Sony KDL-40SL140 Training Manual page 35

1) All Red Blink patterns will occur on the Front
Panel Red "Timer/PIC OFF" LED
2) All voltage are measured prior to unit shutdown
3) Confirm all connections between circuit boards
before replacing
Check
Balancer Feedback (FB)
CN6701/pins 2 & 3
*Before Shutdown
Is
FB Present
Before
Reference FB
Shutdown
Waveform
?
Diagram
Check
Individual Balancer HV Outputs
*Before Shutdown
Are
Select outputs
missing?
Reference HV
Outputs Test Point
Diagram
Are
Select outputs
Excessive
?
■
Replace
BM5-Board
CTV-51
NOTES:
No
Yes
▲
Replace
Yes
LCD Panel
Assembly
No
Yes
No
C3
Unit Shuts OFF
RED LED
Blinking
6X Blink Pattern
Backlight
Is
No
Backlight ON
Before Shut
Down?
Yes
Is a
Relay Click
Yes
Heard Before
Shut Down
?
No
Check
12V for OVP
*Before Shutdown
Is
voltage
Yes
No (>12V)
= or <12V Before
Shutdown
?
■
Replace Replace
BM5-Board IP5Z-Board
Triage Charts & Troubleshooting Flowcharts
KDL-40, 46SL140 Protection Mode
Troubleshooting Flowchart C 3
Primary – Mostly Defect
▲
Secondary – Possible Defect
■
Last Resort – Improbable Defect
Reference Figures 3-1, 3-2, & 3-3
for Test Point Locations
Check
Inverter HV1 & HV2 Outputs
CN6700
*Before Shutdown
Is
HV Present
Before
Shutdown
?
No
Check Backlight-ON
signak at
CN6154/pin 2
*Before Shutdown
Is
voltage
3.2V Before
Shutdown
?
Yes
Check LD signak at
CN6701/pin 6
*Before Shutdown
Is
voltage
11V Before
Shutdown
?
No
Replace
IP5Z-Board
IP5Z-Board
▲
Replace
Yes
Balancer-Board
■
No
Replace
BM5-Board
▲
Yes
Replace
Balancer-Board
34