Sony CA-755, Руководство по обслуживанию

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2-15 (E)
CA-755/755P
2-4-11. EARPHONE Level Adjustment
Preparations :
.
Connect the CA-755/755P to a completely-adjusted CCU.
.
Supply an 1 kHz, 2.2 V p-p (0 dBu) sine wave from the
low frequency oscillator to Pin 1 (Y), Pin 2 (X) and Pin
3 (G) of INTERCOM connector on the CCU front panel.
.
S5/TR-101 board
→
INCOM
.
Setting of the CCU switches
(CCU-550 series)
S601(INCOM PROD SELECT)/AU-231 board
→
4W
S602(INCOM ENG SELECT)/AU-231 board
→
4W
(CCU-700/700A series)
S2062(PROD/PRIVATE/ENG)/AT-88 board
→
PROD
S2241(INCOM PROD SEL)/AT-88 board
→
4W
To be extended : TR-101 board
Equipment : Oscilloscope/Audio level meter
Low frequency oscillator
Test point :
TP10/TR-101 board
Adjustment point :
1
RV14 (OUT LEVEL)/
TR-101 board
Specifications :
220
±
10 mV p-p (
_
20.0
±
0.2 dBu)
Setting after adjustment
.
Reset each switch to the former position.
2-4-12. PGM Demoduration Level Adjustment
Preparations :
.
Connect the CA-755/755P to a completely-adjusted CCU.
.
Supply an 1 kHz, 2.2 V p-p (0 dBu) sine wave from the
low frequency oscillator to INTERCOM/TALLY/PGM
connector on the CCU rear panel.
(CCU-550 series) Pin 6 (X), Pin 7 (Y), Pin 8 (G)
(CCU-700/700A series) Pin 1 (X), Pin 2 (Y), Pin 3 (G)
.
Setting of the CCU switches
(CCU-550 series)
S451(PGM IN)/AU-231 board
→
0 dB
(CCU-700/700A series)
S2081(PGM IN)/AT-88 board
→
0 dB
To be extended :
TR-101 board
Equipment : Oscilloscope
Low frequency oscillator
Test point :
TP14/TR-101 board
Adjustment point : 1
RV15 (PGM LEVEL)/
TR-101 board
Specifications : 220
±
10 mV p-p (
_
20.0
±
0.2 dBu)
Setting after adjustment
.
Reset each switch to the former position.
2-4. TR-101 Board Adjustment
2-4-11. EARPHONE Level Adjustment
2-4-12. PGM Demoduration Level Adjustment