Sony DCR-TRV230E Service Manual page 185

3-3. SERVO AND RF SYSTEM ADJUSTMENT
Before perform the servo and RF system adjustments, check that
the specified value of "36MHz Origin Oscillation Adjustment" of
"VIDEO SYSTEM ADJUSTMENT" is satisfied.
Adjusting Procedure:
1. REEL FG adjustment
2. PLL fo & LPF fo pre-adjustment
3. Switching position adjustment
4. AGC center level and APC & AEQ adjustment
5. PLL fo & LPF fo fine adjustment
6. Hi8/Standrd8 switching position adjustment
7. CAP FG offset adjustment
1. REEL FG Adjustment (VC-254 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
1
2 0 01 01
3 3 01 1C
4 3 02
5 3 03
6 0 01 00
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 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
Procedure
Close the cassette compartment
without inserting a cassette.
Set the data.
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)
Set the data.
2. PLL fo & LPF fo Pre-Adjustment (VC-254 board)
Mode
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Adjusting method:
Order Page Address Data
1 0 01
2 3 01
3 3 01
4 3 02
5 3 03
6 0 01
Note: If it isn't satisfied, select page: C, address: 21, set the following
data, and press the PAUSE button, and repeat steps 2 to 4.
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"
If bit2, bit3, bit4, bit5 or bit6 of page: 3, address: 03 data 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
5-44
VTR stop
Display data of page: 3, address: 03
Adjustment remote commander
C
1F, 20, 22, 29
The data of page: 3, address: 02 is "00".
The data of page: 3, address: 03 is "00".
Procedure
01 Set the data.
00 Set the data, and press PAUSE
button.
30 Set the data, and press PAUSE
button.
Check that the data changes to
"00" within 10 sec. (Note)
Check that the data is "00". (Note)
00 Set the data.
Setting data
D2
C2
Error contents
PLL fo fine adjustment is defective
PLL fo adjustment is defective
LPF fo is defective