Denon AVR-3801 User manual

Hi-Fi Component
SERVICE MANUAL
MODEL AVR-3801
AV SURROUND RECEIVER


Some illustrations using in this service manual are slightly different from the actual set.

AVR-3801
61
12 3 45678
A
B
C
D
E
BLOCK DIAGRAM
F
G
H
9 10 11

AVR-3801
62
11
10
9
8
7
6
5
4
A
B
C
D
E
WIRING DIAGRAM
F
G
H
321

63
12 3 45678
A
B
C
D
E
SCHEMATIC DIAGRAMS (1/15)
F
G
H
9 10 11
AVR-3801
NOTICE
ALL RESISTANCE VALUES IN OHM. k=1,000 OHM M=1,000,000 OHM
ALL CAPACITANCE VALUES IN MICRO FARAD. P=MICRO-MICRO FARAD
EACH VOLTAGE AND CURRENT ARE MEASUERD AT NO SIGNAL INPUT
CONDITION.
CIRCUIT AND PARTS ARE SUBJECT TO CHANGE WITHOUT PRIOR
NOTICE.
WARNING:
Parts marked with this symbol have critical characteristics.
Use ONLY replacement parts recommended by the manufacture.
CAUTION:
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 card is less than 460 kohms, the unit is defective.
WARNING:
DO NOT return the unit to the customer until the problem is located and
corrected.
SCHEMATIC DIAGRAMS (1/15)
1U-3320 (1/4) AUDIO/DSP UNIT
- B LINE
+ B LINE
SIGNAL
-
15V
+
15V
A
C
B
D

63
12 3 45678
A
B
C
D
E
SCHEMATIC DIAGRAMS (1/15)
F
G
H
9 10 11
AVR-3801
NOTICE
ALL RESISTANCE VALUES IN OHM. k=1,000 OHM M=1,000,000 OHM
ALL CAPACITANCE VALUES IN MICRO FARAD. P=MICRO-MICRO FARAD
EACH VOLTAGE AND CURRENT ARE MEASUERD AT NO SIGNAL INPUT
CONDITION.
CIRCUIT AND PARTS ARE SUBJECT TO CHANGE WITHOUT PRIOR
NOTICE.
WARNING:
Parts marked with this symbol have critical characteristics.
Use ONLY replacement parts recommended by the manufacture.
CAUTION:
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 card is less than 460 kohms, the unit is defective.
WARNING:
DO NOT return the unit to the customer until the problem is located and
corrected.
SCHEMATIC DIAGRAMS (1/15)
1U-3320 (1/4) AUDIO/DSP UNIT
- B LINE
+ B LINE
SIGNAL
-
15V
+
15V

63
12 3 45678
A
B
C
D
E
SCHEMATIC DIAGRAMS (1/15)
F
G
H
9 10 11
AVR-3801
NOTICE
ALL RESISTANCE VALUES IN OHM. k=1,000 OHM M=1,000,000 OHM
ALL CAPACITANCE VALUES IN MICRO FARAD. P=MICRO-MICRO FARAD
EACH VOLTAGE AND CURRENT ARE MEASUERD AT NO SIGNAL INPUT
CONDITION.
CIRCUIT AND PARTS ARE SUBJECT TO CHANGE WITHOUT PRIOR
NOTICE.
WARNING:
Parts marked with this symbol have critical characteristics.
Use ONLY replacement parts recommended by the manufacture.
CAUTION:
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 card is less than 460 kohms, the unit is defective.
WARNING:
DO NOT return the unit to the customer until the problem is located and
corrected.
SCHEMATIC DIAGRAMS (1/15)
1U-3320 (1/4) AUDIO/DSP UNIT
- B LINE
+ B LINE
SIGNAL
-
15V
+
15V

63
12 3 45678
A
B
C
D
E
SCHEMATIC DIAGRAMS (1/15)
F
G
H
9 10 11
AVR-3801
NOTICE
ALL RESISTANCE VALUES IN OHM. k=1,000 OHM M=1,000,000 OHM
ALL CAPACITANCE VALUES IN MICRO FARAD. P=MICRO-MICRO FARAD
EACH VOLTAGE AND CURRENT ARE MEASUERD AT NO SIGNAL INPUT
CONDITION.
CIRCUIT AND PARTS ARE SUBJECT TO CHANGE WITHOUT PRIOR
NOTICE.
WARNING:
Parts marked with this symbol have critical characteristics.
Use ONLY replacement parts recommended by the manufacture.
CAUTION:
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 card is less than 460 kohms, the unit is defective.
WARNING:
DO NOT return the unit to the customer until the problem is located and
corrected.
SCHEMATIC DIAGRAMS (1/15)
1U-3320 (1/4) AUDIO/DSP UNIT
- B LINE
+ B LINE
SIGNAL
-
15V
+
15V

