DOWNLOAD Sony CPD-120AS Service Manual ↓ Size: 4.11 MB | Pages: 42 in PDF or view online for FREE

Model
CPD-120AS
Pages
42
Size
4.11 MB
Type
PDF
Document
Service Manual
Brand
Device
Monitor
File
cpd-120as.pdf
Date

Sony CPD-120AS Service Manual ▷ View online

– 9 –
22
GB
Adjusting the pincushion
The adjustment data becomes the individual setting for each input signal
received.
1.
Press the d button.
The GEOMETRY OSD appears.
2.
Press the > 
+/– 
buttons.
+ to expand the picture sides
– to diminish the picture sides
To exit the OSD
Press the d button again.
✎ 
Tip
If you don’t touch any buttons, the OSD automatically disappears after 10 seconds.
When you want to adjust another item, press the button of the item.  The OSD of the selected item
appears.
Adjustments
23
GB
Setting the color temperature
The selected color temperature becomes the common setting for all input
signals.
1.
Press the 
 button.
The COLOR TEMPERATURE OSD appears.
2.
Adjust with the . 
+/–
  and > 
+/–
 buttons.
To select 5000K or 9300K
Press > 
+/–
 buttons.
The selected color temperature is indicated.
+ to select 9300K
– to select 5000K
To obtain the desired color temperature between 5000K and
9300K
Press . 
+/–
  buttons.
+ for higher temperature
– for lower temperature
✎ 
Tip
The first press of . + or – button recalls the color temperature which was obtained at the last
adjustment.
To exit the OSD
Press the 
 button again.
✎ 
Tip
If you don’t touch any buttons, the OSD automatically disappears after 10 seconds.
When you want to adjust another item, press the button of the item.  The OSD of the selected item
appears.
Adjustments
24
GB
Adjustments
Resetting
p
To recall the factory settings for individual adjustment
item
Press the button of the adjustment item you want to recall the factory settings,
and then press the ? button immediately before the OSD disappears.
p
To recall the factory settings for the current mode
Press the ? button immediately when no OSD is shown.
p
To recall the factory settings for all modes
Press and hold the ? button for 2 seconds.
All adjustments return to the factory settings.
25
GB
Available Features
Available Features
Selecting Graphic Picture Enhancement
(GPE)
There are 4 GPE modes from “0” through “3,” and the picture is more vivid at a
higher number. You can enjoy movies and games with striking visuals by
enhancing the picture sharpness.
Default setting is “0.”
1.
Press the 
 button.
The BRIGHTNESS/GPE OSD appears.
2.
Press the > 
+/–
 buttons to select the GPE mode.
+ for higher number
– for lower number
You can adjust the brightness on the same OSD by pressing the
 . 
+/–
 buttons.
To exit the OSD
Press the 
 button again.
✎ 
Tip
If you don’t touch any buttons, the OSD automatically disappears after 10 seconds.
When you want to adjust another item, press the button of the item.  The OSD of the selected item
appears.
Notes on GPE mode
For text oriented applications such as word processing and spreadsheets, set the GPE
mode to “0” (default setting).
GPE (Graphic Picture Enhancement) mode is reset to “0” when:
• you turn off the display
• the PC recovered from the power saving mode
• the resolution is changed
– 10 –
26
GB
Available Features
Selecting Bass Boost
There are 3 Bass Boost modes from “0” through “2,” and bass is boosted more
at a higher number. The factory setting is “1” (normal mode).
You can enjoy games and music programs with lively sound by selecting  “2.”
When you use the PC phone, select “0.” You will be able to hear the caller’s
voice more easily as the high-pitched tone is reduced.
1.
Press the ≥ button.
The VOLUME/BASS BOOST OSD appears.
2.
Press the > 
+/–
 buttons to select the BASS BOOST mode.
+ for higher number
– for lower number
After selecting the Bass Boost mode, you can adjust the volume on the same
OSD.
Press the  . 
+/–
 buttons.
+ to increase volume
– to decrease volume
To exit the OSD
Press the ≥ button again.
✎ 
Tip
If you don’t touch any buttons, the OSD automatically disappears after 10 seconds.
When you want to adjust another item, press the button of the item.  The OSD of the selected item
appears.
30
GB
Troubleshooting
This section may help you isolate a problem and as a result, eliminate the need
to contact technical support, allowing continued productivity.
No picture
If the u indicator is not lit
m Check that the power cord is properly connected.
m Check that the u switch is in the “ON” position.
If the u  indicator is lit in orange, or alternately in orange and green
m Check that your computer power switch is in the “ON” position.
m The display may recover when you press any key on the keyboard of the
computer.
m Check that the video cable is properly connected.
m Ensure that no pins are bent or pushed in the HD15 connector of the cable.
m Check that the video card in your computer is seated completely in a proper
bus slot.
m Check that the video sync signal is within that specified for the display.
m This display has a self-diagnostics function.  To activate the function, turn off
the computer and the display.  Press and hold the u switch of the display for
