DOWNLOAD Sony KV-PF21M70 Service Manual ↓ Size: 2.8 MB | Pages: 82 in PDF or view online for FREE

Model
KV-PF21M70
Pages
82
Size
2.8 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
kv-pf21m70.pdf
Date

Sony KV-PF21M70 Service Manual ▷ View online

– 29 –
KV
-PF21M70/TF21M61/TF21M90/TF21P11
RM-952
24
Additional Information
Snowy picture
Noisy sound
Distorted picture
Noisy sound
Good picture
Noisy sound
No picture
No sound
Troubleshooting
If you find any problem while viewing your TV, please check the following guide. If
any problem persists, contact your Sony dealer .
Possible cause
Symptom
Solutions
• Check the antenna cable and connection
on the TV, VCR and on the wall. (page 4)
• Press SELECT until “MANUAL
PROGRAM” appears on the screen then
preset the channel again. (page 9)
• Check the antenna type (VHF/UHF).
Contact a Sony dealer for advice.
• Adjust the antenna direction. Contact a
Sony dealer for advice.
• Try using a booster.
• Turn off or disconnect the booster if it is
in use.
• If the sound of all the channels are
noisy, check the TV system (TV SYS)
setting (page 9), then press AUTO
PROGR to preset the channels again
(page 8).
• If the sound of some channels are noisy,
select the channel, then select the
appropriate TV system (TV SYS).
(page 9)
• Check the power cord, antenna and the
VCR connections.
• Press u (power).
• Press U (main power) on the TV to turn
off the TV for about five seconds, then
turn it on again.
• Connection is loose or the
cable is damaged.
• Channel presetting is
inappropriate or
incomplete.
• The antenna type is
inappropriate.
• The antenna direction is
inappropriate.
• Signal transmission is low.
• Broadcast signals are too
strong.
• The TV system setting or
channel presetting is
inappropriate or
incomplete.
• The power cord, antenna
or VCR is not connected.
• The TV is not turned on.
25
Additional Information
Possible cause
Symptom
Solutions
continued
Good picture
No sound
Dotted lines or stripes
Double images or
“ghosts”
N
o
 color
Abnormal color patches
TV cannot receive stereo
broadcast signal
• Press ¸ + to increase the volume level.
• Press ¤ to cancel the muting.
• Press A/B 
H until a better sound is
heard.
• Do not use a hair dryer or other
equipment near the TV.
• Adjust the antenna direction for
minimum interference. Contact a Sony
dealer for advice.
• Use a highly directional antenna.
• Use the fine tuning (FINE) function.
(page 10)
• Adjust the antenna direction. Contact a
Sony dealer for advice.
• Turn off or disconnect the booster if it is
in use.
• Press SELECT until “COLOR” appears
on the screen, then press + or – to adjust
the color level. (page 15)
• Press SELECT until “COL SYS ” appears
on the screen, then check the color
system setting (usually set this to
“AUTO”). (page 10).
• Adjust the antenna direction. Contact a
Sony dealer for advice.
• Keep external speakers or other
electrical equipment away from the TV.
Do not move the TV while the TV is
turned on. Press U  (main power) on
the TV to turn off the TV for about five
minutes, then turn it on again.
• Press A/B 
H until “AUTO” appears
on the screen.
• The volume level is too low.
• The sound is muted.
• Broadcast signal has a
transmission problem.
• There is local interference
from cars, neon signs, hair
dryers, power generators,
etc.
• Broadcast signals are
reflected by nearby
mountains or buildings.
• The antenna direction is
inappropriate.
• Use of a booster is
inappropriate.
• The color level setting is
too low.
• The color system setting is
inappropriate.
• The antenna direction is
inappropriate.
• The magnetic disturbance
from external speakers or
other equipment, or the
direction of the earth’s
magnetic field may affect
the TV.
• The stereo reception
setting is inappropriate.
– 30 –
KV
-PF21M70/TF21M61/TF21M90/TF21P11
RM-952
27
Additional Information
Identifying parts and controls
Refer to the pages indicated in parentheses ( ) for details.
Front panel
1
U
 (main power) button (5)
2 PROGR +/– (program) buttons (11)
3
¸
 +/– (volume) buttons (11)
4
 (TV/video) button (12)
5 AUTO PROGR (program) button (5)
6 SELECT button (9)
7
2
 (headphone) jack
continued
2
26
Additional Information
Stereo broadcast sound
switches on and off or is
distorted.
or
The sound switches
between monaural and
stereo frequently.
“100” appears on the top
of the screen and there is
no Teletext display.
(KV-TF21M61 only)
Teletext display is
incomplete
(snowy picture or double
images).
(KV-TF21M61 only)
Picture slant
Lines moving across the
TV screen.
The 
u
 indicator on your
TV flashes red a number
of times between
3-second intervals.
TV cabinet creaks.
A “boom” sound is heard
when the TV is turned on.
Troubleshooting (continued)
Possible cause
Symptom
Solutions
• Check the antenna cable and connection
on the TV, VCR and on the wall. (page 4)
• Adjust the antenna direction. Contact a
Sony dealer for advice.
• Press A/B 
 until a better sound is heard.
––
• Check the antenna cable and connection
on the TV, VCR, and at the wall. (page 4)
• Adjust the antenna direction. Contact a
Sony dealer for advice.
• Try using a booster.
• Use the fine tuning (FINE) function. (page 10)
• Press SELECT until “PIC ROTATION”
appears on the screen, then press + or –
to align the picture to the TV screen.
(page 12)
• Use the fine tuning (FINE) function.
(page 10)
• Contact your nearest Sony service
center. (page 21)
• Connection is loose or the
cable is damaged.
• The antenna direction is
inappropriate.
• Broadcast signal has a
transmission problem.
• The channel carries no
Teletext broadcast.
• Connection is loose or the
cable is damaged.
• The antenna direction is
inappropriate.
• Signal transmission is too
low.
• The terrestrial magnetism
affects your TV set.
• There is interference from
external sources, e.g.,
heavy machineries, nearby
broadcast station.
• Your TV may need service.
• Changes in room
temperature sometimes
make the TV cabinet
expand or contract,
making a noise. This does
not indicate a malfunction.
• The TV’s demagnetizing
function is working. This
does not indicate a
malfunction.
– 31 –
KV
-PF21M70/TF21M61/TF21M90/TF21P11
RM-952
28
Additional Information
Remote Control
9
!™
!∞
TV
1
2
3
4
6
7
8
9
÷
0
5
JUMP
SOUND 
MODE
 
