6. ELECTRICAL PARTS LIST......................................... 56
OPERATING INSTRUCTIONS
CAUTION
SHORT CIRCUIT THE ANODE OF THE PICTURE TUBE AND THE
ANODE CAP TO THE METAL CHASSIS, CRT SHIELD, OR
CARBON PAINTED ON THE CRT, AFTER REMOVING THE
ANODE.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY SHADING AND MARK ! ON THE
SCHEMATIC DIAGRAMS, EXPLODED VIEWS AND IN THE
PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE
THESE COMPONENTS WITH SONY PARTS WHOSE PART
NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN
SUPPLEMENTS PUBLISHED BY SONY.
– 2 –
KV-SW21M20/M80/M95
SELF DIAGNOSTIC FUNCTION
The units in this manual contain a self diagnostic function. If an error occurs, the STANDBY (1) indicator will automatically
begin to flash. The number of times the STANDBY (1) indicator flashes translates to a probable source of the problem. If an
error symptom cannot be reproduced, the remote commander can be used to review the failure occurrence data stored in
memory to reveal past problems and how often these problems occur.
1. DIAGNOSTIC TEST INDICATORS
When an errors occurs, the STANDBY (1) indicator will flash a set number of times to indicate the possible cause of the
problem. If there is more than one error, the indicator will identify the first of the problem areas.
Result for all of the following diagnosis items are displayed on screen. No error has occurred if the screen displays a "0".
RM-GA002
Diagnosis
Item
Description
No Power
+B overcurrent
(OCP)
V-Protect (OVP)
IK (AKB)
Power supply
NG (+5V) for
Video Processor
No. of timer
STANDBY (1)
indicator flashes
Does not light
2 times
4 times
5 times
8 times
Diagnostic Result
on screen display
–
2:0
or
2:1 ~ 255
4:000
or
4:1 ~ 255
5:0
or
5:1 ~ 255
8:0
or
8:1 ~ 255
Probable Cause
Location
• Power cord is not plugged
in.
• Fuse is burned out (F600)
A board.
• H OUT (Q805) is shorted.
(A board)
IC751 is shorted. (C board)
•
• +13V is not supplied.
(A board)
• IC804 is faulty. (A board)
• Video OUT (IC1545) is
faulty. (A board)
• IC001 is faulty. (A board)
• Screen (G2) is improperly
adjusted.
• IC604 faulty.
• IC602 faulty.
Detected
Symptoms
• Power does not turn on.
• No power is supplied on
TV.
• AC Power supply is faulty.
• Power does not turn on.
• Load on power line is
shorted.
• Has entered standby state
after horizontal raster.
• Vertical deflection pulse is
stopped.
• Power line is shorted or
power supply is shorted.
• No raster is generated.
• CRT Cathode current
detection reference pulse
output is small.
• No power supply to CRT
ANODE.
• No RASTER is generated.
2. STANDBY INDICATOR BLINKING PROCESS
Lamp ON 300ms
Lamp OFF 300ms
The example above represents for 4 times blink
Lamp OFF 3 seconds
3. STANDBY INDICATOR ON TV FRONT PANEL
Standby indicator
– 3 –
KV-SW21M20/M80/M95
RM-GA002
4. SELF DIAGNOSTIC SCREEN DISPLAY
SELF DIAGNOSTIC
2 : 000
3 :000
4 :000
5 :001
8 :002
101 :N/A
5. HANDLING SELF DIAGNOSTIC SCREEN DISPLAY
No.DescriptionMethod
1.Display self diagnostic screen[Display] t [Channel ] t [Volume ] t [Power / TV]
2.Stop standby flashi) Turn off power switch on main.
3.Clear fault result[Channel ] t -
4.Quit self diagnostic screenTurn off power switch of remote commander or main unit.
"0" means no fault has been detected.
"1" means a fault has been detected.
"2" means two faults have been detected.
"N/A" means not available for this models.
5
Note: The above must be performed while TV is on standby mode.
ii) Unplug power cord from the outlet.
8
Note: Diagnostic results display on screen is not automatically cleared. Therefore,
clear result after completion of repair.
