Sony DCR-TRV10 Service Manual - Page 128

AGC Center Level and APC & AEQ Adjustment, 2. AGC Center Level Adjustment VC-217 board

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4. Switching Position Adjustment (VC-217 board) Mode Signal Measurement Point Measuring Instrument Adjustment Page Adjustment Address Specified Value VTR playback SW/OL reference tape (XH2-3) Display data of page: 3, address: 03 Adjustment remote commander C 10, 11, 12, 13 00 Adjusting method: 1) Insert the SW/OL reference tape and enter the VTR STOP mode. 2) Select page: 0, address: 01, and set data: 01. 3) Select page: 3, address: 21, and check that the data is "02". Note: If the data of page: 3, address: 21 is "72", the tape top being played. After playing the tape for 1 to 2 seconds, perform step 4 and higher. 4) Select page: 3, address: 01, set data: 0D, and press the PAUSE button of the adjustment remote commander. 5) Select page: 3, address: 02, and check that the data changes to "00". 6) Select page: 3, address: 03, and check that the data is "00". Note: If bit 0 of page: 3, address: 03 data is "1", the even channel is defective. If bit 1 is "1", the odd channel is defective. Contents of the defect is written into page: C, addresses: 10 and 12. See the following table. (For the bit values, refer to "5-4. SERVICE MODE", "4-3. 3. Bit value discrimination". ) 7) Select page: 0, address: 01, and set data: 00. When the even channel is defective Data of page: C, Contents of defect address: 10 EE Writing into EEPROM (IC2404) is defective E8 Adjustment data is out of range E7 No data is returned from IC1900 (TRX) When the odd channel is defective Data of page: C, Contents of defect address: 12 EE Writing into EEPROM (IC2404) is defective E8 Adjustment data is out of range E7 No data is returned from IC1900 (TRX) 5. AGC Center Level and APC & AEQ Adjustment 5-1. Preparations before adjustments Mode Camera recording Subject Arbitrary Adjusting method: 1) Select page: 2, address: 30, and set data: 40. 2) Record the camera signal for three minutes. 5-2. AGC Center Level Adjustment (VC-217 board) Mode Playback Signal Measurement Point Recorded signal at "Preparations before adjustments" Pin @º of CN2904 (RF MON) (Note 1) Measuring Instrument Oscilloscope Adjustment Page C Adjustment Address 1E Specified Value The display data of page: 3, address: 03 is "00" Note 1: Connect a 75Ω resistor between Pin @º and Pin !ª (GND) of CN2904. 75Ω resistor (Parts code: 1-247-804-11) Adjusting method: 1) Select page: 0, address: 01, and set data: 01. 2) Playback the recorded signal at "Preparations before adjustments" 3) Select page: 3, address: 33, and set data: 08. 4) Confirm that the playback RF signal is stable. 5) Select page: 3, address: 01, set data: 23, and press the PAUSE button of the adjustment remote commander. 6) Select page: 3, address: 02, and check that the data is "00". 7) Select page: 3, address: 03, and check that the data is "00". Note: If the data of page: 3, address: 03 is other than "00", adjustment has errors. (Take an appropriate remedial measures according to the errors referring to the following table. ) 8) Perform "APC & AEQ Adjustment". Data of page: 3, Contents of defect address: 03 20 Perform re-adjustment. (Note 2) 30 The machine is defective 40 Perform re-adjustment (Note 2) 50 The machine is defective Note 2: If this data is displayed twice successively, the machine is defective. VC-217 board CN2904 5-42

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5-42
4. Switching Position Adjustment (VC-217 board)
Mode
VTR playback
Signal
SW/OL reference tape (XH2-3)
Measurement Point
Display data of page: 3, address: 03
Measuring Instrument
Adjustment remote commander
Adjustment Page
C
Adjustment Address
10, 11, 12, 13
Specified Value
00
Adjusting method:
1)
Insert the SW/OL reference tape and enter the VTR STOP
mode.
2)
Select page: 0, address: 01, and set data: 01.
3)
Select page: 3, address: 21, and check that the data is “02”.
Note:
If the data of page: 3, address: 21 is “72”, the tape top being
played. After playing the tape for 1 to 2 seconds, perform step 4
and higher.
4)
Select page: 3, address: 01, set data: 0D, and press the PAUSE
button of the adjustment remote commander.
5)
Select page: 3, address: 02, and check that the data changes to
“00”.
6)
Select page: 3, address: 03, and check that the data is “00”.
Note:
If bit 0 of page: 3, address: 03 data is “1”, the even channel is
defective. If bit 1 is “1”, the odd channel is defective. Contents
of the defect is written into page: C, addresses: 10 and 12. See
the following table. (For the bit values, refer to “5-4. SERVICE
MODE”, “4-3. 3. Bit value discrimination”. )
7)
Select page: 0, address: 01, and set data: 00.
When the even channel is defective
When the odd channel is defective
Data of page: C,
address: 10
EE
E8
E7
Contents of defect
Writing into EEPROM (IC2404) is defective
Adjustment data is out of range
No data is returned from IC1900 (TRX)
Data of page: C,
address: 12
EE
E8
E7
Contents of defect
Writing into EEPROM (IC2404) is defective
Adjustment data is out of range
No data is returned from IC1900 (TRX)
5. AGC Center Level and APC & AEQ Adjustment
5-1. Preparations before adjustments
Mode
Camera recording
Subject
Arbitrary
Adjusting method:
1)
Select page: 2, address: 30, and set data: 40.
2)
Record the camera signal for three minutes.
5-2. AGC Center Level Adjustment (VC-217 board)
Mode
Playback
Signal
Recorded signal at “Preparations
before adjustments”
Measurement Point
Pin
@º
of CN2904 (RF MON) (Note 1)
Measuring Instrument
Oscilloscope
Adjustment Page
C
Adjustment Address
1E
Specified Value
The display data of page: 3, address:
03 is “00”
Note 1:
Connect a 75
Ω
resistor between Pin
@º
and Pin
!ª
(GND) of
CN2904.
75
Ω
resistor (Parts code: 1-247-804-11)
Adjusting method:
1)
Select page: 0, address: 01, and set data: 01.
2)
Playback the recorded signal at “Preparations before
adjustments”
3)
Select page: 3, address: 33, and set data: 08.
4)
Confirm that the playback RF signal is stable.
5)
Select page: 3, address: 01, set data: 23, and press the PAUSE
button of the adjustment remote commander.
6)
Select page: 3, address: 02, and check that the data is “00”.
7)
Select page: 3, address: 03, and check that the data is “00”.
Note:
If the data of page: 3, address: 03 is other than “00”, adjustment
has errors. (Take an appropriate remedial measures according
to the errors referring to the following table. )
8)
Perform “APC & AEQ Adjustment”.
Note 2:
If this data is displayed twice successively, the machine is defective.
Data of page: 3,
address: 03
20
30
40
50
Contents of defect
Perform re-adjustment. (Note 2)
The machine is defective
Perform re-adjustment (Note 2)
The machine is defective
CN2904
VC-217 board