DVR-104
39
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7
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C
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A
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6.2 ADJUSTMENT
6.2.1 VCO Free-running Adjustment
6.2.2 BPF Center frequency Adjustment / Wobull Dely Adjustment
Initial Setting
Short-circuit with jumper pin at the second (MA and SL) from the right side of the short-pin while looking from the rear side.
(Test mode)
Enter code "9AJ". (Taking in command of adjustment initial value.)
Note
: This command does not need to issue it once again if issued it once. However, perform the Power Adjustment surely
afterwards when issued this command.
MA
SL
Short
(1, 2pin)
Short
(3, 4pin)
1
2
Fig.3 Short pin diagram
GND
GND
Objective
Symptom when out
of adjustment
Player state
POWER ON
Adjustment
VC701 and VC702
location
Disc
None needed
Measurement Instru-
ment connections
Adjustment standard
value
Connect the digital multimeter to TP717
and TP718.
[1st PLL adjustment] : 2.5V
±
0.05V
[2nd PLL adjustment] : 2.5V
±
0.05V
[Procedure]
Enter the RS-232C command.
"5DT" (Selects 4.7R mode)
"1MS"
"+124+AS"
"+0E+DW" (Enter the VCO free-running adjustment mode)
[1st PLL Adjustment]
Adjust VC701 so that the voltage of TP717 (periphery of IC602 R3 chip) becomes 2.5V
±
0.05V.
[2nd PLL Adjustment]
Adjust VC702 so that the voltage of TP718 becomes 2.5V
±
0.05V.
"+00+DW" (It escapes from VCO fre- runing adjustment mode)
Symptom when out
of adjustment
Player state
POWER ON
Adjustment
Set the value with the command
location
Disc
None needed
Measurement Instru-
ment connections
Adjustment standard
value
[Procedure]
It is automatic adjustment of only a command without setting a disc.
"5DT" (Selects 4.7R mode)
"1XS" (1x Setup)
"+9FR"
"2XS" (2x Setup)
"+9FR"
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