5
Service modes, error codes and protections
27
Figure 5-16
Deflection and Sync.
Fault Finding Tree
(F);
+12V
OK?
Check/replace
(F);
R3372
(A2);
D6460,
Fuse 1460
(F);
+200A
OK?
Check/replace
(F);
R3373
(A2);
D6441, R3443
(K6);
+8VS,+8VR
(K1);
+8VA,+8VB
OK?
Check/replace
(K6);
R3300
(K1);
R3538
(A1);
IC7213
D6223, Fuse 1201
(K5);
+3V3M1,
+3V3M2
+3V3,+3A,+3D
+5VA,+5M,+5V2-FB
+5P OK?
Check/replace
(K5);
IC7613
(A1);
IC7212
(K5);
X1601
12MHz
OK?
Check/replace
(K5);
X1601, IC7609
(K6);
X1305
12MHz
OK?
Check/replace
(K6);
X1305, IC7300
(K1);
X1525, X1526,
X1527, X1528
OK?
Check/replace
(K1);
X1525-
X1528
IC7501
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Yes
No
No
No
No
No
No
Check of the
Supply and X-tal
section
Horizontal
drive section
(K1);
<S2>
OK?
(K1);
replace IC7501
(K5);
HA available at
IC7609 , pin 28 ?
Check tracks from
(K1);
IC7501 to
(K5);
IC7609 .
(K
6)
; <F5k> OK ?
HA on
(K5)
and
<F5k> on (
K6)
must
be synchronized
(K5);
IC7609
defective
If not then
(K5);
IC7609
is defective
Yes
Yes
Yes
No
No
No
No
(K6);
<S7> OK?
Check/replace
(K6);
IC7300
Check/replace
(A2);
<L1>,<L2>,<L3>,<L4>,
TS7408,TS7409,
TS7411,TS7421
T5430
(If too difficult:
line repair kit
4822 310 11236)
Vertical
drive section
(K1);
<S1>
OK?
(K1);
IC7501 HIP
defective
(K5)
; VA available at
IC7609 , pin 29 ?
Check tracks from
(K1);
IC7501 to
(K5);
IC7609 .
(K6)
; <F4k> OK ?
VA on
(K5)
and
<F4k> on
(K6)
must
be synchronized
(K5);
IC7609
defective
If not then
(K5);
IC7609
is defective
Yes
Yes
Yes
No
No
No
No
(K6);
<S5>,<S6>,<S8>
OK?
Check/replace
(K6);
IC7300
No
Yes
Yes
No
Check/replace
(A3);
+13V-LOT
-15V-LOT
<F1>,<F2>,<F3>
D6614,C2615
D6617,D6618
IC7600
Yes
Yes
EW
drive section
Check/replace
(A2);
TS7480, D6479
C2480, C2482,
R3483, R3484
MG21FFT6gb.VSD
