Apc & Aeq Adjustment (Vc-235 Board); Pll F & Lpf F - Sony DCR-TRV820 Service Manual

5. APC & AEQ Adjustment (VC-235 board)
Mode Camera record and playback
Subject Arbitrary
Pin qh of CN259 (RF MON) on
FU-141 board
Measurement Point
(Note 1)
External trigger : Pin qd of CN259
(DV RF SWP) on FU-141 board
Measuring Instrument Oscilloscope
Adjustment Page C
Adjustment Address 18, 19, 1B, 1C, 21, 2C
Specified Value The display data of page: 3, address:
03 is "00"
Note 1: Connect a 75 Ω resistor between Pin qh and Pin 6 (GND)
of CN259.
75 Ω resistor (Parts code: 1-247-804-11)
Note 2: Use a Hi8 MP tape.
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 8, address: 2A, set data: C8, and press the PAUSE
button of the adjustment remote commander.
3) Record the camera signal for a minute.
4) Select page: 2, address: 2E, and set data: 01.
5) Playback the recorded segment.
6) Select page: 3, address: 33, and set data: 08.
7) Confirm that the playback RF signal is stable.
8) Select page: 3, address: 01, set data: 07, and press the PAUSE
button.
9) Select page: 3, address: 02, and check that the data changes
from "07" to "00" in about 20 seconds after pressing the
PAUSE button.
10) Select page: 3, address: 03, and check that the data is "00".
Note 3: If the data of page: 3, address: 03 is other than "00",
adjustment has errors.
11) Select page: 3, address: 33, and set data: 00.
12) Select page: 2, address: 2E, and set data: 00.
13) Select page: 8, address: 2A, set data: 00, and press the PAUSE
button.
14) Select page: 0, address: 01, and set data: 00.
PB RF signal is stable
Pin qh
Pin qd
Fig. 5-3-6
13.3 msec
6. PLL f & LPF f Final Adjustment (VC-235 board)
0 0
Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 3, address: 01, set data: 30, and press the PAUSE
button of the adjustment remote commander.
3) Select page: 3, address: 02, and check that the data changes to
"00".
4) Select page: 3, address: 03, and check that bit values of bit2,
bit3 and bit6 are "0".
Note: If bit value of bit 2, bit 3 or bit 6 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
bit 6 = 1
bit 3 = 1
bit 2 = 1
5) Select page: 0, address: 01, and set data: 00.
5-46
VTR stop
Arbitrary
Display data of page: 3, address: 03
Adjustment remote commander
C
1F, 20, 22, 29
Bit values of bit2, bit3 and bit6 are
"0"
Error contents
LPF f adjustment is defective
0
PLL f , fine adjustment is defective
0
PLL f , fine adjustment is defective
0