Sony CCD-TRV66E / CCD-TRV77E Service Manual ▷ View online
5-43
(75
Ω
)
600
Ω
Video
L
R
Audio
AUDIO OUT
L
47k
Ω
47k
Ω
(1-249-437-11)
600
Ω
(270
Ω
(1-249-410-11) + 330
Ω
(1-249-411-11))
Pattern generator
Audio oscillator
Main unit
Attenuator
Audio level meter
VIDEO OUT
R
IR receiver jig
Fig. 5-3-18.
3. IR Audio Deviation Adjustment (VC-214 board)
Mode
VTR recording
Signal
Audio signal :
400Hz, –7.5dBs : L or R of AUDIO
400Hz, –7.5dBs : L or R of AUDIO
terminal
Video signal :
Color bar signal : VIDEO terminal
Color bar signal : VIDEO terminal
Measurement Point
AUDIO L terminal and AUDIO R
terminal of IR receiver jig
(Terminated at 47k
terminal of IR receiver jig
(Terminated at 47k
Ω
)
Measuring Instrument
Audio level meter
Adjustment Page
F
Adjustment Address
67
Specified Value
Signal level: –7.5 ± 2.0 dBs
Level difference of L and R: Below 2dB
Level difference of L and R: Below 2dB
Connection of Equipment
Connect the measuring device as shown in the following figure,
and adjust.
Connect the measuring device as shown in the following figure,
and adjust.
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)
Insert a tape, and set to recording mode. (Use the wireless
remote commander of 8mm VCR.)
remote commander of 8mm VCR.)
Adjusting method:
1)
1)
Select page: 0, address: 01, and set data: 01.
2)
Connect the audio level meter to the AUDIO L terminal of the
IR receiver jig.
IR receiver jig.
3)
Select page: F, address: 67, change the data and set the 400Hz
audio signal level to the specified value.
audio signal level to the specified value.
4)
Press the PAUSE button of the adjustment remote commander.
5)
Connect the audio level meter to the AUDIO R terminal of the
IR receiver jig.
IR receiver jig.
6)
Check that the 400Hz audio signal level is within the specified
value. If outside, repeat from step 2).
value. If outside, repeat from step 2).
7)
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: 0, address: 01, and set data: 00.
5-44
3-6. AUDIO SYSTEM ADJUSTMENT
• Perform the adjustment using color bar signal as a video signal
input for the VIDEO terminal.
• The items to be adjusted for the R channel will be indicated within
the [ ], in regard to the adjusting items to be adjusted for both L
and R channels.
and R channels.
• Set the Hi-Fi sound switch in the menu display to “STEREO”
position unless specified otherwise.
Note :
1) When inputting the audio signal, input same signal to both the L and R
channels, unless otherwise.
2) Be sure insert the plug (Shorting plug or dummy plug, etc) into the
AUDIO terminal (Right). If the plug is not inserted, the monaural mode
will be set, and correct adjustments can not be carried out.
will be set, and correct adjustments can not be carried out.
[Monaural mode]
During recording ............... REC AFM RF 1.7MHz carrier will not be
output.
During playback ................ The L + R signal will be output from the
AUDIO terminal (Left).
[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. 5-3-19, and
perform adjustments at the power switch [VTR or PLAYER]
position.
video system measuring instruments as shown in Fig. 5-3-19, and
perform adjustments at the power switch [VTR or PLAYER]
position.
[Adjustment Procedure]
1)
1.5MHz deviation adjustment
2)
1.7MHz deviation adjustment
3)
BPF adjustment
Pattern generator
Video output
(75
Ω
)
Audio
oscillator
oscillator
Attenuator
600
Ω
600
Ω
(270
Ω
(1-249-410-11) +330
Ω
(1-249-411-11))
Main unit
Main unit
VIDEO
VIDEO
AUDIO
AUDIO
L
R
L
R
L
R
In Recording
In Playback
47k
Ω
47k
Ω
:1-249-437-11
47k
Ω
:1-249-437-11
Audio level meter or
distortion meter
distortion meter
TV monitor
When connecting AFM DEV jig.
Oscilloscope
TP27
(GND)
(GND)
TP28(DC)
CH1
B
INV
A
SIN
8 0 !¡
AFM DEV jig
(J-6082-312-A)
(J-6082-312-A)
TP33(GND)
TP32(R OUT 1)
TP32(R OUT 1)
B
TP31(L OUT 1)
A
TP29(L OUT 2)
TP30(R OUT 2)
S2
S1
S3
PAL
NT
ST
BIL
J1(R)
J2(L)
J3
TP2(R OUT)
B
TP3(L OUT)
A
TP1(GND)
TP26
TP24
TP25
CN2
CH2
CN1
Use the CPC-7 jig
(J-6082-382-A)
(J-6082-382-A)
Red
Red
White
CN910
VC-214 board
GND
REC RF
RF SWP
A
:1.5MHz deviation adjustment.
B
:1.7MHz deviation adjustment.
To Audio terminal
White
+
–
–
Stabilized power supply
(+7Vdc to +9Vdc)
Fig. 5-3-19.
5-45
A
Approx. 2msec
A
Approx. 2msec
Fig. 5-3-20.
Fig. 5-3-21.
1. 1.5 MHz Deviation Adjustment (VC-214 board)
Sets the spectrum of the L-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.
during 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 TP31
CH2: AFM DEV jig TP3
CH2: AFM DEV jig TP3
Measuring Instrument
Oscilloscope
ADD mode
CH2 INV mode
CH2 INV mode
Adjustment Page
F
Adjustment Address
62
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 ........................... SIN Position
S2 ........................... PAL Position
S3 ........................... SIN 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)
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 INV
(invert) mode.
(invert) mode.
3)
Select page: 0, address: 01, and set data: 01.
4)
Select page: F, address: 62, 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: 0, address: 01, and set data: 00.
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)
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: 0, address: 01, and set data: 00.
5-46
3. BPF f0 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”.
