Sony KLV-20S400A / KLV-32S400A / KLV-37S400A / KLV-40S400A Service Manual ▷ View online
KLV-20/32/37/40S400A (CH) 6
SELF DIAGNOSIS FUNCTION
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.
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.
1-1. 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 .
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 .
Number of times
Monitoring Items
STANDY LED
(Screen Display)
Diagnostic Item Description
(Red) flashes
2 times
DC_DET
Power supply voltage error
3 times
DC_ALERT 1
Confirm the voltage at F7016 is about 3.3V and F7016 is not
open.
Confirm the voltage at F7015 is about 5V and F7015 is not
open.
open.
Confirm the voltage at F7015 is about 5V and F7015 is not
open.
4 times
DC_ALERT 2
Confirm the voltage at F7017 is about 1.8V and F7017 is not
open.
Confirm the voltage at C7110 is about 5.5V and F7012 is not
open. (Only applicable for AM series)
open.
Confirm the voltage at C7110 is about 5.5V and F7012 is not
open. (Only applicable for AM series)
5 times
DC_ALERT 3
Confirm if F7003 is open.
Confirm voltage at either pin 5, 6, 7 or 8 of IC7009 is the
following:
12V
Confirm voltage at either pin 5, 6, 7 or 8 of IC7009 is the
following:
12V
6 times
BACKLIGHT/INVERTER ERROR
Confirm if input to Q9008 is about 3.3V.
7 times
INTERNAL TEMP ERROR
If internal temperature of the LCD set increases over 70
°
C
it will shut down and the set goes to standby.
8 times
AUDIO ERROR
Confirm the correct value at AU_13V, AU_12V (=10V).
Confirm the speaker is OK, speaker terminal is not shorted to
GND.
Change IC2007 to a new one.
Confirm the speaker is OK, speaker terminal is not shorted to
GND.
Change IC2007 to a new one.
9 times
FAN ERROR
Fan error.
10 times
DEF ERROR
Digital EF circuit error.
11 times
NVM ERROR
NVM is broken.
No power supply to NVM.
No power supply to NVM.
12 times
IIC ERROR
No communication between IC9000 and IC3000.
13 times
BALANCER ERROR
Confirm if input to Q9009 is about 3.3V.
14 times
HDMI ERROR
-
KLV-20/32/37/40S400A (CH) 7
1-2. DISPLAY OF STANDBY/TIMER LIGHT FLASH COUNT
5
*
* : Note that this differs from entering the service mode (volume +)
2 times
4 times
5 times
LED ON 0.3 sec.
LED OFF 0.3 sec.
LED OFF
2 sec.
[ FLASH COUNT ]
Note: One flash counts is not self-diagnostic.
< KLV-32/37/40S400A >
< KLV-20S400A >
1-3. STOPPING THE STANDBY FLASH
Turn off the power switch on the TV main unit or unplug the power cord from the outlet to stop the STANDBY LED from flashing.
1-4. 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:
bring up past occurrences of failure for confirmation on the screen:
1-4-1. To Bring Up Screen Test
In standby mode, press buttons on the remote commander sequentially in rapid succession as shown below:
1-5. Quitting Self-diagnostic screen
To quit the entire self-diagnostic screen, turn off the power switch on the remote commander or the main unit.
KLV-20/32/37/40S400A (CH) 8
TABLE OF CONTENTS
SAFETY CHECK-OUT ............................................. 5
SELF DIAGNOSIS FUNCTION ................................ 6
1. DISASSEMBLY ............................................... 1-1
1-1.
KLV-32S400A ....................................................... 1-1
1-1-1.
REAR COVER ASSY AND STAND ASSY
REMOVAL ...................................................... 1-1
1-1-2.
BG1 BOARD REMOVAL .............................. 1-2
1-1-3.
GP BOARD REMOVAL ................................. 1-2
1-1-4.
FRAME REMOVAL ....................................... 1-3
1-1-5.
SPEAKER AND HG4 BOARD
REMOVAL ...................................................... 1-4
1-1-6.
LCD PANEL REMOVAL ............................... 1-4
1-2.
KLV-37S400A ....................................................... 1-5
1-2-1.
