Marantz MM8003 Service Manual

2
2. POWER AMPLIFIER ADJUSTMENT
Idling Current Alignment
1. Each of the measurement points are provided with the
two test points. Set a digital Voltage meter to DC voltage
input, connect the meter to the test points at both contact
points.
2. After the setup above, turn on the main switch.
3. Adjust variable resistors (VR20 - VR50) according to the
digital voltmeter readings. The target setting value is the
following table for each channel.
Settings : No-signal of input
Speaker out — No Load
Top lid — OPEN
Time Table of Idling Current Rise
FAN
POWER AMP MODULE
MAIN HEAT SINK
FRONT SIDE
REAR SIDE
Measurement Point
AMP PWB Channel
Adjustment
VR
Measurement Point
Front side
AMP PWB
SL (CHANNEL 3) VR20 CN20
SR (CHANNEL 4) VR30 CN30
SBL (CHANNEL 5) VR40 CN40
SBR (CHANNEL 6) VR50 CN50
Rear side
AMP PWB
L (CHANNEL 1) VR50 CN50
R (CHANNEL 2) VR40 CN40
C (CHANNEL 7) VR30 CN30
OPT (CHANNEL 8) VR20 CN20
After Turning ON
Ambient temperature
20 to 30 degrees centigrade
Measurement Voltage
10 min. 1.5 mV ± 0.2 mV
20 min. 1.5 mV ± 0.2 mV
30 min. 1.5 mV ± 0.2 mV
SL
(CHANNEL 3)
VR20
CN20
SR
(CHANNEL 4)
VR30
CN30
SBL
(CHANNEL 5)
VR40
CN40
SBR
(CHANNEL 6)
VR50
CN50
L
(CHANNEL 1)
VR50
CN50
R
(CHANNEL 2)
VR40
CN40
C
(CHANNEL 7)
VR30
CN30
OPT
(CHANNEL 8)
VR20
CN20
2. POWER AMPLIFIER ADJUSTMENT
アイドリング電流調整
1. 電源をONする前にそれぞれの"+"端子と"-"端子間にデジタ
ルボルトメーターを接続します。デジタルボルトメーター
を
DC電圧入力にセットします。
2. 上記のセットアップの後に、本機の電源をONします。
3. デジタルボルトメーターの電圧値を監視しながら可変抵抗
器
(VR20 〜 VR50)を調節します。
各チャンネルの目標値は下記の表を参照下さい。
セッティング
: 入力信号無し
スピーカー接続  無し
トップカバー –– 無し
フロント側のパワーアンプCHANNEL 3 (SL) / CHANNEL
4 (SR) CHANNEL 5 (SBL)/ CHANNEL 6 (SBR)
のアイド
リング電流調整を行う場合はフロントパネルを外して行っ
てください。

Marantz MM8003 Specifications

General

Damping factor	100
Amplifier class	-
Frequency range	8 - 100000 Hz
Input sensitivity	2400 mV
Audio output channels	7.1 channels
Peak power per channel	170 W
Signal-to-Noise Ratio (SNR)	105 dB
Total Harmonic Distortion (THD)	0.03 %
RMS power output per channel (8 Ohm)	140 W
AC (power) in	Yes
Speakon ports quantity	8
Purpose	Home
Product color	Black
Cables included	AC
Connectivity technology	Wired
Power consumption (standby)	0.4 W
Power consumption (typical)	880 W

Weight and Dimensions

Depth	384 mm
Width	440 mm
Height	184.5 mm
Weight	17900 g