Sony GV-D300 Service Manual ▷ View online
5-37
8. Burst Cleaning Adjustment for PAL model
(CB-61 board)
(CB-61 board)
Adjust to the optimum PAL chroma signal demodulation phase. If
the phase is not correct, moire distortion noises will stand out.
the phase is not correct, moire distortion noises will stand out.
Mode
VTR stop
Signal
Color bar
Measurement Point
Pin
2 of CN9925 (VG)
Measuring Instrument
Oscilloscope
Adjustment Page
D
Adjustment Address
60
Specified Value
A = 0 ± 50mV
Note:
Perform “8. Burst Cleaning Adjustment for PAL model” and “9.
Color Adjustment for PAL model” alternately until each specified
value is satisfied.
Color Adjustment for PAL model” alternately until each specified
value is satisfied.
Adjusting method:
1)
1)
Select page: 0, address: 01, and set data: 01.
2)
Select page: D, address: 60, change the data and set the flicker
amplitude(A) of the cyan or green section to minimum.
amplitude(A) of the cyan or green section to minimum.
3)
Press the PAUSE button of the adjustment remote commander.
4)
Select page: 0, address: 01, and set data: 00.
5)
Perform “Color Adjustment for PAL model”.
Fig. 5-3-31.
9. Color Adjustment for PAL model (CB-61 board)
Set the color saturation to the standard value. If deviated, the color
will be to dark or light.
will be to dark or light.
Mode
VTR stop
Signal
Color bar
Measurement Point
Pin
2 of CN9925 (VG)
Measuring Instrument
Oscilloscope
Adjustment Page
D
Adjustment Address
6D
Specified Value
A = 0.54 ± 0.05V
Adjusting method:
1)
1)
Select page: 0, address: 01, and set data: 01.
2)
Select page: D, address: 6D, change the data and set the voltage
(A) between the yellow and green to the specified value.
(A) between the yellow and green to the specified value.
3)
Press the PAUSE button of the adjustment remote commander.
4)
Select page: 0, address: 01, and set data: 00.
5)
Check that the specified value of “Burst Cleaning Adjustment”
is satisfied, if not perform “Burst Cleaning Adjustment”.
is satisfied, if not perform “Burst Cleaning Adjustment”.
Fig. 5-3-32.
Cyan
A
2H
Green
Yellow
A
2H
5-38
10. V-COM Adjustment (CB-61 board)
Set the DC bias of the common electrode drive signal of LCD to the
specified value.
If deviated, the LCD display will move, producing flicker and
conspicuous horizontal lines.
specified value.
If deviated, the LCD display will move, producing flicker and
conspicuous horizontal lines.
Mode
Playback pause
Signal
Alignment tape:
For system operation check
monoscope section
(XH5-5 (NTSC))
(XH5-5P (PAL))
monoscope section
(XH5-5 (NTSC))
(XH5-5P (PAL))
Measurement Point
Check on LCD display
Measuring Instrument
Adjustment Page
D
Adjustment Address
65
Note1:
Perform “Bright Adjustment” and “Contrast Adjustment” before
this adjustment.
this adjustment.
Adjusting method:
1)
1)
Select page: 0, address: 01, and set data: 01.
2)
Select page: D, address: 65, change the data so that the
horizontal lines of the gray sections are not conspicuous.
horizontal lines of the gray sections are not conspicuous.
3)
Press the PAUSE button of the adjustment remote commander.
4)
Select page: 0, address: 01, and set data: 00.
11. White Balance Adjustment (CB-61 board)
Correct the white balance.
If deviated, the LCD screen color cannot be reproduced.
If deviated, the LCD screen color cannot be reproduced.
Mode
VTR stop
Signal
10-step stair-step signal or color bar
signal whose chroma and burst signals
are turned off
signal whose chroma and burst signals
are turned off
Measurement Point
Check on LCD display
Measuring Instrument
Adjustment Page
D
Adjustment Address
61, 62
Specified Value
The LCD screen should not be
colored.
colored.
Note1:
Check the white balance only when replacing the following parts.
If necessary, adjust them.
If necessary, adjust them.
1. LCD panel
2. Light induction plate
3. IC801
2. Light induction plate
3. IC801
Adjusting method:
1)
1)
Select page: 0, address: 01, and set data: 01.
2)
Select page: D, address: 61 and 62, and set the data to the initial
value.
value.
Note:
To write in the non-volatile memory (EEPROM), press the
PAUSE button of the adjustment remote commander each time
to set the data.
to set the data.
3)
Check that the LCD screen is not colored. If colored, change
the data of page: D, address: 61 and 62 so that the LCD screen
is not colored.
the data of page: D, address: 61 and 62 so that the LCD screen
is not colored.
Note:
To write in the non-volatile memory (EEPROM), press the
PAUSE button of the adjustment remote commander each time
to set the data.
to set the data.
