Sony KD-55X9000C Service Manual ▷ View online
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.
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.
8. For safety reasons, repairing the Power board and/or Inverter board is prohibited.
7
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).
L k
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).
L k
b
d b
f h
h d
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
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
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).
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
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
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
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).
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).
8
SELF DIAGNOSIS FUNCTION
The units in this manual contain a self-diagnostic function. If an error occurs, the Smart Core Red 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 Smart Core Red 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
The number of times the LED flashes translates to a probable source of the problem.
A definition of the Smart Core Red 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
DIAGNOSTIC TEST INDICATORS
When an error occurs, the Smart Core Red 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.
When an error occurs, the Smart Core Red 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.
problems occur.
Result for all of the following diagnostic items are displayed on screen.
If the screen displays a “0”, no error has occurred .
If the screen displays a “0”, no error has occurred .
RED LED blinking count
Detection Items
2x
<G/B> Main 12V over voltage [MAIN_POWER]
<G>: Power supply board, <B>: Main board, <T>: Tcon board, (LD) board ,
<P>: Panel module , <S>: Speaker , <A>: Power Adapter
3x
<B> Main 5.0V failure [DC_ALERT]
<B/S> Audio amp. protection [AUD_ERR]
<B> Tuner or demodulator I2C No ACK [TU_DEMOD]
[Note.1]
[Note.1]
<B> HDMI Switch/Equalizer I2C communication error [HDMI_EQ]
[Note.2]
[Note.2]
Note.1
Note.1//Note.2
Note.2
: Both functions were disabled but remains on the Self diagnosis screen like in the next page.
Note.2
Note.2
: There are some sets which still enable this HDMI error detection function.
Among these, software version updated or installed to PKG2161 or higher have this function disabled.
4x
<LD/P> LED driver failure/LED voltage protection [LD_ERR]
<LD/P>
<LD/P>
Error detection of the I2C communication between the Main device and the LD IC.[BCM_ERR]
P/T/G/B
P
l ID EEPROM I2C N ACK (Al
l
f il
i
t)
[P ID ERR]
5x
<P/T/G/B>
Panel ID EEPROM I2C No ACK (Also panel power failure is a suspect)
[P_ID_ERR]
<T> TCon IC I2C communication error [TCON_ERR]
6x
<G/P/B> Backlight failure [BACKLIGHT]
Over temperature protection [TEMP_ERR]
7x
p
p
[
]
<B> Temp. sensor I2C No ACK [TEMP_ERR]
<B> V By One lock error between Main device and 4KBE device [4KBE_ERR]
8x
<B> Software error [SW_ERR]
Red italic
: detect at startup sequence only.
9
SELF DIAGNOSIS FUNCTION
[SELF DIAGNOSTIC SCREEN DISPLAY]
SELF CHECK
Error item Naming
Error count
Format of error timestamps
YYMMDDhhmmss (in UTC)
Example:
<<
002 MAIN_POWER 000000000000 000000000000 000000000000 000
003 DC_ALERT 000000000000 000000000000 000000000000 000
003 AUD_ERR 150101000018 150101000018 150101000018 003
003 HDMI_EQ 150101000123 150101000045 150101000045 003
003
003 DC_ALERT 000000000000 000000000000 000000000000 000
003 AUD_ERR 150101000018 150101000018 150101000018 003
003 HDMI_EQ 150101000123 150101000045 150101000045 003
003
TU DEMOD
150101000218
150101000223
150101000105
003
Back
Example:
120823132523 -> Aug 23 2012 13:25:23 UTC
* Only when time is set, an error timestamp
is saved.
Both of HDMI_EQ/TU_DEMOD have been disabled.
(R f
h
i
f d
il )
003 TU_DEMOD 150101000218 150101000223 150101000105 003
004 LD_ERR 000000000000 000000000000 000000000000 000
004 BCM_ERR 000000000000 000000000000 000000000000 000
005 TCON_ERR 150101000504 000000000000 000000000000 001
005 P_ID_ERR 000000000000 000000000000 000000000000 000
006
004 LD_ERR 000000000000 000000000000 000000000000 000
004 BCM_ERR 000000000000 000000000000 000000000000 000
005 TCON_ERR 150101000504 000000000000 000000000000 001
005 P_ID_ERR 000000000000 000000000000 000000000000 000
006
BACKLIGHT ERR
000000000000
000000000000
000000000000
000
Smart Core Red LED
(Refer the previous page for details.)
006 BACKLIGHT ERR 000000000000 000000000000 000000000000 000
007 TEMP_ERR 150101000200 150101000002 000000000000 002
007 4KBE_ERR 000000000000 000000000000 000000000000 000
008 SW_ERR 000000000000 000000000000 000000000000 000
007 TEMP_ERR 150101000200 150101000002 000000000000 002
007 4KBE_ERR 000000000000 000000000000 000000000000 000
008 SW_ERR 000000000000 000000000000 000000000000 000
blinking count
00005 00414 00002
[Home]Exit
•
Panel Operation Time is recorded every
30 min, but Total Operation Time is recorded every 1 hr.
Therefore, the panel op. time might become larger than
the total op. time.
Error
timestamp for
last recorded
error
Error
timestamp for
second last
recorded error
Error
timestamp
for 3rd last
recorded
Total Operation Time [hr] – Boot Count – Panel Operation Time [hr]
error
p
[ ]
p
[ ]
10
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