Sharp 28HW-53 (serv.man4) Service Manual ▷ View online
10
28HW-53H
Contrast Adjustments
Three types of contrast levels can be varied as listed be-
low:
• TELETEXT MIX MODE CONTRAST
low:
• TELETEXT MIX MODE CONTRAST
• TELETEXT CONTRAST
• OSD CONTRAST
Use the volume up/down buttons to adjust to a suitable level,
then press the standby button to store.
Use the volume up/down buttons to adjust to a suitable level,
then press the standby button to store.
DVCO Adjustment (PAL)
Carry out the DVCO Adjustment (PAL) as shown below:
1.
1.
Receive a Phillips pattern signal.
2.
While in the DVCO ADJUSTMENT (PAL) menu, press
the standby button.
the standby button.
3.
DVCO Adjustment (NTSC)
No adjustment required.
Auto Installation On/Off
AGC Adjustment
To correctly align the Automatic Gain Control, follow the
procedure outlined below:
procedure outlined below:
automatically.
AFT Adjustment
To correctly align the Automatic Fine Tune, follow the
procedure outlined below:
procedure outlined below:
automatically.
LED FLASHING CODES
This model is not provided with stereo led, so to let “flashing
codes” for IC failures detection when the TV set does not
work, we have answered with the next solution:
codes” for IC failures detection when the TV set does not
work, we have answered with the next solution:
• The detection of failure will be made with an external LED.
• The output of the flashing code will be via AV1 (pin 12).
• Insert a generic led diode between pin 12 and ground (i.e.
pin 5, 13 or 21) as shows the below picture.
Follow the sequence according to the information below, as
a guide to fault finding.
a guide to fault finding.
1. Unable to read or write into NVM: 66% ON, 33% OFF
twice and OFF for a second.
2. MSP failure: 66% ON, 33% OFF for three times and
OFF for a second.
3. VDP failure: 66% ON, 33% OFF for four times and OFF
for a second.
NOTE:
If you want to check that the system is working, open resis-
tor R307 to avoid I
If you want to check that the system is working, open resis-
tor R307 to avoid I
2
C comunication with MSP. The TV set
21
21
19
17
15
13
11
9
7
5
3
1
20
18
16
14
12
10
8
6
4
2
On Off
On Off
On Off
10
28HW-53H
Contrast Adjustments
Three types of contrast levels can be varied as listed be-
low:
• TELETEXT MIX MODE CONTRAST
low:
• TELETEXT MIX MODE CONTRAST
• TELETEXT CONTRAST
• OSD CONTRAST
Use the volume up/down buttons to adjust to a suitable level,
then press the standby button to store.
Use the volume up/down buttons to adjust to a suitable level,
then press the standby button to store.
DVCO Adjustment (PAL)
Carry out the DVCO Adjustment (PAL) as shown below:
1.
1.
Receive a Phillips pattern signal.
2.
While in the DVCO ADJUSTMENT (PAL) menu, press
the standby button.
the standby button.
3.
DVCO Adjustment (NTSC)
No adjustment required.
Auto Installation On/Off
AGC Adjustment
To correctly align the Automatic Gain Control, follow the
procedure outlined below:
procedure outlined below:
automatically.
AFT Adjustment
To correctly align the Automatic Fine Tune, follow the
procedure outlined below:
procedure outlined below:
automatically.
LED FLASHING CODES
This model is not provided with stereo led, so to let “flashing
codes” for IC failures detection when the TV set does not
work, we have answered with the next solution:
codes” for IC failures detection when the TV set does not
work, we have answered with the next solution:
• The detection of failure will be made with an external LED.
• The output of the flashing code will be via AV1 (pin 12).
• Insert a generic led diode between pin 12 and ground (i.e.
pin 5, 13 or 21) as shows the below picture.
Follow the sequence according to the information below, as
a guide to fault finding.
a guide to fault finding.
1. Unable to read or write into NVM: 66% ON, 33% OFF
twice and OFF for a second.
2. MSP failure: 66% ON, 33% OFF for three times and
OFF for a second.
3. VDP failure: 66% ON, 33% OFF for four times and OFF
for a second.
