Sony KV-SW342M81 Service Manual ▷ View online
– 4 –
KV-SW342M81
RM-GA002
[+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.
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).
(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.
detected by IC001 (A board). TV will stay on, but there will be 5 times LED blinking.
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.
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.)
A BOARD
IC001
Y/CHROMA JUNGLE
A BOARD
IC804
V.OUT
A BOARD
IC001
SYSTEM
A BOARD
IC003
MEMORY
FROM
C BOARD
IC751 PIN 5
IK
EHTO
RED LED
DISPLAY
SDA1
V.GUARD
SDA
5
F.B-PLS
3
13
84
32
122
A BOARD
FROM
Q816
COLLECTOR
99
POWER SUPPLY NG (+5V)
for VIDEO PROCESSOR
for VIDEO PROCESSOR
4. SELF DIAGNOSTIC SCREEN DISPLAY
5. HANDLING SELF DIAGNOSTIC SCREEN DISPLAY
6. SELF-DIAGNOSTIC CIRCUIT
2 :
000
3 :
000
4 :
000
5 :
001
8 :
002
101 :
N/A
"0" means no fault has been detected.
"1" means a fault has been detected.
"2" means two faults has been detected.
"2" means two faults has been detected.
"N/A" means not available for this models.
SELF DIAGNOSTIC
5
8
No.
Description
Method
1.
Display self diagnostic screen
[Display] t [Channel ] t [Volume ] t [Power / TV]
Note: The above must be performed while TV is on standby mode.
2.
Stop standby flash
i) Turn off power switch on main.
ii) Unplug power cord from the outlet.
ii) Unplug power cord from the outlet.
3.
Clear fault result
In Self Diagnostic Screen, press
[Channel ] t
-
Note: Diagnostic results display on screen is not automatically cleared. Therefore,
clear result after completion of repair.
clear result after completion of repair.
4.
Quit self diagnostic screen
Turn off power switch of remote commander or main unit.
– 5 –
KV-SW342M81
RM-GA002
SECTION 1
DISASSEMBLY
1-2.
SPEAKER REMOVAL
1-3.
CHASSIS ASSY REMOVAL
1-4.
SERVICE POSITION
1-5.
TERMINAL BRACKET AND J3 BOARD REMOVAL
1-1.
REAR COVER REMOVAL
1-6.
F1 BOARD REMOVAL
1 Thirteen screws
(+BVTP
(+BVTP
4
× 16
Type2
IT-3)
2 Rear cover
1 Two screws
(Washer Head)
(+P4
(+P4
× 16)
4 One screw
(+BVTP
(+BVTP
3
× 12
Type2
IT-3)
5 Two hooks
3 One screw
(+BVTP
(+BVTP
3
× 12
Type2
IT-3)
7 J3 board
6 Terminal bracket
1 One screw
(+BVTP
(+BVTP
4
× 12
Type2
IT-3)
2 Two screws
(+BVTP
(+BVTP
3
× 12
Type2
IT-3)
2 One hooks
1 Five screws
Screw (3 x12),(+)BVTAP
3 F1 Board
– 6 –
KV-SW342M81
RM-GA002
1-9.
D3 AND F2 BOARDS REMOVAL
1-7.
H4 AND H7 BOARDS REMOVAL
1-8.
A BOARD REMOVAL
1 Five Hooks
3 Three Hooks
4 H4 Board
2
H7 Board
1 Five screws
Screw (3
Screw (3
× 12), (+)BVTAP
2 One screw (Washer head)
(+P
(+P
3
× 12)
3 Four Hooks
4 A Board
2 D3 Board
3 F2 Board
1 Three Hooks
– 7 –
KV-SW342M81
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
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 direction
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 c.
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.
rubber.
anode button
1-10. 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.
and left.
1) Remove the rear cover.
2) Unplug all interconnecting leads from the Deflection yoke, Neck assy, Degaussing Coil and CRT grounding strap. Remove
2) Unplug all interconnecting leads from the Deflection yoke, Neck assy, Degaussing Coil and CRT grounding strap. Remove
Chassis Assy.
3) Place the TV set with the CRT face down on a cushion jig
a
a
b
b
c
qa
Earth Coating Assy
4 Anode Cap Removal
7 Band, DGC Removal
5 C Board Removal
8Holder, DGC(2) Removal
q;
Spring Tension(2) Removal
qf
Nut, Special, CRT (x4)
9
Degaussing Coil
6 Loosen the Neck Assembly fixing screw
and remove Neck Assy & VM board
and remove Neck Assy & VM board
qs
Loosen the Deflection Yoke
fixing screw and remove
qd
Supports, CRT
Removal
(x2)