Denon AVR-3801 Service Manual page 49

SCHEMATIC DIAGRAMS (10/15)
1 2 3
+ 5V
+ 5V
A
+ 6.4V
+ 20V
+ 15V
- 15V
C
4 5
+ 9V
+ 10.1V
+ 24.6V
+ 25.7V
WARNING:
Parts marked with this symbol
Use ONLY r eplacement parts recommended by the manufacture.
CAUTION:
Before returning the unit to the customer, make sure you make either (1) a
NOTICE
leakage current check or (2) a line to chassis resistance check. If the leakage
ALL RESISTANCE VALUES IN OHM. k=1,000 OHM M=1,000,000 OHM
current exceeds 0.5 milliamps, or if the resistance from chassis to either side
ALL CAPACITANCE VALUES IN MICRO FARAD. P=MICRO-MICRO FARAD
of the power card is less than 460 kohms, the unit is defective.
EACH VOLTAGE AND CURRENT ARE MEASUERD AT NO SIGNAL INPUT
WARNING:
CONDITION.
DO NOT return the unit to the customer until the problem is located and
CIRCUIT AND PARTS ARE SUBJECT TO CHANGE WITHOUT PRIOR
corrected.
NOTICE.
6 7 8
have critical characteristics.
SCHEMATIC DIAGRAMS (10/15)
1U-3319-1 REGULATOR UNIT
1U-3319-4,5 DIGITAL INPUT UNIT
1U-3319-11/1U3319-12 VOLTAGE SELECT UNIT
1U-3319-8 PT902 UNIT
1U-3319-9 PT903 UNIT
10
9
B
+ 5V
D
+
-
SIGNAL
AVR-3801
11
A
B
C
D
E
F
B LINE
B LINE
G
H
72