Page 1
CATEGORY: Bb
Technical Report
SUBJECT:
IMPROVE DEGAUSSING CIRCUIT
R E F:
PAGE:
DATE:
SP024401Y
4
1 /
29 / Nov / 2002
IRISH Symptom Code: ---- IRIS Section: ----
GENERAL
MODELS
&
SERIAL No.
INTER-
CHANGE-
ABILITY
SERVICING When any of these TV sets is called for Service, it is requested to ensure that the final modification
for the above subject is applied.
In some TV sets it may appear a magnetized picture tube due to an unproper working of the
Degaussing Circuit (see Figure1 and Figure 2).
MODEL SERIAL No. MODEL SERIAL No. MODEL SERIAL No.
28JF76ESE
800001~
800200
32JF76ESE
800001~
800300
32JW76ESE
800001~
800335
ABCD
INTERCHANGEABLE From OLD to NEW From NEW to OLD NOT INTERCHANGEABLE
It is possible to find TV sets in three conditions:
PARTS
Table 1
1- With all modification applied:
Check C905 and R901. In case that in C905 position there is a capacitor assembled and in R901
a 22 Kohm resistor, is not necessary to take any action. The modification has been previously
applied.
2- Without any modification:
Check C905 and R901. In case that in C905 position there is a capacitor assembled and in
R901 a 100 Kohm resistor, apply modification shown in Table 1.
3- With part of the modification:
Check C905. In case there is a resistor assembled, apply modification shown in Table 2.
REF No.
R901
D902 --------------- RH-EX0554BMZZ -------------- B OCT. 02 --- ---
C903
C904
R909
NEW PARTS
DESCRIPTION
RES 0603 22K
1/10W SMD
ELEC C. 0.47µ
20% 50V
R 2125 1.5K
5%1/10W SMD
RES 100 OHM 5%
1/8W
OLD PARTS
NUMBER
VRS-CY1JF104J VRS-CY1JF223J B OCT. 02 AA AA
VCEA0A1EW476M VCEA0A1HW474M B OCT. 02 AA AA
VCKYTV1CF105Z VRS-TV1JD152J B OCT. 02 AA AA
------------ VRD-R A2BE101J B OCT. 02 AA AA
NEW PARTS
NUMBER
INTER-
CHANGEAB.
EFFEC-
TIVE
FROM
EX
CO-
DE
SN
CO-
DE
RA909 VINYL TUBE 46mm ------------ VT-UL0020T046 B OCT. 02 -- --
SHARP ELECTRONICA ESPAÑA, S.A. Engineering Dept.
C:\...\FORMATS\LAB_TR-A-B (rev 0)
Page 2
CATEGORY: Bb
0
D
K
7
Technical Report
SUBJECT:
IMPROVE DEGAUSSING CIRCUIT
IRISH Symptom Code: ---- IRIS Section: ----
Table 2
REF No.
R 90 8 ------------ VRS-C Y 1 JF 000J
C905 VRS-CY1JF103J VCKYTV1CF474Z B OCT. 02 AA AB
C903
C902
C904
C906
*
R909
R A90 9 V IN Y L T U B E 46 m m ------------ VT-U L0020T046 B OC T. 02 -- --
NEW PARTS
DESCRIPTION
ELEC C. 0.47µ
20% 50V
ELEC C. 22µ
20% 50V
R 2125 1.5K
5%1/10W SM D
------------ V C K YTV 1EF334Z ------------ B O C T. 02 -- --
RES 100 OHM 5%
1/8W
OLD PARTS
NUMBER
NEW PARTS
NUMBER
------------
VCEA0A1HW 105M VCEA0A1HW 474M B OCT. 02 AA AA
VCEA0A1EW 476M VCEA0A1HW 226M B OCT. 02 AA AA
VCKYTV1CF105Z VRS-TV1JD152J B OCT. 02 AA AA
------------ VRD-RA2 B E101J B OC T. 02 AA AA
R E F:
PAGE:
DATE:
IN TER-
CHANGEAB.
SP024401Y
2 /
4
29 / Nov / 2002
EFFEC-
TIVE
FROM
B O C T. 02 -- --
EX
CO-
DE
SN
CO-
DE
* This is a copper side component. See Figure 3.
Figure 1: TV set in Blue Back Mode Figure 2: TV set with Colour Bar Signal
D
C904
R752
K
R753
R748
Q704
R701
D714
K
HOT
C738
+
C748
R758
+
R790
D711
R757
D710
F7
JF902
R756
C901
Q902
R901
C902
JF901
+
2
1
Q901
R902
R904
R903
C905
R905
D901
K
R906
R907
+
R908KD902
C903
Abolish C906
Figure 3: C906 copper side position
SHARP ELECTRONICA ESPAÑA, S.A. Engineering Dept.
