Sony KDS-R50XBR1 Training Manual page 20

NOTES:
1) Except for the Lamp LED all flash
patterns will occur on the Front
Panel
Red Power/Standby LED
2) All voltage are measured prior to
unit shutdown
3) Reference Chapter 4, Pages 43 -
52 for detailed flowchart step
descriptions
ASU-Board
Replace
The Fan(s)
connected to
the higher than
1V line (s).
TVP-21
C-2
Unit Shuts OFF
RED LED
Flashing
Fan Part Numbers
4X Flash
Fan #1 – 8-835-860-11
Pattern
Fan #2 – 8-835-859-11
Fan #3 – 8-835-859-11
(Fan Rotation )
Fan #4 – 1-787-333-11
Check rear fans (1 & 4 ) that are
visually accessible for rotation
No
Are fans rotating?
Yes
Check Fan Drive (DR)
and Feedback (FB)
Drive
Voltage Levels at
CN2301/pins 6 & 8 (DR)
CN2301/pins 5 & 7 (FB)
*Before Shutdown*
Feedback
Are (FB)
Yes
voltages higher
than 1V?
No
Replace
ASU/DSU Assembly
Go to Appendix for
Part # Tables A-1 & A-2
2005 SXRD Protection Mode
Troubleshooting Flowchart C -2
Check Fan Drive
Voltage Levels at
ASU-Board
CN2301/pins 2 & 11
*Befroe Shutdown*
Replaced
Are (DR)
Yes
Non-Rotating
voltages
6V?
Fan
No
Replace
ASU/DSU Assembly
Go to Appendix for
Part # Tables A-1 & A-2
5X Flash
Pattern
Lamp Driver
Does
Spark Gap
Light?
No
Check
Supply Voltage
Lamp Driver
At
Board
X1 Connector
*Before Shutdown*
Is Voltage
380V
Present?
Yes
Check
Lamp-ON Voltage
ASU-Board
CN2390/pin 4
*Before Shutdown*
Replace Does
Lamp Power voltage go low
Yes
Supply Block 3.3V to
1-468-936-12
0.13V?
Troubleshooting Flowcharts
NOTE: The Lamp Driver is
also referred to as the Lamp
Power Supply Block
3 Attempts
Yes
20 Sec. Intervals
Replace LAMP
Lamp Part Number
KDS-R50XBR1 – 9-308-760-0
KDS-R60XBR1 – 9-308-760-0
Replace
No
G-Board
A-1138-898-A
Replace
ASU/DSU Assembly
No
Go to Appendix for
Part # Tables A-1 & A-2
17