Sony KLV-37M300A Service Manual

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SERVICE MANUAL

LCD Colour TV

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ORIGINAL MANUAL ISSUE DATE: 4/2007

REVISION DATE SUBJECT

8/2007 Correction of 3-5. Average Value of W/B and update of 6-1., 6-2. REPLACEMENT PARTS

LIST.

9-834-175-02

HISTORY INFORMATION FOR THE FOLLOWING MANUAL:

MODEL NAME REMOTE COMMANDER DESTINATION

KLV-32M300A

RM-SA012 CHINA

KLV-37M300A

RM-SA012 CHINA

00000

077

6-

1.

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SERVICE MANUAL

LCD Colour TV

LAX U

CHASSIS

MODEL NAME REMOTE COMMANDER DESTINATION

KLV-32M300A

RM-SA012 CHINA

KLV-37M300A

RM-SA012 CHINA

9-834-175-02

KLV-32M300A/KLV-37M300A RM-SA012

RETURN

MENU

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POWER SAVING

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KLV-32/37M300A2

TABLE OF CONTENTS :

SPECIFICATIONS 3

WARNINGS AND CAUTIONS 5

SAFETY-RELATED COMPONENT WARNING 6

SAFETY CHECK-OUT 8

SECTION 1 : DISASSEMBLY 9

SECTION 2 : SERVICE MODE (factory mode) 15

SECTION 3 : ADJUSTMENT 17

3-1. Preparation 17

3-2. Adjust White Balance of "COOL" temperature; 17

3-3. Adjust White Balance of "NEUTRAL" temperature; 17

3-4. Adjust White Balance of "WARM" temperature; 17

3-5. Average Value of W/B 17

SECTION 4 : TIMING CHART 18

SECTION 5 : DIAGRAMS 19

5-1. BOARD Layout/WIRING Layout 19

5-1-1. KLV-32M300A 19

5-1-2. KLV-37M300A 20

5-2. Frame Diagram 21

5-3. BLOCK DIAGRAM 22

5-4. SCHEMATIC 23

5-5. PCB Layout 43

SECTION 6 : EXPLODED VIEW & REPLACEMENT PARTS LIST 49

6-1. KLV-32M300A 49

6-2. KLV-37M300A 52

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3 KLV-32/37M300A

SPECIFICATIONS :

* Dimensions and mass are approximate values.

Model name KLV-37M300A KLV-32M300A

System

Panel System LCD (Liquid Crystal Display) Panel

TV System D/K, B/G, I, M

Colour System PAL, PAL60 (only Video In), NTSC4.43 (only Video In), NTSC3.58

Channel Coverage D/K: VHF: C1 to C12, R1 to R12/ UHF: C13 to C57, R21 to R60/ CATV: S01 to

S03, S1 to S41, Z1 to Z39

I: UHF: B21 to B69/ CATV: S01 to S03, S1 to S41

B/G: VHF: E2 to E12/ UHF: E21 to E69/ CATV: S01 to S03, S1 to S41

M: VHF: A2 to A13/ UHF: A14 to A79/ CATV: A-8 to A-2, A to W+4, W+6 to W+84

Sound Output 10 W + 10 W (as distortion of 7%)

Input/Output jacks

Antenna 75 ohms external terminal

1, 2 S video input (4-pin mini DIN)

Y: 1.0 Vp-p, 75 ohms unbalanced/C: 0.286 Vp-p (Burst signal), 75 ohms

1, 2 Video input (phono jacks): 1 Vp-p, 75 ohms unbalanced, sync negative

1, 2 Audio input (phono jacks): 500 mVrms, Impedance: 47 kilohms

1, 2 Component input (phone jacks)

Supported formats: 1080p, 1080i, 720p, 576p, 576i, 480p, 480i

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

B/PB

: 0.7 Vp-p, 75 ohms/

P

R/CR

: 0.7 Vp-p, 75 ohms

1, 2 Audio input (phono jacks): 500 mVrms, Impedance: 47 kilohms

Video output (phono jack): 1 Vp-p, 75 ohms unbalanced, sync negative

Audio output (phono jacks): 500 mVrms (100% modulation)

HDMI IN Video: 1080p, 1080i, 720p, 576p, 576i, 480p, 480i

Audio: Two channel linear PCM 32, 44.1 and 48 kHz, 16, 20 and 24 bits

Analogue audio input (phono jacks): 500 mVrms, Impedance: 47 kilohms

PC IN (RGB) PC Input (D-sub 15-pin)

G: 0.7 Vp-p, 75 ohms, non Sync on Green/B: 0.7 Vp-p, 75 ohms/

R: 0.7 Vp-p, 75 ohms/HD: 1-5 Vp-p/VD: 1-5 Vp-p

PC IN PC audio input (minijack): 500 mVrms, Impedance: 47 kilohms

Headphones jack

Power and others

Power Requirements 220 V AC, 50 Hz

Viewing Screen Size (diagonal) 94 cm (37 inches) 80 cm (32 inches)

