Sharp 66GS-62 (serv.man11) Service Manual ▷ View online
9
66GS-62H
Corner Symmetry
Adjust the Corner Symmetry so that the picture is centred.
The effect of this adjustment is shown in figure 7.
Note: This adjustment affects to upper and lower sides.
The effect of this adjustment is shown in figure 7.
Note: This adjustment affects to upper and lower sides.
• When the volume up button is pressed, side pincushion changes from pincushion to
barrel shape.
• When the volume down button is pressed, side pincushion changes from pincushion to
barrel shape.
• Press the stand-by button on the remote control to store.
Vertical Linearity
Adjust the Vertical Linearity so that the upper and lower parts of the picture are symmetrical.
The effect of this adjustment is shown in figure 8.
The effect of this adjustment is shown in figure 8.
• When the volume up button is pressed, the upper picture scanning decreases and the
lower picture scanning increases.
• When the volume down button is pressed, the upper picture scanning increases and the
lower picture scanning decreases.
• Press the stand-by button on the remote control to store.
Vertical Angle
Adjust the Vertical Amplitude so that the picture is centred.
The effect of this adjustment is shown in figure 9
Adjust the Vertical Amplitude so that the picture is centred.
The effect of this adjustment is shown in figure 9
• When the volume up button is pressed, the vertical angle changes to right.
• When the volume down button is pressed, the vertical angle changes to left.
• Press the stand-by button on the remote control to store.
Vertical Bow
Adjust the Vertical Bow so that the picture is centred.
The effect of this adjustment is shown in figure 10
Adjust the Vertical Bow so that the picture is centred.
The effect of this adjustment is shown in figure 10
• When the volume up button is pressed, the vertical bow changes to right.
• When the volume down button is pressed, the vertical bow changes to left.
• Press the stand-by button on the remote control to store.
Vertical Amplitude
Adjust the Vertical Amplitude so that the picture is over-scanned.
The effect of this adjustment is shown in figure 11.
The effect of this adjustment is shown in figure 11.
• When the volume up button is pressed, the vertical size of the picture decreases.
• When the volume down button is pressed, the vertical size of the picture increases.
• Press the stand-by button on the remote control to store.
S Correction
Adjust the S Correction so that the picture symmetrical between the top, centre and bottom.
The effect of this adjustment is shown in figure 12.
The effect of this adjustment is shown in figure 12.
• When the volume up button is pressed, the top and bottom scanning increases and the
centre scanning decreases.
Fig.8
Fig.12
Fig.11
Fig.10
Fig.9
Fig.7
10
66GS-62H
Colour Adjustments
The following adjustments should only be carried out when
the CRT IC801 are replaced.
the CRT IC801 are replaced.
G2, Cut Off and Gain Adjustments
1. Follow the procedure below to set the G2
1.1 Tune the set to the output of a signal generator
(cross hatch pattern).
1.2 In the user menu, set contrast to 80/100 and
brightness to 40/100.
1.3 Connect the oscilloscope to the red cathode and
adjust G2 to read 140V on the sensor pulse as
in the drawing:
in the drawing:
NOTE:
Oscilloscope should be adjusted for vertical TV field trigger
and synchronized with video signal.
Oscilloscope should be adjusted for vertical TV field trigger
and synchronized with video signal.
2. Follow the procedure below to set the Cut Off.
2.1 Adjust G2.
2.2 Tune a white card.
2.3 Adjust colour to minimum.
2.4 Position colorimeter in the centre of screen.
2.5 Adjust brightness and contrast to obtain a lumi-
2.2 Tune a white card.
2.3 Adjust colour to minimum.
2.4 Position colorimeter in the centre of screen.
2.5 Adjust brightness and contrast to obtain a lumi-
nance of
≈20 NITS.
