Sony KV-DA29M81 Service Manual ▷ View online
– 5 –
KV-DA29M81
RM-W105
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".
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.
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.
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.
To quit the entire self-diagnostic screen, turn off the power switch on the remote commander or the main unit.
6. SELF-DIAGNOSTIC CIRCUIT
[+B overcurrent OCP ]
Occurs when an overcurrent on the +B(135) line is detected by Q6804.
[High voltage protector of Horizontal Deflection]
If Q6804 go to ON, the voltage to the pin57 of IC4301 go to "HIGH".
The unit will automatically turn off.
Occurs when an overvoltage of horizontal pulse is detected by D6809.
If the voltage of anode D6809, Q6814 and D6808 goes to High, the
voltage to pin57 of IC4301 go to "HIGH".
The unit will automatically turn off.
The unit will automatically turn off.
Occurs when an overvoltage of horizontal pulse is detected by D6809.
If the voltage of anode D6809, Q6814 and D6808 goes to High, the
voltage to pin57 of IC4301 go to "HIGH".
The unit will automatically turn off.
[+B overvoltage OVP ]
Occurs when an overvoltage on the +B(135) line is detected by D6635
and Q6611. If Q6611 go to ON, the voltage to pin6 of IC001 go to
"HIGH". The unit will automatically turn off.
and Q6611. If Q6611 go to ON, the voltage to pin6 of IC001 go to
"HIGH". The unit will automatically turn off.
[Vertical deflection failure]
Occurs when an absence of the vertical deflection pulse is detected by
Q6808 and R6910. Shut down the power supply.
Q6808 and R6910. Shut down the power supply.
[White balance failure]
If the RGB levels do not balance or become low level within 5 seconds.
This error will be detected by IC4301.
TV will stay on, but there will be no picture.
This error will be detected by IC4301.
TV will stay on, but there will be no picture.
[5V/9V failure]
Occurs when 5V/9V is not supplied to Mcon (IC001).
No raster will be detected or no picture.
No raster will be detected or no picture.
IC4301
RGB JUNGLE
CXA2170AQ
OVP
FROM
CRT (IK)
[V] Q6808, R6910
IC001
SYSTEM
SDA
SDA
9V
5V
IC004
MEMORY
IK_IN
H PROT
RED LED
5
24
57
7
6
V PROT
56
[OCP] Q6804, D6821
[H] D6808, D6809
84
14,47,
82
– 6 –
KV-DA29M81
RM-W105
1-6.
J BOARD REMOVAL
1-5.
TERMINAL BRACKET REMOVAL
SECTION 1
DISASSEMBLY
1-1.
REAR COVER REMOVAL
1-2.
SPEAKER REMOVAL
1-3.
CHASSIS ASSY REMOVAL
1-4.
SERVICE POSITION
2 Rear cover
1 Twelve screws
(BVTP 4
× 16)
1 Two screws
(Washer Head)
(+P4
(Washer Head)
(+P4
× 16)
5 One Screw
(+BVTP 3
(+BVTP 3
× 12)
6 Three Hooks
3 One screw
(+BVTP 4
(+BVTP 4
× 16)
4 Five screws
(+BVTP 3
(+BVTP 3
× 12)
2 Terminal Bracket
1 One screw
(+BVTP 3
(+BVTP 3
× 12)
2 J Board
1 Five Screws
(+BVTP 3
(+BVTP 3
× 12)
– 7 –
KV-DA29M81
RM-W105
Note: Access to the BC board is possible after
removal of the shiledcase. Remove the
shiledcase by removing 2 screws +BVTP 3x16
shiledcase by removing 2 screws +BVTP 3x16
1-7.
BC BOARD REMOVAL
1-8.
BH1 BOARD REMOVAL
1-9.
F1 BOARD REMOVAL
1-10. DL BOARD REMOVAL
2 Two Hooks
1
BC Board
2 Two Hooks
BH1 Board
1 F1 Board
2 Four Hooks
1 Three Hooks
2
DL Board
1-11. H1 AND H2 BOARDS REMOVAL
1-12. A AND D BOARD REMOVAL
3 Five Hooks
4
H1 Board
1
H2 Board
2 Four
Hooks
Hooks
2 Five screws
(BVTAP 3
(BVTAP 3
× 12)
1 One screw
(washer head)
(+P 3
(washer head)
(+P 3
× 12)
6 Five Hooks
4 A Board
5 D Board
3 Three
Hooks
Hooks
– 8 –
KV-DA29M81
RM-W105
• 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
1 Turn up one side of the rubber cap in the direction
indicated by the arrow
a.
2 Using a thumb pull up the rubber cap firmly in the direc-
tion indicated by the arrow
b.
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
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.
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.
the rubber.
1-13. PICTURE TUBE REMOVAL
Note:
• Please make sure the TV set is not in standing position before removing necessary CRT support located on
bottom right and left.
• When removing the Nut Locking: first make sure to hold the Nut special CRT with a spanner while opening the Nut
Locking using a torque driver. Then proceed to remove the Nut special CRT using a torque driver.
1) Place the TV set with the CRT face down on a cushion (jig).
2) Removal the Rear Cover.
3) Unplug all interconnecting leads from the Deflection Yoke, Neck Assy, Degaussing Coils and CRT grounding strap.
2) Removal the Rear Cover.
3) Unplug all interconnecting leads from the Deflection Yoke, Neck Assy, Degaussing Coils and CRT grounding strap.
!∞ Earth Coating Assy
5 Degaussing Coil
4 Anode Cap Removal
7 C Board Removal
8 VM Board Removal
9 Chassis Assy Removal
!£ Spring Tension(2)
Removal
Removal
!™
Support, CRT Removal (x2)
!¢ Holder, DGC
Removal (x2)
Removal (x2)
!§ Screw, Tapping 7 +
Crown Washer (4)
Crown Washer (4)
!º Loosen the Deflection Yoke
fixing screw and remove
!¶ Band, DGC Removal
6 Loosen the Neck Assembly
fixing screw and removal
fixing screw and removal
a
a
b
b
c
Anode Button
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