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

– 41 –
KV
-PF21M70/TF21M61/TF21M90/TF21P11
RM-952
21
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
• Press ¸ + to increase the volume level.
• Press ¤ to cancel the muting.
• 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.
• The volume level is too low.
• The sound is muted.
• 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
inapproriate.
• The magnetic disturbance
from external speakers or
other equipment, or the
direction of the earth’s
magnetic field may affect
the TV.
22
Additional Information
“100” appears on the top
of the screen and there is
no Teletext display.
Teletext display is
incomplete
(snowy picture or double
images).
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 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 19)
• 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.
– 42 –
KV
-PF21M70/TF21M61/TF21M90/TF21P11
RM-952
23
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    (earphone) jack
continued
2
Ø
24
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
(not used for this model)
!¢ Timer setting buttons (13)
(wake up timer)
(sleep timer)
!∞ FAVORITE button
(not used for this model)
!§ SOUND MODE button (14)
!¶ Teletext operation buttons (19, 20)
 (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)
– 43 –
KV
-PF21M70/TF21M61/TF21M90/TF21P11
RM-952
SECTION 2
DISASSEMBLY
2-2. CHASSIS ASSY REMOVAL
1
 Chassis assy
Lever
Lever
2-1. REAR COVER REMOVAL
Six screws
(BVTP 4
×
16)
Rear cover
1
2 Two screws
(BVTP 4
×
16)
2-3. F BRACKET REMOVAL (KV-TF21M61/TF21M90)
1
 Three connectors
2
 F board
Lever
1
 Three connectors
2
 F board
Lever
(KV-PF21M70/TF21P11)
– 44 –
KV
-PF21M70/TF21M61/TF21M90/TF21P11
RM-952
2-6. TERMINAL BRACKET REMOVAL
A board
Terminal board bracket
2-5. REPLACEMENT OF PARTS
For replacement of the Multi Button and Bar Optical ,unscrew to exchange with the
new parts, and fix them with screws (+BVTP) respectively.
2-5-1. REPLACEMENT OF MULTI BUTTON
Multi button
Two screws
(BVTP 3
×
12)
2-5-2.
REPLACEMENT OF BAR OPTICAL
Bar Optical
One screw
(BVTP 3
×
12)
A board
Terminal board bracket
(KV-PF21M70/TF21P11)
(KV-TF21M61/TF21M90)
2-4. SERVICE POSITION
(Note: Remove F Bracket first.)
Page of 82
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