Video Out Y, Chroma Level Check (Vc-235 Board); Hi8/Standard 8 Mm Afc F Adjustment (Vc-235 Board) (Using Digital Voltmeter); Hi8/Standard 8 Mm Afc F Adjustment (Vc-235 Board) (Auto Adjustment) - Sony DCR-TRV820 Service Manual

5. VIDEO OUT Y, Chroma Level Check (VC-235 board)

Mode VTR stop
Subject Arbitrary
Measurement Point VIDEO jack (75 terminated)
Measuring Instrument Oscilloscope
Sync level: A=286 ± 18 mV (NTSC)
Specified Value
Burst level: B=286 ± 18 mV (NTSC)
Adjusting method:
1) Select page: 0, address: 01, set data: 01.
2) Select page: D, address: 11, set data: 10, and press the PAUSE
button of the adjustment remote commander.
3) Select page: 3, address: 0C, set data: 02, and press the PAUSE
button.
4) Check that the sync signal level (A) satisfies the specified value.
5) Check that the burst signal level (B) satisfies the specified
value.
6) Select page: 3, address: 0C, set data: 00, and press the PAUSE
button.
7) Select page: D, address: 11, set data: 00, and press the PAUSE
button.
8) Select page: 0, address: 01, set data: 00.
A
Fig. 5-3-13
A=307 ± 18 mV (PAL)
B=300 ± 18 mV (PAL)
H
6. Hi8/standard 8 mm AFC f
(VC-235 board)
(Using Digital Voltmeter)
Adjust the pull-in range of the clock generator (IC2201) for A/D
conversion during Hi8/standard 8 mm playback.
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: 0D, set data: 04, and press the PAUSE
button of the adjustment remote commander.
3) Select page: 6, address: 63, set data: 04.
4) Select page: 6, address: 6F, set data: 01.
5) Select page: F, address: 65, change the data and set the DC
voltage (A) to the specified value.
6) Press the PAUSE button.
7) Select page: 3, address: 0D, set data: 00, and press the PAUSE
button.
8) Select page: 6, address: 63, set data: 00.
9) Select page: 6, address: 6F, set data: 00.
10) Select page: 0, address: 01, and set data: 00.
7. Hi8/standard 8 mm AFC f
(VC-235 board)
(Auto Adjustment)
B
Adjust the pull-in range of the clock generator (IC2201) for A/D
conversion during Hi8/standard 8 mm playback.
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: 0D, set data: 04, and press the PAUSE
button of the adjustment remote commander.
3) Select page: 6, address: 63, set data: 04.
4) Select page: 6, address: 6F, set data: 01.
5) Select page: 6, address: 01, set data: C5, and press the PAUSE
button.
6) Select page: 6, address: 02, and check that the data is "01".
7) Select page: 6, address: 6E, and check that the display data
satisfies the specified value.
8) Select page: 3, address: 0D, set data: 00, and press the PAUSE
button.
9) Select page: 6, address: 01, set data: 00, and press the PAUSE
button.
10) Select page: 6, address: 63, set data: 00.
11) Select page: 6, address: 6F, set data: 00.
12) Select page: 0, address: 01, and set data: 00.
5-50
Adjustment
0
VTR stop
No signal
Pin 2 of CN259 (AFC F0) on FU-
141 board
Digital voltmeter
F
65
A=2.00 ± 0.05 Vdc
Adjustment
0
VTR stop
No signal
Display data of Page: 6, Address: 6E
Adjustment remote commander
F
65
B2 to BA