Sharp DV-HR300U, Service Manual

Page: 19 / 76

19
DV-HR300U
Is video signal output to pins of main unit connector CN3001? CN3001 pin 18 154_G/Y CN3001 pin 19 154_B/U CN3001 pin 20 154_R/V
FLOW CHART No.8
Playback images do not appear properly (from
Y/C
B
/C
R
output).
NO
YES
NO
Is video signal input to each pin of IC2502? IC2502 pin 9 154_Y IC2502 pin 14 154_P
B
IC2502 pin 1 154_P
R
YES
NO
Is 5V applied to IC2502 pin 13? Is IC2502 pin 12 PROGRE (H) at "H" level? Check PC_5V (1) line.
Is video signal input to each pin of IC2502? IC2502 pin 6 COM_Y IC2502 pin 5 C
B
IC2502 pin 3 C
R
YES
NO
Check lines between pins of IC2501 and pins of IC2502. IC2502 pin 6
→
IC2501 pin 10 COM_Y
IC2502 pin 5
→
IC2501 pin 12 C
B
IC2502 pin 3
→
IC2501 pin 14 C
R
Is video signal input to each pin of IC2501? IC2501 pin 10 COM_Y IC2501 pin 12 C
B
IC2501 pin 14 C
R
NO
YES
Check or replace IC2502.
YES
Check PROGRE (H) line.
NO
Check circuits and lines between pins of main unit connector CN3001 and input pins of IC2502. CN3001 pin 18
→
S2202 pin 18
→
Q251
1, 2514, 2518
→
IC2502 pin 9 154_Y CN3001 pin 19
→
S2202 pin 19
→
Q2512, 2515
→
IC2502 pin 14 154_ P
B
CN3001 pin 20
→
S2202 pin 20
→
Q2513, 2516
→
IC2502 pin 1 154_ P
R
Check line between IC2501 pin 20 and component
Y
terminal
(J2403) as well as component terminal (J2403)? Check line between IC2501 pin 18 and component P
B
terminal
(J2403) as well as component terminal (J2403)? Check line between IC2501 pin 16 and component P
R
terminal
(J2403) as well as component terminal (J2403)? Check line between IC2501 pin 20 and DY
terminal (CN2401)
as well as D terminal (CN 2401)? Check line between IC2501 pin 18 and D P
B
terminal (CN2401)
as well as D terminal (CN 2401)? Check line between IC2501 pin 16 and D P
R
terminal (CN2401)
as well as D terminal (CN 2401)?
YES
NO
Is 5V applied to IC2501 pins 1 and 28? Is IC2501 pin 13 at "H" level? Check PC_5V (1) line.
Is video signal output to each pin of IC2501? IC2501 pin 20 COMPO_Y IC2501 pin 18 C
B
_OUT
IC2501 pin 16 C
R
_OUT
YES
NO NO NO NO NO NO
Is video signal output to each output terminal? Is
Y
signal output to component terminal
(J2403)? Is P
B
signal output to component terminal
(J2403)? Is P
R
signal output to component terminal
(J2403)? Is
Y
signal output to D terminal (CN2401)?
Is P
B
signal output to D terminal (CN2401)?
Is P
R
signal output to D terminal (CN2401)?
NO YES
Check or replace IC2501.
YES
YES
Is
T_V_MUTE line at "L" level?
NO
Check Q2510 and R2515.
Check T_V_MUTE
line.
NO
Is video signal input to IC2203 pins 1, 8, 15, 23 and 47? Is luminance signal input to IC 2203 pins 3, 10 and 17? Is chroma signal input to IC 2202 pins 5, 12 and 19?
FLOW CHART No.9
Image E-E does not appear
.
1
In external video input mode
■
Check line between rear video input 1 terminal (J2401) and IC2203 pin 8.
■
Check line between rear video input 2 terminal (J2402) and IC2203 pin 15.
■
Check line between front video input 3 terminal (J2702) and IC2203 pin 1.
2
In external S input mode
■
Check line between rear S
Y
input 1 terminal (J2401) and IC2203 pin 10.
■
Check line between rear S
Y
input 2 terminal (J2401) and IC2203 pin 17.
■
Check line between front S
Y
input 3 terminal (J2701) and IC2203 pin 3.
■
Check line between rear S C input 1 terminal (J2401) and IC2203 pin 12.
■
Check line between rear S C input 2 terminal (J2401) and IC2203 pin 19.
■
Check line between front S C input 3 terminal (J2701) and IC2203 pin 5.
3
In U/V tuner mode
Check line between pin 18 of U/V tuner (TU1501) and IC2203 pin 47.
4
In BS tuner mode
Check line between pin 18 of BS tuner (TU1701) and IC2203 pin 23.
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 or BS tuner mode: Is video signal output to IC2203 pin 43?
Is 9V applied to IC2203 pin 34? Check or replace IC2203.
Check PC_9V line.
NO
YES
YES
NO
YES YES
NO
Is signal input to pin 26 PLL_SCL
and pin 27 PLL_SDA
controlling IC2203?
Check PLL_SCL
and
PLL_SDA
lines.
YES
NO
YES
In external S input 1/2/3 mode: Is luminance signal output to IC2203 pin 43? Is chroma signal output to IC2203 pin 45?
Are these lines at "L" level: IC501 pin 29
AUX1_S_SOCK (rear
AUX1), pin 64
AUX3_S_SOCK (rear
AUX2), and pin 28
F_SJACK (front
AUX3)?
NO
Check these lines:
AUX1_S_SOCK (rear
AUX1),
AUX3_S_SOCK (rear
AUX2) and F_SJACK (front
AUX3). Check circuits and lines between IC2203 pin 43 and CN3001 pin 1 and between IC2203 pin 45 and CN3001 pin 3. IC2203 pin 43
→
Q2207
→
S2202 pin 1
→
CN3001 pin 1
CVBS/Y
signal
IC2203 pin 45
→
Q2208
→
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
1
Refer to Flow chart No.5 "Playback video signal is not output from main PWB".