Sony KLV-40X200A / KLV-40X250A / KLV-46X200A / KLV-46X250A (serv.man2) Service Manual ▷ View online
KLV-40/46X200A
, 40/46X250A (GE) 3
SAFETY CHECK-OUT
After correcting the original service problem, perform the
following safety checks before releasing the set to the customer:
1. Check the area of your repair for unsoldered or poorly-sol-
following safety checks before releasing the set to the customer:
1. Check the area of your repair for unsoldered or poorly-sol-
dered connections. Check the entire board surface for solder
splashes and bridges.
splashes and bridges.
2. Check the interboard wiring to ensure that no wires are
“pinched” or contact high-wattage resistors.
3. Check that all control knobs, shields, covers, ground straps,
and mounting hardware have been replaced. Be absolutely cer-
tain that you have replaced all the insulators.
tain that you have replaced all the insulators.
4. Look for unauthorized replacement parts, particularly transis-
tors, that were installed during a previous repair. Point them
out to the customer and recommend their replacement.
out to the customer and recommend their replacement.
5. Look for parts which, though functioning, show obvious signs
of deterioration. Point them out to the customer and recom-
mend their replacement.
mend their replacement.
6. Check the line cords for cracks and abrasion. Recommend the
replacement of any such line cord to the customer.
7. Check the antenna terminals, metal trim, “metallized” knobs,
screws, and all other exposed metal parts for AC Leakage.
Check leakage as described right.
Check leakage as described right.
LEAKAGE TEST
The AC leakage from any exposed metal part to earth ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes).
Leakage current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
The AC leakage from any exposed metal part to earth ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes).
Leakage current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’ instructions to use these
instruments.
instruments.
2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a
VOM or battery-operated AC voltmeter. The “limit” indica-
tion is 0.75 V, so analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex-
amples of a passive VOMs that are suitable. Nearly all battery
operated digital multimeters that have a 2 V AC range are suit-
able. (See Fig. A)
tion is 0.75 V, so analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex-
amples of a passive VOMs that are suitable. Nearly all battery
operated digital multimeters that have a 2 V AC range are suit-
able. (See Fig. A)
Fig. A. Using an AC voltmeter to check AC leakage.
1.5 k
Ω
0.15
µF
AC
Voltmeter
(0.75 V)
Voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Parts on Set
Earth Ground
WARNING!!
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY SHADING AND MARK
!
ON THE SCHEMATIC DIAGRAMS, EXPLODED VIEWS
AND IN THE PARTS LIST ARE CRITICAL FOR SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY. CIRCUIT ADJUSTMENTS THAT ARE
CRITICAL FOR SAFE OPERATION ARE IDENTIFIED IN
THIS MANUAL. FOLLOW THESE PROCEDURES WHEN-
EVER CRITICAL COMPONENTS ARE REPLACED OR
IMPROPER OPERATION IS SUSPECTED.
AND IN THE PARTS LIST ARE CRITICAL FOR SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY. CIRCUIT ADJUSTMENTS THAT ARE
CRITICAL FOR SAFE OPERATION ARE IDENTIFIED IN
THIS MANUAL. FOLLOW THESE PROCEDURES WHEN-
EVER CRITICAL COMPONENTS ARE REPLACED OR
IMPROPER OPERATION IS SUSPECTED.
