Sony GV-D200 Service Manual ▷ View online
5-19
2. Battery End Adjustment
Set the battery end voltage.
If the voltage is incorrect, the life of the battery will shorten.
The image at the battery end will also be rough.
If the voltage is incorrect, the life of the battery will shorten.
The image at the battery end will also be rough.
Mode
Playback
Signal
Arbitrary
Measurement Point
Display data of page: 2, address: 5D
Measuring Instrument
Adjustment remote commander
Adjustment Page
D
Adjustment Address
48, 49
Connection:
1)
1)
Connect the regulated power supply and the digital voltmeter
to the battery terminal as shown in Fig. 5-3-4.
to the battery terminal as shown in Fig. 5-3-4.
Preparations before adjustments:
1)
1)
Adjust the output voltage of the regulated power supply so that
the digital voltmeter display is 6.1 ± 0.1Vdc.
the digital voltmeter display is 6.1 ± 0.1Vdc.
2)
Turn off the power supply.
3)
Turn on the HOLD switch of the adjustment remote commander.
4)
Turn on the power supply.
5)
Load a cassette, and set to the playback mode.
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
Decrease the output voltage of
the regulated power supply so
that the digital voltmeter display
is 5.30 ± 0.01Vdc.
the regulated power supply so
that the digital voltmeter display
is 5.30 ± 0.01Vdc.
3
2
5D
Read the data, and this data is
named Dref.
named Dref.
4
D
48
Dref
Set the data, and press PAUSE button.
5
Convert Dref to decimal notation,
and obtain Dref’. (Note1)
and obtain Dref’. (Note1)
6
Calculate D
49
’ using following
equation. (decimal calculation)
D
D
49
’=Dref’+8
7
Convert D
49
’ to decimal notation,
and obtain D
49
. (Note1)
8
D
49
D
49
Set the data, and press PAUSE button.
9
0
01
00
Set the data.
Note 1:
Refer to Table 5-4-1. “Hexadecimal-decimal conversion table” of
“5-4.Service mode”.
“5-4.Service mode”.
Fig. 5-3-4.
Digital voltmeter
Regulated power supply
5.30
±
0.01V
Battery terminal
Main unit
5-20
3-4.
SERVO AND RF SYSTEM ADJUSTMENT
Before perform the servo and RF system adjustments, check that
the specified value of “27MHz Origin Oscillation Adjustment” of
“VIDEO SYSTEM ADJUSTMENT” is satisfied.
the specified value of “27MHz Origin Oscillation Adjustment” of
“VIDEO SYSTEM ADJUSTMENT” is satisfied.
Adjusting Procedure:
1.
1.
REEL FG adjustment
2.
PLL fo & LPF fo pre-adjustment
3.
Switching position adjustment
4.
AGC center level
5.
APC & AEQ adjustment
6.
PLL fo & LPF fo final adjustment
7.
Hi8/Standrd8 switching position adjustment
8.
Cap FG duty adjustment
1. REEL FG Adjustment (VC-250 Board)
Compensates the dispersion of the hall elements.
Measurement Point
Display data of page: 3, address: 03
Measuring Instrument
Adjustment remote commander
Adjustment Page
C
Adjustment Address
17, 30
Specified Value
00 or 01 or 04 or 05
Adjusting method:
Order Page Address Data
Procedure
1
Close the cassette compartment
without inserting a cassette.
without inserting a cassette.
2
0
01
01
Set the data.
3
3
01
1C
Set the data, and press PAUSE
button.
button.
4
3
02
Check that the data changes to
“00”,
“00”,
5
3
03
Check that the data is “00” or
“01” or “04” or “05”. (Note)
“01” or “04” or “05”. (Note)
6
0
01
00
Set the data.
Note:
If the data is other value, adjustment has errors. (Take an appropriate
remedial measures according to the errors referring to the following
table.)
remedial measures according to the errors referring to the following
table.)
