Denon AVR-1804 Service Manual page 88

1 2
SCHEMATIC DIAGRAMS (10/11)
CN303
R344
10K
R361
10K
C325
100P-J
1 2 3 4 5 6 7 8
IC302
BU2090F
16 15 14 13 12 11 10 9
C309
22N-K
C319
47/16
E3 ONLY JAPAN ONLY
SW301A SW301C
STATUS TONE_CONTROL
E2:RT
SW302A SW302C
DIMMER TONE_DEFEAT
E2:PTY
SW303A SW303C
VIDEO_SEL SURR_MODE
E2:RDS
SW304A SW304C
TUNING_UP SURR_PARA
SW305A SW305C
DIRECT/STEREO
TUNING_DW
SW306A SW306C
PRESET_UP 5CH/6CH_STEREO
SW307A SW307C
PRESET_DW DOLBY/DTS
SW308A SW308C
SHIFT SURR_BACK
SW309A SW309C
BAND SPK_B
R354
C310
3
4
TO CPU/VOL UNIT
CP303
1 2
ZD301
MTZ6.8B
Q218
2SA933S
RMC301
REMOTE
Q203
DTA144EK R335
10
Q307
DTC114YK
Q306
DTC114EK
SW302B
R301
EXT.IN
100
SW303B
ANALOG
R302
100
SW304B
INPUT_MODE
SW305B
R306
100
SPK_A
R305
100
R330 ZD311
100
MTZ5.6B
R331
FUN_DW ZD310
FUN_DW
100
MTZ5.6B
FUN_UP
47K FUN_UP
+5V +5V
P_SW
P_SW
47N
GND
GND
R391 R392 R393
KEY3 KEY3
H/P SENSE 3K3 4K7 7K5
H/P SENSE
REC_SELECT SOURCE
E3:MAIN
FUNCTION S/W BOARD
5
FROM TRANS UNIT
3
FRONT BOARD
FLT301
16-ST-66GNK
TUNED STEREO REC PHONO CD TUNER AUX
V_AUX
RDS AUTO ZONE2 VCR -1 -2 -3
CH
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
Q305
DTA144EK
G1
48 47 46 45 44 43 42 41 40
G6 49 G6
G5
50 G5
Q304 G4 51 G4
DTC144EK
G3 52 G3
D307
G2
53 G2
KDS160
54 G1
IC301
55 VFL
LC75721NE
56 TEST
R352
57 VSS
C308 10K
30P-J
58 OSC0
59 OSC1
60 VDD
R316 470
61 RST
R317 470
62 CE
R318 470
63 CLK
R319 470
64 DT
C307
1 2 3 4 5 6 7 8 9
100P-J
C306
R304 47K
100P-J
C305
1N-K
R303 47K
R307 47K
R308 47K
FUNCTION SEL
ENCODER
R328
47K
VEC303
C301F
1/50 H/P / POWER S/W BOARD
CP392
R329 47K P_SW
CN392 C904H
GND
P_SW
22N
GND
GND
H/P SENSE
GND
R903H
H/P SENSE
H/P_L
470(2)
GND
H/P_R
R904H
CN901
470(2)
AVR-1804/884 / AVC-1880
6
7
DVD / VDP TV / DBS
CDR / TAPE -1 -2
PRO LOGIC II
DIGITAL
DIGITAL ANALOG
33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58
39 38 37 36 35 34 33
AM32 32 AM32
AM31
AM31 31
AM30 30 AM30
AM29 29 AM29
AM28
AM28 28
AM27 27 AM27
AM26 26 AM26
25 AM25
AM25
AM24 24 AM24
AM23 23 AM23
AM18
AM22 22 AM22
Q300
AM21 21 AM21
DTA144EK
AM20 20 AM20
AM19 19 AM19
AM18 18
Q303
D305
17 17
KDS160 DTC144EK
10 11 12 13 14 15 16
AM17
Q301
DTA144EK
D306
Q302
KDS160
DTC144EK
R349
470
C327
4.7/50 R338
470
GND
GND
C326
4.7/50
C324
4.7/50
G901
4.7/50
C333
JACK301
4.7/50
S-VIDEO FRONT
C334
SCHEMATIC DIAGRAMS (10/11)
FRONT UNIT / SWITCH UNIT / HEAD
PHONE UNIT / FRONT-S-VIDEO UNIT
REC SIGNAL LINE
88
8
A
B
C
D
FRONT_AUDIO_R
FRONT_AUDIO_L
V-GND
FRONT_VDO_IN
GND
C-SIGNAL
Y-SIGNAL E
88