Sony CCD-TRV118 / CCD-TRV218E / CCD-TRV318 / CCD-TRV418 / CCD-TRV418E (serv.man2) Service Manual ▷ View online
CCD-TRV118/TRV218E/TRV318/TRV418/TRV418E
6-39
7-3.
REC AFM Current Adjustment (VC-303 board)
Check the recording current level of the REC AFM signal.
If it is too low, the audio S/N will be deteriorated. If too high,
color beets will be produced on self recording/playback image.
If it is too low, the audio S/N will be deteriorated. If too high,
color beets will be produced on self recording/playback image.
Mode
VTR recording
Signal
No signal
Measurement Point
REC RF (Pin 7 of CN712)
Measuring Instrument
Oscilloscope
(20 MHz BW LIMIT: OFF)
(20 MHz BW LIMIT: OFF)
Adjustment Page
F
Adjustment Address
69
Specified value
NTSC model
A = (REC chroma signal level)
A = (REC chroma signal level)
× 0.292
± 0.9 mVp-p (Note 1)
PAL model
A = (REC chroma signal level)
A = (REC chroma signal level)
× 0.309
± 0.9 mVp-p (Note 1)
Note 1:
REC chroma signal level is noted down at step 10 of “REC
C Current Check”
C Current Check”
Adjusting method:
Order Page Address Data
Procedure
1
Close the cassette compart-
ment without inserting
cassette.
ment without inserting
cassette.
2
Set to the VTR recording
mode. (Note 2)
mode. (Note 2)
3
0
01
01
4
E
9F
Note down the data.
5
E
9F
07
Press PAUSE button.
6
2
01
41
Press PAUSE button.
7
F
69
Change the data and set the
REC AFM signal level (A) to
the specified value.
REC AFM signal level (A) to
the specified value.
8
F
69
Press PAUSE button.
9
2
01
00
Press PAUSE button.
10
E
9F
Set data noted down at step 4,
and press PAUSE button.
and press PAUSE button.
11
0
01
00
12
Perform “Processing after
Completed Adjustment”.
Completed Adjustment”.
Note 2:
Use the REC buttons of the adjustment remote com-
mander (with HOLD switch set in the OFF position).
mander (with HOLD switch set in the OFF position).
7-4.
Processing after Completed Adjustment
Order Page Address Data
Procedure
1
Set to the VTR stop mode.
2
0
01
01
3
D
14
Set data noted down at step 6
of “7-1. Preparations”, and
press PAUSE button.
of “7-1. Preparations”, and
press PAUSE button.
4
D
15
Set data noted down at step 8
of “7-1. Preparations”, and
press PAUSE button.
of “7-1. Preparations”, and
press PAUSE button.
5
D
10
00
Press PAUSE button.
6
F
20
00
Press PAUSE button.
7
0
01
00
Fig. 6-3-12
A
0.67
µ
sec
Center of the luminance line width
CCD-TRV118/TRV218E/TRV318/TRV418/TRV418E
6-40
COVER
COVER
3-5.
AUDIO SYSTEM ADJUSTMENTS
[Connecting the measuring instruments for the audio]
Connect the audio system measuring instruments in addition to
the video system measuring instruments as shown in Fig. 6-3-13.
the video system measuring instruments as shown in Fig. 6-3-13.
Fig. 6-3-13
Main unit
47 k
Ω
47 k
Ω
: 1-249-437-11
Audio level meter
or distortion meter
TV monitor
A/V OUT
jack
Video
Audio
In Playback
1. BPF f
0
Adjustment (VC-303 board)
Set the BPF passing frequency of IC351 so that the AFM signal
can separate from the playback RF signal properly. If deviated,
the noises and distortions will increase during high volume play-
back.
can separate from the playback RF signal properly. If deviated,
the noises and distortions will increase during high volume play-
back.
