6 Fault finding trees, diagrams and overviews18L9.1E
A
Ensure communication
with the RC,
Check/ReplaceNo picture
(A8);IC7680(Colour missing)Picture OK
NO PictureDeflection not OK
Put the set into theNo MenuMenu OK
NO SoundPictures are not
Service Default ModeBlack screenNO Sound
Menu OKsymetrical and unstable
either via the DST or bySound OK(l,r,l+r)
pressing the buttons on
1 3 1 0
the RC in the following
order :062596<MENU>,Check / Replace1 2 1 0
or via the service pins(B);(A2);L5480,Conn.0220NICAM/2CS/BTSCCheck / ReplaceC
No(B);Conn.0244,R3341,Multimono(TDA9851)
NoHeater / Filaments(A5);Antenna,
OKR3342,CRT-Socket,(MSP3415D)VT_Supply,D6008,
An error code is
?L5342,CRT(A6);X1205..X1208
indicated by the blinking
LED via the SDM.1 5 1 0
n-times blinking meansYesCheck / Replace
(A5);<I2>,SIF(A5);<I4>
error n.1 3 1 0No(A5); IC7250-A,No1 1 1 A
OkOK
See also chapter 5.5 forTS7266
Adjust VG2??
detailled informationSound and PictureCheck / Replace
No
Check / Replacefrom external source
(B);VG2IC7250
No(A2);TR5445,YesYesOK ?
OK
(B);R3343,C23431 5 1 0
?
CRT
(A10);Yes
Is there an errorCheck / Replace(A9);<A2>,<A3>
<A10>..<A13>No1 2 1 0
indication(A10); IC7833<A6>,<A7> OK
YesOK
??
?Check / Replace
1 3 1 0No
Tuner1000
Yes
Check/ReplaceYes
Yes
(A3);<F3>,<F4>No(A3);IC7401,
If the mainsupply or
OKD6401.C2403,D6402
EHT is missing, then
1 5 1 01 5 1 0
?
the error message may(A12);
Check / ReplaceCheck / Replace
not be reliable. So in<A16>..<A18>
No(A11);TS7904..TS7910(A9);IC7821
this state check/replaceYesOK
(A12);IC7050..IC7053IC7822
the?
1 3 1 0
components of the
mainsupply and EHT inYes
the first place see
(A6);<V1..V4>Check/Replace1 5 1 0
schematics ;No
<V6,V7,V8>(A6);IC7250-B/CCheck / Replace
(A1), (A2) and
OK(A13);Conn.0234,
(A4);IC7250-D <S2>
Conn.0215
Speakers
Yes
1 3 1 0
B
Check/Replace
(B);<V11..V16>
No(B);Conn0245,IC7330,
OK
CRT Socket
Yes
1 3 1 0
Check/Replace
(B);CRT
CL 86532104_035.eps
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