2.6 Operate in Service Mode and select location RED
CUT OFF, GREEN CUT OFF and BLUE CUT
OFF, to obtain colour coordinates:
OFF, to obtain colour coordinates:
X=0.290 ± 0.015 Y=0.284 ± 0.015
To increase press volume-up button and to decrease press
volume down button.
volume down button.
RED CUT OFF
alter «X» coordinate.
GREEN CUT OFF alter «Y» coordinate.
BLUE CUT OFF
BLUE CUT OFF
alter «X» and «Y» coordinate.
3. Follow the procedure below to set the GAIN.
3.1 Using brightness and contrast buttons, select a
luminance of
≈120 NITS.
3.2 Operate in Service Mode and select location RED
GAIN, GREEN GAIN and BLUE GAIN, to obtain
colour coordinates:
colour coordinates:
X=0.290 ± 0.015 Y=0.284 ± 0.015
To increase press volume-up button and to decrease
press volume down button.
RED GAIN alter «X» coordinate.
GREEN GAIN alter «Y» coordinate.
BLUE GAIN alter «X» and «Y» coordinate.
GREEN GAIN alter «Y» coordinate.
BLUE GAIN alter «X» and «Y» coordinate.
3.3 Exit Service Mode and check colour coordinates
«X» and «Y» at 20 and 120 NITS. It may be nec-
essary to repeat procedure 2 and 3 of Colour
Adjustments.
essary to repeat procedure 2 and 3 of Colour
Adjustments.
Changing NVM Data
To change the data contained within the Non Volatile
Memory, it is necessary to first select the page the data is
stored in, then the position and finally to change the data
itself. The procedure below outlines this process.
Memory, it is necessary to first select the page the data is
stored in, then the position and finally to change the data
itself. The procedure below outlines this process.
1. While on ALTER NVM PAGE, use the volume up/down
buttons to change this data (data is shown in hexadecimal
format).
format).
2. Press the channel up button and ALTER NVM POSITION
appears, use the volume up/down buttons to change this
data (data is shown in hexadecimal format).
data (data is shown in hexadecimal format).
3. Press the channel up button and ALTER NVM VALUE
appears, use the volume up/down buttons to change this
data (data is shown in hexadecimal format).
data (data is shown in hexadecimal format).
• When the volume down button is pressed the top and bottom scanning decreases and
the centre scanning increases.
• Press the stand-by button on the remote control to store.
Vertical Shift
Adjust the Vertical Shift so that the picture is centred.
The effect of this adjustment is shown in figure 13.
The effect of this adjustment is shown in figure 13.
• When the volume up button is pressed, the picture moves down.
• When the volume down button is pressed, the picture moves up.
• Press the stand-by button on the remote control to store.
Fig.13
140 V
CH1 gnd
11
66GS-62H
4. Once this data has been set, press the stand-by button
to store.
5. If another NVM value has to be changed, use the chan-
nel down button to select the page or position and repeat
as necessary.
as necessary.
Note:
DO NOT change any NVM data, unless you have been ad-
vised to do so by a Sharp representative. If data is incor-
rectly changed, serious damage may occur to the receiver.
DO NOT change any NVM data, unless you have been ad-
vised to do so by a Sharp representative. If data is incor-
rectly changed, serious damage may occur to the receiver.
Contrast Adjustments
Three types of contrast levels can be varied as listed be-
low:
low:
• TELETEXT MIX MODE CONTRAST
• TELETEXT CONTRAST
• OSD CONTRAST
Use the volume up/down buttons to adjust to a suitable level,
then press the stand-by button to store.
then press the stand-by button to store.
DVCO Adjustment (PAL)
Carry out the DVCO Adjustment (PAL) as shown below:
Carry out the DVCO Adjustment (PAL) as shown below:
1.
Receive a Phillips pattern signal.
2.
While in the DVCO ADJUSTMENT (PAL) menu, press
the stand-by button.
the stand-by button.
3.
The adjustment will be carried out automatically and
stored.
stored.
DVCO Adjustment (NTSC)
No adjustment required.
