DOWNLOAD Sony KLV-32NX520 / KLV-40NX520 Service Manual ↓ Size: 1.95 MB | Pages: 26 in PDF or view online for FREE

Model
KLV-32NX520 KLV-40NX520
Pages
26
Size
1.95 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
klv-32nx520-klv-40nx520.pdf
Date

Sony KLV-32NX520 / KLV-40NX520 Service Manual ▷ View online

KLV-32/40NX520(IN/VN)
8
SAFETY CHECK-OUT
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 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 0.75 V, 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 cold-water 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).
KLV-32/40NX520(IN/VN)
9
SELF DIAGNOSIS FUNCTION
DIAGNOSTIC TEST INDICATORS
When an error occurs, the STANDBY LED will flash a set number of times to 
indicate the possible cause of the problem.
If there is more than one error, the LED will identify the first of the problem areas.
Result for all of the following diagnostic items are displayed on screen.
If the screen displays a “0”, no error has occurred .
The units in this manual contain a self-diagnostic function. If an error occurs, the STANDBY LED will automatically begin to flash.
The number of times the LED flashes translates to a probable source of the problem.
A definition of the STANDBY LED flash indicators is listed in the instruction manual for the user’s knowledge and reference.
If an error symptom cannot be reproduced, the remote commander can be used to review the failure occurrence data stored in memory to reveal past problems and how often these 
problems occur.
STBY LED
Flash time
Service menu Item
name
(Screen Display)
Diagnostic Item Description
2
MAIN_POWE
Main Power Over Voltage Protection
DC_ALERT
DC_ALERT
AUDIO_PORT
Audio Abnorm al Detection
4
BALANCER
Balancer Error
TCON_ERR
T-con Error
PANEL_POWE
Panel Error
6
BACKLITE
Back Light Error (Panel Inverter)
7
TEMP_ERR
Therm al Error
8
-
Not us ed
9
-
Not us ed
10
-
Not us ed
11
-
Not us ed
12
-
Not us ed
3
5
0.5
0.5
3
DISPLAY OF STANDBY LED FLASH COUNT
SELF-DIAGNOSTIC SCREEN DISPLAY
For errors with symptoms such as “power sometimes shuts off” or “screen sometimes goes out” that cannot be confirmed, it is possible to bring up past occurrences of failure for 
confirmation on the screen:
[To Bring Up Screen Test]
In standby mode, press buttons on the remote commander sequentially in rapid succession as shown below:
5
*
 : Note that this differs from entering the service mode (volume +)
*
Info
TV POWER
Channel
Volume
KLV-32/40NX520(IN/VN)
10
SELF CHECK
BACK
<<
002 MAIN_POWER
000
003 AUDIO_PORT
000
003 DC_ALERT 
000
004 BALANCER   
000
005 TCON_ERR   
000
005 PANEL_POWE
000
006 BACKLITE   
000
007 TEMP_ERR   
000
12345‐67891‐23456
[Home] Exit
SELF DIAGNOSIS FUNCTION
[SELF DIAGNOSTIC SAMPLE SCREEN DISPLAY]
Error count
Item name
STBY LED flash time
Total operation time by hour
Boot count
Panel operation time by hour
Since the diagnostic results displayed on the screen are not automatically cleared, always check the self-diagnostic screen.
After you have completed the repairs, clear the result display to “0”.
Clearing the Self Check Diagnostic List
1. Error history and Error count :
Press the Channel 8 => Channel 0 .
2. Panel operation time :
Press the Channel 7 => Channel 0 .
Exiting the Self-diagnostic screen
To exit the Self Diagnostic screen, turn off the power to the TV by pressing the POWER button on the remote or the POWER button on the TV.
KLV-32/40NX520(IN/VN)
11
• Items with no part number and no description are not stocked because they are seldom required for roution service.
• The construction parts of an assembled part are indicated with a collation number in the remark colum.
• Items marked " * " are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items.
SEC 1. DISASSEMBLY AND PARTS LIST
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