Panasonic wr da 7 service manual

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ORDER NO. AV8980509301

Service ManZUal

Audio Mixer

WR-DA7

The Meter Bridge shown in photo is one of the optional accessories.

SPECIFICATIONS

General
Power requirement : AC 120 V 60 Hz
Power consumption : 105 W (with options)
Frequency response : 20 Hz - 20 kHz, +1 dB - -2 dB
T.H.D. (total harmonic distortion) : Less than 0.1 % (input = +10 dB/1 kHz, output: +4 dB/RL 600 9)
Equivalent input noise : -128 dB (Rs = 150 (2 Input sensitivity = -60 dB typical)
Residual noise : -93 dB typical
Maximum voltage gain : 84 dB: MIC/LINE(1»16) in to BUS out
84 dB: MIC/LINE(1»16) in to MASTER out
84 dB: MlC/LlNE(1-16) in to AUX out
Common Mode Rejection Ratio : More than 80 dB (1kHz)
Crosstalk : 90 dB typical (1kHz)

Dynamic Range (Fs = 48kHz, DIN audio filter) :
113 dB typical : DA converter (digital in to analog out)
112 dB typical : AD converter (analog in to digital out)
110 dB typical : AD + DA (analog in to analog out)

AD Converter : 24 bit, 64 times oversampling (input 1 to 16)
20 bit, 64 times oversampling (aux returns 3 to 6)
DA Converter : 24 bit, 64 times oversampling (MASTER, MONITOR A)

24 bit, 128 times oversampling (MONITOR B)
20 bit, 128 times oversampling (aux returns 3 to 6)

Internal signal processing : 32 bit (Dynamic range 192 dB)
Sampling Frequency (Fs) : Internal: 44.1 kHz and 48 kHz

External: 441 kHz : 6 % and 48 kHz : 6 %
Signal delay: Less than 2.5 ms, MIC/LINE input to MASTER out

©1998 Matsushita Communication Industrial (30., Ltd.

I
Panasonlc All rights reserved. Unauthorized copying and
® distribution is a violation of law.

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A WARNING

This service information is designed for experienced repair technicians only and is not designed for use by the
general public.

It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to
service a product.

Products powered by electricity should be serviced or repaired only by experienced protessional technicians. Any
attempt to service or repair the product or products dealt with in this service information by anyone else could
result in serious injury or death.

This symbol warns the user that uninsulated voltage Within
CAUTION the unit may have sul'ticieni magnitude to cause eleclrle
shock. Therelore, it is dangerous to make any klnd or contact

WWW With any inside part at this unit

CAUTION

TO REDUCE THE RISK OF ELEcTRic SHOCK,

Do NOT REMOVE coVER (on new NO USER Thls symhoi alerts the usertnat imputant literature concerning
SERVlCEABLE PARTS lNSlDE the operallun and maintenance DI this has been Included.
REFER sEerciNc TO QUALIFIED SERVICE Thererore, it should he read caretuliy in order to avoid
RERsoNNEL any problems

IMPORTANT SAFETY NOTICE

There are special components used in this equipment which are lmportarll Iur satety. These pads are indicated
by the "A" mark on the schematic diagram and the replacement parts list It is essential that these critical
pans should he replaced With manuIacturers specilied pans to prevent shock, tire, or other hazards,

Do not modlly the original design Without permission or manutacture.

Dynamics
Compressor
Threshold : -40 dB - 0 dB (1 dB/step)
Ratio: 1.0, 1.1, 1.3.1.5, 1.7, 2.0, 2.5, 3.0, 3.5.4.0, 5.0, 60,81), 10, 20, w (16 points)
Attack time : 0 ms - 250 ms (1 ms/step)
Release time : 5 ms - 2000 ms (5 ms/step)
Gain: 0 dB - +12 dB (0.5 dB/step)
Gate
Threshold : -80 dB - -15 dB (1 dB/step)
Attack Time : 0 ms - 250 ms (1 ms/step)
Release time : 5 ms - 2000 ms (5 ms/step)
Expander
Threshold : -80dB - -15dB (1dB/step)
Ratio: 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, as
Attack time : 0 ms - 250 ms (1 ms/step)
Release time : 5 ms - 2000 ms (5 ms/step)
Range: 0 dB - +40 dB (0.5 dB/step)
Equalizer

LOW band PEQ (parametric equalizer) type:

LOW band SHL (shelving low) type :
LOW band HPF (high-pass) type :
LOW-MID band PEQ type :
HIGH-MID band PEQ type:

HIGH band PEQ type:

HIGH band SHH (shelving high) type :

HIGH band LPF (low-pass) type:

0 = 0.5 » 50 (41 steps)

F = 20 Hz - 20 kHz (1/12 oct Step)
G = i 15 dB (05 dB/step)

F = 20 Hz -1.6 kHz (1/12 oct step)
G = 1 15 dB (0.5dB/step)

F = 20 Hz - 1.6 kHz (1/12 oct step)
Q = 0.5 - 50 (41 steps)

F = 20 Hz - 20 kHz (1/12 oct step)
G = t 15dB (0.5dB/step)

Q = 0.5 - 50 (41 steps)

F = 50 Hz - 20 kHz (1/12 oct step)
G = t 15 dB (05 dB/step)

Q = 0.5 - 50 (41 steps)

F = 50 Hz - 20 kHz (1/12 oct step)
G = t 15 dB (0.5 dB/step)

F =1 kHz . 20 kHz (1/12 oct step)
G = i 15 dB (0.5 dB/step)

1 kHz - 20 kHz (1/12 oct step)