REAR COVER ASSY AND STAND ASSY
REMOVAL ...................................................... 1-5
1-2-2.
BG1 BOARD REMOVAL .............................. 1-6
1-2-3.
POWER UNIT REMOVAL ............................ 1-6
1-2-4.
FRAME REMOVAL ....................................... 1-7
1-2-5.
SPEAKER REMOVAL ................................... 1-8
1-2-6.
LCD PANEL AND HG4 BOARD
REMOVAL ...................................................... 1-8
1-3.
KLV-40S400A ....................................................... 1-9
1-3-1.
REAR COVER ASSY AND STAND ASSY
REMOVAL ...................................................... 1-9
1-3-2.
BG1 AND IP5 BOARDS REMOVAL .......... 1-10
1-3-3.
AC INLET AND UNDER COVER
REMOVAL .................................................... 1-10
1-3-4.
FRAME REMOVAL ..................................... 1-11
1-3-5.
SPEAKER REMOVAL ................................. 1-12
1-3-6.
LCD PANEL AND HG4 BOARD
REMOVAL .................................................... 1-12
1-4.
KLV-20S400A ..................................................... 1-13
1-4-1.
REAR COVER, STAND ASSY AND H1S
BOARD REMOVAL ..................................... 1-13
1-4-2.
BG1 BOARD REMOVAL ............................ 1-13
1-4-3.
GD BOARD AND BOTTOM FRAME
REMOVAL .................................................... 1-14
1-4-4.
INVERTER BOARD AND LCD BRACKET
REMOVAL .................................................... 1-15
1-4-5.
SPEAKER AND H3S BOARD
REMOVAL .................................................... 1-16
1-4-6.
LCD PANEL REMOVAL ............................. 1-16
2. DIAGRAMS ..................................................... 3-1
2-1.
BLOCK DIAGRAM .............................................. 3-1
2-2.
CIRCUIT BOARDS LOCATION ......................... 3-2
(1)
KLV-32S400A ................................................. 3-2
(2)
KLV-37S400A ................................................. 3-2
(3)
KLV-40S400A ................................................. 3-2
(4)
KLV-20S400A ................................................. 3-2
3. EXPLODED VIEWS ........................................ 3-1
3-1.
KLV-32S400A ....................................................... 3-2
3-1-1.
REAR COVER ASSY AND STAND ASSY .. 3-2
3-1-2.
CHASSIS-1 ...................................................... 3-3
3-1-3.
CHASSIS-2 ...................................................... 3-4
3-2.
KLV-37S400A ....................................................... 3-5
3-2-1.
REAR COVER ASSY AND STAND ASSY .. 3-5
3-2-2.
CHASSIS-1 ...................................................... 3-6
3-2-3.
CHASSIS-2 ...................................................... 3-7
3-3.
KLV-40S400A ....................................................... 3-8
3-3-1.
REAR COVER ASSY AND STAND ASSY .. 3-8
3-3-2.
CHASSIS-1 ...................................................... 3-9
3-3-3.
CHASSIS-2 .................................................... 3-10
3-4.
KLV-20S400A ..................................................... 3-11
3-4-1.
REAR COVER ASSY AND STAND
ASSY .............................................................. 3-11
3-4-2.
CHASSIS-1 .................................................... 3-12
3-4-3.
CHASSIS-2 .................................................... 3-13
3-5.
PACKING MATERIALS .................................... 3-14
3-5-1.
KLV-32S400A ............................................... 3-14
3-5-2.
KLV-37S400A ............................................... 3-15
3-5-3.
KLV-40S400A ............................................... 3-16
3-5-4.
KLV-20S400A ............................................... 3-17
KLV-20/32/37/40S400A (CH) 1-1
1-1. KLV-32S400A
1-1-1. REAR COVER ASSY AND STAND ASSY REMOVAL
SECTION 1
DISASSEMBLY
1
Three screws
(+PSW M5X16)
4
One screw
(+PSW M5X16)
5
Two screws
(+PSW M3X5)
3
Eleven screws
(+BVTP2 4X16)
3
Five screws
(+BVTP2 4X16)
6
Two screws
(+BV 3X12)
2
Stand assy
7
Rear cover assy
8
Switch unit
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