FAVORITE
PROGR
SELECT 
p
PIC MODE 
p
Á
TV
1
2
3
4
6
7
8
9
÷
0
5
JUMP
SOUND 
MODE
 
FAVORITE
PROGR
SELECT 
p
PIC MODE 
p
Á
Button function
For general TV operations
For Teletext operations
1 u (power) button (11)
2 ; (TV) button (12)
3 Number buttons (11)
4 JUMP button (12)
5 PROGR +/– buttons (11)
6 SELECT button (9)
7 PIC MODE button (14)
8 + or – buttons (9)
9
(display) button (12)
!º ¤ (muting) button (12)
!¡ … (video) button (12)
!™ . +/– (volume) buttons (11)
!£ A/B button (17)
!¢ Timer setting buttons (13)
(wake up timer)
(sleep timer)
!∞ FAVORITE button
(not used for these models)
!§ SOUND MODE button (14)
!¶ Teletext operation buttons (19,20)
(KV-TF21M61 only)
 (text)
 (enlarge)
 (reveal)
 (hold)
 (index)
 (text clear)
p
 (FASTEXT: red, green, yellow, blue)
Names/symbols of buttons on the
remote are indicated in different
colors to represent the available
functions.
Label color
White
Green
1
2
3
4
5
6
7
8
Identifying parts and controls (continued)
– 32 –
KV
-PF21M70/TF21M61/TF21M90/TF21P11
RM-952
SECTION  1-3
GENERAL-
(KV-TF21P11)
The operating instructions mentioned here are partial abstracts 
from the Operating Instruction Manual.  The page numbers of 
the Operating Instruction Manual remain as in the manual.
2
WARNING
•  Dangerously high voltages are present inside the TV.
•  Operate the TV only between 220 – 240 V AC.
To prevent fire or shock hazard, do not expose
the TV to rain or moisture.
Do not operate the TV if any liquid or solid object
falls into it. Have it checked immediately by
qualified personnel only.
Do not open the cabinet and the rear cover of the
TV. Refer servicing to qualified personnel.
Do not install the TV in hot, humid or excessively
dusty places.
Do not install the TV in a confined space, such
as a bookcase or built-in cabinet.
Do not block the ventilation openings of the TV.
Do not pull the power cord to disconnect the TV.
Pull it out by the plug.
Disconnect the power cord during lightning
storms or if you are not going to use the TV for
several days.
Install the TV in a stable position. Do not allow
children to climb onto it.
Do not plug in too many appliances to the same
power socket. Do not damage the power cord.
Clean the TV with a dry and soft cloth.
Do not use benzine, thinner, or any other chemicals
to clean the TV. Do not scratch the picture tube.
4
Using Your New TV
Getting Started
 Step 1
Connect the antenna
If you wish to connect a VCR, see the “Connecting a VCR” diagram below.
Using Your New TV
IEC connector
(not supplied)
To video and
audio outputs
VCR
 (yellow)
 (black)
Antenna cable (not supplied)
To  1
(video input)
Audio/Video cable
(not supplied)
: Signal flow
Antenna cable
(not supplied)
Rear of TV
Rear of TV
Connecting a VCR
To watch the video, press … 
 (see page 12).
or
: Signal flow
To antenna
output
VIDEO
VIDEO IN
VIDEO OUT
AUDIO
1
To ˘
(antenna)
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