Sony DVP-FX705 Service Manual ▷ View online
9-8
C.
E
Audio
DAC received
correct data stream?
Normal
Audio DAC
out? (IC301)
Check Audio filter, amplify, mute
circuit. (IC301 Application circuit)?
circuit. (IC301 Application circuit)?
Check connection between MT1389
& Audio DAC. (Check VRST, ACLK,
ABCK, ASDAT0)
& Audio DAC. (Check VRST, ACLK,
ABCK, ASDAT0)
Check the related circuit of
Audio DAC. (Check Audio
out Pin 14, 15,18,19)
Audio DAC. (Check Audio
out Pin 14, 15,18,19)
9-9
* Chargeing Circuit
No turn on
+8.25V, +17V, -15V
+8.25V, +17V, -15V
Is J601_Pin1 OK?
Is L601, C613, C614,
R610 OK?
R610 OK?
Is Q601 OK?
Is IC601 OK?
Replace L601, C613,
C614, R610?
C614, R610?
Replace Q601
Replace IC601
9-10
9-2. LCD TROUBLE SHOOTING GUIDE (1/2)
DISPLAY CONDITION?
INVERTOR ABNORMAL
appear shadow form interference
in black background
in black background
There is only bright light.(LCD B/D abnormal)
+8.25V, +17V, -15V Check and Replace
T801, D8F1, D8F2, D8F3 Check
Main B/D on located
IC901 Check and Replace(Key B/D Located)
IC801, IC804 Check
Q8F1 Normal operate?
+8.8V, +16V, -10V Normal?
+5V Normal?
+3.3V, +2.5V Normal?
YES
YES
NO
NO
NO
NO
YES
YES
YES
X801 Replace
IC801 Check and Replace
IC802, IC803 Check and Replace
X801 operate?
R.G.B signal output?
VCOM signal?(4.6Vpp)
NO
NO
NO
YES
YES
YES
9-11
9-3. LCD TROUBLE SHOOTING GUIDE (2/2)
VIDEO_Y, VIDEO_C
IC501, Key B/D Check
IC501, Key B/D Check
SDA, SCL signal
TFT LCD Normal?
Replace
Color Bright Adjusting Normal?
IC801 Check
Each CONNECTOR?
Replace and Reassemble
INVERTOR Normal?
Replace
END
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
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