Denon AVR-1804 Service Manual page 9

Pin
Pin Name
No.
24 RELAY SPK A
25 RELAY SURR
26 RELAY CNT
27 RELAY H/P
28 FUNC UP
29 H/P DETECT
30 FUNC DOWN
31 NC
32 CNT MUTE
33 NC
34 SURR MUTE
35 9459 STB
36 MULTI SB RLY
37 RELAY SPK B
38 FL DRV RESET
39 RELAY POWER
40 RESET
41 GND
42 XTAL
43 EXTAL
44 FL DRV CE
45 FL DRV DATA
46 FL DRV/2090 CLK
47 2090 DATA
48 VOL DOWN
49 VOL UP
50 SEL DOWN
51 SEL UP
52 AV
SS
53 V
REF
54 AV
DD
55 89057 INT
56 GND
57 STEP OPT
58 SET OPT
59 GND
60 KEY IN3
61 KEY IN2
62 KEY IN1
63 9K/10K STEP
64 PROTECT
65 C-VIDEO DET
66 M32 SCLK
67 1837 CE
68 M32 RESET
69 S-VIDEO DET
70 STBY LED
71 NC
72 NC
73 74781 CS
74 74781 SCLK
75 SURR BACK MUTE
76 2090 CLK2
I/O
O FRONT A RELAY
O SURROUND RELAY
O CENTER RELAY
O H/P RELAY
I ENCODER INPUT(FUNCTION)
I H/P DETECT
I ENCODER INPUT(FUNCTION)
-
O CENTER MUTE
-
O SURROUND MUTE
O KIC9459 CONTROL STB
O ZONE2/SURROUND BACK : SELECTION RELAY
- FRONT B RELAY
O LC75721NE RESET
O POWER RELAY
I RESET
I
-
-
O LC75721NE CE
O LC75721NE DATA
O CONTROL CLOCK
O BU2090F DATA
I ENCODER INPUT(VOLUME)
I ENCODER INPUT(VOLUME)
I ENCODER INPUT(SELECT)
I ENCODER INPUT(SELECT)
-
-
-
LC89057 INT
-
-
I AREA SELECT
I MODEL SELECT
-
I KEY INPUT
I KEY INPUT
I KEY INPUT
I TUNER STEP SELECT
I PROTECTION
I Composite Signal detect input (H: Signal input)
O MELODY32 CLOCK
O CODEC CE
O MELODY32 RESET
I S Signal detect input (H: Signal input)
O STANDBY LED
-
-
LC74781 CONTROL ENABLE
O
O LC74781 CONTROL CLOCK
O SURROUND BACK MUTE
O BU2090 CONTROL CLOCK2 (VIDEO)
AVR-1804/884 / AVC-1880
Function
9
9