C:\...\FORMATS\LAB_TR-A-B (rev 0)
Page 3
CATEGORY: Bb
Technical Report
SUBJECT:
IMPROVE DEGAUSSING CIRCUIT
R E F:
PAGE:
DATE:
IRISH Symptom Code: ---- IRIS Section: ----
Figure 4: R909 assembly. Mother Unit PWB copper side (F7351N1A/N2)
00V
R726
724
R711
Q703
D725
C718
G
J196
(G)
K
D715
C713
D708
K
D
K
R728
21
R706
R709
R784
C712
+
R710
R719
D729
S
R729
D718
C704
R708
C756
C711
Q707
G
C702
T1 T2
C714
C753
C754
J33
R751
R705
J32
Q712
K
D737
POR701
R785
R789
J41
D716
C716
R786
D752
Q705
R754
R781
R788
IC701
K
R703
R727
R750
IC709
Q721
Q720
+
D707
D741
K
R748
R701
HOT
C748
C738
+
R752
K
64
C904
R753
Q704
D714
+
R758
31
(M)
F701
R790
3mm
D711
R757
D710
JF902
R756
C901
Q902
R901
C902
JF901
+
R902
Q901
R905
C903
R712
+
R783
J34
R773
R782
R715
C755
R716
J47
R718
SP024401Y
3 /
4
29 / Nov / 2002
3
2
1
R904
R903
C905
D901
K
R906
R907
+
Glue Point
(Thermofusible glue)
Soldering Point
SAFETY
Maintain
minimum lenght
of 3mm
Glue Point
R908KD902
(Thermofusible glue)
+
Vinyl Tube
FB603
R653
R909 Resistor Inside Vinyl Tube
Soldering Point
Note: The Glue Points must cover completely the vinyl tube end and soldering points.
SHARP ELECTRONICA ESPAÑA, S.A. Engineering Dept.
C:\...\FORMATS\LAB_TR-A-B (rev 0)
Page 4
CATEGORY: Bb
7
W
0
Technical Report
SUBJECT:
IMPROVE DEGAUSSING CIRCUIT
R E F:
PAGE:
DATE:
IRISH Symptom Code: ---- IRIS Section: ----
(G)
Q707
BT134W
SX0003BM
PLGN0207
R755
100
(1/2W)
XZ0224BM
D702
GPP20J
DX0641BM
C746
330nF
(275V)
FZ0188BM
C714
680
D701
GPP20J
DX0641BM
IC709
TLP165J
FX0111
D703
GPP20J
DX0641BM
Q901
TX0232
D704
GPP20J
DX0641BM
R730
4K7
(15W)
C904
1K5
C704
10nF
250V
KZ0029CE
C905
470nF
R756
1K8
R902
33K
C706
680nF
(400V)
R901
22K
Q902
TX0232
R9031KD901
R904
27K
R706
390K
(TQ)
R708
390K
(TQ)
R712
390K
(TQ)
R705
8K2
R714
0.56
(3W)
DX0551
R905
22K
R906
2M2
JF902
D903
EX0421BM
C903
0.47uF
(50V)
R783
220K
C712
1uF
(160V)
(AA)
GN0360
C701
470nF
(275V)
FZ0219BM
L701
F0108BM
C702
10nF
(250V)
KZ0029CE
VR701
VX0035BM
KZ0029CE
POR701
P0001BM
C703
10nF
250V
SP024401Y
4
4 /
29 / Nov / 2002
.
C748
220uF
(25V)
C902
22uF
(25V)
R909
100
XZ0123BM
R907
100K
D711
DX0045
R758
82R
(1/3W)
R797
1R5
(1/2W)
XZ0202
+16V
+12V
.
.
+5V
R
1
(2
.
T702
Z0586BM
37 38
EZA036WJ
6
4
1
3
D712
BYV28-600
DX0618BM
C713
68uF
(450V)
D741
C4V3
EX0543BM
R703
2K7
R713
10K
D715
C707
DX0551
100uF
Q720
BC847B
TX0232
(25V)
FB703
Q701
2SK2543
TX0245BM
LN0091GE
C798
220pF
(2KV)
KZ0035CE
R711
10
R750
22K
36
R799
1
(1/2W)
XZ0200BM
R790
270
(1/2W)
R753
2K2
Q704
BC857B
TX0243
R701
22K
R752
10K
D714
C6V8
EX0548BM
Q705
R754
BC847B
10K
TX0232
R748
220K
R789
100K
D707
DX0551
C756
100nF
R785
R782
47K
100K
-VS
C754
100nF
5 4
Q712
BC857B
TX0243
R773
1K
R715
18K
R751
(1%)
100K
321
R788
R784
22K
18K
IC701
+VS
876
BA10393
IX1556
R786
1K8
D716
B6V2
EX0584BM
C755
1nF
Q721
BC857B
TX0243
R709
R710
R716
330K
330K
390K
(TQ)
(TQ)
(TQ)
(1%)
(1%)
Figure 5: Degaussing Circuit Schematic Diagram.
SHARP ELECTRONICA ESPAÑA, S.A. Engineering Dept.
C:\...\FORMATS\LAB_TR-A-B (rev 0)
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