Sharp 28HW-53 (serv.man2) Service Manual ▷ View online
DA100 (50Hz) and DA50W Chassis – Voltage Tables
Page 6 of 9
Sharp Electronics (UK) Limited - March 2003
Revision 1
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
DA100 (50Hz) and DA50W Chassis – Voltage Tables
Page 7 of 9
Sharp Electronics (UK) Limited - March 2003
Revision 1
IC501 - Vertical Output
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
-13.1V
2
-Ve
I
Negative supply
-13.1V
3
-Ve
I
Negative supply
-13.1V
4
Output
O
PWM output
0V
5
Boot Diode
I
Boost diode
-2.1V
6
Boot
I
Boost
9.9V
7
NC
X
Not connected
0V
8
Feedback C
I
Feedback
0V
9
Frequency C
I
Freq control
-11.8V
10
Ground
X
Signal ground
0V
11
Input
I
Signal input
0V
12
Mute
I
<2.7V mute
5.0V
13
NC
X
Not connected
0V
14
+Ve
I
Positive supply
14.1V
15
V reg
I
Reference
0V
16
+Ve
I
Positive supply
14.1V
17
-Ve
I
Negative supply
-13.1V
18
-Ve
I
Negative supply
-13.1V
19
-Ve
I
Negative supply
-13.1V
20
-Ve
I
Negative supply
-13.1V
IC1003 - NVM
Type:
Xicor X25645S8
Sharp Part Number: RH-IX1603BMZZ
Package:
SMD
Price Code:
AV
In the Dolby Pro Logic version of this chassis (models ending in 4) and the76GF63H, there is another NVM
fitted. This is IC1004 and it is used as a teletext page store. It is not necessary to change this IC if you
suspect a data corruption causing an operational problem on the set.
fitted. This is IC1004 and it is used as a teletext page store. It is not necessary to change this IC if you
suspect a data corruption causing an operational problem on the set.
Pin
Name
I/O
Comment
DC Voltage
1
NC
X
Earth
0V
2
S1
X
Earth
0V
3
S2
X
Earth
0V
4
VSS
X
Earth
0V
5
SDA
I/O
Date
4.2V
6
SCL
I
Clock
4.2V
7
WP
I
Write protect
5.0V
8
VCC
I
Supply
5.0V
DA100 (50Hz) and DA50W Chassis – Voltage Tables
Page 8 of 9
Sharp Electronics (UK) Limited - March 2003
Revision 1
IC2401 - Megatext
**FW53H
Type:
Type:
Siemens SDA5273-2
Sharp Part Number: RH-IX1673BMZZ
Package:
DIL
Price Code:
BE
**FW54H (Pro-Logic Models)
Type:
Type:
Siemens SDA5275-3
Sharp Part Number: RH-IX1709BMZZ
Package:
DIL
Price Code:
BG
Note that a different type of IC is used for the Dolby Pro-Logic version of this chassis. It also has a page
store (IC2402) associated with the Mega Text IC when used in the Pro-Logic set.
store (IC2402) associated with the Mega Text IC when used in the Pro-Logic set.
Pin
Name
I/O
Comment
DC Voltage
1
CLK
X
Not connected
1.1V
2
TSCQ
X
Not connected
2.0 to 2.3V
3
VS
I
Vertical pulse
0.V
4
HS
I
Horizontal pulse
0.1V
5
XOUT
O
Crystal
1.5V
6
XIN
I
Crystal
2.0V
7
GPO
X
Not connected
0V
8
TM
X
Grounded
0V
9
CVBS
I
Composite video
5.0V
10
VDD 1
I
Supply
5.0V
11
VDDA
I
Supply
5.0V
12
VSSA 1
X
Ground
0V
13
VDD 2
I
Supply
5.0V
14
RES
I
Reset In
2.9V
15
VDD 3
I
Supply
5.0V
16
AVREF
I
Reference voltage
2.9V
17
VDD 4
I
Supply
5.0V
18
A8
O
Used with IC2402
0.1V
19
A7
O
Used with IC2402
0.1V
20
A6
O
Used with IC2402
0.1V
21
A5
O
Used with IC2402
0.2V
22
A4
O
Used with IC2402
0.2V
23
A3
O
Used with IC2402
0.2V
24
A2
O
Used with IC2402
0.1V
25
A1
O
Used with IC2402
0V
26
A0
O
Used with IC2402
1.5V
27
A9
O
Used with IC2402
0V
28
A10
X
Not connected
3.5V
29
A11
X
Not connected
3.9V
30
RASQ
O
Used with IC2402
1.2V
31
WEQ
O
Used with IC2402
0V
32
D1
I/O
Used with IC2402
4.6V
33
D2
I/O
Used with IC2402
4.2V
34
D3
I/O
Used with IC2402
4.6V
35
D4
I/O
Used with IC2402
4.2V
36
VSS 4
X
Grounded
0V
37
CASQ
X
Not connected
4.6V
38
VSS 3
X
Grounded
0V
39
VBB
I
Reference
-1.9V
40
VSS 2
X
Grounded
0V
41
VSSA 2
X
Grounded
0V
42
RGB GND
X
Grounded
0V
43
VSS 1
X
Grounded
0V
44
R
O
Red output
0V
45
G
O
Green output
0V
46
B
O
Blue output
0V
47
BLAN
O
Blanking output
0.5V
48
CORQ
X
Not used
4.98V
49
M3CLK
I
Clock
4.98V
50
M3LDA
I/O
Data
0V
51
I2CEN
I
Data enable
0V
52
INTQ
X
Not connected
0V
DA100 (50Hz) and DA50W Chassis – Voltage Tables
Page 9 of 9
Sharp Electronics (UK) Limited - March 2003
Revision 1
IC201 - IF
Type:
Temic TDA4472 MFL
Sharp Part Number: RH-IX1672BMZZ
Package:
DIL
Price Code:
AP
This IC is the same type for all models. To date, it has no alternative.
Pin
Name
I/O
Comment
DC Voltage
1
SIF
I
Sound IF
3.2V
2
SIF
I
Sound IF
3.14V
3
IS
X
Not connected
3.4V
4
GND
X
Earth
0V
5
SAGC
I
Sound AGC
1.8V
6
VIF
I
Video IF
2.24V
7
VIF
I
Video IF
2.2V
8
VAGC
I
Video AGC
2.4V
9
GND
X
Earth
0V
10
AGC
I
Overall AGC
0.8V
11
RF AGC
I
RF AGC
3.4V
12
VOUT
O
Video output
2.1V
13
ST
X
Not connected
0V
14
L/L
X
Not connected
0V
15
BL
X
Not connected
0V
16
GND
X
Earth
0V
17
C
I
PLL control
4.25V
18
PLL
I
PLL control
2.2V
19
AFC
X
Not connected
3.47V
20
VCO
I
VCO control
3.1V
21
VCO
I
VCO control
3.3V
22
AFC
I
AFT conrol
2.1V
23
+V
I
Supply
5.1V
24
FM
O
To AFT control
2.1V
25
AM
X
Not connected
0V
26
OFS
X
Not connected
3.5V
27
SOF2
X
Not connected
0V
28
SIF2
X
Not connected
0V
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