about 8 seconds. If the display is operating correctly, the screen will become
white first and then the color bars will appear.
If the u indicator is flashing in orange
m Check that the video sync signal is specified for the display.
m There is a potential display failure. Contact Sony Technical Support.
No sound from speaker
If the ¤ indicator is lit
m Press the ¤ button to cancel muting.
m Check that the audio plug is properly connected.
m Adjust the volume with . +/– buttons.
m Check that the headphones are not connected.
m Check that the sound board of the computer is properly connected.
m Check that the volume control, muting, sound selector, etc. of the sound
board.  (See the computer’s manual.)
Microphone mixing is not possible
m Check that the MIC plug is properly connected.
m Check that the sound board of the computer is properly connected.
m Check that the microphone control, sound selector, etc. of the sound board.
(See the computer’s manual.)
Troubleshooting
31
GB
Howling (feed-back) is heard
m Decrease the volume with . +/– buttons, or turn down the microphone
input volume of the sound board.
Picture is scrambled
m Check your graphics board manual for the proper display setting on the
display.
m Check this manual and confirm that the graphic mode and the frequency at
which you are trying to operate is supported. Even within the proper range,
some video boards may have a sync pulse that is too narrow for the display to
sync correctly.
Color is not uniform
m Trip the u switch once to activate the Auto-degauss cycle*.
Picture is flickering
m If the refresh rate is not appropriate, the picture may flicker. Set the refresh
rate of the non-interlace mode as high as possible on the computer. For
details on how to set the refresh rate, consult the dealer of your computer or
video board.
Screen image is not centered or sized properly
m Adjust picture centering, size, or geometry (rotation/ pincushion) on the OSD
(pages 19–22).
m Some video modes do not fill the screen to the edge of the display. There is
no single answer to solve the problem. There is a tendency for this problem
to occur on higher refresh timings.
Picture is fuzzy
m Adjust the contrast and brightness on the OSD (pages 17, 18). Some brands
of SVGA boards have an excessive video output level which creates a fuzzy
picture at maximum contrast.
m The GPE setting may not be proper for the picture. Selecting a lower GPE
number may improve the picture (page 25).
m Trip the u switch once to activate the Auto-degauss cycle*.
Picture bounces or has wavy oscillations
m Isolate and eliminate any potential sources of electric or magnetic fields.
Common causes for this symptom are electric fans, fluorescent lighting, laser
printers, etc.
m If you have another display close to this display, increase the distance
between them to reduce interference.
m Try plugging the display into a different AC outlet, preferably on a different
circuit.
Picture appears to be ghosting
m Eliminate the use of video extension cables and/or video switch boxes if this
symptom occurs. Excessive cable length or weak connections can produce
this symptom.
Continued to the next page 
Troubleshooting
32
GB
Fine horizontal lines (wires) are visible
m These wires stabilize the vertically striped Aperture Grille. The Aperture
Grille allows more light to pass through to the screen giving the Trinitron
CRT more color and brightness.
Wavy or elliptical (moire) pattern is visible
m Due to the relationship between resolution, display Aperture Grille pitch and
the pitch of some image patterns, certain screen backgrounds, especially gray,
sometimes show moire which looks like wavy lines.  This can only be
eliminated by changing your desktop pattern.
Hum is heard right after the power is turned on
m When the power is turned on, the Auto-degauss cycle* is activated. While the
Auto-degauss cycle is activated, a hum may be heard for about 3 seconds.
This is not a malfunction.
* The Auto-degauss function demagnetizes the metal frame of the CRT to obtain a
neutral field for uniform color reproduction. If a second degauss cycle is needed, allow
a minimum interval of 20 minutes for the best result.
• If the problem persists, call your authorized Sony dealer from a location near
you, or call Sony Technical Support.
• Note the model name and the serial number of your display. Also note the
make and name of your computer and video board.
Troubleshooting
CPD-120AS
– 11 –
SECTION  2
DISASSEMBLY
2-1. CABINET  REMOVAL
2-2. SERVICE POSITION
(1) D  BOARD
(2) U  BOARD
U board
D board
2
A block
1
3
1
     Cabinet
2
     Four screws
     (+BVTP 4 x 16)
1
CPD-120AS
– 12 –
2-3. D  BOARD  REMOVAL
2-4. U  BOARD  REMOVAL
     Stand base (Rear)
2
     U board
1
     Two screws
     (+BVTP 4 x 16)
4
3
     Two screws
(+BVTP 3 x 12)
     A block
2
     Anode cap
1
     Screw
     (+BVTT 4 x 8)
3
     Cable stopper
4
     Two screws 
     (+BVTP 3 x 12)
7
     Two screws 
     (+BVTP 3 x 12)
5
     Cable blacket
6
     D board
9
     Two screws
     (+BVTP 3 x 12)
8
Earth
Earth
Earth
CN601
CN503
CN311
CN501
CN607
CN507
Page of 42
Display

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