Technics SH 9010 Service Manual

Page 2

in LOCATION OF CONTRoLs ,

{LEFT CHANNEL '_ ,. RIGHT CHANNEL
,, FREQUENCYvLEVEL FREQUENCYLEVEL ,

POWER /

, EQUALIZER LEFT CTANNEL RIGHT CHANNEL

VSELECTOR (INNER) CENTER FREQUENCY CONTROL
(OUTER) BAND WIDTH(Q) CONTROL

FRONT VIEW

. ADDER &5UBTRACTER ,
CIRCUIT .

INPUT BUFFER CIRCUIT

RIGHT CH. BAND-PASS-
FILTER CIRCUIT

INSIDE VIEW

VOLTAGE
f SELECTOR,

REAR VIEW

MUTING RELAY

POWER TRANSFORMER

POWER SUPPLY CIRCUIT

LEFT CH. BAND-PASS-
FILTER CIRCUIT.

l CONTROL OF THE FREQUENCY RESPONSE

+12dB
FREQUENCY LEVEL ' , OdB
CONTROL . 1

-12dB

CENTER FREQUENCY

BAN D WIDTH (Q)
CONTROL

CENTER FREQUENCYUO)
CONTROL

SH-9010

Frequency response can be adjusted by using the

' 5 bandlevel controls, one for each band, the 5

center-frequency controls, and the 5 bandwidth
controls. The maximum adjustment is from
20 Hz to 48 kHz (corresponding to a range of
i 12dB in which the band level is variable).

The standard frequency for each of the 5 divi-
sions is: 360Hz, 240 Hz, 1kHz, 4kHz and
16 kHz. One band-level control, one center-
frequency control, and one bandwidth control
are assigned to each division, and variations are
possible within a range of + 12dB to -12»dB (for
each band-level control), 1.6 octave above and
below the standard frequency (for each center-
frequency control), and, of "Q", from 0.7 to 7,
(the sharpness of the peak and dip).

The function of each control is explained below.
Although the frequency range differs for each
division, the actual Operation of the controls for
all 5 divisions is the same.