Thursday, November 12, 2015

SONY KLV-32W400A - 40W400A - 46W400A - 52W400A LED BLINKING AND SERVICE MODE

SONY KLV-32W400A - 40W400A - 46W400A - 52W400

LED BLINKING AND SERVICE MODE 

How to enter the Service Mode
Service adjustments to this model can be performed using the supplied Remote Commander.
1. Turn on the power to the TV set and enter into the stand-by mode.
2. Press the following sequence of buttons on the Remote Commander.
INFORMATION > DIGIT 5 > VOLUME UP > POWER ON
Changing TVM Data Settings
1. Press “2 / 5” on the remote commander to select (up / down) category
2. Press “1 / 4” on the remote commander to select (up / down) item
3. Press “3 / 6” on the remote commander to select (up / down) data
Writing TVM Data
1.Press “Mute” on the remote commander. The word “SERVICE” changes to “WRITE”.
2. Press “0” on the remote commander. The word “WRITE” changes to red. This indicates writing is in progess.
3.When red “WRITE” changes to green “SERVICE”. This indicates writing is complete.
SELF DIAGNOSIS 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.
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.
LED BLINKING AND CAUSES 
Number of times STANDY LED
(Red) flashes
Monitoring Items
(Screen Display)

Diagnostic Item Description


2 times
DC_DET
Main power supply voltage error (12V, etc)
3 times
DC_ALERT1
Malfunction of 3.3V line (Trident circuit, etc)
4 times
DC_ALERT2
Malfunction of 5V line(Voltage Supply to FE, etc)
5 times
DC_ALERT3
Malfunction of power supply for screen
6 times
BACKLIGHT
Malfunction of inverter or overcurrent, etc
7 times
TEMPERATURE
Abnormal temperature inside unit
8 times
AUDIO
Audio circuit error (amplifier, etc.)
10 times
DEF
Digital FE circuit error
11 times
B-ENGINE
Malfunction of Trident IC or around IC
12 times
HFR
BH board error
13 times
(No item on screen display)
Malfunction of balancer

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:
INFORMATION > DIGIT 5 > VOLUME DOWN > POWER ON
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-32W400A REAR COVER AND STAND ASSY REMOVAL

KLV-40W400A REAR COVER AND STAND ASSY REMOVAL

KLV-52W400A REAR COVER AND STAND ASSY REMOVAL

SONY TV SERVICE TIPS
SONY KV32XBR35
SHUT DOWN 
Unit will shut down each time the Remote
headphones circuit is turned on.
SOLUTION
Unit has an intermittent short to ground on the IR12 volt line located at the output of IC202(3-4) located on the "A" board. This short was caused by a solder splace on that circuit
SONY KV32V16
SHUT DOWN 
KV32V16 serial 7089163 Unit will not stay on. Goes into shut down immediately after turn on.
SOLUTION 
When HV comes up the signal at the Collector of the horizontal output transistor is normal. No shorts can be found in the power supply. PM501(1-810-061-21) & IC601. PM501 was to culprit in this case.
KV32XBR45
WEAK VIDEO
Sony KV32XBR45 Unit has a very faint picture But the OSD is fine. Problem shows up in the tuner and video input mode. Tech ordered Q401 but did not correct the symptom
SOLUTION
There is video at the base of Q401 but not at the emitter. Q401 measures 9 volts on all elements. Base must be 4.5 volts. Transistor is in cut off. Bases and emitter are the same 9 volts. Unit has open R617 a 680 ohm resistor.