SHARP 28JF76ESE Service Manual
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)
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)
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