Sony DCR-TRV75 / DCR-TRV75E / DCR-TRV80 / DCR-TRV80E (serv.man4) Service Manual ▷ View online
6-42
DCR-TRV75/TRV75E/TRV80/TRV80E
2. RGB AMP Adjustment (PD-192 board)
Set the D range of the RGB decoder used to drive the LCD to the
specified value. If deviated, the LCD screen will become blackish
or saturated (whitish).
specified value. If deviated, the LCD screen will become blackish
or saturated (whitish).
Mode
VTR stop
Signal
No signal
Measurement Point
Pin 9 of CN1004 of VC-316 board
(PANEL VG)
(PANEL VG)
Measuring Instrument
Oscilloscope
Adjustment Page
C
Adjustment Address
4A
Specified Value
A = 3.70 ± 0.05V (NTSC)
A = 3.45 ± 0.05V (PAL)
A = 3.45 ± 0.05V (PAL)
Note:
The data of page: 0, address: 10 must be “00”.
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
C
4A
Change the data and set the
voltage (A) between the
reversed waveform pedestal and
non-reversed waveform pedestal
to the specified value.
voltage (A) between the
reversed waveform pedestal and
non-reversed waveform pedestal
to the specified value.
3
C
4A
Press PAUSE button.
4
0
01
00
Set the data.
5
Perform “Contrast Adjustment”,
“COM AMP Adjustment” and
“V COM Adjustment”.
“COM AMP Adjustment” and
“V COM Adjustment”.
3. Contrast Adjustment (PD-192 board)
Set the level of the VIDEO signal for driving the LCD to the specified
value. If deviated, the screen image will be blackish or saturated
(whitish).
value. If deviated, the screen image will be blackish or saturated
(whitish).
Mode
VTR stop
Signal
No signal
Measurement Point
Pin 9 of CN1004 of VC-316 board
(PANEL VG)
(PANEL VG)
Measuring Instrument
Oscilloscope
Adjustment Page
C
Adjustment Address
4F
Specified Value
A = 3.30 ± 0.05V (NTSC)
A = 3.25 ± 0.05V (PAL)
A = 3.25 ± 0.05V (PAL)
Note:
The data of page: 0, address: 10 must be “00”.
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
C
4F
Change the data and set the
voltage (A) between the 100 IRE
and 0 IRE (pedestal) to the
specified value.
(The data should be “00” to “7F”.)
voltage (A) between the 100 IRE
and 0 IRE (pedestal) to the
specified value.
(The data should be “00” to “7F”.)
3
C
4F
Press PAUSE button.
4
0
01
00
Set the data.
5
Perform “COM AMP
Adjustment” and “V COM
Adjustment”.
Adjustment” and “V COM
Adjustment”.
Pedestal
Pedestal
A
2H
Pedestal
100IRE
A
2H
Fig. 6-1-22.
Fig. 6-1-23.
6-43
DCR-TRV75/TRV75E/TRV80/TRV80E
4. COM AMP Adjustment (PD-192 board)
Set the common electrode drive signal level of LCD to the specified
value.
value.
Mode
VTR stop
Signal
No signal
Measurement Point
Pin 5 of CN1004 of VC-316 board
(PANEL COM)
(PANEL COM)
Measuring Instrument
Oscilloscope
Adjustment Page
C
Adjustment Address
4C
Specified Value
A = 6.00 ± 0.05V
Note:
The data of page: 0, address: 10 must be “00”.
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
C
4C
Change the data and set the
PANEL COM signal level (A) to
the specified value.
PANEL COM signal level (A) to
the specified value.
3
C
4C
Press PAUSE button.
4
0
01
00
Set the data.
5
Perform “V COM Adjustment”.
5. V COM Adjustment (PD-192 board)
Set the DC bias of the common electrode drive signal of LCD to the
specified value.
If deviated, the LCD display will move, producing flicker and
conspicuous vertical lines.
specified value.
If deviated, the LCD display will move, producing flicker and
conspicuous vertical lines.
Mode
VTR stop
Signal
No signal
Measurement Point
Check on LCD display
Measuring Instrument
Adjustment Page
C
Adjustment Address
49
Specified Value
The brightness difference between the
section A and section B is minimum.
section A and section B is minimum.
Note1:
This adjustment should be carried out upon completion of the
following adjustments.
following adjustments.
RGB AMP Adjustment
Contrast Adjustment
COM AMP Adjustment
Contrast Adjustment
COM AMP Adjustment
Note2:
The data of page: 0, address: 10 must be “00”.
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
C
49
Change the data so that the
brightness of the section A and
that of the section B is equal.
brightness of the section A and
that of the section B is equal.
3
C
49
Subtract 8 from the data.
4
C
49
Press PAUSE button.
5
0
01
00
Set the data.
Fig. 6-1-24.
Fig. 6-1-25.
A
2H
A
A
A
A
B
B
B
B
6-44
DCR-TRV75/TRV75E/TRV80/TRV80E
6. White Balance Adjustment (PD-192 board)
Correct the white balance.
If deviated, the reproduction of the LCD screen may degenerate.
If deviated, the reproduction of the LCD screen may degenerate.
Mode
VTR stop
Signal
No signal
Measurement Point
Check on LCD screen
Measuring Instrument
Adjustment Page
C
Adjustment Address
4D, 4E
Specified Value
The LCD screen should not be colored.
Note1:
Check the white balance only when replacing the following parts.
If necessary, adjust them.
1. LCD panel
2. Light induction plate
3. IC5501
If necessary, adjust them.
1. LCD panel
2. Light induction plate
3. IC5501
Note2:
The data of page: 0, address: 10 must be “00”.