Data
Contents of defect
02, 03, 06, 07
T reel is defective
08, 09, 0C, 0D
S reel is defective
0A, 0B, 0E, 0F
S reel and T reel are defective
2. PLL fo & LPF fo Pre-Adjustment (VC-250 Board)
Mode
VTR stop
Measurement Point
Display data of page: 3, address: 03
Measuring Instrument
Adjustment remote commander
Adjustment Page
C
Adjustment Address
1F, 20, 22, 29
Specified Value
Bit2, bit3 and bit6 are “0”
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
3
01
30
Set the data, and press PAUSE
button.
button.
3
3
02
Check that the data changes to
“00”.
“00”.
4
3
03
Check that bit2, bit3 and bit6 are
“0”. (Note)
“0”. (Note)
5
0
01
00
Set the data.
Note:
If bit2, bit3 or bit6 is “1”, there are errors.
For the error contents, see the following table. (For the bit values, refer
to “5-4. SERVICE MODE”, “4-3. 3. Bit value discrimination”. )
For the error contents, see the following table. (For the bit values, refer
to “5-4. SERVICE MODE”, “4-3. 3. Bit value discrimination”. )
Bit value of page: 3,
Error contents
address: 03 data
bit 2 = 1
PLL fo final adjustment is defective
bit 3 = 1
PLL fo final adjustment is defective
bit 6 = 1
LPF fo is defective
If bit 2 or bit 3 is “1”, select page: C, address: 21, set the following
data, and press the PAUSE button, and repeat steps 2 to 4.
data, and press the PAUSE button, and repeat steps 2 to 4.
Setting data
When the data of page: C, address: 21 is “CA”.
CE
When the data of page: C, address: 21 is “CE”.
C6
When the data of page: C, address: 21 is “C6”.
D2
When the data of page: C, address: 21 is “D2”
C2
5-21
3. Switching Position Adjustment (VC-250 Board)
To obtain normal playback waveform output during the Digital8
playback mode, adjust the switching position.
playback mode, adjust the switching position.
Mode
VTR playback
Signal
SW/OL reference tape (WR5-2D)
Measurement Point
Display data of page: 3, address: 03
Measuring Instrument
Adjustment remote commander
Adjustment Page
C
Adjustment Address
10, 11, 12, 13
Specified Value
00
Adjusting method:
Order Page Address Data
Procedure
1
Insert the SW/OL reference tape
and enter the VTR STOP mode.
and enter the VTR STOP mode.
2
0
01
01
Set the data.
3
3
21
Check that the data is “02”.
(Note1)
(Note1)
4
3
01
0D
Set the data, and press PAUSE
button.
button.
5
3
02
Check that the data changes to
“00”.
“00”.
6
3
03
Check that the data is “00”.
(Note2)
(Note2)
7
C
10
Check that the data is other than
“EE”. (Note3)
“EE”. (Note3)
8
0
01
00
Set the data.
Note 1:
If the data of page: 3, address: 21 is “72”, the tape top being played.
After playing the tape for 1 to 2 seconds, perform step 4 and higher.
After playing the tape for 1 to 2 seconds, perform step 4 and higher.
Note 2:
If bit 0 of the data is “1”, the A channel is defective. If bit 1 is “1”,
the B channel is defective. Contents of the defect is written into
page: C, addresses: 10 and 12. See the following table. (For the bit
values, refer to “5-4. SERVICE MODE”, “4-3. 3. Bit value
discrimination”. )
the B channel is defective. Contents of the defect is written into
page: C, addresses: 10 and 12. See the following table. (For the bit
values, refer to “5-4. SERVICE MODE”, “4-3. 3. Bit value
discrimination”. )
Note 3:
If the data is “EE” rewind the tape and repeat steps 1 to 7.
When the A channel is defective
Data of page:C,
Contents of defect
address:10
EE
Writing into EEPROM (IC4502) is
defective
defective
E8
Adjustment data is out of range
E7
No data is returned from IC3301
(CAIN)
(CAIN)
When the B channel is defective
Data of page:C,
Contents of defect
address:12
EE
Writing into EEPROM (IC4502) is
defective
defective
E8
Adjustment data is out of range
E7
No data is returned from IC3301
(CAIN)
(CAIN)
4. AGC Center Level and APC & AEQ Adjustment
4-1. Preparations before adjustments
Mode
Recording
Signal
Color bar
Note:
Use a Hi8 MP tape.
