I54_C
IC7506 pin 245 (R7724)
→
Q7503
→
CN3001 pin 19 I54_B/U
IC7506 pin 224 (R7737)
→
Q7502
→
CN3001 pin 20 I54_R/V
NO
Are signals VIDICLK, VIDIHD and VIDIVD input to
each pin of IC7506?
IC7506 pin 184 VIDICLK, pin 177 154_VIDIHD, pin
178 154_VIDIVD
Check VIDICLK, VIDIHD and VIDIVD lines.
YES
YES
NO
Is digital data VDI_656 [0-7] input to each pin of
IC7506?
IC7506 pins 194, 186, 187, 188, 189, 181, 182 and
183 VDI_656 [0-7]
YES
Check lines between pins of IC3502 and IC7506 as well as circuits
on lines.
IC 3502 pins 56, 58, 59, 61, 62, 64, 65 and 67
→
IC3507
→
IC7506
pins 194, 186, 187, 188, 189, 181, 182 and 183
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