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
C
4D
7F
Set the data, and press PAUSE
button.
button.
3
C
4E
87
Set the data, and press PAUSE
button.
button.
4
C
4E
Check that the LCD screen is
not colored. If not colored,
proceed to step 10.
not colored. If not colored,
proceed to step 10.
5
C
4D
Change the data so that the LCD
screen is not colored.
screen is not colored.
6
C
4D
Press PAUSE button.
7
C
4E
Change the data so that the LCD
screen is not colored.
screen is not colored.
8
C
4E
Press PAUSE button.
9
C
4E
If the LCD screen is colored,
repeat steps 5 to 9.
repeat steps 5 to 9.
10
0
01
00
Set the data.
6-45
DCR-TRV75/TRV75E/TRV80/TRV80E
COVER
COVER
6-2. MECHANISM SECTION
ADJUSTMENT
On the mechanism section adjustment
For detail of mechanism section adjustments, checks, and
replacement of mechanism parts, refer to the separate volume “DV
MECHANICAL ADJUSTMENT MANUAL
replacement of mechanism parts, refer to the separate volume “DV
MECHANICAL ADJUSTMENT MANUAL
Z Mechanism ”.
Note1:
The lens block (CD-437 board) must be connected when
performing the adjustments.
performing the adjustments.
Note2:
Before performing the adjustments, check the data of page: 0,
address: 10 is “00”. If not, set data: 00 to this address.
address: 10 is “00”. If not, set data: 00 to this address.
2-1.
HOW TO ENTER RECORD MODE WITHOUT
CASSETTE
CASSETTE
1)
Connect the adjustment remote commander to the LANC jack.
2)
Turn the HOLD switch of the adjustment remote commander
to the ON position.
to the ON position.
3)
Close the cassette compartment without the cassette.
4)
Select page: 3, address: 01, and set data: 0C, and press the
PAUSE button of the adjustment remote commander.
(The mechanism enters the record mode automatically.)
PAUSE button of the adjustment remote commander.
(The mechanism enters the record mode automatically.)
Note:
The function buttons becomes inoperable.
5)
To quit the record mode, select page: 3, address: 01, set data:
00, and press the PAUSE button of the adjustment remote
commander. (Whenever you want to quit the record mode, be
sure to quit following this procedure.)
00, and press the PAUSE button of the adjustment remote
commander. (Whenever you want to quit the record mode, be
sure to quit following this procedure.)
2-2.
HOW TO ENTER PLAYBACK MODE
WITHOUT CASSETTE
WITHOUT CASSETTE
1)
Connect the adjustment remote commander to the LANC jack.
2)
Turn the HOLD switch of the adjustment remote commander
to the ON position.
to the ON position.
3)
Close the cassette compartment without the cassette.
4)
Select page: 3, address: 01, and set data: 0B, and press the
PAUSE button of the adjustment remote commander.
(The mechanism enters the playback mode automatically.)
PAUSE button of the adjustment remote commander.
(The mechanism enters the playback mode automatically.)
Note:
The function buttons becomes inoperable.
5)
To quit the playback mode, select page: 3, address: 01, set data:
00, and press the PAUSE button of the adjustment remote
commander. (Whenever you want to quit the playback mode,
be sure to quit following this procedure.)
00, and press the PAUSE button of the adjustment remote
commander. (Whenever you want to quit the playback mode,
be sure to quit following this procedure.)
2-3.
TAPE PATH ADJUSTMENT
1. Preparation for Adjustment
1)
Clean the tape running side (tape guide, drum, capstan shaft,
pinch roller, etc.).
pinch roller, etc.).
2)
Connect the adjustment remote commander to the LANC jack.
3)
Turn the HOLD switch of the adjustment remote commander
to the ON position.
to the ON position.
4)
Connect an oscilloscope to VC-316 board CN1004 via the CPC-
7 jig (J-6082-382-A).
Channel 1: VC-316 board, CN1004 Pin 2 (Note)
External trigger: VC-316 board, CN1004 Pin 4
7 jig (J-6082-382-A).
Channel 1: VC-316 board, CN1004 Pin 2 (Note)
External trigger: VC-316 board, CN1004 Pin 4
Note:
Connect a 75
Ω
resistor between Pins 2 of CN1004 and 6
(GND).
5)
Playback the alignment tape for tracking. (XH2-1)
6)
Select page: 3, address: 33, and set data: 08.
7)
Select page: 3, address: 26, set data: 31, and press PAUSE
button.
button.
8)
Check that the oscilloscope RF waveform is normal at the
entrance and exit.If not normal, adjust according to the separate
volume “DV MECHANICAL ADJUSTMENT MANUAL
Z Mechanism ”.
entrance and exit.If not normal, adjust according to the separate
volume “DV MECHANICAL ADJUSTMENT MANUAL
Z Mechanism ”.
CN1004 of VC-316 board
Table 6-2-1.
2. Processing after Completing Operations:
1)
Connect the adjustment remote commander to the LANC jack
and set the HOLD switch to the ON position.
and set the HOLD switch to the ON position.
2)
Select page: 3, address: 26, and set data: 00, and press PAUSE
button.
button.
3)
Select page: 3, address: 33, and set data: 00.
Pin No.
1
2
3
4
5
6
7
8
Signal Name
FRRV
RF MON
RF IN/LANC
JACK IN
JACK IN
SWP
PANEL COM
REG_GND
H START
REG_GND
Pin No.
9
10
11
12
13
14
15
16
Signal Name
PANEL VG
REG_GND
EVF VCO
REG_GND
EVF VG
EXT DA
N.C.
N.C.
CH1
CH2
(
(
Trigger)
Envelope must be flat
3.3 msec
Fig. 6-2-1.
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