Sony KF-WE50A1 / KF-WS60A1 Service Manual ▷ View online
– 5 –
KF-WE50A1/WS60A1
RM-1022
RM-1022
1.
Summary of Self-Diagnosis Function
•
This device has a self-diagnosis function.
•
In case of failure, the POWER/STANDBY or LAMP LED blinks or lights to assist service.
It is possible to specify the cause of the failure by the number of blink or the LED itself.
The following list shows the interpretation of those LED related information.
•
For the failure hard to be reproduced, its record is stored at the internal NVM.
The record can be displayed with the remote commander to specify the cause of the failure.
2.
Diagnosis and probable cause of Failure
•
In case of failure, the POWER/STANDBY or LAMP LED blinks or lights to indicate the following diagnosis.
If two or more failures occurred at one time, the one occurred first will be indicated.
If they occurred simultaneously, the one corresponds to the fewer times of blink will be indicated.
•
All the failure records listed below can be displayed on the screen.
“ 0 ” will be displayed when there is no failure record.
SECTION 1
SELF DIAGNOSIS FUNCTION
Diagnosis
Number of blink of
Probable Cause
Problem
STANDBY or LAMP
LED
Lamp cover error
3 times
- Lamp cover is not
- No picture/No sound
fastened securely.
- Fan 1-4 Power is no
supplied. (G2 board)
Fan error
4 times
- Fan connector is not seated
- No picture/No sound
securely.
- Fan caught wires or
harnesses.
- Internal temperature is too
high.
Temp error
4 times
- IIC-E line
- No picture/No sound
connector (WE: H3 board,
WF/XS : H4) is not seated
properly.
Lamp driver error
5 times
- Lamp driver defect
- No picture/No sound
Low B error
6 times
- No “DD 6V” output (G1)
- No picture/No sound
- ”PROT” is high (F)
-Short-circuit of Audio
power supply line (KD, G1)
- Blowout of a fuse
Audio error
7 times
(F4702, F4703, F4704 on KD)
- No picture/No sound
- IC failure
(IC4703, IC4708, IC4710 on
D-OVP error
8 times
- Overvoltage of +3.3V or
- No picture/No sound
+2.5V (A, B board)
Lamp error
LAMP-LED is ON.
- Lamp is dead
- No picture/No sound
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KF-WE50A1/WS60A1
RM-1022
RM-1022
3.
Blinking Sequence of POWER/STANDBY LED
4.
Self-diagnosis screen display
•
For the failure which is hard to reproduce, or accompany occasional power off and/or picture mute, the Self-diagnosis screen
display is useful to specify the cause.
<To show the screen display>
•
Press the keys of the remote commander in rapid sequence as follows, when the set is in standby mode.
• One time blink is not used for self-diagnosis.
• Example
Diagnosis Times of LED blink
Lamp OFF :
3.0 sec
Lamp ON : 0.3 sec
Lamp cover 3 times
Fan
4 times
Lamp OFF : 0.3 sec
• Release of POWER/STANDBY LED blinking
The Self-Diagnosis function is released by unplugging the AC
cord temporarily.
DISPLAY
t Channel 5
t
Vol -
t POWER
J
Please note that this differs from
that of entering the service mode (Vol +).
- Numeral "1" means a fault was detected one time or more.
- Numeral "0" means that no fault was detected.
- Numeral "0" means that no fault was detected.
MA
LCD ENGINE
I
MENU operation keys
N
SELF DIagnosis
MAIN
LCD engine
6
: LOWB
0
9
: AUDIO
1
101: WDT
0
SELF DIagnosis
LCD engine
MAIN
1
: LAMP
0
3
: LAMP COVER 0
4
: FAN
0
5
: LAMP DRIVER 0
201: WDT-ENGINE 0
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KF-WE50A1/WS60A1
RM-1022
RM-1022
5.
Self-Diagnosis function operation
•
3 :
Lamp cover
The rib at the back of the lamp cover closes the SW on T board to ground pin 3 of
CN8001.It’s monitored by the DE-micro (Pin 94 of IC6902) and turns off the lamp when
it’s open.
•
4 :
Fan
Fan rotation is detected by “FAN-PROT”and the DE-micro (Pin 92 of IC6902) turns off the
lamp when it’s “high”.
•
4 :
Temp
When the temperature sensor on the H3 board (WE) or H4 board (WF/XS) detects high
temperature or IIC-E line connector (CN6022:G2 board, CN44: H3/H4 board)is not sested
securely, DE-micro turns off the lamp.
•
5 :
Lamp driver
When the “LAMP-PROT” (pin 95) is low, lamp is not turned on.
If the “LAMP-HV-DET” (pin 96) is low at the same time, it is classified as no high voltage
of the lamp driver.
•
6 :
Low B error
When no “DD 6V” is detected, pin 129 of TV-micro is low and it turns off the main power.
•
8 :
D-OVP
When overvoltage of “+3.3V” or “+2.5V” is detected, pin 126 of TV-micro is low and it
turns off the main power.
•
9 :
Audio
When DC voltage is detected at the speaker or woofer outputs, pin 128 of TV-micro is low
and it turns off the main power.
•
LAMP :
Lamp
When the “LAMP-PROT” (pin 95) is low, lamp is not turned on.
If the “LAMP-HV-DET” (pin 96) is high at the same time, it is classified as no lamp or dead
lamp.
•
The failure record is not automatically cleared.
So after repair, be sure to check the record and set it to “0” manually.
< To clear the failure record >
If the screen display is already on, the following step 1 and 2 can be skipped.
1.
Power off (Set to the standby mode)
2.
DISPLAY
t
Channel 5
t
Vol -
t POWER
3.
Channel 8
t
ENTER
< To clear the Self-diagnosis screen display >
•
The self-diagnosis screen display is cleared by turning off the set with a remote commander or the power switch.
– 8 –
KF-WE50A1/WS60A1
RM-1022
RM-1022
Display Engine u-com
IC6902
T board
B
KD board
92
FAN PROT
94
LAMP-COVER
95
LAMP-PROT
96
LAMP-HV-DET
IIC-WE
IIC-E
2
5
8
8
11
14
13
14
A8
23
23
A14
C26
B14
4:Fan
FAN1-PRT
Fan1
Fan2
Fan3
Fan4
FAN2-PRT
FAN3-PRT
FAN4-PRT
CN6000
CN6022
CN6019
CN6029
CN6020
CN6029
7:Audio
4:Temp
8:D-OVP
6:LowB
error
Audio
amp
S8001
3:Lamp cover
5:Lamp
driver
IIC-WE
IC3801 WE u-com
IC3604 TV u-com
IIC-TV
IIC-TV
SP_DC_PROT
D_OVP
LB_ERROR
SW
Lamp driver
HV-DET
Lamp
128
126
129
H3 (WE50M1)/
H4 (WS60M1) board
H4 (WS60M1) board
G2 board
Temp
sensor
IC41
A board
+3.3V
+2.5V
+2.5V
G1 board
DD6V
< Self-Diagnosis block diagram>
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