DOWNLOAD Sony KLV-L23M1 Service Manual ↓ Size: 8.17 MB | Pages: 74 in PDF or view online for FREE

AEP Model

Power Requirement:

220–240 V AC, 50 Hz

Screen Size:

23 inches
Approx. 58.4 cm measured diagonally

Display Resolution:

1,366 dots (horizontal)

× 

768 lines (vertical)

Power Consumption:

89 W

Standby Power Consumption:

0.7 W or less

Dimensions (w

× 

h

× 

d): 

Approx. 605

× 

525

× 

242 mm (with stand)

Approx. 605

× 

475

× 

102 mm (without stand)

Weight: 

Approx. 11.6 kg (with stand)
Approx. 10.0 kg (without stand)

LCD (Liquid Crystal Display) Panel

Depending on your country/region selection:
B/G/H, D/K, L, I 

PAL, SECAM
NTSC 3.58, 4.43 (only Video In)

75 ohms external terminal for VHF/UHF

VHF: E2–E12
UHF: E21–E69
CATV: S1–S20
HYPER:

S21–S41

D/K: R1–R12, 

R21–R69

L:

F2–F10, B–Q, F21–F69

I: UHF 

B21–B69

/

1

21-pin Scart connector (CENELEC standard) including 
audio/video input, RGB input, and TV audio/video output.

/

2 (SMARTLINK) 

21-pin Scart connector (CENELEC standard) including 
audio/video input, S video input, selectable audio/video 
output, and SmartLink interface.

3

Component input (phono jacks)

Y: 1 Vp-p, 75 ohms, 0.3V negative sync
P

B

: 0.7 Vp-p, 75 ohms

P

R

: 0.7 Vp-p, 75 ohms

3

Audio input (phono jacks)
Impedance: 47 kilo ohms

4

S video input (4-pin mini DIN)

4

Video input (phono jack)

4

Audio input (phono jacks)
Impedance: 47 kilo ohms

Audio output (Left/Right) (phono jacks)

i

Headphones jack

KLV-L32M1 (AEP)     2

4.0 W + 4.0 W

•

RM-Y1102 (1)

• Size AA batteries (R6 type) (2)
• Coaxial cable (1)
• Mains lead (Type C-6) (1)
• Mains lead (Type BF) (1)

• Wall-Mount Bracket SU-W210

• Teletext, Fastext and TOPtext
• Sleep Timer
• SmartLink (Direct link between your TV and a compatible

VCR or DVD recorder. For more information on SmartLink,
please refer to the instruction manual of your VCR or DVD 
recorder.)

• TV system autodetection
• Auto Format
• Screen Memo
• NexTView (depending on availability of service)

Mainslead Type BF may not be supplied depending on 
the country.

Remote control

KLV-L

23M1 (AEP)     3

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-

dered connections. Check the entire board surface for solder
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.

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.

5. Look for parts which, though functioning, show obvious signs

of deterioration. Point them out to the customer and recom-
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.

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

WT-540A. Follow the manufacturers’ instructions to use these
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)

Fig. A. Using an AC voltmeter to check AC leakage.

Ω

µF

!

KLV-L23M1(AEP)     

4

1-1.

STAND REMOVAL .......................................... 1-1

1-2.

REAR CABINET ASSY REMOVAL ............... 1-1

1-3.

G2 BOARD REMOVAL ................................... 1-2

1-4.

U1 BOARD REMOVAL ................................... 1-2

1-5.

TU AND U2 BOARDS REMOVAL ................. 1-3

1-6.

A AND B BOARDS REMOVAL ...................... 1-3

1-7.

LCD PANEL REMOVAL ................................. 1-4

1-8.

H1 BOARD REMOVAL ................................... 1-5

1-9.

H2 BOARD REMOVAL ................................... 1-5

2-1.

AGING CONDITION ........................................ 2-1

2-2.

WHITE BALANCE ADJUSTMENT ................ 2-1

2-2-1. White balance of Color temperature “Cool” . 2-1

2-2-2. White balance of Color temperature “Normal” 2-1

2-2-3. White balance of Color temperature “Warm” 2-2

3-1.

BLOCK DIAGRAMS ........................................ 3-1

3-2.

FRAME DIAGRAMS ........................................ 3-5

3-3.

CIRCUIT BOARDS LOCATION ..................... 3-6

3-4.

SCHEMATIC  DIAGRAMS AND  PRINTED

 WIRING  BOARDS .......................................... 3-6

(1)

Schematic Diagrams of A Board ................... 3-7

(2)

Schematic Diagrams of B Board ................... 3-14

(3)

Schematic Diagrams of G2 Board ................. 3-20

(4)

Schematic Diagram of H1 and H2 Boards .... 3-22

(5)

Schematic Diagrams of TU and U2 Boards .. 3-23

(6)

Schematic Diagrams of U1 Board ................. 3-24

3-5.

SEMICONDUCTORS ....................................... 3-25

4-1.

CABINET ASSY AND STAND ....................... 4-2

4-2.

CHASSIS-1 ........................................................ 4-3

4-3.

CHASSIS-2 ........................................................ 4-4

4-4.

BEZEL ASSY .................................................... 4-5

4-5.

PACKING MATERIALS .................................. 4-6