Display Resolution 1,366 pixels (horizontal) × 768 lines (vertical)

Power Consumption 155 W 140 W

Dimensions

(w × h × d)*

with stand (mm) 918 × 656 × 264 796 × 591 × 214

without stand (mm) 918 × 609 × 108 796 × 544 × 99

Mass* with stand (kg) 21.0 16.5

without stand (kg) 18.0 14.0

Product usage condition

Environment Temperature 5°C - 35°C

Humidity 20% - 80%

Air Pressure 86 kPa - 106 kPa

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4 KLV-32/37M300A

Design and specifications are subject to change without notice.

PC Input Signal Reference Chart

• This TV’s PC input does not support Sync on Green or Composite Sync.

• This TV’s PC input does not support interlaced signals.

• For the best picture quality, it is recommended to use the signals (boldfaced) in the above chart with a 60 Hz
vertical frequency from a personal computer. In plug and play, signals with a 60 Hz vertical frequency will be
selected automatically.

Signals

Horizontal
(Pixel)

Vertical (Line)

Horizontal
frequency (kHz)

Vertical
frequency (Hz)

Standard

VGA 640 480 31.5 60 VGA

640 480 37.5 75 VESA

720 400 31.5 70

VGA-T

SVGA 800 600 37.9 60 VESA Guidelines

800 600 46.9 75 VESA

XGA 1024 768 48.4 60 VESA Guidelines

1024 768 56.5 70 VESA

1024 768 60 75 VESA

WXGA 1280 768 47.4 60 VESA

1280 768 47.8 60 VESA

1360 768 47.7 60 VESA

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5 KLV-32/37M300A

WARNINGS AND CAUTIONS

CAUTION

These servicing instructions are for use by qualified service personnel only. To reduce the risk of electric shock, do not perform any
servicing other than that contained in the operating instructions unless you are qualified to do so.

WARNING!!

An isolation transformer should be used during any service to avoid possible shock hazard, because of live chassis.The chassis of
this receiver is directly connected to the ac power line.

!

SAFETY-RELATED COMPONENT WARNING!!

Replace all components with Sony parts whose part numbers appear as shown in this manual or in supplements
published by Sony.

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6 KLV-32/37M300A

SAFETY-RELATED COMPONENT WARNING

It is essential that all critical parts be replaced only with the part number specified in the electrical parts list to prevent electric shock,
fire, or other hazard.

NOTE: Do not modify the original design without obtaining written permission from the manufacturer or you will void the original parts and
labor guarantee.

USE CAUTION WHEN HANDLING THE LCD PANEL

When repairing the LCD panel, be sure you are grounded by using a wrist band.

To avoid damaging the LCD panel:

do not press on the panel or frame edge to avoid the risk of electric shock.
do not scratch or press on the panel with any sharp objects.
do not leave the module in high temperatures or in areas of high humidity for an extended period of time.
do not expose the LCD panel to direct sunlight.
avoid contact with water. It may cause a short circuit within the module.
disconnect the AC power when replacing the backlight (CCFL) or inverter circuit.
(High voltage occurs at the inverter circuit at 650Vrms.)
always clean the LCD panel with a soft cloth material.
use care when handling the wires or connectors of the inverter circuit. Damaging the wires may cause a short.
protect the panel from ESD to avoid damaging the electronic circuit (C-MOS).

LEAKAGE CURRENT HOT CHECK CIRCUIT

AC Volt-meter

To Instruments
exposed

METALLIC PARTS

1.5 Kohm/10W

Good Earth Ground
Such as WATER PIPE,
CONDUIT etc.

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7 KLV-32/37M300A

The circuit boards used in these models have been processed using
Lead Free Solder.
The servicing of these boards requires special precautions to be taken
as outlined below.

It is strongly recommended to use Lead Free Solder material in order to guarantee optimal quality of new solder joints.
Lead Free Solder is available under the following part numbers:

Due to the higher melting point of Lead Free Solder the soldering iron tip temperature needs to be set to 370 degrees centigrade.
This requires soldering equipment capable of accurate temperature control coupled with a good heat recovery characteristics.

For more information on the use of Lead Free Solder, please refer to http://www.sony-training.com

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8 KLV-32/37M300A

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 sol­dered connections. Check the entire board surface for solder
splashes and bridges.

2. Check the interboard wiring to ensure that no wires are
“pinched” or touching high-wattage resistors.

3. Check that all control knobs, shields, covers, ground straps,
and mounting hardware have been replaced. Be absolutely cer­tain that you have replaced all the insulators.

