Sony GV-D200 Service Manual ▷ View online
5-31
3-7.
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. 5-3-18.
Connect the audio system measuring instruments in addition to the
video system measuring instruments as shown in Fig. 5-3-18.
[Adjustment Procedure]
1)
1)
Hi8/Standard8 AFM BPF fo adjustment
2)
Hi8/Standard8 AFM 1.5MHz deviation adjustment
3)
Hi8/Standard8 AFM 1.7MHz deviation adjustment
4)
Digital8 playback level check
5)
Overall level characteristics check
6)
Overall distortion check
7)
Overall noise level check
8)
Overall separation check
1. Hi8/Standard8 AFM BPF fo Adjustment
(VC-250 board)
Sets the BPF passing frequency of IC760 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.
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.
Mode
Playback
Signal
Hi8/Standard8 alignment tape:
For BPF adjustment
(WR5-11NS (NTSC))
(WR5-11CS (PAL))
For BPF adjustment
(WR5-11NS (NTSC))
(WR5-11CS (PAL))
Measurement Point
AUDIO OUT jack LEFT or RIGHT
Measuring Instrument
Distortion meter
Adjustment Page
F
Adjustment Address
7D
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: 7D, change the data and minimize the
distortion rate.
distortion rate.
4)
Press the PAUSE button.
5)
Set the Hi-Fi SOUND switch (menu display) to “1”.
6)
Select page: F, address: 7D, change the data and minimize the
distortion rate.
distortion rate.
7)
Press the PAUSE button.
8)
Repeat steps 2) to 7) and set the data of address: 7D 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.
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”.
Fig. 5-3-18.
VIDEO OUT
(75
Ω
)
Pattern generator
AUDIO/VIDEO
INPUT
Main Unit
Audio generator
Attenuator
600
Ω
600
Ω
: 270
Ω
(1-249-410-11) + 330
Ω
(1-249-411-11)
AUDIO
LEFT
(White)
LEFT
(White)
AUDIO
RIGHT
(RED)
RIGHT
(RED)
VIDEO
(Yellow)
(Yellow)
Recording
L
R
AUDIO OUT
VIDEO OUT
Main unit
Monitor TV
47k
Ω
47k
Ω
47k
Ω
(1-249-437-11)
Audio level meter
or distortion meter
Playback
5-32
2. Hi8/Standard8 AFM 1.5 MHz Deviation Adjustment
(VC-250 board)
Adjust to the optimum 1.5MHz audio FM signal deviation.
If the adjustment is not correct, its playback level will differ from
that of other units.
If the adjustment is not correct, its playback level will differ from
that of other units.
Mode
Playback
Signal
Hi8/Standard8 alignment tape:
For checking AFM stereo operation
Monoscope section
(WR5-9NS (NTSC))
(WR5-9CS (PAL))
For checking AFM stereo operation
Monoscope section
(WR5-9NS (NTSC))
(WR5-9CS (PAL))
Measurement Point
AUDIO OUT jack LEFT or RIGHT
Measuring Instrument
Audio level meter
Adjustment Page
F
Adjustment Address
7B
Specified Value
–7.5 ± 2.0dBs
Adjusting method:
1)
1)
Select page: 0, address: 01, and set data: 01.
2)
Set the Hi-Fi SOUND switch (menu display) to “1”.
3)
Select page: F, address: 7B, change the data and set the 400Hz
signal level to the specified value.
signal level to the specified value.
4)
Press the PAUSE button.
5)
Set the Hi-Fi SOUND switch (menu display) to “STEREO”.
6)
Select page: 0, address: 01, and set data: 00.
3. Hi8/Standard8 AFM 1.7 MHz Deviation Adjustment
(VC-250 board)
Adjust to the optimum 1.7MHz audio FM signal deviation.
If improper, this causes deteriorated separation (with stereo signal).
If improper, this causes deteriorated separation (with stereo signal).
Mode
Playback
Signal
Hi8/Standard8 alignment tape:
For checking AFM stereo operation
Monoscope section
(WR5-9NS (NTSC))
(WR5-9CS (PAL))
For checking AFM stereo operation
Monoscope section
(WR5-9NS (NTSC))
(WR5-9CS (PAL))
Measurement Point
AUDIO OUT jack LEFT or RIGHT
Measuring Instrument
Oscilloscope
Adjustment Page
F
Adjustment Address
7C
Specified Value
–7.5 ± 2.0dBs
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: 7C, change the data and set the 1kHz
signal level to the specified value.
signal level to the specified value.
4)
Press the PAUSE button.
5)
Set the Hi-Fi SOUND switch (menu display) to “STEREO”.
6)
Select page: 0, address: 01, and set data: 00.
4. Digital8 Playback Level Check
Mode
Playback
Signal
Digital8 alignment tape:
For audio operation check
(WR5-3ND (NTSC))
(WR5-3CD (PAL))
For audio operation check
(WR5-3ND (NTSC))
(WR5-3CD (PAL))
Measurement Point
AUDIO OUT jack LEFT or RIGHT
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.
5. Overall Level Characteristics Check
Mode
Recording and playback
Signal
400Hz, –7.5dBs signal: Audio
terminal left and right of AUDIO/
VIDEO INPUT jack
terminal left and right of AUDIO/
VIDEO INPUT jack
Measurement Point
AUDIO OUT jack LEFT or RIGHT
Measuring Instrument
Audio level meter
Specified Value
–7.5 ± 3.0dBs
Checking Method:
1)
1)
Input the 400Hz, –7.5dBs signal in the audio terminal left and
right of AUDIO/VIDEO INPUT jack.
right of AUDIO/VIDEO INPUT jack.
