Sharp DV-HR300U, Service Manual

Page: 22 / 76

22
DV-HR300U
Is audio signal input to IC6101 pins 1, 2, 4, 5, 1
1, 12, 14 and 15?
FLOW CHART No.12
Sound E-E is not output.
1
In external input mode
■
Check lines between rear audio input 1 terminal (J2401) and IC6101 pins 5/14.
■
Check lines between rear audio input 2 terminal (J2701) and IC2461 pins 3/13
as well as lines between IC2461 pins 4/14 and IC6101 pins 4/1
1.
■
Check lines between front audio input terminal (J2702) and IC6101 pins 2/15.
2
In U/V tuner mode
Check these: periphery of U/V tuner (TU1501), line between pin 15 of U/V tuner and IC1401 pin 15, periphery of IC1401, and lines between IC1401 pins 24/23 and IC6101 pins 1/12.
NO
Is audio signal input to each pin of IC6102? IC6102 pin 3 INPUT_L IC6102 pin 5 INPUT_R
NO
Is audio signal output to each pin of IC6101? IC6101 pin 3 INPUT_L IC6101 pin 13 INPUT_R
Is 5V applied to IC6101 pin 16, and -5V applied to pin 7? Check or replace IC6101. Check PC_5V (1) line and PC_-5V line.
NO
YES YES
YES
NO
Are voltages of control signal lines
T_A
MUTE,
AUX2 (H)
and
AUX1 (H) of pins 6/9/10 controlling IC6101 normal?
Check each control signal line.
Check PC_5V (1) line and PC_-5V line.
YES
NO
Check EE_AMCLK line.
NO
Check lines between pins of IC6101 and IC6102. IC6101 pin 3
→
IC6102 pin 3 INPUT_L
IC6101 pin 13
→
IC6102 pin 5 INPUT_R
Is audio signal output to pins of main unit connector CN3001? CN3001 pin 8
AUD_L_ADIN
CN3001 pin 7
AUD_R_ADIN
NO
Check lines between pins of IC6102 and CN3001. IC6102 pin 1
→
S2202 pin 8
→
CN3001 pin 8
AUD_L_ADIN IC6102 pin 7
→
S2202 pin 7
→
CN3001 pin 7
AUD_R_ADIN
Is audio signal input to each pin of IC3002? IC3002 pin 13
AUD_L_ADIN
IC3002 pin 3
AUD_R_ADIN
NO
YES YES
Check lines between pins of CN3001 and IC3002. CN3001 pin 8
→
IC3002 pin 13
AUD_L_ADIN
CN3001 pin 7
→
IC3002 pin 3
AUD_R_ADIN
1
NO NO
YES
Refer to Flow chart No.1
1 "Playback sound is not
output properly".
Check or replace IC3005.
YES YES
Check IC7506 or peripheral circuits.
1
YES
NO NO
Is audio digital signal output to each pin of IC7506? IC7506 pin 235 154_AMCLK IC7506 pin 217 154_ABCLK IC7506 pin 222 154_ALRCK IC7506 pin 209 154_ADA
T
A
Is audio digital signal output to each pin of IC7506? IC7506 pin 248
AD_DOUT
IC7506 pin 221
AD_BCK
IC7506 pin 230
AD_LRCK
Is audio digital signal output to each pin of IC3005? IC3005 pin 9
AD_DOUT
IC3005 pin 12
AD_BCK
IC3005 pin 10
AD_LRCK
Is audio signal output to each pin of IC3005? IC3005 pin 2
AUD_L_ADIN
IC3005 pin 1
AUD_R_ADIN
ICheck lines between pins of IC3005 and IC7506. IC3005 pin 9
→
IC7506 pin 248
AD_DOUT
IC3005 pin 12
→
IC7506 pin 221
AD_BCK
IC3005 pin 10
→
IC7506 pin 230
AD_LRCK
YES
Is audio signal output to each pin of IC6102? IC6102 pin 1 INPUT_L IC6102 pin 7 INPUT_R
Is 5V applied to IC6102 pin 8, and -5V applied to pin 4?
NO
Is 5V applied to IC3005 pin 6, and 3.3V applied to pin 7?
Is EE_AMCLK signal input to IC3005 pin 1
1
?
Check
A_5V line and D_3.3V (1) line.
YES
YES
YES
YES
NO
Check lines between pins of IC3003 and IC3005. IC3003 pin 7
→
IC3005 pin 2
AUD_L_ADIN
IC3003 pin 1
→
IC3005 pin 1
AUD_R_ADIN
YES YES
Is audio signal output to each pin of IC3003? IC3003 pin 7
AUD_L_ADIN
IC3003 pin 1
AUD_R_ADIN
Is 5V applied to IC3003 pin 8, and -5V applied to pin 4? Check
A_5V line and PC_-5V line.
NO
YES NO
Check IC3003 peripheral circuits or replace IC3003.
IIs audio signal output to each pin of IC3003? IC3003 pin 5
AUD_L_ADIN
IC3003 pin 3
AUD_R_ADIN
NO
YES
Check lines between pins of IC3002 and IC3003. IC3002 pin 14
→
IC3003 pin 5
AUD_L_ADIN
IC3002 pin 4
→
IC3003 pin 3
AUD_R_ADIN
Is audio signal output to each pin of IC3002? IC3002 pin 14
AUD_L_ADIN
IC3002 pin 4
AUD_R_ADIN
Is 5V applied to IC3002 pin 16, and -5V applied to pin 7? Check
A_5V line and PC_-5V line.
NO
YES NO
Check IC3002 peripheral circuits or replace IC3002.