DOWNLOAD Sony DCR-TRV238E / DCR-TRV239E (serv.man2) Service Manual ↓ Size: 5.44 MB | Pages: 127 in PDF or view online for FREE

Model
DCR-TRV238E DCR-TRV239E (serv.man2)
Pages
127
Size
5.44 MB
Type
PDF
Document
Service Manual
Brand
Device
Movie / LEVEL 2
File
dcr-trv238e-dcr-trv239e-sm2.pdf
Date

Sony DCR-TRV238E / DCR-TRV239E (serv.man2) Service Manual ▷ View online

5-43
DCR-TRV238E/TRV239E
4-3. APC & AEQ Adjustment (VC-276 board)
Mode
Playback
Signal
Recorded signal at “Preparations
before adjustments”
Measurement Point
Pin qh of CN1108 (RF MON) (Note 1)
Ext. trigger: Pin qd of CN1108 (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
 resistor between Pin qh and Pin w; (GND) of
CN1108.
75
 resistor (Parts code: 1-247-804-11)
Note 2:
The  “AGC Center Level Adjustment” must have already been
completed before starting this adjustment.
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
C
18
20
Set the data, and press PAUSE
button.
3
C
19
20
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”
9
2
4D
40
Set the data.
10
3
33
08
Set the data.
11
Confirm that the playback RF
signal is stable. (Fig. 5-3-4.)
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.
14
3
03
Check that the data is “00”.
(Note3)
15
Perform “Processing after
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
4D
00
Set the data.
3
3
33
00
Set the data.
4
8
21
00
Set the data, and press PAUSE
button.
5
0
01
00
Set the data.
Fig. 5-3-4.
13.3 msec 
PB RF signal is stable
Pin 
qd
Pin 
qh
5-44
DCR-TRV238E/TRV239E
5. PLL f
0
 & LPF f
0
 Fine Adjustment (VC-276 board)
Mode
VTR stop
Signal
Arbitrary
Measurement Point
Display data of page: 3, address: 02, 03
Measuring Instrument
Adjustment remote commander
Adjustment Page
C
Adjustment Address
1F, 20, 22, 29
Specified Value
Display data of page: 3, address: 02 is
“00”.
Display data of page: 3, address: 03 is
“00”.
Note1:
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
3
01
30
Set the data, and press PAUSE
button.
3
3
02
Check that the data changes to
“00” with in 10 sec. (Note2)
4
3
03
Check that the data is “00”.
(Note3)
5
0
01
00
Set the data.
Note2:
If it isn’t satisfied, there are errors.
Note3:
If the data of page: 3, address: 03 is other than “00”, 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”.)
6. Hi8/Standard8 Switching Position Adjustment
(VC-276 board)
If deviated in this case causes switching noise or jitter on the Hi8/
Standard8 mode played back screen.
Mode
Playback
Signal
Hi8/Standard8 alignment tape:
  For tracking adjustment (WR5-1CP)
Measurement Point
CH1: Pin 8 of CN1108 (RF SWP)
CH2: Pin 5 of CN1108 (PB RF)
Measuring Instrument
Oscilloscope
Adjustment Page
C
Adjustment Address
40, 41
Specified Value
t1 = 0 ± 10 
µ
sec
Note:
The data of page: 0, address: 10 must be “00”.
Adjusting Method:
Order Page Address Data
Procedure
1
Set to the stop mode.
2
0
01
01
Set the data.
3
C
3E
40
Set the data, and press PAUSE
button.
4
2
4D
80
Set the data.
5
Set to the playback mode.
6
C
40
Change the data and minimize
“t1”. (Coarse adjustment)
7
C
40
Press PAUSE button
8
C
41
Change the data and adjust so that
the switching position (t1)
becomes the specified value. (Fine
adjustment)
9
C
41
Press PAUSE button
10
C
3E
00
Set the data, and press PAUSE
button.
11
2
4D
00
Set the data.
12
0
01
00
Set the data.
Fig. 5-3-5.
CH1
CH2
Enlargement
t1=0 
±
 10 
µ
sec
CH1
CH2
Bit value of page: 3,
Error contents
address: 03
bit 2 = 1 or bit 3 = 1
PLL f
0
 fine adjustment is defective
bit 4 = 1 or bit 5 = 1
PLL f
0
 adjustment is defective
bit 6 = 1
LPF f
0
 adjustment is defective
5-45
DCR-TRV238E/TRV239E
7. CAP FG Duty Adjustment (VC-276 board)
Set the Cap FG signal duty cycle to 50% to establish an appropriate
capstan servo. If deviated, the uneven rotation of capstan and noise
can occur in the Hi8/Standard8 LP mode.
Mode
Playback
Signal
Hi8/standard 8 alignment tape :
For checking operation
(WR5-5CSP)
Measurement Point
Pin qg of CN1108 (CAP FG)
Measuring Instrument
Oscilloscope
Adjustment Page
C
Adjustment Address
16
Specified value
Duty = 50 ± 1 %
Note1:
The data of page: 0, address: 10 must be “00”.
Adjusting method:
Order Page Address Data
Procedure
1
Set to the playback mode.
2
0
01
01
Set the data.
3
3
01
00
Set the data, and press PAUSE
button.
4
3
01
81
Set the data, and press PAUSE
button.
5
3
02
Check that the data changes from
“81” to “00”.
6
3
03
Check that the data is “00”.
(Note2)
7
Check that Duty of CAP FG signal
satisfies the specified value. If not,
repeat steps 3 to 7.
8
0
01
00
Set the data.
Note2:
If the data of page: 3, address: 03 is other than “00”, 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”.)
Bit value of page: 3,
Error contents
address: 03
bit 0 = 1
Adjustment time-out
bit 1 = 1
Hi8/Standard8 mode wasn’t set up.
Fig. 5-3-6.
A
B
Duty = A/B 
×
 100 [%] 
Center of movement 
5-46
DCR-TRV238E/TRV239E
3-4.
VIDEO SYSTEM ADJUSTMENTS
Note:
Before performing the adjustments, check the data of page: 0,
address: 10 is “00”. If not, set data: 00 to this address.
1. 36MHz Origin Oscillation Adjustment
(VC-276 board)
Set the frequency of the clock for synchronization.
If deviated, the synchronization will be disrupted and the color will
become inconsistent.
Mode
Camera
Subject
Not required
Measurement Point
Pin qh of IC1502
Measuring Instrument
Frequency counter
Adjustment Page
F
Adjustment Address
12
Specified Value
f = 18000000 ± 90Hz
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
F
12
Change the data and set the
frequency (f) to the specified
value.
3
F
12
Press PAUSE button.
4
0
01
00
Set the data.
2. S VIDEO OUT Y Level Adjustment (VC-276 board)
Mode
VTR stop
Signal
No signal
Measurement Point
Y signal terminal of S VIDEO jack
(75
 terminated)
Measuring Instrument
Oscilloscope
Adjustment Page
C
Adjustment Address
25
Specified Value
A = 1000 ± 20mV
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
D
FE
10
Set the data, and press PAUSE
button.
3
3
0C
02
Set the data, and press PAUSE
button.
4
C
25
Change the data and set the Y
signal level (A) to the specified
value.
5
C
25
Press PAUSE button.
6
3
0C
00
Set the data, and press PAUSE
button.
7
D
FE
00
Set the data, and press PAUSE
button.
8
0
01
00
Set the data.
VC-276 board
IC1502
25
36
12
24 13
37 48
1
Fig. 5-3-7.
H
Center of luminance line
A
Page of 127
Display

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