6 Fault finding trees, diagrams and overviews17L9.1E
and overviews
6Fault finding trees, diagrams
STARTRemark :
In normal operation the
Connect a pattern generator to the arial input.
Red LED lights in half
Set Patt.gen. to 475,25 MHz, colourbar, stereosound,
intensity and in
PAL B/G (for France SECAM l).
standby-mode the LED
Put the Mainsswitch : on.
lights in full intensity
In normal conditions the set will start with the Red LED
blinking for one second in full intensity, one time then
after a few seconds more in half intensity while the
picture and sound will appear.
1 1 1 1
Does the red LEDDoes the red LEDCheck/Replace
Is the Power supplyAny secondary
blink for one second inNolight in full intensityNoNoNo(A1); <P1>No(A1);SW0231,F1500,D6505
hicking ?voltage present ?
full intensity, one timecontinuouslypresent?Note: If F1500 is defective, then also check R3503
??
Yes
YesYes
Yes
1 7 1 31 1 1 1
Check
1 1 1 D(A1); <P2>(A1);<P3>
(A7); <C1>,<C4(reset)>
Check/Replace
NoNo
3V3,startpulsVoltage
Do picture and soundNoAThe load of the power supply(A1);D6540,C2540,D6510,
Yespresent?present?Check/Replace
appear properlyis too high.R3510,R3529
?Isolate each branch of the loadTS7603,TS7604
IC7600
one by one, until the hickingYes
Yesdisappear.X16601 1 1 A
Continue with the fault finding(A8);LED6690Yes
for the branch, which causesCheck/Replace
Ensure communication
the overload.(A1);IC7520
The branches are:1 1 1 1R3525with the RC,
Check/Replace
(A1);AudioSupply
(A8);IC7680Check/Replace(A1); voltage on
+VBATTNo
Put the set into the(A1);TS7518,L5552TR5545 pin9
MainSupply
Service Default Modepresent ?
Vaux
either via the DST or by
pressing the buttons on
Yes
the RC in the following
order :062596<MENU>,
1 1 1 A
or via the service pins
Check/Replace
An error code is(A1);L5540,D6540,C2540
indicated by the blinkingVaux,F1572,L5573,D6560
LED via the SDM.IC7581
n-times blinking meansNote 1:
error n.
See also chapter 5.5 forIRIS SYMPTOM CODE
detailled information
1 1 1 A
11 1A
Set is OK
Check / correct Options
Is there an error
list via CSM seeNo
indication ?ConditionMain symptomExtended symptom
chapter 5.5 of this
codecodecode
manualfor details
Yes
BNote 2:
(A1) means Drawing A1
<P1> means Test point P1
CL 86532104_034.eps
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