Servo And Rf System Adjustment - Sony DCR-TRV240 Service Manual

DCR-TRV240/TRV340
3-3.

SERVO AND RF SYSTEM ADJUSTMENT

Before perform the servo and RF system adjustments, check that
the specified value of "27 MHz Origin Oscillation Adjustment" of
"VIDEO SYSTEM ADJUSTMENT" is satisfied.
And check that the data of page: 0, address: 10 is "00". If not, set
data: 00 to this address.
Adjusting Procedure:
1. REEL FG adjustment
2. PLL f & LPF f adjustment
0 0
3. Switching position adjustment
4. AGC center level and APC & AEQ adjustment
5. PLL f & LPF f fine adjustment
0 0
6. Hi8/Standrd8 switching position adjustment
7. Cap FG duty adjustment
1. REEL FG Adjustment (VC-276 board)
Compensates the dispersion of the hall elements.
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Note: The data of page: 0, address: 10 must be "00".
Adjusting method:
Order Page Address Data
1
2 0 01
3 3 01
4 3 02
5 3 03
6 0 01
Note: If the data is other value, adjustment has errors. (Take an appropriate
remedial measures according to the errors referring to the following
table.)
Data
02, 03, 06, 07
08, 09, 0C, 0D
0A, 0B, 0E, 0F
RadarW RadarW RadarW
Display data of page: 3, address: 03
Adjustment remote commander
C
17, 2F
00 or 01 or 04 or 05
Procedure
Close the cassette compartment
without inserting a cassette.
01 Set the data.
1C Set the data, and press PAUSE
button.
Check that the data changes to
"00",
Check that the data is "00" or "01"
or "04" or "05". (Note)
00 Set the data.
Contents of defect
T reel is defective
S reel is defective
S reel and T reel are defective
2. PLL f & LPF f Adjustment (VC-276 board)
0 0
Mode
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Note1: The data of page: 0, address: 10 must be "00".
Adjusting method:
Order Page Address Data
1 0 01
2 C 21
3 3 01
4 3 01
5 3 02
6 3 03
7 0 01
Note2: If it isn't satisfied, select page: C, address: 21, set the following
data, and press the PAUSE button, and repeat steps 3 to 6.
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".
When the data of page: C, address: 21 is "D2"
There are errors when it isn't satisfied even if the above treatment is
done.
If bit2, bit3, bit4, bit5 or bit 6 of the data of page: 3, address: 03 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".)
Bit value of page: 3,
address: 03 data
bit 2 = 1 or bit 3 = 1
bit 4 = 1 or bit 5 = 1
bit 6 = 1
5-42
VTR stop
Display data of page: 3, address: 02, 03
Adjustment remote commander
C
1F, 20, 22, 29
Data of page: 3, address: 02 is "00".
Data of page: 3, address: 03 is "00".
Procedure
01 Set the data.
CA Set the data, and press PAUSE
button.
00 Set the data, and press PAUSE
button.
30 Set the data, and press PAUSE
button.
Check that the data changes to
"00" with in 10 sec. (Note2)
Check that the data is "00".
(Note2)
00 Set the data.
Setting data
D2
C2
Error contents
PLL f fine adjustment is defective
0
PLL f adjustment is defective
0
LPF f adjustment is defective
0
RadarW RadarW RadarW