63
12 3 45678
A
B
C
D
E
SCHEMATIC DIAGRAMS (1/15)
F
G
H
9 10 11
AVR-3801
NOTICE
ALL RESISTANCE VALUES IN OHM. k=1,000 OHM M=1,000,000 OHM
ALL CAPACITANCE VALUES IN MICRO FARAD. P=MICRO-MICRO FARAD
EACH VOLTAGE AND CURRENT ARE MEASUERD AT NO SIGNAL INPUT
CONDITION.
CIRCUIT AND PARTS ARE SUBJECT TO CHANGE WITHOUT PRIOR
NOTICE.
WARNING:
Parts marked with this symbol have critical characteristics.
Use ONLY replacement parts recommended by the manufacture.
CAUTION:
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 card is less than 460 kohms, the unit is defective.
WARNING:
DO NOT return the unit to the customer until the problem is located and
corrected.
SCHEMATIC DIAGRAMS (1/15)
1U-3320 (1/4) AUDIO/DSP UNIT
- B LINE
+ B LINE
SIGNAL
-
15V
+
15V

AVR-3801
64
11
10
9
8
7
6
5
4
A
B
C
D
E
SCHEMATIC DIAGRAMS (2/15)
F
G
H
321
NOTICE
ALL RESISTANCE VALUES IN OHM. k=1,000 OHM M=1,000,000 OHM
ALL CAPACITANCE VALUES IN MICRO FARAD. P=MICRO-MICRO FARAD
EACH VOLTAGE AND CURRENT ARE MEASUERD AT NO SIGNAL INPUT
CONDITION.
CIRCUIT AND PARTS ARE SUBJECT TO CHANGE WITHOUT PRIOR
NOTICE.
WARNING:
Parts marked with this symbol have critical characteristics.
Use ONLY replacement parts recommended by the manufacture.
CAUTION:
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 card is less than 460 kohms, the unit is defective.
WARNING:
DO NOT return the unit to the customer until the problem is located and
corrected.
+ B LINE
SIGNAL
SCHEMATIC DIAGRAMS (2/15)
1U-3320 (2/4) AUDIO DSP UNIT
+ 5V
+ 5V
+ 3.3V
A
C
B
D

AVR-3801
64
11
10
9
8
7
6
5
4
A
B
C
D
E
SCHEMATIC DIAGRAMS (2/15)
F
G
H
321
NOTICE
ALL RESISTANCE VALUES IN OHM. k=1,000 OHM M=1,000,000 OHM
ALL CAPACITANCE VALUES I N MICRO FARAD. P=MICRO-MICRO FARAD
EACH VOLTAGE AND CURRENT ARE MEASUERD AT NO SIGNAL INPUT
CONDITION.
CIRCUIT AND PARTS ARE SUBJECT TO CHANGE WITHOUT PRIOR
NOTICE.
WARNING:
Parts marked with this symbol have critical characteristics.
Use ONLY replacemen t parts recommended by the manufacture.
CAUTION:
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 card is less than 460 kohms, the unit is defective.
WARNING:
DO NOT return the unit to the customer until the problem is located and
corrected.
+ B LINE
SIGNAL
SCHEMATIC DIAGRAMS (2/15)
1U-3320 (2/4) AUDIO DSP UNIT
+ 5V
+ 5V
+ 3.3V

AVR-3801
64
11
10
9
8
7
6
5
4
A
B
C
D
E
SCHEMATIC DIAGRAMS (2/15)
F
G
H
321
NOTICE
ALL RESISTANCE VALUES IN OHM. k=1,000 OHM M=1,000,000 OHM
ALL CAPACITANCE VALUES I N MICRO FARAD. P=MICRO-MICRO FARAD
EACH VOLTAGE AND CURRENT ARE MEASUERD AT NO SIGNAL INPUT
CONDITION.
CIRCUIT AND PARTS ARE SUBJECT TO CHANGE WITHOUT PRIOR
NOTICE.
WARNING:
Parts marked with this symbol have critical characteristics.
Use ONLY replacemen t parts recommended by the manufacture.
CAUTION:
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 card is less than 460 kohms, the unit is defective.
WARNING:
DO NOT return the unit to the customer until the problem is located and
corrected.
+ B LINE
SIGNAL
SCHEMATIC DIAGRAMS (2/15)
1U-3320 (2/4) AUDIO DSP UNIT
+ 5V
+ 5V
+ 3.3V

