DOWNLOAD Sony KV-SZ292M50 Service Manual ↓ Size: 10.54 MB | Pages: 72 in PDF or view online for FREE

Model
KV-SZ292M50
Pages
72
Size
10.54 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
kv-sz292m50.pdf
Date

Sony KV-SZ292M50 Service Manual ▷ View online

– 4 –
KV-SZ292M50/M61/M81/N50/N60
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.
[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.
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.)
A BOARD
IC001
Y/CHROMA JUNGLE
A BOARD
IC804
V.OUT
A BOARD
IC001
SYSTEM
A BOARD
IC003
MEMORY
FROM
CV 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
4. SELF DIAGNOSTIC SCREEN DISPLAY
5. HANDLING SELF DIAGNOSTIC SCREEN DISPLAY
6. SELF-DIAGNOSTIC CIRCUIT
2 : 
000
3 :
N/A
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.
"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.
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.
4.
Quit self diagnostic screen
Turn off power switch of remote commander or main unit.
– 5 –
KV-SZ292M50/M61/M81/N50/N60
RM-GA002
SECTION 1
DISASSEMBLY
1-2.
SPEAKER REMOVAL
1-3.
CHASSIS ASSY REMOVAL
1-4.
SERVICE POSITION
1-5.
A BOARD AND H2 BOARD  REMOVAL
1-1.
REAR COVER REMOVAL
1 Eleven screws
     (+BVTP 4 
× 16)
2 Rear cover
1 Two screws
       Tapping screw 
       (+PWH 4x16)
2 H2 Board
1 Two Hooks
3 A Board
– 6 –
KV-SZ292M50/M61/M81/N50/N60
RM-GA002
1-6.
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) Remove the rear cover.
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.
• 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
Turn up one side of the rubber cap in the direction
indicated by the arrow 
a.
Using a thumb pull up the rubber cap firmly in the direction
indicated by the arrow 
b.
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
Do not damage the surface of anode-caps with sharp
shaped objects.
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.
Do not turn the foot of rubber over too hard.
The shatter-hook terminal will stick out or damage the
rubber.
a
a
b
b
c
 Anode Button
qd
 Loosen the Deflection Yoke
fixing screw and remove
4
 Anode Cap Removal
7 Band, DGC Removal (x1)
     (KV-SZ292M80)   
5 CV Board Removal
6 Loosen the Neck Assembly
fixing screw and remove VM coil
9
 Holder, DGC Removal (x2)
     (not used for these models)
8
 Spring Extension Removal (x2)
qf
 Screw Tapping
     7+ Crown Washer
0
 Degaussing Coil
qs
 Supports, CRT(2) Removal
qa
 Earth Coating Assy
  
– 7 –
KV-SZ292M50/M61/M81/N50/N60
RM-GA002
CAUTION:
1.  Do not overpull the wire during dressing
     _> avoid disconnection of wires.
2.  Make sure wires are kept away from
     sharp edges, heatsinks & other
     hight-temperature parts.
Legend:
Hook
SECTION 2
WIRE DRESSING
W082
W077
P/N 1-923-512-11
W016
Dress both Lead Assy, Jumpers
along edge of shield case
P/N 1-910-026-28
Conn Assy,
5P YUV
CN905
Dress both Lead  
Assy, Jumpers
around CN905, C903
and below Conn
Assy, 5P YUV
C903
Dress Lead Assy, Jumper far
away from C514 and T501
W010
W065
W084
C514
T501
Keep Lead Assy, Jumpers
away from R121
 No. 
Part No. 
Description 
Block 
Remark
 
1 1-910-026-28 
Lead 
Assy, 
Jumper 
A(Var)
 W016-W084(1)
  
 
 
 
W077-W065(0)
 2  1-923-512-11  WIRE 
UL1007 
AWG24 
150MM 
ORG  A(Com)  W082-W010(1)
 No. 
Part No. 
Description 
Block 
Remark
 1  1-910-036-25 
Lead 
Assy, 
Jumper 
A(Var)  W075-W085(1)
W075
P/N 1-910-036-25
L2601
A003
A002
W085
Dress Lead Assy,
Jumper around C249
Dress Lead Assy, Jumper in
between C211 and L2601
C211
UL Tube
Dress between
A003 and A002
2-1.  Lead Assy, Jumper wire dressing at A board (only for Audio 6+6 Non DSP models)
2-2.  Dressing of Conn Assy, 4P VH
Dress Conn Assy, 4P VH into hook as shown.
CN6101
CN4102
Insert Connector Assy,
4P VH into holder
Page of 72
Display

Click on the first or last page to see other KV-SZ292M50 service manuals if exist.