Read Sharp 76EF-20H (serv.man28) Technical Bulletin online
CTV2001 02 04
Month of Issue: February 2001
Classification:
White
TELEVISION TECHNICAL BULLETIN
Page 1 of 2
Sharp Electronics (UK) Limited
Reference GE93500X
Revision 1
White – Carry out as required
Yellow – Carry out as required and whenever the unit comes in for service
Red – Carry out on all units
MODELS
76EF20H
SYMPTOM CTV will not respond to any controls other than the Mains On/Off switch.
This only applies to serial numbers before 713010.
CAUSE
100Hz PWB reset pulse shape
ACTION
1
Modify the circuit at IC1001 pin 44 as indicated on Fig.1
2
Cut jumper wire J902 and fit additional components Q1901, R1901 and JL1901
as shown in Fig.2
as shown in Fig.2
3
Using the glue, fix the additional components to the PWB as shown in Fig.3.
REF NO
DESCRIPTION
PART NUMBER
PRICE CODE
Q1901
Transistor
RH-TX0142BMZZ
AB
R1901
RES 150Ohms 1/4W
VRD-RA2EE151J
AA
JL1901
Coloured jumper wire 50mm
VW7UGB0-050AA
AA
-
Poliamide adhesive
ZHOTM-05HR31E
BS
CTV2001 02 04
Month of Issue: February 2001
Classification:
White
TELEVISION TECHNICAL BULLETIN
Page 2 of 2
Sharp Electronics (UK) Limited
Reference GE93500X
Revision 1
White – Carry out as required
Yellow – Carry out as required and whenever the unit comes in for service
Red – Carry out on all units
JL1901
Q1901
+5v
Collector GND
Base
Emitter
J902
JL1901
Display
