Sony KD-28DX50U Service Manual ▷ View online
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Troubleshooting
Here are some simple solutions to problems which may affect the picture and sound.
Problem
Cause
Solution
No picture, no sound.
•
Power off.
•
TV in standby.
•
Aerial disconnected.
•
Plug in the TV.
•
If the
1
indicator is lit, press the
TV I/
1
button on the remote control.
•
Press the
!
button on the front of the
TV.
•
Check aerial connection.
Poor or no picture (screen is dark), good
sound.
sound.
•
Low picture settings.
•
Access the ‘Picture Adjustment’
menu and adjust the ‘Brightness’,
‘Colour’ and ‘Contrast’ settings.
Refer to page 21.
menu and adjust the ‘Brightness’,
‘Colour’ and ‘Contrast’ settings.
Refer to page 21.
No picture on any channel after digital
tuning.
tuning.
•
No digital transmissions in your area.
•
Weak signal.
•
Unsuitable aerial.
•
Tune in all available analogue
channels. Refer to ‘Manual
Programme Preset’ on page 24.
Contact a local installer to find out
when digital transmissions begin in
your area.
channels. Refer to ‘Manual
Programme Preset’ on page 24.
Contact a local installer to find out
when digital transmissions begin in
your area.
•
Ensure aerial/satellite dish is
correctly aligned to transmitter.
correctly aligned to transmitter.
•
Ensure aerial is plugged directly into
the TV (not through other
equipment).
the TV (not through other
equipment).
•
Upgrade to a higher gain aerial.
•
Upgrade to a higher gain aerial.
Some channels are blank.
•
Scrambled/Subscription only
channel.
channel.
•
Channel not being transmitted.
•
Channel used only for data (no
picture or sound).
picture or sound).
•
Subscribe to the pay-per-view
service.
service.
•
Contact the broadcaster for
transmission details
transmission details
Standby indicator flashing.
•
Digital programme set for ‘Timer
Record’ (regular flash).
Record’ (regular flash).
•
Fault (irregular flashing).
•
Refer to ‘The Info menu’ on page 18.
•
Do not open the cabinet, refer to
qualified personnel.
qualified personnel.
•
Contact your nearest
Service Centre.
Good picture, no sound
•
Low or muted volume
•
Press the
2
+ button on the remote
control.
•
If
%
is displayed, press the
%
button
on the remote control.
No colour on colour programmes.
•
Low colour level settings.
•
Access the ‘Picture Adjustment’
menu and adjust the ‘Colour’ setting.
Refer to page 21.
menu and adjust the ‘Colour’ setting.
Refer to page 21.
Remote control does not work.
•
Batteries low.
•
Wrong mode selected
•
Replace batteries.
•
Press the Mode Selector button
repeatedly to select TV mode.
repeatedly to select TV mode.
Distorted picture when changing
programmes or selecting text.
programmes or selecting text.
•
Connected equipment switched on.
•
Switch off external equipment (VCR,
DVD player etc.)
DVD player etc.)
•
If you continue to have these problems, have your TV serviced by qualified
personnel or contact the
personnel or contact the
UK Digital HelpLine on 0870 600 1717.
•
NEVER open the casing yourself.
Specifications
TV System
I/DVB-T
Colour System
PAL
NTSC 3.58, 4.43 (only Video In)
MPEG-2 MP@ML
NTSC 3.58, 4.43 (only Video In)
MPEG-2 MP@ML
Channel Coverage
UHF:
B21-B69
Picture Tube
KD-28DX50: FD Trinitron WIDE Approx. 71cm (28inches)
KD-32DX50: FD Trinitron WIDE Approx. 82cm (32inches)
KD-32DX50: FD Trinitron WIDE Approx. 82cm (32inches)
Sound Output
Left/Right:
2x14W (music power), 2x7W (RMS)
Power Consumption
KD-28DX50: 97W
KD-32DX50: 97W
KD-32DX50: 97W
Dimensions (w x h x d)
KD-28DX50: Approx. 788 x 571 x 563 mm
KD-32DX50: Approx. 886 x 620 x 592 mm
KD-32DX50: Approx. 886 x 620 x 592 mm
Weight
KD-28DX50: Approx. 45kg
KD-32DX50: Approx. 61kg
KD-32DX50: Approx. 61kg
Rear Terminals
i
1/
21-pin Euro connector (CENELEC
standard) including audio/video input,
RGB input, TV audio/video output.
