Read Sharp 66GF-63 (serv.man3) Service Manual online
DA100 (50Hz) Chassis – Article for Television Magazine
Page 77 of 80
Sharp Electronics (UK) Limited - March 2003
Revision 2
IC301 / IC302 - Audio Amplifiers
Type:
Thomson
TDA7480
Sharp
Part
Number:
VHITDA7480/-1
Package: DIL
Price
Code:
AK
This IC is the same type for all FW models. To date, it has no alternative.
Pin Name
I/O Comment
DC
Voltage
1 -Ve
I Negative
supply -18.0V
2 -Ve
I Negative
supply -18.0V
3 -Ve
I Negative
supply -18.0V
4 Output
O PWM
output
0V
5
Boot Diode
I
Boost diode
-7.0V
6 Boot
I Boost
10.0V
7 NC
X Not
connected 0V
8 Feedback
C I Feedback
0V
9 Frequency
C I Freq
control
-15.0V
10 Ground
X Signal
ground
0V
11 Input
I Signal
input
0V
12 Mute
I <2.7V
mute
5.1V
13 NC
X Not
connected 0.5V
14 +Ve
I Positive
supply 17.2V
15 V
reg
I Reference
-7.0V
16 +Ve
I Positive
supply 17.2V
17 -Ve
I Negative
supply -18.0V
18 -Ve
I Negative
supply -18.0V
19 -Ve
I Negative
supply -18.0V
20 -Ve
I Negative
supply -18.0V
IC702 - Primary Control
Type:
Thomson/SGS ST6203B
Sharp Part Number: RH-IX1646BMZZ
Package:
SMD gull wing
Price Code:
AL
This IC is the same type for all FW models. To date, it has no alternative.
Note that the earth connection of the meter has to be taken at the negative end of the main smoothing
block. A more convenient connection is the chopper transistor heatsink.
Note that the earth connection of the meter has to be taken at the negative end of the main smoothing
block. A more convenient connection is the chopper transistor heatsink.
Pin Name I/O Comment DC
Voltage
1 VDD
I Supply
5.2V
2 OSCIN
I Oscillator
2.5V
3 OSCOUT
O Oscillator
2.5V
4 NMI
I Remote
input
5.0V
5 TEST
X Grounded
0V
6 RESET
I From
reset
5.2V
7 PB7
I From
processor 5.2V
8 PB6
I 100Hz
reference 0.48V
9 PB5
I/O
Key
scan
5.2V
10 PB3
I/O
Key
scan
0V
11 PB1
I/O
Key
scan
0V
12 PB0
I/O
Key
scan
0V
13 PA3
O To
processor
5.2V
14 PA2
O Degauss
0V
15 PA1
O Power
control
0V
16 VSS
X Ground
0V
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