DOWNLOAD Sony KV-XF21M80 Service Manual ↓ Size: 1.26 MB | Pages: 46 in PDF or view online for FREE

Model
KV-XF21M80
Pages
46
Size
1.26 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
kv-xf21m80.pdf
Date

Sony KV-XF21M80 Service Manual ▷ View online

– 5 –
KV-XF21M80
RM-952
2.
DISPLAY OF STANDBY/TIMER LIGHT FLASH COUNT
Diagnostic Item
Flash Count*
+B overcurrent/overvoltage
2 times
Vertical deflection stopped
White balance failure
5 times
* One flash count is not used for self-diagnostic.
3.
STOPPING THE STANDBY/TIMER FLASH
Turn off the power switch on the TV main unit or unplug the power cord from the outlet to stop the STANDBY/TIMER lamp
from flashing.
Lamp ON 0.3 sec.
Lamp OFF 3 sec.
Lamp OFF 0.3 sec.
2 times
5 times
STANDBY/SLEEP lamp
– 6 –
KV-XF21M80
RM-952
4.
SELF-DIAGNOSTIC SCREEN DISPLAY
For errors with symptoms such as “power sometimes shuts off” or “screen sometimes goes out” that cannot be confirmed, it
is possible to bring up past occurances of failure for confirmation on the screen:
[To Bring Up Screen Test]
In standby mode, press buttons on the remote commander sequentially in rapid succession as shown below:
[Screen display] /
channel 
[5] /
Sound volume
[-] /
Power ON
˘
Note that this differs from entering the service mode (mode volume 
[+]
).
Self-Diagnosis screen display
002 : 000
003 : 000
004 : 000
005 : 001
Numeral "0" means that no fault has been detected.
Numeral "I" means a fault has been detected.
101 : 000
SELF DIAGNOSTIC
5.
HANDLING OF SELF-DIAGNOSTIC SCREEN DISPLAY
Since the diagnostic results displayed on the screen are not automatically cleared, always check the self-diagnostic screen
during repairs. When you have completed the repairs, clear the result display to “0”.
Unless the result display is cleared to “0”, the self-diagnostic function will not be able to detect subsequent faults after
completion of the repairs.
[Clearing the result display]
To clear the result display to “0”, press buttons on the remote commander sequentially as shown below when the diagnostic
screen is being displayed.
Channel 
[8] /
0
[Quitting Self-diagnostic screen]
To quit the entire self-diagnostic screen, turn off the power switch on the remote commander or the main unit.
– 7 –
KV-XF21M80
RM-952
6.
SELF-DIAGNOSTIC CIRCUIT
[+B overcurrent ªOCPº]
Occurs when an overcurrent on the +B(135) line is detected by Q604. If Q604 go to ON
and the voltage to pin 18 of IC301 should go down when V.SYNC is more than seven
verticals in a period, the unit will automatically turn off.
[Horizontal deflection overdrive]
Occurs when an overdrive on H drive line is detected by D526. Power supply will be shut
down when detect it.
[Vertical deflection stopped]
Occurs when an absence of the vertical deflection pulse is detected by Q509 and IC001
shut down the power supply.
[Vertical deflection overcurrent]
Occurs when an overcurrent on V drive line is detected by Q507. Power supply will be
shut down when detect this by IC001.
[White balance failure]
If the RGB levels* do not balance or become low level within 5 seconds, this error will be
detected by IC301. TV will stay on, but there will be no picture.
* (Refers to the RGB levels of the AKB detection Ref pulse that detects IK.)
IC301
Y/CHROMA JUNGLE
FROM
CRT
FROM
[+B]
 Q604 C
[H]
 D526
[V]
 Q509/507
IC001
SYSTEM
IC003
MEMORY
B-DAT
IO-SDAT
IK-IN
MP/
PROTECT
IO-8DAT
O-LED
SDA
5
45
21
18
51
46
35
– 8 –
KV
-XF21M80
RM-952
SECTION  1
GENERAL
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 110 – 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.
Connecting an indoor antenna
Using Your New TV
IEC connector
(not supplied)
: Signal flow
Antenna cable (not supplied)
Antenna cable (not supplied)
Rear of TV
or
Note
• You are advise to use an outdoor antenna for better reception.
WOOFER (8
)
L(MONO)
L(MONO)
1
Rod antenna and cable
(supplied)
Rear of TV
1
2
3
Page of 46
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