Sony DVP-FX740DT Service Manual ▷ View online
8-4
DVP-FX740DT
START
Power on
Power
green LED
on
Do all
the buttons work
normally?
Does
remote control work
normally?
Check P_3V3
Does
U7 (MT1389LP)
OK?
Does IR1 work
by testing waveform
normally?
Is the Battery
OK?
Check
J4 on the
MAIN board
Replace
U7 (MT1389LP)
Replace battery
Replace IR1
Check the buttons
Is P_3V3 OK?
Check power
3. Front Circuit
YES
YES
YES
NO
YES
YES
YES
YES
YES
NO
YES
NO
NO
NO
NO
NO
NO
Do the U6
work normally?
Replace U6
YES
NO
Check U6
Replace U6
NO
Check U7
(MT1389LP)
Replace
U7 (MT1389LP)
NO
YES
8-5
DVP-FX740DT
Put disc in?
Disc ID is correct?
Does
spindle
rotate?
rotate?
Focus on OK?
Track on OK?
Disc is play?
Check RF signal waveform
Proper signal
on A, B, C, D of
U7 (MT1389LP)?
Proper
F+&F- signal on
U7 (MT1389LP)?
Proper
FOSO signal on
U7 (MT1389LP)?
Check the related
circuit on U7 (MT1389LP)
Check the TRSO connection
on U7 (MT1389LP)
and motor driver
Check the tracking
control amp circuit
on motor driver
Proper
TRSO signal on
U7 (MT1389LP)?
T+&T- out
properly?
Check cable connection on pick up head
Check the cable connection on pick up head
Check the related
circuit on U7 (MT1389LP)
F+&F- signal
Check connection
between U7 (MT1389LP)
and pick up head
Check the RF
connection between HA1 and
U7 (MT1389LP)
Proper
DMSO signal on
U7 (MT1389LP)?
Check the cable connection between spindle and main PCBA
Check the related
circuit on U7 (MT1389LP)
RF signal
Check DMSO related
circuit on U7 (MT1389LP)
No disc (laser off)
4. RF/Servo Circuit
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
8-6E
DVP-FX740DT
Display condition
3V3 normal
5V normal
1.8V normal
VGH normal
VGL normal
LED+ normal
TU1 normal
VCOM normal
R, G, B signal output
TFT LCD normal
Check TCN2
Check TCN2
Check TU6, FB4
Check TZD2, TZD3, U5
Check TZD2, TZD3, U5
Check TL1, TU2, TZD1
Check TU1
Check U4
Check TR2, TR6, TR7
Replace
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
Appear shadow from interference in black background
8-2. LCD TROUBLE SHOOTING GUIDE
9-1
DVP-FX740DT
SECTION 9
REPAIR PARTS LIST
9-1. EXPLODED VIEWS
9-1-1. TOP COVER BLOCK
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
1
9-885-103-46
FOOT RUBBER (091-0001-261)
2
9-885-130-28
SCREW PAD (091-0001-774)
3
A-1742-552-A KEY BOARD ASY (02-06047421-00-A)
4
A-1742-550-A UPPER COVER ASSY (030-0003-801)
5
9-885-130-09
DISC LID SPRING (024-0001-1543)
6
A-1742-551-A DISC LID ASSY (030-0006-804)
7
9-885-108-32
SHEET, OPEN PREVE (086-0001-041)
NOTE:
• -XX and -X mean standardized parts, so they
• -XX and -X mean standardized parts, so they
may have some difference from the original one.
• Color Indication of Appearance Parts
Example:
KNOB, BALANCE (WHITE) . . . (RED)
Example:
KNOB, BALANCE (WHITE) . . . (RED)
↑
↑
Parts Color Cabinet’s Color
• Items marked “*” are not stocked since they are
seldom required for routine service. Some delay
should be anticipated when ordering these items.
should be anticipated when ordering these items.
• The mechanical parts with no reference number
in the exploded views are not supplied.
• Accessories and packing materials are given in
the last of the electrical parts list.
1
3
1
4
5
6
7
2
not supplied
not supplied
not supplied
not supplied
LCD Panel Block
Bottom Block
not supplied
not supplied
not supplied
not supplied
not supplied
not supplied
not supplied
not supplied
not supplied
not supplied
(TS2X7)
(TS2X7)
not supplied
(TS2X7)
(TS2X7)
not supplied
(TS2X7)
(TS2X7)
not supplied
(TS2X7)
(TS2X7)
not supplied
(2X3.5)
(2X3.5)
not supplied
(2X3.5)
(2X3.5)
not supplied
(2X3.5)
(2X3.5)
not supplied
(M2.5X12)
(M2.5X12)
The components identified by mark or dotted
line with mark are critical for safety.
Replace only with part number specified.
line with mark are critical for safety.
Replace only with part number specified.
Click on the first or last page to see other DVP-FX740DT service manuals if exist.