standard) including audio/video input,
RGB input, TV audio/video output.
i
2/
r
21-pin Euro connector (CENELEC
standard) including audio/video input,
S-VIDEO input, selectable audio/
video output.
standard) including audio/video input,
S-VIDEO input, selectable audio/
video output.
1
RF In (Digital)
2
RF In (Analogue)
RF Out
Audio output - phono jacks.
PCMCIA (for future use only).
MODEM
MODEM jack (for service only).
Front Terminals
i
Headphone jack - minijack stereo.
r
3
S-Video input - 4 pin DIN
t
3
Video input - phono jack.
o
3
Audio input - phono jack.
Supplied Accessories
RM-933 remote control (1)
IEC designated size AA (R03) battery (2)
RF Lead.
IEC designated size AA (R03) battery (2)
RF Lead.
Design and specification are subject to change without notice.
- 14 -
SECTION 2
DISASSEMBLY
To remove lift the main bracket rear slightly and slide the
chassis away from the beznet. Ensure that the interconnecting
leads are released from their purse locks to prevent damage
being caused.
chassis away from the beznet. Ensure that the interconnecting
leads are released from their purse locks to prevent damage
being caused.
When refitting the chassis ensure that the main
bracket is located in the beznet guide slots before
sliding the chassis forwards. Refit the
interconnecting leads in their respective purse locks.
bracket is located in the beznet guide slots before
sliding the chassis forwards. Refit the
interconnecting leads in their respective purse locks.
2-3. Chassis Removal and Refitting
2-1. Rear Cover Removal
2-2. Front Control Module Removal
=>
=>
=>
=>
=>
=>
=>
=>
=>
=>
=>
Remove the rear cover fixing screws indicated and pull the
rear cover carefully backwards.
rear cover carefully backwards.
Remove the two screws fixing the user control module to the
front underside of the set. The control module drops down to
allow access to the boards.
front underside of the set. The control module drops down to
allow access to the boards.
Screws
=>
- 15 -
2-6. D3 Board Removal
2-4. A Board Removal [ Step 1 ]
2-5. A Board Removal [ Step 2 ]
2-7. F3 Board Removal
Screw.
Release the 5 securing clips located around the side of the
chassis and slide the PWB clear of the bracket.
chassis and slide the PWB clear of the bracket.
Remove the 3 screws securing the PWB to the main bracket.
1 can be seen in the photo above and the other 2 are either
side of the FBT assembly.
1 can be seen in the photo above and the other 2 are either
side of the FBT assembly.
Clip.
Release the securing clip circled and slide the PWB clear of
the bracket.
the bracket.
Clip.
Release the 2 securing clips located along the side of the
chassis and slide the PWB clear of the bracket.
chassis and slide the PWB clear of the bracket.
Clip.
- 16 -
2-8. A1 Board Removal
2-9. Service Position
Position the chassis as indicated to access the solder side
of the PWB’s. To gain access to the A Board follow the
instructions on page 18. [Removal and Replacement of the
main bracket bottom plates ].
of the PWB’s. To gain access to the A Board follow the
instructions on page 18. [Removal and Replacement of the
main bracket bottom plates ].
Remove the shield case by pulling vertically until it is clear of the N Board. Release the N board socket retaining clips, circled, by
gently prising them with a screwdriver and carefully lift the N Board vertically.
gently prising them with a screwdriver and carefully lift the N Board vertically.
2-10. N Board Removal
Clips
Shield
case
case
Clip.
Release the 4 securing clips located around the side of the
chassis and slide the PWB clear of the bracket.
chassis and slide the PWB clear of the bracket.
Click on the first or last page to see other KD-28DX50U service manuals if exist.