2)
Record the signal.
3)
Playback the recorded section.
4)
Check that the 400Hz signal level is the specified value.
6. Overall Distortion Check
Mode
Recording and playback
Signal
400Hz, –7.5dBs signal: Audio
terminal left and right of AUDIO/
VIDEO INPUT jack
terminal left and right of AUDIO/
VIDEO INPUT jack
Measurement Point
AUDIO OUT jack LEFT or RIGHT
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, –7.5dBs signal in the audio terminal left and
right of AUDIO/VIDEO INPUT jack.
right of AUDIO/VIDEO INPUT jack.
2)
Record the signal.
3)
Playback the recorded section.
4)
Check that the distortion is the specified value.
5-33
7. Overall Noise Level Check
Mode
Recording and playback
Signal
No signal: Audio terminal left and
right of AUDIO/VIDEO INPUT jack
right of AUDIO/VIDEO INPUT jack
Measurement Point
AUDIO OUT jack LEFT or RIGHT
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)
Connect the audio terminal left of AUDIO/VIDEO INPUT jack
and its ground terminal with a jumper wire.
and its ground terminal with a jumper wire.
2)
Connect the audio terminal right of AUDIO/VIDEO INPUT
jack and its ground terminal with a jumper wire.
jack and its ground terminal with a jumper wire.
3)
Record the signal.
4)
Playback the recorded section.
5)
Check that the noise level is the specified value.
6)
Remove the jumper wires.
8. Overall Separation Check
Mode
Recording and playback
Signal
No signal: Audio terminal <left>
[right] of AUDIO/VIDEO INPUT
jack
400Hz, –7.5dBs signal: Audio
terminal <right> [left] of AUDIO/
VIDEO INPUT jack
[right] of AUDIO/VIDEO INPUT
jack
400Hz, –7.5dBs signal: Audio
terminal <right> [left] of AUDIO/
VIDEO INPUT jack
Measurement Point
AUDIO OUT jack <LEFT> [RIGHT]
Measuring Instrument
Audio level meter
Specified Value
Below –40dBs
< > : Left channel check
[ ] : Right channel check
[ ] : Right channel check
Checking Method:
1)
1)
Connect the audio terminal <left> [right] of AUDIO/VIDEO
INPUT jack and its ground terminal with a jumper wire.
INPUT jack and its ground terminal with a jumper wire.
2)
Input the 400Hz, –7.5dBs signal in the audio terminal <right>
[left] of AUDIO/VIDEO INPUT jack.
[left] of AUDIO/VIDEO INPUT jack.
3)
Record the signal.
4)
Playback the recorded section.
5)
Check that the signal level of the AUDIO OUT <LEFT>
[RIGHT] jack is the specified value.
[RIGHT] jack is the specified value.
6)
Remove the jumper wires.
5-34
3-8.
LCD SYSTEM ADJUSTMENT
(GV-D800/D800E)
(GV-D800/D800E)
Note 1:
The back light (fluorescent tube) is driven by a high voltage AC
power supply. Therefore, do not touch the back light holder to
avoid electrical shock.
power supply. Therefore, do not touch the back light holder to
avoid electrical shock.
Note 2:
When replacing the LCD unit, be careful to prevent damages
caused by static electricity.
caused by static electricity.
Note 3:
Set the LCD BRIGHT to the center.
Set the LCD COLOR (Menu display) to the center.
Set the LCD COLOR (Menu display) to the center.
[Adjusting connector]
Most of the measuring points for adjusting the LCD system are
concentrated in CN5502 of the PD-130 board. Connect the
measuring instruments via the multi CPC jig (J-6082-311-A). The
following table shows the Pin No. and signal name of CN5502.
Most of the measuring points for adjusting the LCD system are
concentrated in CN5502 of the PD-130 board. Connect the
measuring instruments via the multi CPC jig (J-6082-311-A). The
following table shows the Pin No. and signal name of CN5502.
1. LCD Initial Data Input (1)
Mode
VTR stop
Signal
No signal
Adjustment Page
C
Adjustment Address
AB to BA
Adjusting method:
1)
1)
Select page: 0, address: 01, and set data: 01.
2)
Select page: C, and input the data in the following table.
Note:
To write in the non-volatile memory (EEPROM), press the
PAUSE button of the adjustment remote commander each time
to set the data.
PAUSE button of the adjustment remote commander each time
to set the data.
3)
Select page: 0, address: 01, and set data: 00.
Pin No.
1
3
5
7
9
Signal Name
VB
VG
VR
C SYNC/HD
GND
Pin No.
2
4
6
8
10
Signal Name
XVD OUT
PANEL COM
SH/CA
XHD OUT
GND
Table. 5-3-11.
Address
AB
AC
AD
AE
AF
B0
B1
B2
B3
B4
B5
B6
B7
B8
B9
BA
Data
53
00
90
CB
6C
2C
00
00
20
0A
24
1A
0F
17
21
23
Remark
Fixed data
Fixed data
Fixed data
Fixed data
Fixed data
Fixed data
Fixed data
Fixed data
Fixed data
Fixed data
Fixed data
Fixed data
Fixed data
Fixed data
Fixed data
Fixed data
Table. 5-3-12.
Fig. 5-3-19.
PD-130 board
CN5502
1
9
2 10
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