Sony KV-HV212M50 Service Manual ▷ View online
– 4 –
KV-HV212M50/M53
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
EHT0
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 have been detected.
"2" means two faults have 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
[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-HV212M50/M53
RM-GA002
2
Rear cover
1
Eight screws
(+BVTP 4
(+BVTP 4
×
16)
2
Rear cover
1
3D Speaker box assy
(KV-HV212M53)
1
Two screws
(WH DIA. 16)
(+P 4
(WH DIA. 16)
(+P 4
×
16)
SECTION 1
DISASSEMBLY
2
Terminal
bracket
3
One screw
(+BVTP 4 x 16)
1
One screw
(+BVTP 3 x 12)
1-2.
REAR COVER REMOVAL
1-1. 3D SPEAKER REMOVAL
1-4.
CHASSIS ASSY REMOVAL
1-3.
SPEAKER REMOVAL
1-6.
TERMINAL BRACKET REMOVAL
1-5.
SERVICE POSITION
– 6 –
KV-HV212M50/M53
RM-GA002
1
J Board (KV-HV212M53)
A Board
1-8.
A BOARD REMOVAL
1-7.
J BOARD REMOVAL
1-9.
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.
1) Place the TV set with the CRT face down on a cushion jig.
2) Remove the rear cover.
3) Unplug all under connecting leads from the Deflection Yoke, Degaussing Coil and CRT grounding strap.
2) Remove the rear cover.
3) Unplug all under connecting leads from the Deflection Yoke, Degaussing Coil and CRT grounding strap.
qs
Degaussing Coil
4
Anode Cap Removal
5
C Board Removal
8
Chassis Assy Removal
9
Support, CRT(2) Removal
6
Loosen the Neck Assembly
fixing screw and remove
fixing screw and remove
q;
Holder, DGC(2)
Removal (not used)
Removal (not used)
qf
DGC Removal
qa
Spring Extension (2)
Removal
Removal
qg
Screw, Tapping
5+ Crown Washer
qd
Earth Coating Assy
7
Loosen the Deflection Yoke
fixing screw and remove
fixing screw and remove
– 7 –
KV-HV212M50/M53
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
indicated by the arrow
A
.
2
Using a thumb pull up the rubber cap firmly in the di-
rection indicated by the arrow
rection 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
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
direction of the arrow
C
.
•
HOW TO HANDLE AN ANODE-CAP
1
Do not damage the surface of anode-caps with
sharp shaped objects.
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.
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.
The shatter-hook terminal will stick out or damage
the rubber.
anode button
a
a
b
b
c
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