6. SELF-DIAGNOSTIC CIRCUIT
FROM
C BOARD
IC751 PIN 5
A BOARD
FROM
Q816
COLLECTOR
A BOARD
IC001
Y/CHROMA JUNGLE
IK
32
EHTO
A BOARD
IC804
V.OUT
F.B-PLS
A BOARD
IC001
SYSTEM
SDA1
31384
V.GUARD
RED LED
99
122
DISPLAY
A BOARD
IC003
MEMORY
5
SDA
[+B overcurrent $OCP%]Occurs when an overcurrent on the +B(135V) line is detected by pin 32 of IC001 (A board).
If the voltage of pin 32 of IC001 (A board) is more than 4V, the unit will automatically go to
standby.
[V-PROTECT]Occurs when an absence of the vertical deflection pulse is detected by pin 13 of IC001
(A board).
[IK $AKB%]If the RGB levels* do not balance within 15 sec after the power is turned on, this error will be
detected by IC001 (A board). TV will stay on, but there will be 5 times LED blinking.
POWER SUPPLY NG (+5V)
for VIDEO PROCESSOR
Occurs when IC001 internal HV protect detects an abnormal H-Pulse (frequency) due to
improper power supply to IC001. TV cuts off high voltage power of anode CRT. No picture will be
detected. eg: IC602, IC604 go faulty.
* (Refers to the RGB levels of the AKB detection Ref pulse that detects IK.)
– 4 –
SECTION 1
DISASSEMBLY
KV-SW21M20/M80/M95
RM-GA002
1-13D BOX REMOVAL (KV-SW21M95)
1
3D Speaker box assy
2
1-3. SPEAKER REMOVAL
1
Two screws
(Washer Head)
(+P4 x16)
Rear cover
1-2REAR COVER REMOVAL
1-4. CHASSIS ASSY REMOVAL
2Rear cover
Eight screws
1
(+BVTP 4
× 16)
1-5. SERVICE POSITION
– 5 –
1-6. TERMINAL BRACKET AND
J BOARD REMOVAL
1
One screw
(+
BVTP 3
5
(
One screw
2
+BVTP
3
Terminal bracket
(
× 12)
J Board
KV-SW21M95
Two screws
4
+BVTP
(
16
×
4
)
)
12
×
3
)
KV-SW21M20/M80/M95
RM-GA002
1-7. A BOARD REMOVAL
A Board
1-8. PICTURE TUBE REMOVAL
Note:
• The picture tube is upside down for (KV-SW21M20(South Africa)) only and the position for the anode cap and tension
springs are changed accordingly.
• Please make sure the TV set is not in standing position before removing necessary CRT support located on bottom right
and left.
1) Remove the Rear Cover.
2) Unplug all interconnecting leads from the Deflection Yoke, Neck Assy, Degaussing Coils and CRT grounding strap.
Remove Chassis Assy.
3) Place the TV set with the CRT face down on a cushion (jig).
4
Anode Cap Removal
7
Degaussing Coil
6
Loosen the Neck Assembly
fixing screw and remove
Neck Assy & VM board
5
C Board Removal
0
Earth Coating Assy
8
Holder, DGC
Removal (x2)
qd
Screw, Tapping 5 + Crown Washer (x4)
9
Spring Tension
Removal (x2)
qs
Supports, CRT
Removal (x2)
qa
Loosen the Deflection Yoke
fixing screw and remove
– 6 –
KV-SW21M20/M80/M95
RM-GA002
• REMOVAL OF ANODE-CAP
Note:
• After removing the anode, short circuit the anode of the picture tube and the anode cap to the metal chassis, CRT shield or
carbon paint on the CRT.
•REMOVING PROCEDURES
A
A
1 Turn up one side of the rubber cap in the direction
indicated by the arrow a.
B
B
2 Using a thumb pull up the rubber cap firmly in the direction
indicated by the arrow b.
C
Anode Button
3 When one side of the rubber cap is separated from the
anode button, the anode-cap can be removed by turning
up the rubber cap and pulling it up in the direction of the
arrow c.
•HOW TO HANDLE AN ANODE-CAP
1 Do not damage the surface of anode-caps with sharp
shaped objects.
2 Do not press the rubber too hard so as not to damage
the inside of anode-cap.
A metal fitting called the shatter-hook terminal is built
into the rubber.
3 Do not turn the foot of rubber over too hard.
The shatter-hook terminal will stick out or damage the
rubber.