AVR-3801
64
11
10
9
8
7
6
5
4
A
B
C
D
E
SCHEMATIC DIAGRAMS (2/15)
F
G
H
321
NOTICE
ALL RESISTANCE VALUES IN OHM. k=1,000 OHM M=1,000,000 OHM
ALL CAPACITANCE VALUES I N MICRO FARAD. P=MICRO-MICRO FARAD
EACH VOLTAGE AND CURRENT ARE MEASUERD AT NO SIGNAL INPUT
CONDITION.
CIRCUIT AND PARTS ARE SUBJECT TO CHANGE WITHOUT PRIOR
NOTICE.
WARNING:
Parts marked with this symbol have critical characteristics.
Use ONLY replacemen t parts recommended by the manufacture.
CAUTION:
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 card is less than 460 kohms, the unit is defective.
WARNING:
DO NOT return the unit to the customer until the problem is located and
corrected.
+ B LINE
SIGNAL
SCHEMATIC DIAGRAMS (2/15)
1U-3320 (2/4) AUDIO DSP UNIT
+ 5V
+ 5V
+ 3.3V

AVR-3801
64
11
10
9
8
7
6
5
4
A
B
C
D
E
SCHEMATIC DIAGRAMS (2/15)
F
G
H
321
NOTICE
ALL RESISTANCE VALUES IN OHM. k=1,000 OHM M=1,000,000 OHM
ALL CAPACITANCE VALUES I N MICRO FARAD. P=MICRO-MICRO FARAD
EACH VOLTAGE AND CURRENT ARE MEASUERD AT NO SIGNAL INPUT
CONDITION.
CIRCUIT AND PARTS ARE SUBJECT TO CHANGE WITHOUT PRIOR
NOTICE.
WARNING:
Parts marked with this symbol have critical characteristics.
Use ONLY replacemen t parts recommended by the manufacture.
CAUTION:
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 card is less than 460 kohms, the unit is defective.
WARNING:
DO NOT return the unit to the customer until the problem is located and
corrected.
+ B LINE
SIGNAL
SCHEMATIC DIAGRAMS (2/15)
1U-3320 (2/4) AUDIO DSP UNIT
+ 5V
+ 5V
+ 3.3V

65
12 3 45678
A
B
C
D
E
SCHEMATIC DIAGRAMS (3/15)
F
G
H
9 10 11
AVR-3801
NOTICE
ALL RESISTANCE VALUES IN OHM. k=1,000 OHM M=1,000,000 OHM
ALL CAPACITANCE VALUES IN MICRO FARAD. P=MICRO-MICRO FARAD
EACH VOLTAGE AND CURRENT ARE MEASUERD AT NO SIGNAL INPUT
CONDITION.
CIRCUIT AND PARTS ARE SUBJECT TO CHANGE WITHOUT PRIOR
NOTICE.
WARNING:
Parts marked with this symbol have critical characteristics.
Use ONLY replacement parts recommended by the manufacture.
CAUTION:
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 card is less than 460 kohms, the unit is defective.
WARNING:
DO NOT return the unit to the customer until the problem is located and
corrected.
SCHEMATIC DIAGRAMS (3/15)
1U-3320 (3/4) AUDIO/DSP UNIT
+ B LINE
SIGNAL
+ 5V
+ 3.3V
+ 5V
A
C
B
D

65
12 3 45678
A
B
C
D
E
SCHEMATIC DIAGRAMS (3/15)
F
G
H
9 10 11
AVR-3801
NOTICE
ALL RESISTANCE VALUES IN OHM. k=1,000 OHM M=1,000,000 OHM
ALL CAPACITANCE VALUES I N MICRO FARAD. P=MICRO-MICRO FARAD
EACH VOLTAGE AND CURRENT ARE MEASUERD AT NO SIGNAL INPUT
CONDITION.
CIRCUIT AND PARTS ARE SUBJECT TO CHANGE WITHOUT PRIOR
NOTICE.
WARNING:
Parts marked with this symbol have critical characteristics.
Use ONLY replacement parts recommended by the manufacture.
CAUTION:
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 card is less than 460 kohms, the unit is defective.
WARNING:
DO NOT return the unit to the customer until the problem is located and
corrected.
SCHEMATIC DIAGRAMS (3/15)
1U-3320 (3/4) AUDIO/DSP UNIT
+ B LINE
SIGNAL
+ 5V
+ 3.3V
+ 5V

65
12 3 45678
A
B
C
D
E
SCHEMATIC DIAGRAMS (3/15)
F
G
H
9 10 11
AVR-3801
NOTICE
ALL RESISTANCE VALUES IN OHM. k=1,000 OHM M=1,000,000 OHM
ALL CAPACITANCE VALUES I N MICRO FARAD. P=MICRO-MICRO FARAD
EACH VOLTAGE AND CURRE NT ARE MEASUERD AT NO SIGNAL INPUT
CONDITION.
CIRCUIT AND PARTS ARE SUBJECT TO CHANGE WITHOUT PRIOR
NOTICE.
WARNING:
Parts marked with this symbol have critical characteristics.
Use ONLY replacement parts recommended by the manufacture.
CAUTION:
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 card is less than 460 kohms, the unit is defective.
WARNING:
DO NOT return the unit to the customer until the problem is located and
corrected.
SCHEMATIC DIAGRAMS (3/15)
1U-3320 (3/4) AUDIO/DSP UNIT
+ B LINE
SIGNAL
+ 5V
+ 3.3V
+ 5V

