Read Sharp DV-HR300H (serv.man8) Service Manual online
17
DV-HR300S/HR350S
DV-HR300H
DV-HR300X
DV-HR300H
DV-HR300X
Is video signal output to pins of main unit
connector CN3001?
CN3001 pin 23 154_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
Refer to Flow chart No.5 "Playback video signal is not output
from main PWB".
YES
NO
Is video signal input to pins of sub unit IC2802
and 2801?
IC2802 pin 2 OSD_Y_IN
IC2801 pin 1 OSD_PB_IN
IC2801 pin 14 OSD_PR_IN
YES
YES
Is 5V applied to IC2802 pin 7?
Is 5V applied to IC2801 pin 13?
Is video signal input to pins of IC2802 and
2801?
IC2802
pin 8 OSD_Y
IC2801
pin 3
IC2801
pin 5
pin 6
YES
NO
NO
NO
Check lines between pins of IC2802, IC2801 and 2803 and
pins of IC2502.
IC2801 pin 8
→
IC2502 pin 8 OSD COM_Y
IC2801 pin 1
→
IC2502 pin 1
1
OSD_P
B
IC2801 pin 14
→
IC2502 pin 16 OSD_P
R
Is video signal input to each pin of IC2502?
IC2502 pin 8 OSD COM_Y
IC2502 pin 1
1
OSD_P
B
IC2502 pin 16 OSD_P
R
NO
Check or replace
IC2801.
YES
YES
Check or replace
IC2801.
Check PC_5V (1) line.
Check PC_5V (1) line.
NO
Is voltage of 5V supplied to IC2801 pin 13?
Is each video signal output to each pin of
IC2803?
IC2803
pin 3 OSD P
B
pin 5 OSD P
R
pin 6 OSD COM
Y
YES
NO
Check or replace
IC2801.
YES
Check PC_5V (1) line.
NO
Check circuits and lines between pins of main unit connector
CN3001 and input pins of IC2802/2801.
CN3001 pin 23
→
S2202 pin 23
→
Q2502, 2504, 2507
→
IC2802 pin 2 OSD_Y_IN
CN3001 pin 19
→
S2202 pin 19
→
Q2512, 2515
→
IC2801 pin 1 OSD_ P
B
_IN
CN3001 pin 20
→
S2202 pin 20
→
Q2513, 2516
→
IC2801 pin 14 OSD_ P
R
_IN
YES
NO
Is 5V applied to IC2502 pin 13?
Is IC2502 pin 12 PROGRE (H) line at "L" level?
STNDBY_5V line.
Is video signal input to each pin of IC2502?
IC2502 pin 6
IC2502 pin 5
IC2502 pin 3
YES
NO
YES
Check or replace
IC2502.
YES
Check PROGRE (H) line.
NO
NO
Check lines between pins of IC2502 and IC2503.
IC2502 pin 6
→
IC2503 pin 9
IC2502 pin 5
→
IC2503 pin 14
IC2502 pin 3
→
IC2503 pin 1
Is video signal input to each pin of IC2503?
IC2503 pin 9
IC2503 pin 14
IC2503 pin 1
YES
NO
Is 5V applied to IC2503 pin 13?
Is IC2503 pin 12 (DVD (H) line) at "H" level?
Check PC_5V (1) line.
Is video signal output to each pin of IC2503?
IC2503 pin 6 COM_Y
IC2503 pin 5 C
B
IC2502 pin 3 C
R
NO
YES
Check or replace
IC2503.
YES
Check DVD (H) line.
NO
2
2
YES
Check line from IC2505 pin 15 to IC2681 pin 6.
Check IC2681 pin 2 output.
Check line from IC2505 pin 12 to SCAR
T
L1 terminal (SC2601)
and SCAR
T
L1 terminal (SC2601).
Check line from IC2505 pin 10 to SCAR
T
L1 terminal (SC2601)
and SCAR
T
L1 terminal (SC2601).
NO
NO
NO
Is each video signal output to SCAR
T
L1 output
terminal?
Is R OUT
signal output to SCAR
T
L1 output
terminal?
Is G OUT
signal output to SCAR
T
L1 output
terminal?
Is B OUT
signal output to SCAR
T
L1 output
terminal?
YES
Check Q2510.
Check T_V_MUTE
line.
NO
NO
Check line from each pin of IC2503 to each pin of IC2505.
IC2503 pin 6
→
IC2505 pin 4 COM_Y
IC2503 pin 5
→
IC2505 pin 6 CB
IC2503 pin 3
→
IC2505 pin 2 CR
Is each video signal input to each pin of
IC2505?
IC2505 pin 4 COM_Y
IC2505 pin 6 C
B
IC2505 pin 2 C
R
YES
NO
Is voltage of 5V supplied to IC2505 pins 1, 5, 14 and 16?
Is IC2505 pin 3 "H" level?
STNDBY_5V line.
Is each video signal output to to each pin of
IC2505?
IC2505 pin 15 R_OUT
IC2505 pin 12 G_OUT
IC2505 pin 10 B_OUT
NO
YES
Check or replace
IC2505.
YES
Is
T_V_MUTE line "L" level?
NO
NO
Check S OUT
(H)
line.
Check or replace IC2681.
YES
Is voltage of 5V supplied to IC2681 pin 3?
YES
Check STNDBY
5V line.
NO
Is IC2681 pin 1 "L" level?
YES
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