4. Look for unauthorized replacement parts, particularly transis­tors, 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 recom­mend 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 below.

LeakageTest

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
instructions.

2. A battery-operated AC milliampmeter. 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” indica­tion is 0.75V, so analog meters must have an accurate low volt­age scale.
The Simpson’s 250 and Sanwa SH-63TRD are examples of
passive VOMs that are suitable. Nearly all battery-operated
digital multimeters that have a 2 VAC range are suitable (see
Figure A).

How to Find a Good Earth Ground

A cold-water pipe is a guaranteed earth ground; the cover-plate
retaining screw on most AC outlet boxes is also at earth ground. If
the retaining screw is to be used as your earth ground, verify that
it is at ground by measuring the resistance between it and a cold­water pipe with an ohmmeter. The reading should be zero ohms.

If a cold-water pipe is not accessible, connect a 60- to 100-watt
trouble- light (not a neon lamp) between the hot side of the
receptacle and the retaining screw. Try both slots, if necessary, to
locate the hot side on the line; the lamp should light at normal
brilliance if the screw is at ground potential (see Figure B).

To Exposed Metal
Parts on Set

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AC
Voltmeter
(0.75V)

Figure A. Usingan AC voltmeter to check AC leakage.

Figure B. Checking for earth ground.

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KLV-32/37M300A9

SECTION 1 : DISASSEMBLY

STEP PICTURE DESCRIPTION

Gently place the TV set
face down on the table.

KLV-32M300A:
Remove 3 screws to
release the Tabletop
Stand from the unit.

KLV-37M300A:
Remove 4 screws to
release the Tabletop
Stand from the unit.

Service Position

Stand Removal

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KLV-32/37M300A10

Rear Cover
Removal

Wall Mount
Bracket
Removal

STEP PICTURE DESCRIPTION

KLV-32M300A:
Remove 16 screws to
release the rear cover.

KLV-37M300A:
Remove 16 screws to
release the rear cover.

Remove 6 screws to
release the Wall Mount
Bracket.

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KLV-32/37M300A11

Cover Sheet
Removal

Botton ASSY
Removal

H1 Mount
Removal

Key Cover and
Multi Botton
Removal

H2 Mount
Removal

STEP PICTURE DESCRIPTION

Remove 1 screw to
release the Cover
Sheet.

Remove function cable
from function board
connector.

Bend key cover hooks
to release function
board.

Dismantle function key
form function key cover.

Remove 2 screws and
1 connector to release
the H2 Mount.

Multi Button

Function Key Cover

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KLV-32/37M300A12

H3 Mount
Removal

AC Inlet Removal

G Mount Removal

STEP PICTURE DESCRIPTION

Remove 1 screw and
1 connector to release
the H3 Mount.

Remove 1 screw and
1 connector to release
the AC Inlet.

Remove 6 screws and
3 connectors to release
the G Mount.

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KLV-32/37M300A13

Shield Case
Removal

A Mount Removal

Bezel Removal

STEP PICTURE DESCRIPTION

Remove 10 screws to
release the Shield
Case.

Remove 5 screws and
9 connectors to release
the A Mount.

KLV-32M300A/
37M300A:
Remove 10 screws to
release the Bezel.

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KLV-32/37M300A14

LCD Panel
Removal

STEP PICTURE DESCRIPTION

KLV-32M300A:
Remove 10 screws to
release the LCD Panel.

KLV-37M300A:
Remove 14 screws to
release the LCD Panel.

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15 KLV-32/37M300A

SECTION 2 : SERVICE MODE (factory mode)

To adjust various set features, use the Remote Commander to put the set into service mode to display the service menu. Input the signal
to monitor, please confirm that there is no OSD before enter the service mode.

To exit "service mode", press the MENU button

1) Press “LEFT”button

2) Press “RIGHT” button

3) Press “MUTE” button

4) Press “ENTER” button

5) Press “MUTE” button

6) Press “MENU” button

INPUT SOURCE [ VIDEO1 ]
WHITE BALANCE [ Off ]
INTERNAL PATTER [ Off ]

COLOR TEMP. [

Neutral

]
R GAIN [ 229 ]
G GAIN [ 230 ]
B GAIN [ 235 ]

R OFFSET [ 124 ]
G OFFSET [ 125 ]
B OFFSET [ 123 ]

AGING MODE [ Off ]
ADC CALIBRATION [ Off ]
FACTORY RESET [ Off ]

VGA EDID Prot. [ Off ]

HDMI EDID Prot. [ Off ]

ALL RESET [ Off ]

Recall Data [ Off ]

PANEL VERSION: AUO_32

FW: A, 1
MODEL: KLV-32M300A

Factory Menu

Menu : Save / Exit Menu

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