65
12 3 45678
A
B
C
D
E
SCHEMATIC DIAGRAMS (3/15)
F
G
H
9 10 11
AVR-3801
NOTICE
ALL RESISTANCE VALUES IN OHM. k=1,000 OHM M=1,000,000 OHM
ALL CAPACITANCE VALUES I N MICRO FARAD. P=MICRO-MICRO FARAD
EACH VOLTAGE AND CURRE NT ARE MEASUERD AT NO SIGNAL INPUT
CONDITION.
CIRCUIT AND PARTS ARE SUBJECT TO CHANGE WITHOUT PRIOR
NOTICE.
WARNING:
Parts marked with this symbol have critical characteristics.
Use ONLY replacement parts recommended by the manufacture.
CAUTION:
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 card is less than 460 kohms, the unit is defective.
WARNING:
DO NOT return the unit to the customer until the problem is located and
corrected.
SCHEMATIC DIAGRAMS (3/15)
1U-3320 (3/4) AUDIO/DSP UNIT
+ B LINE
SIGNAL
+ 5V
+ 3.3V
+ 5V

65
12 3 45678
A
B
C
D
E
SCHEMATIC DIAGRAMS (3/15)
F
G
H
9 10 11
AVR-3801
NOTICE
ALL RESISTANCE VALUES IN OHM. k=1,000 OHM M=1,000,000 OHM
ALL CAPACITANCE VALUES I N MICRO FARAD. P=MICRO-MICRO FARAD
EACH VOLTAGE AND CURRE NT ARE MEASUERD AT NO SIGNAL INPUT
CONDITION.
CIRCUIT AND PARTS ARE SUBJECT TO CHANGE WITHOUT PRIOR
NOTICE.
WARNING:
Parts marked with this symbol have critical characteristics.
Use ONLY replacement parts recommended by the manufacture.
CAUTION:
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 card is less than 460 kohms, the unit is defective.
WARNING:
DO NOT return the unit to the customer until the problem is located and
corrected.
SCHEMATIC DIAGRAMS (3/15)
1U-3320 (3/4) AUDIO/DSP UNIT
+ B LINE
SIGNAL
+ 5V
+ 3.3V
+ 5V

AVR-3801
66
11
10
9
8
7
6
5
4
A
B
C
D
E
SCHEMATIC DIAGRAMS (4/15)
F
G
H
321
NOTICE
ALL RESISTANCE VALUES IN OHM. k=1,000 OHM M=1,000,000 OHM
ALL CAPACITANCE VALUES I N MICRO FARAD. P=MICRO-MICRO FARAD
EACH VOLTAGE AND CURRE NT ARE MEASUERD AT NO SIGNAL INPUT
CONDITION.
CIRCUIT AND PARTS ARE SUBJECT TO CHANGE WITHOUT PRIOR
NOTICE.
WARNING:
Parts marked with this symbol have critical characteristics.
Use ONLY replacement parts recommended by the manufacture.
CAUTION:
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 card is less than 460 kohms, the unit is defective.
WARNING:
DO NOT return the unit to the customer until the problem is located and
corrected.
SCHEMATIC DIAGRAMS (4/15)
1U-3320 (4/4) AUDIO DSP UNIT
- B LINE
+ B LINE
SIGNAL
- 15V
+ 5V
+ 15V
+ 5V
A
C
B
D

AVR-3801
66
11
10
9
8
7
6
5
4
A
B
C
D
E
SCHEMATIC DIAGRAMS (4/15)
F
G
H
321
NOTICE
ALL RESISTANCE VALUES IN OHM. k=1,000 OHM M=1,000,000 OHM
ALL CAPACITANCE VALUES I N MICRO FARAD. P=MICRO-MICRO FARAD
EACH VOLTAGE AND CURRE NT ARE MEASUERD AT NO SIGNAL INPUT
CONDITION.
CIRCUIT AND PARTS ARE SUBJECT TO CHANGE WITHOUT PRIOR
NOTICE.
WARNING:
Parts marked with this symbol have critical characteristics.
Use ONLY replacemen t parts recommended by the manufacture.
CAUTION:
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 card is less than 460 kohms, the unit is defective.
WARNING:
DO NOT return the unit to the customer until the problem is located and
corrected.
SCHEMATIC DIAGRAMS (4/15)
1U-3320 (4/4) AUDIO DSP UNIT
- B LINE
+ B LINE
SIGNAL
- 15V
+ 5V
+ 15V
+ 5V