Tuesday, November 10, 2015

SONY KDL-40U4000 LED BLINKING CODES SERVICE MODE AND POWER SUPPLY CIRCUIT

SONY KDL-40U4000 

LED BLINKING CODES AND SERVICE MODE 

SELF DIAGNOSTIC 
The identification of errors within the EG1L-L chassis is triggered in one of two ways :- 1: Busy or 2: Device failure to respond to IIC. In the event of one of these situations arising the software will first try to release the bus if busy (Failure to do so will report with a continuous flashing LED) and then communicate with each device in turn to establish if a device is faulty. If a device is found to be faulty the relevant device number will be displayed through the LED (Series of flashes which must be counted).
LED BLINKING CODES
Number of LED Flashes
Error Description
02
DC_DET (12V main voltage).
06
Panel Det error.
07
Internal temperature error.
08
Audio error (SP protection).
10
Digital error.
11
NVM error.
12
I2C error VCT.
13
Balancer error.
14
HDMI error.
15
Tuner Error
16
I2C CH1 (VERD TAS).
17
I2C CH0 (VERD NVM/RTC).
21
VCT error
22
MSP error.

Rear Cover Removal
To remove the ‘Rear cover’ remove the 23 fixing screws indicated and pull the rear cover gently backwards away from the TV set.

How to enter the Service Mode
Service adjustments to this model can be performed using the supplied Remote Commander RM-ED013.
1. Turn on the power to the TV set and confirm it’s in analogue mode. Then put the TV set into stand-by mode.
2. Press the following sequence of buttons on the Remote Commander.
(ON SCREEN DISPLAY) > (DIGIT 5) > (VOLUME +) > (TV)
4. Move to the corresponding adjustment item using the ‘UP ’ or ‘ DOWN’ arrow buttons on the Remote Commander.
5. Press the ‘RIGHT ’ arrow button to enter into the required menu item.
6. Adjust the data value using the ‘ UP ’ or ‘DOWN  ’ arrow buttons on on the Remote Commander.
7. To go back at any time press the ‘Return’ button on the Remote Commander.
8. Press the ‘Menu’ button on the Remote Commander to quit
the Service Mode when all adjustments have been completed.
To place the Remote Commander in ‘Service Mode’ press the following buttons together for two seconds.
(ON SCREEN DISPLAY) >  (DIGIT 5) > (VOLUME +)
To use the Remote Commander in ‘Service Mode’ press the rewind button on the Remote Commander twice.
TT will then appear in the bottom right hand corner of the TV.

POWER SUPPLY CIRCUIT 
CLICK ON THE IMAGE TO ZOOM IN 


SONY SERVICE TIPS
SONY KV32TW77
No high voltage
Sony AA-1 chassis. Unit no high voltage or sound. RY602 latched at turn on.
SOLUTION
Inspected the Power oscillator and discovered that it was running and producing 167 volts DC at the input side of RY602, but a <13 volts on the low side. Jumping RY602 restored High voltage. Unit had a bad RY602 relay in the power supply.

SONY KV32XBR37
NO RASTER
KV32XBR37 serial 80139945. Unit has no raster. Has sound, CRT filaments, and high voltage. Led in front is flashing.
SOLUTION
May have a IK failure. When bringing up the G2 the raster will appear with full vertical sweep and a purple screen. Not much green. Tech needs to look at the IK buffer collectors on Q771, Q772, & Q773. Normally with beam current there shall be about 1 volt on each collector. With the CRT Socket removed all collectors must drop to "0" volts. Q771 did not. It was 1.2 volts regardless if the tube was connected or not. Tech needs to short Q771(E&B) and see if the collector will drop. It did not. TV will need a replacement Q771. Replacement cured the symptom.