4)
Select page: 0, address: 01, and set data: 00.
Address
Data
61
70
62
6F
5-39
5-4. SERVICE MODE
4-1.
ADJUSTMENT REMOTE COMMANDER
The adjustment remote commander is used for changing the
calculation coefficient in signal processing, EVR data, etc. The
adjustment remote commander performs bi-directional
communication with the unit using the remote commander signal
line (LANC). The resultant data of this bi-directional communication
is written in the non-volatile memory.
calculation coefficient in signal processing, EVR data, etc. The
adjustment remote commander performs bi-directional
communication with the unit using the remote commander signal
line (LANC). The resultant data of this bi-directional communication
is written in the non-volatile memory.
1. Using the adjustment remote commander
1)
Connect the adjustment remote commander to the LANC
terminal.
terminal.
2)
Set the HOLD switch of the adjustment remote commander to
“HOLD” (SERVICE position). If it has been properly
connected, the LCD on the adjustment remote commander will
display as shown in Fig. 5-4-1.
“HOLD” (SERVICE position). If it has been properly
connected, the LCD on the adjustment remote commander will
display as shown in Fig. 5-4-1.
Fig. 5-4-1.
3)
Operate the adjustment remote commander as follows.
• Changing the page
• Changing the page
The page increases when the EDIT SEARCH+ button is
pressed, and decreases when the EDIT SEARCH– button is
pressed. There are altogether 16 pages, from 0 to F.
pressed, and decreases when the EDIT SEARCH– button is
pressed. There are altogether 16 pages, from 0 to F.
• Changing the address
The address increases when the FF ()) button is pressed,
and decreases when the REW (0) button is pressed. There
are altogether 256 addresses, from 00 to FF.
and decreases when the REW (0) button is pressed. There
are altogether 256 addresses, from 00 to FF.
• Changing the data (Data setting)
The data increases when the PLAY (() button is pressed,
and decreases when the STOP (p) button is pressed. There
are altogether 256 data, from 00 to FF.
and decreases when the STOP (p) button is pressed. There
are altogether 256 data, from 00 to FF.
• Writing the adjustment data
The PAUSE button must be pressed to write the adjustment
data (C, D page) in the nonvolatile memory. (The new
adjusting data will not be recorded in the nonvolatile memory
if this step is not performed.)
data (C, D page) in the nonvolatile memory. (The new
adjusting data will not be recorded in the nonvolatile memory
if this step is not performed.)
4)
After completing all adjustments, turn off the main power
supply (8.4V) once.
supply (8.4V) once.
Page
Data
Address
Hexadecimal
notation
notation
LCD Display
Decimal notation
conversion value
conversion value
0 1 2 3 4 5 6 7 8 9 A B C D E F
0 1 2 3 4 5 6 7 8 9 A b c d E F
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
2. Precautions upon using
the adjustment remote commander
the adjustment remote commander
Mishandling of the adjustment remote commander may erase the
correct adjustment data at times. To prevent this, it is recommended
that all adjustment data be noted down before beginning adjustments
and new adjustment data after each adjustment.
correct adjustment data at times. To prevent this, it is recommended
that all adjustment data be noted down before beginning adjustments
and new adjustment data after each adjustment.
5-40
4-2.
DATA PROCESS
The calculation of the DDS display and the adjustment remote
commander display data (hexadecimal notation) are required for
obtaining the adjustment data of some adjustment items. In this
case, after converting the hexadecimal notation to decimal notation,
calculate and convert the result to hexadecimal notation, and use it
as the adjustment data. Indicates the hexadecimal-decimal
conversion table.
commander display data (hexadecimal notation) are required for
obtaining the adjustment data of some adjustment items. In this
case, after converting the hexadecimal notation to decimal notation,
calculate and convert the result to hexadecimal notation, and use it
as the adjustment data. Indicates the hexadecimal-decimal
conversion table.
Hexadecimal-decimal Conversion Table
Lower digit of
hexadecimal
Upper digit
of hexadecimal
of hexadecimal
0
1
2
3
4
5
6
7
8
9
A
(
A
)
B
(
b
)
C
(
c
)
D
(
d
)
E
(
E
)
F
(
F
)
0
1
2
3
4
5
6
7
8
9
A (
A
)
B (
b
)
C (
c
)
D (
d
)
E (
E
)
F (
F
)
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
77
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
174
159
175
160
161
162
163
164
165
166
167
168
169
170
171
172
173
177
176
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
0
1
Note:
The characters shown in the parenthesis ( ) shown the display on the adjustment remote commander.
(Example)
If the DDS display or the adjustment remote commander shows BD (
bd
);
Because the upper digit of the adjustment number is B (
b
), and the lower digit is D (
d
), the meeting point
“189” of
1 and 2 in the above table is the corresponding decimal number.
0
2
Table. 5-4-2.
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