Sony 900, 930, 950 manual 6Internal Switches and Internal, Boards Internal switches Boards AT Board

7	7-4-6Internal Switches and Internal	7-4-7Internal Switches and Internal
	Boards – Internal switches	Boards – AT Board

The following switches are located inside the unit behind the front panel:

1 Internal main power switch

1

POWER	CABLE
CAM	ALARM
MAIN	OPEN
	SHORT
INCOM MIC ON	PROD
OFF	PRIV	CARBON
	S4	ECM
PGM ENG		DYNAMIC
		GND
		S5
		OPEN

2Headset microphone setting switch 2 (S5)

3Headset microphone setting switch 1 (S4)

aInternal main power switch

When an abnormality has occurred, and power cannot be cut off with the POWER switch on the front panel, you may turn off the unit using the internal main power switch.

bHeadset microphone setting switch 1 (S4) Set the switch according to the microphone of the headset connected to the intercom connector on the front panel of this unit:

CARBON: Carbon microphone (power supply, 20- dB gain)

ECM: Electret condenser microphone (power supply, 40-dB gain)

DYNAMIC: Dynamic microphone (no power supply, 60-dB gain)

cHeadset microphone setting switch 2 (S5) When you set setting switch 1 (S4) to ECM or DYNAMIC, also set this switch accordingly: GND: Unbalanced type

OPEN: Balanced type

AT

POWER	1 POWER indicator
/1.001	2 /1.001 indicator
90H	3 90H indicator
REFERENCE
REF IN
UN	4 REFERENCE indicators and switch
LOCK

HD

REM

BB

HPHASE

STEP

5H PHASE switches

COARSE

ADV

DELAY

aPOWER indicator

The LED is lit when the power voltage inside the board is normal.

b/1.001 (frame frequency) indicator

The LED is lit when the frame frequency of the system is set to 1/1.001.

c90H (phase difference) indicator

The LED is lit when the phase difference between the HD output and SD output is set to 90H (HD).

dREFERENCE indicators and switch

The switch is to select the type of sync signal to be connected to either of the REFERENCE connectors on the rear panel.

HD: HD tri-level reference sync signal (local setting)

REM (remote): Signal selected on the MSU-700A/ 750 Master Setup Unit

BB: SD reference sync signal (black burst signal) (local setting)

When a signal is supplied to the REFERENCE connector, the REF IN indicator lights. If the type of the input sync signal does not match the setting on this unit, the UNLOCK indicator will light.

eH PHASE switches

Used to adjust the H phase. First set the phase by steps with the STEP switch, then adjust it with the COARSE switch. The COARSE switch will return to its original position when you release it. Press and hold it toward ADV to advance the phase or toward DELAY for phase delay.

HDC-900/950/930 Series Product Information Manual Chapter 7 Location and Function of Parts and Controls 98