Front Panel Facilities - Pioneer SPEC-2 Service Manual

2. FRONT PANEL FACILITIES
P E A K L E V E L M E T E R S
When speaker systems of 8O nominal impedance are con-
nected, these provide direct readout of the output power
in Watts.
NOTE:
Speoher syotem impedance uaries occording to frequency.
To obtoin o preciae medsurcment of the output poue\
remoue Spedher con\ectiotrs ond connect 8a dumtuy
loods ocro4i the SPEAKERS termindls-
POWER SWI CH
S'et to ON to energize the SPEC-2. Output will not be
obtained until the PRoTEcTIoN indicator lamp Soes out.
This effect is due to the internal muting circuit and does
not indicate malfunction.
METER ZERO POINT ADJ USTMENT
PROTECTION INDICATOR
The lamp lights when the protection circuit functions.
lf the lamp stays on during operation, turn off the
POWER switch and check as described in the section
"Protection Circuit Operation". After identifying and
correcting the source of difficulty, if the lamp still fails
to extinguish, contact a Pioneer Authorized Service
Center,
INPUT LEVEL CONTROLS (LEFT & RIGHT)
Adjust LEFT and RIGHT controls according to the
output level (voltage) of the pre-amplifier connected to
the SPEC-2 INPUT (L & R) jacks. Control positions
correspond to 2V at MAX (fully clockwise), 4V at center
of rotation, and d at MIN (fully counter-ciockwise)
Normally set these controls to MAX (2V).
.
lf the minimum output voltage of the employed pre-
amplifier does not reach 2V. set the controls to MAX
(2V). In this case the effective output indicated in the
specifications will not be obtained (for example 1/4
of the specified output can be attained with a pre-
amplifier output voltage of 1V).