Sony DCR-TRV24E / DCR-TRV25E / DCR-TRV27E (serv.man2) Service Manual ▷ View online
5-52
DCR-TRV24E/TRV25E/TRV27E
3-5.
AUDIO SYSTEM ADJUSTMENTS
[Connection of Audio System Measuring Devices]
Connect the audio system measuring devices as shown in Fig. 5-3-9.
Fig. 5-3-9.
Recording (Camera mode)
Audio oscillator
Attenuator
600
Ω
Left
Right
Main unit
MIC
600
Ω
: 270
Ω
(1-249-410-11) + 330
Ω
(1-249-411-11)
Main unit
AUDIO/
VIDEO
OUT
Left (White)
Right
47k
Ω
47k
Ω
Video (Yellow)
TV monitor
Audio level meter
or Distortion meter
47k
Ω
(1-249-437-11)
Playback
(Red)
5-53
DCR-TRV24E/TRV25E/TRV27E
1. Playback Level Check
Mode
VTR playback
Signal
Alignment tape:
For audio operation check
(XH5-3P)
(XH5-3P)
Measurement Point
Audio left or right terminal of AUDIO
VIDEO jack
VIDEO jack
Measuring Instrument
Audio level meter and frequency
counter
counter
Specified Value
32 kHz mode: 1 kHz, +3.0 ± 2.0dBs
48 kHz mode: 1 kHz, +3.0 ± 2.0dBs
44.1 kHz mode:
The 7.35kHz signal level during EMP
OFF is +2.0 ± 2.0dBs.
The 7.35kHz signal level during EMP
ON is –6 ± 2 dB from the signal level
during EMP OFF.
48 kHz mode: 1 kHz, +3.0 ± 2.0dBs
44.1 kHz mode:
The 7.35kHz signal level during EMP
OFF is +2.0 ± 2.0dBs.
The 7.35kHz signal level during EMP
ON is –6 ± 2 dB from the signal level
during EMP OFF.
Checking Method:
1)
1)
Check that the playback signal level is the specified value.
2. Overall Level Characteristics Check
Mode
Camera recording and playback
Signal
400Hz, –66 dBs signal: MIC jack left
and right
and right
Measurement Point
Audio left or right terminal of AUDIO
VIDEO jack
VIDEO jack
Measuring Instrument
Audio level meter
Specified Value
–7.5 ± 3.0dBs
Checking Method:
1)
1)
Input the 400Hz, –66dBs signal in the MIC jack.
2)
Record in the camera mode.
3)
Playback the recorded section.
4)
Check that the 400Hz signal level is the specified value.
3. Overall Distortion Check
Mode
Camera recording and playback
Signal
400Hz, –66dBs signal: MIC jack left
and right
and right
Measurement Point
Audio left or right terminal of AUDIO
VIDEO jack
VIDEO jack
Measuring Instrument
Audio distortion meter
Specified Value
Below 0.4%
(200Hz to 6kHz BPF ON)
(200Hz to 6kHz BPF ON)
Checking Method:
1)
1)
Input the 400Hz, –66dBs signal in the MIC jack.
2)
Record in the camera mode.
3)
Playback the recorded section.
4)
Check that the distortion is the specified value.
4. Overall Noise Level Check
Mode
Camera recording and playback
Signal
No signal: Insert a shorting plug in the
MIC jack
MIC jack
Measurement Point
Audio left or right terminal of AUDIO
VIDEO jack
VIDEO jack
Measuring Instrument
Audio level meter
Specified Value
Below –45dBs
(IHF-A filter ON, 20kHz LPF ON)
(IHF-A filter ON, 20kHz LPF ON)
Checking Method:
1)
1)
Insert a shorting plug in the MIC jack.
2)
Record in the camera mode.
3)
Playback the recorded section.
4)
Check that the noise level is the specified value.
5. Overall Separation Check
Mode
Camera recording and playback
Signal
400Hz, –66dBs signal: MIC jack
<right> [left]
(Connect the MIC jack <left> [right]
to GND)
<right> [left]
(Connect the MIC jack <left> [right]
to GND)
Measurement Point
Audio <left> [right] terminal of
AUDIO VIDEO jack
AUDIO VIDEO jack
Measuring Instrument
Audio level meter
Specified Value
Below –40dBs (IHF-A filter ON)
< > : Left channel check
[ ] : Right channel check
[ ] : Right channel check
Checking Method:
1)
1)
Input the 400Hz, –66dBs signal in the <right> [left] terminal
of the MIC jack only.
of the MIC jack only.
2)
Record in the camera mode.
3)
Playback the recorded section.
4)
Check that the signal level of the audio <left> [right] terminal
is the specified value.
is the specified value.
5-54
DCR-TRV24E/TRV25E/TRV27E
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 19 pages, from 0 to F, 1B, 1E, 1F. (Note)
and decreases when the EDIT SEARCH– button is pressed.
There are altogether 19 pages, from 0 to F, 1B, 1E, 1F. (Note)
• 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 (8, A, B, C, D, E, F, 1B, 1E, 1F page) in the nonvolatile
memory. (The new adjusting data will not be recorded in the
nonvolatile memory if this step is not performed.)
data (8, A, B, C, D, E, F, 1B, 1E, 1F 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 once.
supply once.
Note:
When reading or writing the 1B, 1E, 1F page data, select page:
0, address: 10, and set data: 01, then select B, E or F page. The
1B, 1E or 1F page can be chosen by this data setting.
After reading or writing, reset the data of page: 0, address: 10
to “00”.
0, address: 10, and set data: 01, then select B, E or F page. The
1B, 1E or 1F page can be chosen by this data setting.
After reading or writing, reset the data of page: 0, address: 10
to “00”.
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
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.
Page
Data
Address
5-55
DCR-TRV24E/TRV25E/TRV27E
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
75
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. 5-4-1.
