Pre-Amp Board - Denon AVR-785 Service Manual

SCHEMATIC DIAGRAMS (5/13)
1 2 3
TO PRE-OUT BOARD
14 13 12 11 10 9 8 7 6 5 4
Q501SBRM
KTC2874B
R502SBR
100K
Q501SBR
KTC2874B
Q502SBR
KSA992F
Q503SBR
KSA992F
C506SBR
100/10
R511SBR R511SBL
47(1/4) 47(1/4)
Q504SBR
KSC1845F

PRE-AMP BOARD

MAIN_-B
MAIN_-B
MAIN_+B
MAIN_+B
GND
GND
DC-PROTECT
OVER-PROTECT
NF6
GND
SBL
GND
NF7
GND
SBR
2CH-AMP BOARD
4 5
TO 2CH-AMP BOARD
3 2 1 15 14 13 12 11 10
CN902 CN557
C501M
10/50
Q501SBLM
KTC2874B
R502SBL
100K
Q501SBL
KTC2874B
Q502SBL
KSA992F
Q503SBL
KSA992F
C506SBL
100/10
R511FR
47(1/4)
Q504SBL
KSC1845F
Q504FR
KSC1845F
CN505
10 9 8 7 6
TO MAIN BOARD
R104SBR C103SBR Q101SBR
5K6(1) 100P-500V 2SD2390 R115SBR
R105SBR R112SBR
5K6(1) 10K
VR107SBR R103SBR
VR1K(B) 3K
L101SBR
0.5mH
R118SBR
Q103SBR 10(1)
2SD947F
Q102SBR
C104SBR
2SB1560
100P-500V
6 7
9 8 7 6 5 4 3 2 1 4
CP554B
Q501FRM Q501SRM
KTC2874B KTC2874B
R502FR R502SR
100K 100K
Q501FR Q501SR
KTC2874B KTC2874B
Q502FR Q502SR
KSA992F KSA992F
Q503FR Q503SR
KSA992F KSA992F
C506FR C506SR
100/10 100/10
R511SR R511C
47(1/4) 47(1/4)
Q504SR
KSC1845F
CN502
5 4 3 2 1 7 6 5 4 3 2 1
R104SBL C103SBL Q101SBL
5K6(1) 100P-500V 2SD2390
2K2
R105SBL R112SBL
5K6(1) 10K
VR107SBL R103SBL
VR1K(B) 3K
Q103SBL
2SD947F
Q102SBL
C104SBL
2SB1560
100P-500V
76
8 9
FROM CNT BOARD
3 2 1 14 13 12 11 10 9 8 7 6 5 4 3 2 1
CP554A
Q501CM Q501SLM
KTC2874B KTC2874B
R502C R502SL
100K 100K
Q501C Q501SL
KTC2874B KTC2874B
Q502C Q502SL
KSA992F KSA992F
Q503C Q503SL
KSA992F KSA992F
C506C C506SL
100/10 100/10
R511SL
47(1/4)
Q504C Q504SL
KSC1845F KSC1845F
CN503 CN501
5 4 3 2 1 9 8 7 6 5 4 3 2 1
R115SBL
2K2
SBR
SBR
L101SBL
SBL
0.5mH
SBL
R118SBL
10(1)
SCHEMATIC DIAGRAMS (5/13)
PRE-AMP UNIT
(For ALL MODEL)
AVR-1905/785 AVC-1590
AVR-1905/785 AVC-1590
10 11
A
B
Q501FLM
KTC2874B
C
R502FL
100K
Q501FL
KTC2874B
D
Q502FL
KSA992F
Q503FL
KSA992F
C506FL
100/10
E
R511FL
47(1/4)
Q504FL
KSC1845F
CN504
5 4 3 2 1
F
G
H