Switching Position Adjustment (Mr-41 Board); Agc Center Level Adjustment (Mr-41 Board) - Sony DCR-PC2E Service Manual

4. Switching Position Adjustment (MR-41 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 other than "72", the tape
top being played. After playing the tape for 1 to 2 seconds,
stop it, 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 Adjustment (MR-41 board)

Mode
Subject
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Note 1: Connect a 75
CN2904.
75 resistor (Parts code: 1-247-804-11)
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 2, address: 30, and set data: 40.
3) Record the camera signal for a minute.
4) Playback the recorded segment.
5) Select page: 3, address: 33, and set data: 08.
6) Confirm that the playback RF signal is stable.
7) Select page: 3, address: 01, set data: 23, and press the PAUSE
button of the adjustment remote commander.
8) Select page: 3, address: 02, and check that the data is "00".
9) 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. )
10) Select page: 3, address: 33, and set data: 00.
11) Select page: 2, address: 30, and set data: 00.
12) Select page: 0, address: 01, and set data: 00.
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.
PB RF signal is stable
Pin @º
Pin !¶
5-42
Camera record and playback
Arbitrary
Pin @º of CN2904 (RF MON) on
VC-220 board (Note 1)
External trigger: Pin !¶ of CN2904
(SWP)
Oscilloscope
C
1E
The display data of page: 3,
address: 03 is "00"
resistor between Pin @º and Pin !ª (GND) of
6.7 msec
Fig. 5-3-6.