Clock Adjustment; Ic1900 27Mhz Xtal Fo Adjustment (Rj-74 Board); Ic1900 Vco Operation Check (Rj-74 Board); Ic6101 41.85Mhz Vco Operation Check (Rj-74 Board) - Sony DCR-TRV7 Service Manual

3-4-3. Clock Adjustment

1. IC1900 27MHz XTAL fo Adjustment (RJ-74 Board)

Set the sub-carrier frequency of the video output signal in VTR mode.
Adjusting method:
Mode VTR stop
Signal No signal
R1901 (Pin 2 of IC1900)
Measurement Point
Measuring Instrument Frequency counter
Adjustment Page D
Adjustment Address 98
f = 13500000 ± 68Hz (NTSC)
Specified Value
f = 13500000 ± 68Hz (PAL)
1) Set data: 01 to page: 0, address: 01.
2) Change the data of page: D, address: 98, and set the clock
frequency (f) to the specified value.
3) Press the PAUSE button of the adjusting remote commander.
4) Set data: 00 to page: 0, address: 01.

2. IC1900 VCO Operation Check (RJ-74 Board)

Mode VTR stop
Signal No signal
Display data of page: 2, address: 0E of
Measurement Point
Measuring Instrument the adjusting remote commander
"C0" to "FF"
Specified Value
Checking method:
1) Set data: 01 to page: 0, address: 01.
2) Set data: 02 to page: 2, address: 05 and press the PAUSE button
of the adjusting remote commander.
3) Set data: 03 to page: D, address: B0 and press the PAUSE button
of the adjusting remote commander.
4) Check that the display data of page: 2, address: 0E is "C0" to
"FF".
5) Set data: 05 to page: D, address: B0 and press the PAUSE button
of the adjusting remote commander.
6) Check that the display data of page: 2, address: 0E is "C0" to
"FF".
7) Set data: 00 to page: D, address: B0 and press the PAUSE button
of the adjusting remote commander.
8) Set data: 00 to page: 2, address: 05 and press the PAUSE button
of the adjusting remote commander.
9) Set data: 00 to page: 0, address: 01.

3. IC6101 41.85MHz VCO Operation Check (RJ-74 Board)

Mode Camera recording
Subject
Arbitrary
Measurement Point Display data of page: 3, address: 39 of
Measuring Instrument the adjusting remote commander
Specified Value
"37" to "C9"
Checking method:
1) Check that the display data of page: 3, address: 39 is "37" to
"C9".

3-4-4. BIST Check

1. Playback System Check

1) Set the POWER switch to VTR (or PLAYER) position.
2) Connect the adjusting remote commander and set the HOLD
switch to HOLD (SERVICE) position.
3) Playback the BIST check tape.
IC1701(D1) Playback System Check
4) Set data: 04 to page: 4, address: 11 and press the PAUSE button.
5) Set data: 00 to page: 4, address: 11 and press the PAUSE button.
6) Set data: 03 to page: 4, address: 13 and press the PAUSE button.
(The data will be automatically return to "00".)
7) When the IC1701 (D1) n IC1601 (U1) playback system is
normal, following data will be displayed in page: 4, address: 14
and 15.
Page Address
4
4
8) When the IC1701(D1) n IC3501(INDI) playback system is
normal, following data will be displayed in page: 4, address: 16
and 17.
Page
Address
4
4
9) When the IC1701 (D1) n IC1901 (A1) playback system is
normal, following data will be displayed in page: 4, address: 18
and 19.
Page Address
4
4
IC1901(A1) Playback System Check
10) Set data: 10 to page: 4, address: 11 and press the PAUSE button.
11) Set data: 00 to page: 4, address: 11 and press the PAUSE button.
12) Set data: 04 to page: 4, address: 13 and press the PAUSE button.
(The data will be automatically return to "00".)
13) When the IC1901(A1) playback system is normal, following
data will be displayed in page: 4, address: 14 and 15.
Page Address
4
4
14) Set data: 08 to page: 4, address: 11 and press the PAUSE button.
15) Set data: 07 to page: 4, address: 13 and press the PAUSE button.
(The data will be automatically return to "00".)
16) Set data: 00 to page: 4, address: 11 and press the PAUSE button.
17) Perform "Recording System Check".
5–51
Data
E5 (NTSC), 27 (PAL)
15
11 (NTSC), CA (PAL)
14
Data
17 C0 or BA (NTSC), DC (PAL)
16 6E or 04 (NTSC), 44 (PAL)
Data
19 33 or B2 (NTSC), A2 (PAL)
18 59 or 19 (NTSC), 03 (PAL)
Data
15 7B (NTSC), CC (PAL)
14 B5 (NTSC), C0 (PAL)