Sony KDS-50A2000 Training Manual page 50

1) Except for the Lamp LED all flash patterns will
occur on the Front Panel
Red "Power" LED
2) All voltage are measured prior to unit shutdown
3) Reference Chapter 5, Pages 61 - 63 for detailed
flowchart step descriptions
Lamp
Driver Block
Reference Figure 3-4
for Test Point
Locations
Lamp
Driver Block
PROTECTION MODE
FLOWCHART C3
FIGURE 5-7
TVP-23
NOTES:
5X Flash
Pattern
(Lamp Driver)
Does
Yes 3 Attempts
Spark Gap
20 Sec. Intervals
Light?
No
Replace LAMP
Check
Supply Voltage
Lamp Part Number
At
KDS-50A2000 – XL-5200
X1 Connector
KDS-55A2000 – XL-5200
*Before Shutdown*
KDS-60A2000 – XL-5200
Replace
Is Voltage
No
G-Board
380V
Present? A-1186-654-A
Yes
Check
Lamp-ON Voltage
JS1/pin 4
*Before Shutdown*
Replace
Does
A1-Board
voltage go low
No
A-1205-146-A (50")
2.2V to
A-1205-145-A (55")
1V?
A-1205-144-A (60")
Yes
Replace
Lamp
Driver Block
1-474-012-11
2006 SXRD-A Protection Mode
C3
Troubleshooting Flowchart C 3
Unit Shuts OFF
RED LED
Flashing
Reference
Figure 2-5
Check "AC-Relay"
G-Board Voltage at C6400
*Before Shutdown*
Is voltage
Yes
0.6V
Present?
Replace
G-Board
No
A-1186-654-A
Replace
A1-Board
A-1205-146-A (50")
A-1205-145-A (55")
A-1205-144-A (60")
5. Protection Circuits
NOTE: Confirm all
connections between
circuit boards before
6X Flash
replacing
Pattern
(Low B+)
Is
0, 1, or 2
0 1
Relay clicks
Heard before
Shutdown
?
Reference
2
Figure 2-5
Check Voltage at
C6936 G-Board
*Before Shutdown*
Is voltage Replace
No
11V G-Board
Present? A-1186-654-A
Yes
Is voltage
Yes
>12V
Present?
Reference
No
Figure 2-5
Check Voltage at
PH6401/pin 4
G-Board
*Before Shutdown*
Is voltage
No
Yes
5V
Present?
46