and overviews
6
Fault finding trees, diagrams and overviews
START
Remark : In normal operation the Red LED lights in half intensity and in standby-mode the LED lights in full intensity
L9.1E
17
6
Fault finding trees, diagrams
Connect a pattern generator to the arial input. Set Patt.gen. to 475,25 MHz, colourbar, stereosound, PAL B/G (for France SECAM l). Put the Mainsswitch : on. 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.
1111 Does the red LED blink for one second in full intensity, one time ?
Yes Yes No
Does the red LED light in full intensity continuously ?
No
Is the Power supply hicking ?
No
Any secondary voltage present ?
No
(A1); <P1> present?
Yes
No
Check/Replace (A1); SW0231,F1500,D6505 Note: If F1500 is defective, then also check R3503
Yes
1713
111D Do picture and sound appear properly ?
Yes No
A
Yes
Ensure communication with the RC, Check/Replace (A8);IC7680 Put the set into the Service Default Mode either via the DST or by pressing the buttons on the RC in the following order :062596<MENU>, or via the service pins An error code is indicated by the blinking LED via the SDM. n-times blinking means error n. See also chapter 5.5 for detailled information
The load of the power supply is too high. Isolate each branch of the load one by one, until the hicking disappear. Continue with the fault finding for the branch, which causes the overload. The branches are: (A1); AudioSupply +VBATT MainSupply Vaux
Check (A7); <C1>,<C4(reset)> 3V3, Check/Replace TS7603,TS7604 IC7600 X1660 (A8);LED6690
1111 (A1); <P2> startpuls present?
No
(A1);<P3> Voltage present?
Yes
No
Check/Replace (A1); D6540,C2540,D6510, R3510,R3529
Yes
111A Check/Replace (A1); IC7520 R3525
1111 Check/Replace (A1); TS7518,L5552
No
(A1); voltage on TR5545 pin9 present ?
Yes
111A Check/Replace (A1); L5540,D6540,C2540 Vaux,F1572,L5573,D6560 IC7581 Note 1: IRIS SYMPTOM CODE 111A
Set is OK Check / correct Options list via CSM see chapter 5.5 of this manual for details
No
1 Is there an error indication ?
11
A
Condition code
Main symptom code
Extended symptom code
Yes
B
Note 2: (A1) means Drawing A1 <P1> means Test point P1
CL 86532104_034.eps 190299
