Manley СORE REFERENCE CHANNEL STRIP - MCORE026 and up 7/2 Instrukcja Użytkownika Pobierz pdf (Strona 12)

VR12

VR16

Diagram 8

Diagram 9

14. Servicing

VR11

VR9

VR6

12AX7WA

6922

TUBE LOCATION

CALIBRATION TRIM POT LOCATION

c o r e

TEST POINT LOCATION

VR15

GR-ZERO

GR-METER

GR-AUDIO

2 Amp Slow-Blow (T)

20mm Ceramic FUSE

LIM CV

LIM REF V

OP1 ZERO VU

15. Core Calibration Procedure

The CORE requires calibration for 3 sections of its circuitry:

I) VU METER- Adjust: +4dBu (1.228 Volts RMS) = “0” VU, Meter “GR” zero set

ii) ELOP COMPRESSOR - Adjust: Gain Reduction (Audio & Meter GR)

iii) FET PEAK LIMITER - Adjust: reference voltage & FET control voltage

Tools required:

- Audio Tone Generator (oscillator)

- Audio Analyzer or a voltmeter capable of reading both DC & AC voltages.

Initial settings:

- Mic/Line Input select switch: Out = LINE IN Enable

- 120Hz HP filter switch: Out = Disable

- Gain switch: Out = LOW

- 48V Phantom switch: Out = OFF

- Phase Invert switch: Out = 0

- Input Level Attenuator: Set at Minimum

- Compressor Section: Switch = Bypass; Compression = MAX, Attack & Release = FAST

- Shelving EQ section: High/Low controls set both = 12:00 o'clock.

- Mid EQ section: Boost/Cut control = 12:00 O'clock, Frequency range select switch = 100Hz-1kHz,

Frequency sweep control = MIN

- Peak Limiter section: Limiting = MIN, Release = 12:00 o'clock

- Output Gain Control: 12:00 o'clock

1 2 ... 7 8 9 10 11 12 13 14 15 16

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