Sony KLV-40ZX1M Training Manual page 28

NOTES:
1) All Red Blink patterns will occur on the
Front Panel Red Power-LED
2) All voltage are measured prior to unit
shutdown
3) Confirm all connections between circuit
boards before replacing
CTV-54
KLV-40ZX1M Protection Mode
Troubleshooting Flowchart C 2
C2
Primary – Mostly Defect
▲
Secondary – Possible Defect
■
Last Resort – Improbable Defect
Unit Shuts OFF
RED Power-LED
Blinking
6X Blink Pattern
(Backlight Error )
Is
Backlight ON No
Before Shut-off
?
Yes
Check
LED Drive Outputs
LD1-Board
CN6781, CN6782,
CN6783, CN6784
Are
▲
No
All levels Replace
70V to 85V LD1- Board
?
Yes
Replace
LCD Panel
Check voltage at
CN6720/pin 1 LD1-Board
*Before Shut-off
Is
voltage No Replace
390V GS1-Board
?
Yes
Check voltage at
CN6721/pin 3 LD1-Board
*Before Shut-off
Is
No
voltage Replace
18V GS1-Board
?
Yes
Check Backlight-ON at
CN6780/pin 2 LD1-Board
*Before Shut-off
Is
▲
No
voltage Replace
3V B-Board
?
Yes
Replace
LD1- Board
FLOWCHART C2: PORTECTION MODE
Troubleshooting Flowcharts
FIGURE 3-5
27