Mode
VTR playback
Signal
Alignment tape
For BPF adjustment
(WR5-11NS (NTSC))
(WR5-11CS (PAL))
(WR5-11NS (NTSC))
(WR5-11CS (PAL))
Measurement Point
Audio terminal of A/V OUT jack
Measuring Instrument
Distortion meter
Adjustment Page
F
Adjustment Address
74
Specified value
The distortion rate should be
minimum.
minimum.
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
2
F
74
Change the data and minimize
the distortion rate.
the distortion rate.
3
F
74
Press PAUSE button.
4
0
01
00
2. 1.5 MHz Deviation Adjustment (VC-303 board)
Adjust to the optimum 1.5 MHz audio FM signal deviation.
If the adjustment is not correct, its playback level will differ from
that other units.
If the adjustment is not correct, its playback level will differ from
that other units.
Mode
VTR playback
Signal
Alignment tape
For checking operation
(WR5-5NSP (NTSC))
(WR5-5CSP (PAL))
(WR5-5NSP (NTSC))
(WR5-5CSP (PAL))
Measurement Point
Audio terminal of A/V OUT jack
Measuring Instrument
Audio level meter
Adjustment Page
F
Adjustment Address
73
Specified value
–7.5
± 2.0 dBs
Note:
Perform “BPF f
0
Adjustment” before this adjustment.
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
2
F
73
Change the data and set the
400 Hz audio signal level to
the specified value.
400 Hz audio signal level to
the specified value.
3
F
73
Press PAUSE button.
4
0
01
00
CCD-TRV118/TRV218E/TRV318/TRV418/TRV418E
6-41
COVER
COVER
6-4. SERVICE MODE
4-1.
ADJUSTMENT REMOTE COMMANDER
The adjustment remote commander is used for changing the cal-
culation coefficient in signal processing, EVR data, etc. The ad-
justment remote commander performs bi-directional
communication with the unit using the remote commander signal
line (LANC). The resultant data of this bi-directional communica-
tion is written in the non-volatile memory.
culation coefficient in signal processing, EVR data, etc. The ad-
justment remote commander performs bi-directional
communication with the unit using the remote commander signal
line (LANC). The resultant data of this bi-directional communica-
tion is written in the non-volatile memory.
1.
Using the Adjustment Remote Commander
1) Connect the adjustment remote commander to CN712 of VC-
303 board via I/F unit for LANC control (J-6082-521-A) and
CPC jig connector (J-6082-539-A).
CPC jig connector (J-6082-539-A).
2) Set the HOLD switch of the adjustment remote commander to
“HOLD” (SERVICE position). If it has been properly con-
nected, the LCD on the adjustment remote commander will
display as shown in Fig. 6-4-1.
nected, the LCD on the adjustment remote commander will
display as shown in Fig. 6-4-1.
Fig. 6-4-1
3) Operate the adjustment remote commander as follows.
• 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 (M) button is pressed,
and decreases when the REW (m) button is pressed. There
are altogether 256 addresses, from 00 to FF.
and decreases when the REW (m) button is pressed. There
are altogether 256 addresses, from 00 to FF.
• Changing the data (Data setting)
The data increases when the PLAY (N) button is pressed,
and decreases when the STOP (x) button is pressed. There
are altogether 256 data, from 00 to FF.
and decreases when the STOP (x) 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 in the nonvolatile memory. (The new adjusting data will
not be recorded in the nonvolatile memory if this step is not
performed)
data 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 sup-
ply (8.4 V) 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 1112 13 14 15
2. Precautions Upon Using
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 adjust-
ments 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 adjust-
ments and new adjustment data after each adjustment.
CCD-TRV118/TRV218E/TRV318/TRV418/TRV418E
6-42
COVER
COVER
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
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 nota-
tion, 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 nota-
tion, calculate and convert the result to hexadecimal notation, and
use it as the adjustment data. Indicates the hexadecimal-decimal
conversion table.
Table 6-4-1
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