KLV-40/46X200A
, 40/46X250A (GE) 4
TABLE OF CONTENTS
1. DISASSEMBLY ............................................... 1-1
1-1. REAR CABINET ASSY REMOVAL ................... 1-1
1-2. STAND ASSY REMOVAL ................................... 1-2
1-3. SPEAKER REMOVAL ......................................... 1-2
1-4. H1 BOARD REMOVAL ....................................... 1-3
1-5. H2 BOARD REMOVAL ....................................... 1-3
1-6. G1, D1 AND D2 BOARDS REMOVAL .............. 1-4
1-7. D3 BOARD REMOVAL ....................................... 1-5
1-8. AG BOARD REMOVAL ...................................... 1-5
1-9. B2, FXE AND TUG BOARDS REMOVAL ........ 1-6
1-10. H3 AND H4 BOARDS REMOVAL ..................... 1-7
1-11. CHASSIS BRACKET ASSY REMOVAL ........... 1-7
1-12. LCD PANEL REMOVAL ..................................... 1-8
2. DIAGRAMS ..................................................... 2-1
2-1. BLOCK DIAGRAM .............................................. 2-1
2-2. FRAME DIAGRAMS ............................................ 2-2
(1)
KLV-40X200A
/40X250A ............................... 2-2
(2)
KLV-46X200A
/46X250A ............................... 2-3
2-3. CIRCUIT BOARDS LOCATION ......................... 2-4
(1)
KLV-40X200A
/40X250A ............................... 2-4
(2)
KLV-46X200A
/46X250A ............................... 2-4
2-4. SCHEMATIC DIAGRAMS AND PRINTED
WIRING BOARDS ............................................... 2-4
(1)
Schematic Diagrams of AG Board (1/9-9/9) .. 2-5
(2)
Schematic Diagrams of B2 Board
(1/15-15/15) .................................................... 2-16
(3)
Schematic Diagram of D1 Board
(
KLV-40X200A
/40X250A) ........................... 2-33
(4)
Schematic Diagram of D2 Board
(
KLV-46X200A
/46X250A) ........................... 2-35
(5)
Schematic Diagram of D3 Board
(
KLV-46X200A
/46X250A) ........................... 2-37
(6)
Schematic Diagrams of FXE Board
(1/7-7/7) ......................................................... 2-39
(7)
Schematic Diagram of G1 Board ................... 2-48
(8)
Schematic Diagram of H1 Board .................. 2-50
(9)
Schematic Diagram of H2 Board .................. 2-51
(10) Schematic Diagram of H3 Board .................. 2-53
(11) Schematic Diagram of H4 Board .................. 2-54
(12) Schematic Diagrams of TUG Board .............. 2-55
2-5. SEMICONDUCTORS ......................................... 2-57
3. EXPLODED VIEWS ........................................ 3-1
3-1. REAR CABINET AND STAND ASSY ............... 3-2
3-2. ARM AND UNDER COVER ................................ 3-3
3-3. CHASSIS-1 ............................................................ 3-4
3-4. CHASSIS-2 ............................................................ 3-5
3-5. CHASSIS BRACKET ASSY AND SPEAKER .... 3-6
3-6. BEZEL ASSY AND LCD PANEL ....................... 3-7
3-7. PACKING MATERIALS ...................................... 3-8
4. ELECTRICAL PARTS LIST ............................ 4-1
KLV-40/46X200A
, 40/46X250A (GE) 1-1
1-1. REAR CABINET ASSY REMOVAL
SECTION 1
DISASSEMBLY
KLV-
46X200A
/
46X250A
5
Rear Cabinet
5
Rear Cabinet
3
One screw
(+BVTP 3X12)
3
One screw
(+BVTP 3X12)
4
Fourteen screws
(+BVTP2 4X16)
4
Fourteen screws
(+BVTP2 4X16)
2
One screw
(+BVST 4X12)
2
One screw
(+BVST 4X12)
2
Two screws
(+BVST 4X12)
2
Two screws
(+BVST 4X12)
1
Two screws
(+PSW M5X12)
1
Two screws
(+PSW M5X12)
KLV-40/46X200A
, 40/46X250A (GE) 1-2
1-2. STAND ASSY REMOVAL
1-3. SPEAKER REMOVAL
3
Two screws
(+BVST M4X12)
6
Two screws
(+BVST M4X12)
4
One screw
(+BVST M4X12)
1
Two screws
(+PSW M5X12)
1
Two screws
(+PSW M5X12)
2
Base Stand assy
5
Frame(R)
assy
8
Frame(L)assy
7
One screw
(+BVST M4X12)
KLV-
46X200A
/46X250A
1
One screw
(+PWTP2 4X16)
1
One screw
(+PWTP2 4X16)
3
One screw
(+PWTP2 4X16)
3
One screw
(+PWTP2 4X16)
2
Loudspeaker(L)
2
Loudspeaker(L)
4
Loudspeaker(R)
4
Loudspeaker(R)