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
8
2A
C8
Set the data.
3
Record the color bar signal for
three minutes.
three minutes.
4-2. AGC Center Level Adjustment (VC-250 Board)
Mode
Playback
Signal
Recorded signal at “Preparations
before adjustments”
before adjustments”
Measurement Point
Pin qh of CN933 (RF MON) (Note 1)
Ext. trigger: Pin qd of CN933 (DV RFSWP)
Ext. trigger: Pin qd of CN933 (DV RFSWP)
Measuring Instrument
Oscilloscope
Adjustment Page
C
Adjustment Address
1E
Specified Value
The data of page: 3, address: 03 is “00”
Note 1:
Connect a 75
Ω
resistor between Pin qh and Pin 6 (GND) of CN933.
75
Ω
resistor (Parts code: 1-247-804-11)
Adjusting method:
Order Page Address Data
Procedure
1
Playback the recorded signal at
“Preparations before adjustments”
“Preparations before adjustments”
2
0
01
01
Set the data.
3
2
2E
01
Set the data.
4
3
33
08
Set the data.
5
Confirm that the playback RF
signal is stable. (Fig. 5-3-5.)
signal is stable. (Fig. 5-3-5.)
6
3
01
23
Set the data, and press PAUSE button.
7
3
02
Check that the data is “00”.
8
3
03
Check that the data is “00”.
(Note2)
(Note2)
9
Perform “APC & AEQ Adjustment”.
Note 2:
If the data of page: 3, address: 03 is other than “00”, adjustment
has errors.
has errors.
13.3 msec
PB RF signal is stable
Pin
qd
Pin
qh
Fig. 5-3-5.
5-22
4-3. APC & AEQ Adjustment (VC-250 Board)
Mode
Playback
Signal
Recorded signal at “Preparations
before adjustments”
before adjustments”
Measurement Point
Pin qh of CN933 (RF MON) (Note 1)
Ext. trigger: Pin qd of CN933 (DV RF
SWP)
Ext. trigger: Pin qd of CN933 (DV RF
SWP)
Measuring Instrument
Oscilloscope
Adjustment Page
C
Adjustment Address
18, 19, 1B, 1C, 21, 2C
Specified Value
The data of page: 3, address: 03 is “00”
Note 1:
Connect a 75
Ω
resistor between Pin qh and Pin 6 (GND) of
CN933.
75
75
Ω
resistor (Parts code: 1-247-804-11)
Note 2:
The “AGC Center Level Adjustment” must have already been
completed before starting this adjustment.
completed before starting this adjustment.
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
C
18
25
Set the data, and press PAUSE button.
3
C
19
25
Set the data, and press PAUSE button.
4
C
1B
25
Set the data, and press PAUSE button.
5
C
1C
25
Set the data, and press PAUSE button.
6
C
21
CA
Set the data, and press PAUSE button.
7
C
2C
03
Set the data, and press PAUSE button.
8
Playback the recorded signal at
“Preparations before adjustments”
“Preparations before adjustments”
9
2
2E
01
10
3
33
08
Set the data.
11
Confirm that the playback RF
signal is stable. (Fig. 5-3-6.)
signal is stable. (Fig. 5-3-6.)
12
3
01
07
Set the data, and press PAUSE button.
13
3
02
Check that the data changes from
“07” to “00” in about 20 seconds
after pressing PAUSE button.
“07” to “00” in about 20 seconds
after pressing PAUSE button.
14
3
03
Check that the data is “00”.
(Note3)
(Note3)
15
Perform “Processing after
Completing Adjustments”.
Completing Adjustments”.
Note 3:
If the data is other than “00”, adjustment has errors.
4-4. Processing after Completing Adjustments
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
2
2E
00
Set the data.
3
3
33
00
Set the data.
4
8
2A
00
Set the data, and press PAUSE
button.
button.
5
0
01
00
Set the data.
Fig. 5-3-6.
13.3 msec
PB RF signal is stable
Pin
qd
Pin
qh
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