Pioneer A-509R Service Manual

A-509R
24
6. ADJUSTMENTS
6.1 IDLE CURRENT ADJUSTMENT
¶ CAUTION : Heatsinks’ (Q323–Q326) DC level is equal to +B or -B.
Don’t touch them or you will be electricary chocked.
1. Connect the measuring instrument as Fig.6-1. (R415 or R416)
2. Set the VOLUME CONTROL to minimum, BASS TONE CONTROL to center, TREBLE TONE CONTROL to center and BALANCE CONTROL
to center. Set VR301 and VR302 to minimum.
3. Set the POWER switch to ON.
4. Adjust VR301 (VR302) so that the voltage between both sides of R415 (R416) becomes 16mV±1mV. (Within 10 seconds from when the relay
is turned ON)
5. Ages for 7 minutes.
6. Adjust VR301 (VR302) so that the voltage between both sides of R415 (R416) becomes 11mV±1mV.
VR301 VR302
R413 R414
R415 R416
Heat Sink
CN204
AF ASSY
DC Voltmeter DC Voltmeter
SIDE A
Heat Sink
Heat Sink
Heat Sink
R417
W212
W150
Fig.6-1 Adjustment Method

Pioneer A-509R Specifications

Amplifier Section

continuous power output (20 Hz to 20 kHz, 8 Ω)	45 W + 45 W
continuous power output (20 Hz to 20 kHz, 4 Ω)	65 W + 65 W
DIN continuous power output (1 kHz, 8 Ω)	60 W + 60 W
DIN continuous power output (1 kHz, 4 Ω)	90 W + 90 W
total harmonic distortion (20 Hz to 20 kHz, 20 W, 8 Ω)	0.05 %
input sensitivity/impedance (PHONO MM)	2.8 mV/50 kΩ
input sensitivity/impedance (CD, TUNER, LINE/SB, TAPE 1/CD-R/MD, TAPE 2 MONITOR)	200 mV/50 kΩ
PHONO (MM) overload level (1 kHz, T.H.D. 0.1 %)	150 mV
output level/impedance (TAPE 1/CD-R/MD, TAPE 2 MONITOR)	200 mV/1 kΩ
frequency response (PHONO MM)	20 Hz to 20 kHz ± 0.5 dB
frequency response (CD, TUNER, LINE/SB, TAPE 1/CD-R/MD, TAPE 2 MONITOR)	5 Hz to 100 kHz +0-3 dB
tone control (BASS)	± 8 dB (100 Hz)
tone control (TREBLE)	± 8 dB (10 kHz)
loudness contour (volume control set at – 30 dB position)	+ 5 dB (100 Hz)/ + 3 dB (10 kHz)
signal-to-noise ratio (PHONO MM, 5 mV input)	86 dB
signal-to-noise ratio (CD, TUNER, LINE/SB, TAPE 1/CD-R/MD, TAPE 2 MONITOR)	106 dB
signal-to-noise ratio (DIN, continuous power/ 50 mW, PHONO MM)	71 dB/ 67 dB
signal-to-noise ratio (DIN, continuous power/ 50 mW, CD, TUNER, LINE/SB, TAPE 1/CD-R/MD, TAPE 2 MONITOR)	95 dB/ 71 dB

Power Supply

power requirements	AC 220 - 230 V, 50/60 Hz
power consumption	160 W
power consumption in standby mode	1 W
AC outlet switched	100 W

Weight and Dimensions

dimensions (including knobs and other protruding parts)	420 (W) x 335 (D) x 128 (H) mm
weight (without package)	6.9 kg