No adjustment required.
AGC Adjustment
To correctly align the Automatic Gain Control, follow the
procedure outlined below:
To correctly align the Automatic Gain Control, follow the
procedure outlined below:
1. Tune the set into a pattern generator on CH10.
2. Adjust the signal strength of the pattern generator to 57
2. Adjust the signal strength of the pattern generator to 57
dB/uV
3. Enter the service mode.
4. Enter the AGC Adjustment menu.
5. Press the stand-by button on the remote control.
6. The adjustment will be carried out and stored automati-
4. Enter the AGC Adjustment menu.
5. Press the stand-by button on the remote control.
6. The adjustment will be carried out and stored automati-
cally.
Auto Installation On/Off
To return the receiver to the original Auto Installation mode,
using the volume up or down button, set the Auto Installa-
tion On/Off to On. This setting is automatically stored and
when the receiver is turned on the next time it will start up in
Auto Installation mode.
To return the receiver to the original Auto Installation mode,
using the volume up or down button, set the Auto Installa-
tion On/Off to On. This setting is automatically stored and
when the receiver is turned on the next time it will start up in
Auto Installation mode.
STEREO LED FLASHING CODES.
If the TV set does not work and the stereo led is flashing,
follow the sequence according to the information below, as
a guide to fault finding.
follow the sequence according to the information below, as
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. VCT failure: 66% ON, 33% OFF for four times and OFF
for a second.
On Off
On Off
On Off
12
66GS-62H
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1
2
3
4
5
6
7
8
9
10
Y
X
0
10
11
12
1
2
3
4
5
6
7
8
9
J326
C914
JF61
J1
C737
+
D627
VAR1
+
C904
1
(H).
FB703
C627
JL4
FB701
FB702
F703
F702
D798
J307
L610
C520 +
J1
F701
R906
C9
R908
J1
J
D621
C709
+
C5
J35
C712
+
J34
C603
JF28
Q602
C707
+
C642
J40
D634
L609
R603
C733
+
D721
D720
C728
+
D722
F704
J117
J118
J67
1
2
(G)
D702
C701
LP701
J1
R763
+
C727
R799
C730
C725
J115
J215
C729
+
C735 +
J149
L705
DIP
Q701
C798
J37
R790
D612
D613
D709
Q703
D729
D736
+
C710
C721
R553
R518
FB603
J207
J148
J155
J74
J122
C526
+
FB501
+C640
D510
K
IC705
R
J296
+
C609
D719
D605
C618
+
R501
R602
R214
R746
J1
D703
C706
D704
C703
D701
J151
J152
D611
J1
J3
T701
J1
R629
D609
C620
C623
+
C622
(L2)
1
2
3
4
5
6
7
8
9
10
11
12
T601
S702
S703
OPC1
S704
S705
R614
Q601
E
C
B
Q605
L501
L701
S701
T3.15AH
C504
R503
J1
J1
J1
J1
J217
J1
J272
J273
J1
IC703
J239
D602
J216
C630
J213
J214
J212
R601
F601
J1
J205
D610
M1000
J68
R747
C613
C511
+
C702
J4
R714
C704
C799
R718
C717
R723
C796
J116
Q702
J142
R617
R650
5
(H)
R609
R530
C738
R787
C713
J38
C625
C734
+
D740
R798
J2
+
C1019
C621
C601
5
4
3
2
1
(F)
C628
T702
J65
C726
+
R
IC702
K
JF27
D712
+
J153
J242
R651
R531
R554
+
C901
R907
L901
5
6
7
8
9
10
11
12
GND
TRC
L3
J16
C602
D607
TP701
TP601
TP602
J206
K
A
+
C732
J39
R738
(M)
1
2
3
Q709
+ C731
JF702
+
C720
POR701
D749
C711
J309
Q502
C705
F602
J322
L605
C617
J275
F7315N3. MOTHER UNIT PWB. Component side.
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