Sony DSR-20MD, Service Manual

Page: 161 / 225

5-69
5. AEQ Adjustment (RP-228 Board)
Note 1:
Connect a 75
Ω
resistor between Pin
8
and
7
(GND)
of CN 775.
75
Ω
resistor (Parts code: 1-247-804-11)
Note 2:
Use the DVM60ME tape or equivalents.
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: C, address: 4B, set data: 80, and press the PAUSE
button of the adjusting remote commander.
3) Write data in page: C, addresses: 40 to 43, and 5A as shown in
the following table.
To write the data, press the PAUSE button of the adjusting
remote commander each time data is set.
Mode Recording/playback
Signal Arbitrary
Measurement Point Pin
8
of CN775 (RF MONITOR) (Note 1)
Measuring Instrument Oscilloscope
Adjustment Page C
Adjustment Address 40, 41, 42, 43, 5A
Address Data
40 C0
41 C0
42 90
43 90
5A 00
4) Record color bar signal for one minute from the tape top.
5) Rewind the tape, and play back the part recorded.
6) When the RF output stabilizes, select page: 3, address: 01,
and set data: 07, and press the PAUSE button of the adjusting
remote commander.
7) About 20 to 30 seconds after pressing the PAUSE button, se-
lect page: 3, address: 02, and check that the data changes from
“07” to “00”.
8) Select page: 3, address: 03, and check that the data is the fol-
lowing value.
When “00” : Normal
When “01” : EVENch is faulty
When “02” : ODDch is faulty
When “03” : EVENch and ODDch are faulty
Perform the following procedure only when “00” is displayed.
9) Select page: 3, address: 04 to 07, read the data, and take the
values as D
04
, D
05
, D
06
, and D
07
.
10) Select page: C, address: 40, set data: D
04
, and press the PAUSE
button of the adjusting remote commander.
11) Select page: C, address: 42, set data: D
05
, and press the PAUSE
button of the adjusting remote commander.
12) Select page: C, address: 41, set data: D
06
, and press the PAUSE
button of the adjusting remote commander.
13) Select page: C, address: 43, set data: D
07
, and press the PAUSE
button of the adjusting remote commander.
14) Select page: C, address: 5A, set data: 8C, and press the PAUSE
button of the adjusting remote commander.
15) Select page: C, address: 4B, set data: 00, and press the PAUSE
button of the adjusting remote commander.
16) Select page: 0, address: 01, and set data: 00.