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9
7 blinks
7 blinks
7 blinks
7 blinks
7 blinks
7 blinks
Except 6,7 blinks
Symptom
(just for reference)
5V from VFG (*3)
5V from VFG (*3)
5V from Vad (*3)
32.6V , 15.8V from Vad
(*3)
(*3)
148V from Vad (*3)
290V from GND (*1)
-195V from GND (*1)
209V from GND (*1)
Output voltage value
(*1)
(*1)
5V_F_A :
Short check with VFG
5V_F_A
: IC16724 (1 - 2 pin )
Short check with GND
Vset ( IC16788 or L16699, IC16789 ) ,
Vad ( IC16784 or L16697 )
5V_F_B :
Short check with VFG
Vad+5V :
Short check with Vad
32V_F , 16V_F :
Short check with Vad
Short check with Vad
Short check with GND
Basis of output voltage (*3)
5V_F_B
: IC16725 (1 - 2 pin )
IC16771 (1 - 2 pin ) /
or
IC16464 (3-5 pin) IC16465 (3-5 pin)
IC16773 (3-5 pin)
32V_F , 16V_F
: IC16791 ( 9 - 12 pin, 9 - 11 pin )
Vscn ( IC16786 or L16698, IC16787 )
< input from P board >
Vsus (C16412 - 16415) ,
15V ( IC16791 4,5 pin - GND )
Output voltage /
Check components ( Defective
components )
components )
First, check the short circuit of the power line. If it is not short circuited,
then check the output voltage with the unit just before shutdown.
then check the output voltage with the unit just before shutdown.
(*1) This value is different by each model.
So please check the accurate value
by the Service Manual.
by the Service Manual.
After
checking
checking
Vad (*2)
Step3. Short Circuit Check of Power Line and Check the Output Voltage
(*2) These voltages are related to Vad.
So if Vad is not constant,
these voltages are also not constant.
( refer to the next page )
(*3) Warning
The basis is not GND.
If you check by oscilloscope,
don’t plug in the ground pin (3
If you check by oscilloscope,
don’t plug in the ground pin (3
rd
pin)
of the oscilloscope.
Ground pin
(3
rd
pin)
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