Philips DFR9000 - Standby-LED Blinking State

10. Temperature & fan test
Purpose: This test measures the temperature inside the set
and switches the fan speed for both fans in
parallel.
Note: “FAN FAIL” indicates fan current out of range.
Standby-LED Blinking State
When the set is in standby mode and the Standby-LED is
blinking, the internal protection circuits have detected a
serious problem and the set won’t wake up anymore.
Errors are reported via the “ERR_FLAG” line, which can be
triggered from following circuitries:
• DC protection on UCD Amplifiers
(see UCD , components around transistor 7212)
→ Most likely, one of the UCD Amplifiers is defective and
must be replaced.
• Overvoltage protection for +5V and +12V on ASP Board
(see ASP Board , components around transistor 7604)
→ Most likely, Power Supply AC6750 is defective and
must be replaced.
6
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MAIN MENU
Temperature &
Fan Test
Set fan step and
display temp.
(see table 6)
RC
“DISPLAY”
pressed?
RC
“DISPLAY”
pressed?
RC “OK”
pressed?
N
Y
Y
N
Select next
fan step
(see table 6)
2-9
www.freeservicemanuals.info
13/10/2016
Published in Heiloo Holland