Service Manuals, User Guides, Schematic Diagrams or docs for : DENON AV Surround Receiver & Amplifier AV Surround Receiver & Amplifier Denon - AVR-2803 & 983 & AVC-2870 Схема AVR-2803 & 983 & AVC-2870 Ver. 2
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For U.S.A., Canada, Europe, Asia,
China, Hong Kong, Taiwan R.O.C.,
Korea & Japan model
Ver. 2
SERVICE MANUAL
AV SURROUND RECEIVER/AMPLIFIER
Please use this service manual with referring to the
operating instructions without fail.
Some illustrations using in this service manual are
slightly different from the actual set.
16-11, YUSHIMA 3-CHOME, BUNKYOU-KU, TOKYO 113-0034 JAPAN
Telephone: 03 (3837) 5321
X0163 V.02 DE/CDM 0302
AVR-2803/983/AVC-2870 2
SAFETY PRECAUTIONS
The following check should be performed for the continued protection of the customer and service technician.
LEAKAGE CURRENT CHECK
Before returning the unit to the customer, make sure you make either (1) a leakage current check or (2) a line to chassis
resistance check. If the leakage current exceeds 0.5 milliamps, or if the resistance from chassis to either side of the
power cord is less than 460 kohms, the unit is defective.
500V
1M
(1)
(2)
(1)
(2)
2
AVR-2803/983/AVC-2870 3
Top Cover
Hook
Front Panel
Hook
Hook Hook
Inner Panel
3
AVR-2803/983/AVC-2870 4
Nut
Round Knob
Square Knob
Nut
Round Knob
Pre-out Unit
Component Video Unit
Amp Connect Unit
Regulator Unit
4
AVR-2803/983/AVC-2870 5
Rear Panel
Chassis
5
AVR-2803/983/AVC-2870 6
VOLUME LEVEL
REMOTE SIGNAL SURROUND
SENSOR BACK CH
DIGITAL OUTPUT
INPUT SIGNAL
ON / STANDBY AUTO PCM DTS DETECT
1 2
6
AVR-2803/983/AVC-2870 7
-
7
AVR-2803/983/AVC-2870 8
SR ch
VR302
SR ch
TP101
SL ch
FR ch
SL ch
VR301
FR ch
VR102
FL ch
DC Voltmeter VR101
C ch
VR201
FL ch
C ch TP301
SBR ch
SBL ch
SBR ch
VR402
SBL ch
VR401
Audio Section
8
AVR-2803/983/AVC-2870 9
BLOCK DIAGRAMS (1/2)
9
AVR-2803/983/AVC-2870 10
BLOCK DIAGRAMS (2/2)
10
AVR-2803/983/AVC-2870 11
LEVEL DIAGRAMS (1/4)
Correctives in VOL circuit
Other
11
AVR-2803/983/AVC-2870 12
LEVEL DIAGRAMS (2/4)
Correctives against other
channels in VOL circuit
D/A OUT : +5dB
EXT IN : Correctives
12
AVR-2803/983/AVC-2870 13
LEVEL DIAGRAMS (3/4)
COMPOSIT IN
13
AVR-2803/983/AVC-2870 14
LEVEL DIAGRAMS (4/4)
14
AVR-2803/983/AVC-2870 15
CLOCK FLOW & WAVE FORM IN DIGITAL BLOCK
Wave form
CH1: D-DATA
(IC513 (5) )
CH1: DATA
CH2: fs
CH3: 64fs
CH1: DATA
CH2: fs
CH3: 64fs
CH4: 256fs
15
AVR-2803/983/AVC-2870 16
16
AVR-2803/983/AVC-2870 17
) : IC No.
100 81
1 80
TOP VIEW
30 51
31 50
17
AVR-2803/983/AVC-2870 18
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