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Items
Adjustment
Q) Power RAMP
Confirmation
R) Audio Check
and
confirmation
Point
-
Follow steps 1 to 3 of (J) above.
4.Confirm that Power RAMP is matching.
1. Link to BASE which is connected to Line Simulator.
-
2. Set line voltage to 48V and line current to 40mA.
3. Input -45dBm/1KHz to MIC and measure Line output level.
4. Confirm that the level is -10dBm ± 5dB and confirm that the distortion level is < 5% at
TEL Line (600
5. Input -20dBm/1KHz to Line I/F and measure Receiving level at REV1 and REV2.
6. Confirm that the level is -23dBm ± 5dB and confirm that the distortion level is < 5% at
Receiver (Volume Middle, 150
Procedure
Road).
Road).
104
Check or
Replace
Parts
IC1, IC3,
L2,
C54, C60,
C61,
C62, C63,
C64,
C65, C66,
C67,
C69, C81,
C82,
C56, R58,
R55, R76
IC1, IC2,
C68,
C37, C90,
C91,
R25, R26,
C12,
C87, C10,
R29,
C89, C17,
R37,
R38, R80,
C92,
C13, R35,
C15,
C16, D8,
C86,
C75, C77,
C38,
C80, R74,
R36
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