NOTE:
If you want to check that the system is working, open resis-
tor R307 to avoid I
If you want to check that the system is working, open resis-
tor R307 to avoid I
2
C comunication with MSP. The TV set
21
21
19
17
15
13
11
9
7
5
3
1
20
18
16
14
12
10
8
6
4
2
On Off
On Off
On Off
10
28HW-53H
Contrast Adjustments
Three types of contrast levels can be varied as listed be-
low:
• TELETEXT MIX MODE CONTRAST
low:
• TELETEXT MIX MODE CONTRAST
• TELETEXT CONTRAST
• OSD CONTRAST
Use the volume up/down buttons to adjust to a suitable level,
then press the standby button to store.
Use the volume up/down buttons to adjust to a suitable level,
then press the standby button to store.
DVCO Adjustment (PAL)
Carry out the DVCO Adjustment (PAL) as shown below:
1.
1.
Receive a Phillips pattern signal.
2.
While in the DVCO ADJUSTMENT (PAL) menu, press
the standby button.
the standby button.
3.
DVCO Adjustment (NTSC)
No adjustment required.
Auto Installation On/Off
AGC Adjustment
To correctly align the Automatic Gain Control, follow the
procedure outlined below:
procedure outlined below:
automatically.
AFT Adjustment
To correctly align the Automatic Fine Tune, follow the
procedure outlined below:
procedure outlined below:
automatically.
LED FLASHING CODES
This model is not provided with stereo led, so to let “flashing
codes” for IC failures detection when the TV set does not
work, we have answered with the next solution:
codes” for IC failures detection when the TV set does not
work, we have answered with the next solution:
• The detection of failure will be made with an external LED.
• The output of the flashing code will be via AV1 (pin 12).
• Insert a generic led diode between pin 12 and ground (i.e.
pin 5, 13 or 21) as shows the below picture.
Follow the sequence according to the information below, as
a guide to fault finding.
a guide to fault finding.
1. Unable to read or write into NVM: 66% ON, 33% OFF
twice and OFF for a second.
2. MSP failure: 66% ON, 33% OFF for three times and
OFF for a second.
3. VDP failure: 66% ON, 33% OFF for four times and OFF
for a second.
NOTE:
If you want to check that the system is working, open resis-
tor R307 to avoid I
If you want to check that the system is working, open resis-
tor R307 to avoid I
2
C comunication with MSP. The TV set
21
21
19
17
15
13
11
9
7
5
3
1
20
18
16
14
12
10
8
6
4
2
On Off
On Off
On Off
10
28HW-53H
Contrast Adjustments
Three types of contrast levels can be varied as listed be-
low:
• TELETEXT MIX MODE CONTRAST
low:
• TELETEXT MIX MODE CONTRAST
• TELETEXT CONTRAST
• OSD CONTRAST
Use the volume up/down buttons to adjust to a suitable level,
then press the standby button to store.
Use the volume up/down buttons to adjust to a suitable level,
then press the standby button to store.
DVCO Adjustment (PAL)
Carry out the DVCO Adjustment (PAL) as shown below:
1.
1.
Receive a Phillips pattern signal.
2.
While in the DVCO ADJUSTMENT (PAL) menu, press
the standby button.
the standby button.
3.
DVCO Adjustment (NTSC)
No adjustment required.
Auto Installation On/Off
AGC Adjustment
To correctly align the Automatic Gain Control, follow the
procedure outlined below:
procedure outlined below:
automatically.
AFT Adjustment
To correctly align the Automatic Fine Tune, follow the
procedure outlined below:
procedure outlined below:
automatically.
LED FLASHING CODES
This model is not provided with stereo led, so to let “flashing
codes” for IC failures detection when the TV set does not
work, we have answered with the next solution:
codes” for IC failures detection when the TV set does not
work, we have answered with the next solution:
• The detection of failure will be made with an external LED.
• The output of the flashing code will be via AV1 (pin 12).
• Insert a generic led diode between pin 12 and ground (i.e.
pin 5, 13 or 21) as shows the below picture.
Follow the sequence according to the information below, as
a guide to fault finding.
a guide to fault finding.
1. Unable to read or write into NVM: 66% ON, 33% OFF
twice and OFF for a second.
2. MSP failure: 66% ON, 33% OFF for three times and
OFF for a second.
3. VDP failure: 66% ON, 33% OFF for four times and OFF
for a second.
NOTE:
If you want to check that the system is working, open resis-
tor R307 to avoid I
If you want to check that the system is working, open resis-
tor R307 to avoid I
2
C comunication with MSP. The TV set
21
21
19
17
15
13
11
9
7
5
3
1
20
18
16
14
12
10
8
6
4
2
On Off
On Off
On Off
