76GF-64H (serv.man21). Horizontal stage faults - Sharp TV Technical Bulletin (repair manual). Page 2

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CTV2002 01 04
Month of Issue:  
May 2003
        
Classification: 
White
TELEVISION TECHNICAL BULLETIN
Page 2 of 2
Sharp Electronics (UK) Limited
Reference JR07012002-1
Revision  3
White – Carry out as required
Yellow – Carry out as required and whenever the unit comes in for service
 Red – Carry out on all units
Horizontal Drive Problems
Sometimes it will appear that there is no horizontal drive signal, even though the microprocessor has gone through the
boot sequence.  In this situation, it is possible to release the horizontal mute to enable the horizontal stage to start.
There are a number of ways that this can be achieved, one is to short out the base/emitter junction of Q607, and the
other is to temporarily isolate link JL2.  If this link is removed, it is vital that it is replaced after completing the repair as
failure to do so will result in premature failure of the line stage.
Location of Link Wire JL2
REF NO
DESCRIPTION
PART NUMBER
PRICE CODE
C528
Capacitor 10
µ
F 63V
VCEAGA1JW106M
AA
C607
Capacitor, 330
µ
F, 10V
VCEAGAIAW337M
AB
C613
Capacitor, 560nF 250V
RC-FZ6564BMNJ
AF
C615
Capacitor, 470
µ
F 25V
VCEAGA1EW477M
AB
C632
Capacitor, 470
µ
F 25V
VCEAGA1EW477M
AB
D1601
Zener Diode, BZX79C33V
RH-EX0427BMZZ
AA
IC705
IC, MOC8106SR2V-M
RH-IX0106BMZZ
AD
L603
Coil
RCILP0286BMZZ
AG
Q506
Transistor E/W
RH-TX0151BMZZ
AD
Q601
Transistor Line o/p
RH-TX0144BMZZ
AK
R610
Safety Resistor
RR-XZ0200BMZZ
AB
R613
Resistor, 3.3k
 3W
VRS-LU3LB332J
AB
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