Read Sharp 28HW-53 (serv.man17) Technical Bulletin online
CTV2003 06 01
Month of Issue:
June 2003
Classification:
White
TELEVISION TECHNICAL BULLETIN
Page 2 of 2
Sharp Electronics (UK) Limited
Reference AVW 06062003 - 1
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
Reference
Function
Part Number
Comment
C528
Reservoir capacitor
VCEAGA1JW106M
Leaky
D502/3/4
Clamping diodes
RH-DX0551BMZZ
Intermittently faulty
D516
Clamping diode
RH-EX0837BMZZ
Intermittently faulty
D603
East/west modulator diode
RH-DX0299BMZZ
Open or short circuit
D604
East/west modulator diode
RH-DX0302BMZZ
Open or short circuit
IC1003
NVM
RH0IX1603BMZZ
Corrupted - reprogram
IC801
VDP 3120C2
RH-IX1688BMN2
No output
IC801
VDP 3130Y
RH-IX1858BMZZ
No output
L603
Feed coil
RCLIP0286BMZZ
Low resistance – normally 8
Ω
L604
Line earth return coil
RCLIP0284BMZZ
Low resistance
Q506
Eat/west output transistor
RH-TX0151BMZZ
Open or leaky – SMD
R519
Ramp charging resistor
VRD-RA2HD104J
Goes high or open – on component side of PWB
NB: L603 and L604 fitted to the 66GF63H are different to those shown in the list above. L603 -
RCILP0262BMZZ and L602 - RCILP0294BMZZ.
RCILP0262BMZZ and L602 - RCILP0294BMZZ.
Notes
•
The component list above shows the various component part numbers for parts mentioned in this Technical Bulletin
- it is not a list of components to change for east/west or geometry problems.
•
IC801 can either be a 3120 or 3130 - please check before replacement.
•
D516 is not shown on the GF circuit diagram, although it is fitted to the chassis.
•
R519 is sometimes a 150k
Ω
resistor, check the value before replacing, as fitting the incorrect value will result in
poor east/west geometry performance.
Display
