Sony CCD-TR913E / CCD-TR950E Service Manual ▷ View online
5-45
2. 1.7 MHz Deviation Adjustment (VC-214 board)
Sets the spectrum of the R-ch ((L-R)/2 signal) level modulated during
recording. If deviated, the crosstalk signal of the audio signal will
occur and the audio level will drop during both playback and
recording.
recording. If deviated, the crosstalk signal of the audio signal will
occur and the audio level will drop during both playback and
recording.
Mode
VTR recording
Signal
Input the AFM DEV jig output signal to
the left and right audio input terminal
the left and right audio input terminal
Measurement Point
CH1: AFM DEV jig TP32
CH2: AFM DEV jig TP2
CH2: AFM DEV jig TP2
Measuring Instrument
Oscilloscope
ADD mode
CH2 normal mode
CH2 normal mode
Adjustment Page
F
Adjustment Address
63
Specified Value
The level difference between CH1 signal
and CH2 signal should be minimum.
and CH2 signal should be minimum.
Connection:
1)
1)
Connect TP24 ,TP25 and TP26 of the AFM DEV jig to CN910
of the VC-214 board.
of the VC-214 board.
TP24(GND) ................ Pin 8 of CN910
TP25(REC RF) ........... Pin 0 of CN910
TP26(RF SWP) .......... Pin !¡ of CN910
TP25(REC RF) ........... Pin 0 of CN910
TP26(RF SWP) .......... Pin !¡ of CN910
2)
Connect the audio output terminal (J1 and J2) of the AFM DEV
jig to AUDIO terminal of the unit.
jig to AUDIO terminal of the unit.
3)
Connect TP28(DC), TP27(GND) of the AFM DEV jig to the
DC power supply (+7Vdc to +9Vdc).
DC power supply (+7Vdc to +9Vdc).
4)
Set the AFM DEV jig switches to the following positions.
S1 ........................... BIL Position
S2 ........................... PAL Position
S3 ........................... INV Position
S2 ........................... PAL Position
S3 ........................... INV Position
Preparations only for the model without REC switch:
1)
1)
Select page: 0, address: 01, and set data: 01.
2)
Select page: D, address: 14, after memorizing the data, set the
bit value of bit1 to “1”. (Refer to “4-3, 3. Bit value
discrimination” of “5-4. Service Mode”).
bit value of bit1 to “1”. (Refer to “4-3, 3. Bit value
discrimination” of “5-4. Service Mode”).
3)
Select page: D, address: 15, after memorizing the data, set the
bit value of bit7 to “0”.
bit value of bit7 to “0”.
4)
Set to recording mode. (Use the wireless remote commander
of 8mm VCR.)
of 8mm VCR.)
Adjusting method :
1)
1)
Match the vertical ranges of CH1 and CH2 of the oscilloscope
to each other.
to each other.
2)
Set the oscilloscope to the ADD mode and CH2 to the normal
mode.
mode.
3)
Select page: 0, address: 01, and set data: 01.
4)
Select page: F, address: 63, change the data and minimize the
audio signal level difference (A).
audio signal level difference (A).
5)
Press the PAUSE button of the adjustment remote commander.
6)
Select page: 0, address: 01, and set data: 00.
Processing after completed adjustment only for the model
without REC switch:
1)
without REC switch:
1)
Select page: 0, address: 01, and set data: 01.
2)
Select page: D, address: 14, and set the data memorized at step
2) of “Preparations only for the model without REC switch”.
2) of “Preparations only for the model without REC switch”.
3)
Press the PAUSE button of the adjustment remote commander.
4)
Select page: D, address: 15, and set the data memorized at step
3) of “Preparations only for the model without REC switch”.
3) of “Preparations only for the model without REC switch”.
5)
Press the PAUSE button.
6)
Select page: 0, address: 01, and set data: 00.
A
Approx. 2msec
Fig. 5-3-21.
5-46
3. BPF f
0
Adjustment (VC-214 board)
Sets the BPF passing frequency so that the AFM signal can separate
from the playback RF signal properly. If deviated. the mono/stereo
mode will be differentiated incorrectly, and noises and distortions
will increase during high volume playback.
from the playback RF signal properly. If deviated. the mono/stereo
mode will be differentiated incorrectly, and noises and distortions
will increase during high volume playback.
Mode
Playback
Signal
Alignment tape:
For BPF adjustment
(WR5-11CS)
(WR5-11CS)
Measurement Point
Audio output terminal left or right
Measuring Instrument
distortion meter
Adjustment Page
F
Adjustment Address
64
Specified Value
The Main and Sub channel distortion
rate should be almost the same
(within ± 1%) and minimum.
rate should be almost the same
(within ± 1%) and minimum.
Adjusting method :
1)
1)
Select page: 0, address: 01, and set data: 01.
2)
Set the Hi-Fi sound switch (menu display) to “2”.
3)
Select page: F, address: 64, change the data and minimize the
distortion rate.
distortion rate.
4)
Press the PAUSE button of the adjustment remote commander.
5)
Set the Hi-Fi sound switch (menu display) to “1”.
6)
Select page: F, address: 64, change the data and minimize the
distortion rate.
distortion rate.
7)
Press the PAUSE button of the adjustment remote commander.
8)
Repeat steps 2) to 7) and set the data of address: 64 so that the
distortions rates when the Hi-Fi sound switch is set to “2” and
set to “1” respectively are almost the same and minimum.
distortions rates when the Hi-Fi sound switch is set to “2” and
set to “1” respectively are almost the same and minimum.
9)
Press the PAUSE button of the adjustment remote commander.
10) Select page: 0, address: 01, and set data: 00.
11) Set the Hi-Fi sound switch to “STEREO”.
11) Set the Hi-Fi sound switch to “STEREO”.
5-47
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.
• 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.
• Writing the adjustment data
The PAUSE button must be pressed to write the adjustment
data (D, E, F page) in the nonvolatile memory. (The new
adjusting data will not be recorded in the nonvolatile memory
if this step is not performed.)
data (D, E, F 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 (8.4 V) once.
supply (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 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.
5-48
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. 5-4-1.
