DOWNLOAD Sharp DX-AT50H (serv.man15) Service Manual ↓ Size: 32.7 KB | Pages: 6 in PDF or view online for FREE

Model
DX-AT50H (serv.man15)
Pages
6
Size
32.7 KB
Type
PDF
Document
Service Manual
Brand
Device
DVD / Troubleshooting
File
dx-at50h-sm15.pdf
Date

Sharp DX-AT50H (serv.man15) Service Manual ▷ View online

DX-AT50H
– 58 –
FLOW CHART NO.15
[No Disc] indicated. (When the focus servo is not functioning.)
FLOW CHART NO.16
[No Disc] indicated. (When the laser beam does not light up.)
FLOW CHART NO.17
Both functions of picture and sound do not operate normally. 
Replace the DVD Main CBA Unit.
Replace the DVD Mecha.
No
Yes
Replace the DVD Main CBA Unit.
Replace the DVD Mecha.
No
Yes
Replace the DVD Main CBA Unit.
Replace the DVD Mecha.
No
Yes
No improvement can be found.
The malfunction of the original DVD Main CBA Unit. 
No improvement can be found.
The malfunction of the original DVD Main CBA Unit. 
No improvement can be found.
The malfunction of the original DVD Main CBA Unit. 
FLOW CHART NO.14
[No Disc] indicated. (When the focus error occurs.)
Replace the DVD Main CBA Unit.
No improvement can be found.
The malfunction of the original DVD Main CBA Unit. 
Replace the DVD Mecha.
No
Yes
– 59 –
DX-AT50H
FLOW CHART NO.18
Picture does not appear normally.
Set the disc on the disc tray, and playback.
Are the following video signals inputted into each 
pin of IC1402 ?
Replace the DVD Main CBA Unit or DVD Mecha .
Is 5V voltage applied to the pin (1, 3, 5, 34) of 
IC1402 ?
Check or replace IC1402 ?
Check the periphery of JK1401 from 
Pins (30) of IC1402.
Check the peripheryof JK1401 from 
Pin (27) of IC1402.
Check the periphery of JK1401 from 
Pin (33) of IC1402.
Check the periphery of JK1602 from 
Pins (18, 21, 24) of IC1402.
Are the following video signals outputted to each 
pin of IC1402 ?
Are the video signals outputted to the specific 
output terminal ?
Are the composite video signals outputted to the 
VIDEO OUT terminal (JK1401) ?
Are the luminance signals outputted to the 
S-OUT terminal (JK1401) ?
Are the chroma signals outputted to the 
S-OUT terminal (JK1401) ?
Are the component video signals outputted to the 
Video OUT terminal (JK1602) ?
Yes
Yes
Yes
No
No
No
No
No
No
IC1402     4 PIN   CVBS
IC1402     6, 12 PIN   S-Y
IC1402     2 PIN   S-C
IC1402   14 PIN   Cb
IC1402   16 PIN   Cr
IC1402   30 PIN    CVBS
IC1402   24, 27 PIN    S-Y
IC1402   33 PIN    S-C
IC1402   21 PIN    Cb
IC1402   18 PIN    Cr
DX-AT50H
– 60 –
FLOW CHART NO.19
Audio is not outputted.
Set the disc on the disc tray and playback.
Are the analog audio signals outputted to each pin 
of IC801 ?
Do the base of Q1203 and Q1204 become the 
"H" level ?
IC801   7 PIN   AUDIO-L
IC801   8 PIN   AUDIO-R
IC1201   1PIN   AUDIO-L
IC1201   7PIN   AUDIO-R
IC1201   2PIN   AUDIO-L
IC1201   6PIN   AUDIO-R
Replace the DVD Main CBA Unit or DVD Mecha.
Replace the DVD Main CBA Unit.
Check or replace IC1201.
Check the periphery between Pins (1,7) of IC1201 
and JK1201.
Check each line between each pin of IC801 
and each pin of IC1201.
IC801   7 PIN 
 IC1201   2 PIN   AUDIO-L
IC801   8 PIN 
 IC1201   6 PIN   AUDIO-R
Are the analog audio signals inputted to each pin 
of IC1201 ?
Are the analog audio signals outputted to each pin 
of IC1201?
Are the audio signals outputted to the specific 
output terminal ?
Are the audio signals outputted to the L/R OUT 
terminal (JK1201) ?
Yes
Yes
Yes
Yes
No
No
No
No
No
DX-AT50H
– 60 –
FLOW CHART NO.19
Audio is not outputted.
Set the disc on the disc tray and playback.
Are the analog audio signals outputted to each pin 
of IC801 ?
Do the base of Q1203 and Q1204 become the 
"H" level ?
IC801   7 PIN   AUDIO-L
IC801   8 PIN   AUDIO-R
IC1201   1PIN   AUDIO-L
IC1201   7PIN   AUDIO-R
IC1201   2PIN   AUDIO-L
IC1201   6PIN   AUDIO-R
Replace the DVD Main CBA Unit or DVD Mecha.
Replace the DVD Main CBA Unit.
Check or replace IC1201.
Check the periphery between Pins (1,7) of IC1201 
and JK1201.
Check each line between each pin of IC801 
and each pin of IC1201.
IC801   7 PIN 
 IC1201   2 PIN   AUDIO-L
IC801   8 PIN 
 IC1201   6 PIN   AUDIO-R
Are the analog audio signals inputted to each pin 
of IC1201 ?
Are the analog audio signals outputted to each pin 
of IC1201?
Are the audio signals outputted to the specific 
output terminal ?
Are the audio signals outputted to the L/R OUT 
terminal (JK1201) ?
Yes
Yes
Yes
Yes
No
No
No
No
No
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