Sony KDL-42R500A / KDL-47R500A Service Manual ▷ View online
KDL-42/47R500A(CH)
17
ADJUSTMENT
4) How to use the remote commander.
5) After entering service mode, then turn off the power switch.
Function
The flow of control
Service mode on
<Info><5><Vol Up><Power>
Service mode off
<Other> / <Power off + on>
Adjustment Item up / down
/
Data Value up / down
/
18
SEC 3. TROUBLE SHOOTING
No power
Check SB_3.3V
at 1 pin of CN201
on the Main board
Between 3.14~3.45V
Harness issue
Change
PSU
Replace the harness
between PSU and
Main board
Change
Main board
NG
OK
NG
Symptom
improvement
improvement
Long AC off(> 15 min.)
and then
Power On
Enter Service Mode and check
Self diagnosis history
NG
OK
Check the harness
PSU to M/B
connection
NG
OK
Fix the harness
connection
IF MAIN_POWER > 0 or
DC_ALERT1 > 0
IF AUDIO_PROT > 0
BACKLIGHT_ERR > 0
Change
Main board
Change
Panel
Change
Main board
OK
No
No
Yes
Yes
Yes
3-1. NO POWER
KDL-42/47R500A(CH)
KDL-42/47R500A(CH)
19
1) 2 times blinking (Main Power Error)
TROUBLE SHOOTING
3-2. STANDBY LED BLINK
Harness issue
Change
PSU
OK
Symptom
improvement
improvement
<2.6V
Change
Main board
Change
Main board
2-time blinking
Check REG+12V at
CN201_Pin-3/8 on
Main board
(11.8~13.2V)
Replace the harness
between PSU and
Main board
NG
NG
Check PSU_EN# at
CN201_Pin-6 on
Main board
>=2.6V
Check the harness
PSU to M/B
connection
NG
OK
Fix the harness
connection
OK
KDL-42/47R500A(CH)
20
TROUBLE SHOOTING
2) 3 times blinking (Main Board Error)
3-time blinking
Check PWM_5V at
L202 pin-2 on Main board
(4.75~5.25V)
U202, L202, etc
Change Main board
Change Speaker
Check SYS_3.3V
at U204_Pin-6
on Main Board
(3.135~3.465V)
Check the speaker
Impedance at the
SP Connector
(8ohm+/-15%)
U204, etc
Change Main board
Demo, Audio, Tuner, etc
Change Main board
DC_ALERT
NG
OK
NG
OK
AUDIO
NG
OK
Check the harness
M/B to Speaker
connection
NG
OK
Fix the harness
connection
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