– 7 –
KV-SW21M20/M80/M95
RM-GA002
SECTION 2
SET-UP ADJUSTMENTS
The following adjustments should be made when a complete
realignment is required or a new picture tube is installed.
Perform the adjustments in order as follows:
1. Beam Landing
2. Convergence
The controls and switch should be set as follows unless
otherwise noted:
3. Focus
4. G2 (SCREEN)
5. White Balance
Picture control ......................................................... NORMAL
Brightness control ................................................... NORMAL
U S : US/Latin/Taiwan
E U : Europe
G A : General Area
J P: Japan
item no.service dataNVMfieldchannel no./
softwareservice datareservedpower on time
Status ByteStatus Byte
Flash DCXO#1 SSD#2 SSD
VDSP_C Flag
CO_LOCKED
VDSP
Detected Stereo Type (Direct Value from CZ_ Stereo_Mode)
111Needed for Nicam DCXO aligment Purpose
xyValue of x = 0 - Unknown, 1 - BTSC, 2 - A2, 3 - NICAM,
4 - KOREAN, 5 - Japan, 6 - AV Stereo
Value of y = 0 - Mono, 1 - Stereo, 2 - Bilingual, 4 - SAP/Single
0 1 : serial no. of the M/P release
for each destination
b. METHOD OF CANCELLATION FROM SERVICE MODE
Set the standby condition (Press [POWER] button on the commander), then press [POWER] button again, hereupon it becomes
TV mode.
c. METHOD OF WRITE INTO MEMORY
1. Set to Service Mode.
2. Press 1 (UP) and 4 (DOWN), to select the adjustment item.
3. Change item by pressing 3, 6.
4. Press [MUTING] button to indicate WRITE on the screen.
5. Press - button to write into memory.
1, 4Select the adjustment item.
r
3, 6Raise/lower the data value.
r
[MUTING]Writes.
r
-Executes the writing.
d. MEMORY WRITE CONFIRMATION METHOD
1. After adjustment, pull out the plug from AC outlet, and then plug into AC outlet again.
2. Turn the power switch ON and set to Service Mode.
3. Call the adjusted items again to confirm adjustments were made.
– 11 –
KV-SW21M20/M80/M95
RM-GA002
e. OTHER FUNCTION VIA REMOTE COMMANDER
7, -All the data becomes the values in memory.
8, -All user control goes to the standard state.
Display, -Service data initialization (Be sure not to use usually.)
2, 5Select Device or Category
3-2. ADJUSTMENT METHOD
Item Number 000 HPOS
This explanation uses H POSITION as an example.
1. Select "000 HPOS" with the 1 and 4 buttons, or 2 and 5.
2. Raise/lower the data with the 3 and 6 buttons.
3. Select the optimum state. (The standard is IF for PAL reception.)
4. Write with the [MUTING] button. (The display changes to WRITE.)
5. Execute the writing with the - button. (The WRITE display will be changed to red color while excuting, and back to
SERVICE.)
Example on screen display :-
GREEN
GEOM000HPOS 039 SERVICE 50 VIDEO 1
Adjusted with 3 and 6 buttons.
GREEN
GEOM000HPOS 039 WRITE 50 VIDEO 1
write with [MUTING].
RED
GEOM000HPOS 039 WRITE 50 VIDEO 1
Write executed with -.
The WRITE display
then returns to green
SERVICE
Use the same method for all Items. Use 1 and 4 to select the adjustment item, use 3 and 6 to adjust, write with
[MUTING], then execute the write with -.
Note : 1. In [WRITE], the data for all items are written into memory together.
2. For adjustment items that have different standard data between 50Hz or 60Hz, be sure to use the respective input
signal after adjustment.
a) In the initial value (detailed) column, the data after the slash mark ("/") refers to NTSC model data.
No ("/") means data is common for Multi and NTSC model.
b) Item remarked "*" and "**", please refer page 25 for the data.
c)
shaded items are no data.
d) Standard data listed on the Adjustment Item Table are reference values, therefore it may be different for each model and for each mode.
e) Note for the Different Data those are the standard data values written on the microprocessor. Therefore, the data values of the models are stored respectively in the memory.
In the case of a device replacement, adjustment by rewriting the data value is necessary for some items.