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For U.S.A., Canada, Europe,
Asia, Taiwan R.O.C., Korea
& Japan model
Ver. 1
SERVICE MANUAL
MODEL AVR-1906/786
AV SURROUND RECEIVER
AVC-1620
AV SURROUND AMPLIFIER
For purposes of improvement, specifications and
design are subject to change without notice.
Please use this service manual with referring to the
operating instructions without fail.
Some illustrations using in this service manual are
slightly different from the actual set.
TOKYO ,JAPAN
Denon Brand Company, D&M Holdings Inc.
X0239 V.01 DE/CDM 0506
AVR-1906 / AVR-786 / AVC-1620
SAFETY PRECAUTIONS
The following check should be performed for the continued protection of the customer and service technician.
LEAKAGE CURRENT CHECK
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 cord is less than 460 kohms, the unit is defective.
500V
1M
(1)
(2)
(1)
(2)
2
AVR-1906 / AVR-786 / AVC-1620
DIMENSION
3
AVR-1906 / AVR-786 / AVC-1620
CAUTION IN SERVICING
Initializing AV SURROUND RECEIVER
AV SURROUND RECEIVER initialization should be performed
when the µcom, peripheral parts of µcom, and Digital P.W.B. are
replaced.
1. Switch off the unit.
2. Hold the following SPEAKERS-A button and SPEAKERS-B
button, and switch on the unit.
3. Check that the entire display is flashing with an interval of
about 1 second, and release your fingers from the 2 buttons
and the microprocessor will be initialized.
Note: If step 3 does not work, start over from step 1.
All user settings will be lost and this factory setting will
be recovered when this initialization mode.
So make sure to memorize your setting for restoring
after the initialization.
4
AVR-1906 / AVR-786 / AVC-1620
ADJUSTMENT
Audio Section
Idling Current
Required measurement equipment: DC Voltmeter
1. Preparation
(1) Avoid direct blow from an air conditioner or an electric
fan, and adjust the unit at normal room temperature 15 °C
~ 30 °C (59 °F ~ 86 °F).
(2) Presetting
· POWER (Power source switch) OFF
· SPEAKER (Speaker terminal) No load
(Do not connect speaker, dummy resistor, etc.)
2. Adjustment
(1) Remove top cover and set VR101, VR102, VR103,
VR104, VR105, on Amp. Unit, VR107SBL,VR107SBR
on SURR.-BACK ch Amp. Unit at fully counterclockwise
( ) position.
(2) Connect DC Voltmeter to test points (FRONT-Lch:
TP104, FRONT-Rch: TP105, CENTER ch: TP103, SUR-
ROUND-Lch: TP101, SURROUND-Rch: TP102, SUR-
ROUND-BACK Lch: TP106,SURROUND-BACK Rch:
TP107).
(3) Connect power cord to AC Line, and turn power switch
"ON".
(4) Presetting.
MASTER VOLUME : "---" counterclockwise ( min.)
MODE : 7CH STEREO
FUNCTION : CD
(5) Within 2 minutes after the power on, turn VR101 clock-
wise ( ) to adjust the TEST POINT voltage to 1.5 mV
± 0.5 mV DC.
(6) After 10 minutes from the preset above, turn VR101 to
set the voltage to 2.5 mV ± 0.5 mV DC.
(7) Adjust the Variable Resistors of other channels in the
same way.
VR104
F Lch
TP104
VR101,TP101
S Lch
TP107
S Back Rch
VR107SBR
TP106
S Back Lch
VR107SBL
VR103,TP103
C ch
VR102
S Rch
DC Voltmeter TP102
VR105
F Rch
TP105
5
AVR-1906 / AVR-786 / AVC-1620
Video Section
Component Video Level Adjustment
Required measurement equipment etc.: Oscilloscope, DVD
VIDEO PLAYER (ex: DVD-1500)
Test disc: DVD T-S01
1. Preparation
(1) Avoid direct blow from an air conditioner or an electric
fan, and adjust the unit at normal room temperature 15 °C
~ 30 °C (59 °F ~ 86 °F).
(2) Playback the color-bar 75% of the Test Disc (Title 12) us-
ing the DVD Video Player, and check that Y and C levels
of the S terminal output are within the specified output
levels.
If they are out of the specified levels, adjust with the vari-
able resister inside of the unit.
(3) Presetting
· POWER (Power source switch) OFF
· SPEAKER (Speaker terminal) No load
(Do not connect speaker, dummy resistor, etc.)
· DVD (Video terminal) No input
2. Adjustment
(1) Remove top cover and set VR901, VR902, VR903, on C-
S VIDEO2 Unit at fully counterclockwise ( ).
(2) Connect a pin-plug terminated with 75-ohms to Y (Cb, Cr)
of the Component Video Monitor Output, and hook up the
Oscilloscope's probe to both ends of the pin-plug.
(3) Connect S terminal output of the DVD Player with the
DVD input terminal of the Receiver.
(4) Connect power cord to AC Line, and turn power switch
"ON".
(5) Presetting.
· FUNCTION: DVD
· Playback the color-bar 75% of the Test Disc (Title 12)
(6) Turn VR902 clockwise ( ) to adjust the COMPONENT
Video Y voltage (except H. Sync) to 714 ± 50 mVp-p. (Re-
fer to Fig. 1)
(7) Adjust the Variable Resistors of Cr: VR901 and Cb:
VR903 in the same way. (Refer to Fig. 2, 3)
Cb,Cr: 486 ± 50 mVp-p. (U.S.A. & Canada model)
525 ± 50 mVp-p. (Others)
6
AVR-1906 / AVR-786 / AVC-1620
Oscilloscope
MONITOR OUT
(Y,Cb,Cr)
VR903
Cb
Cr Y
VR901 VR902
Video Section
7
AVR-1906 / AVR-786 / AVC-1620
Volts I R E : F LT Y- S i g n a l
100.0
0.5 714±50mVp-p
50.0
0.5 0.0
-20.0 -10.0 0.0 10.0 20.0 30.0 40.0 50.0 60.0
Fig.1 Component Video Y signal
Vo l t s I R E : F LT
0.5
50.0
486±50mVp-p (U.S.A. & Canada model)
525±50mVp-p (Other model)
0.0 0.0
-50.0
-0.5
0.0 20.0 40.0 60.0 80.0
Fig.2 Cb signal
Vo l t s I R E : F LT
0.5
50.0
486±50mVp-p (U.S.A. & Canada model)
525±50mVp-p (Other model)
0.0 0.0
-50.0
-0.5
0.0 20.0 40.0 60.0 80.0
Fig.3 Cr signal
8
AVR-1906 / AVR-786 / AVC-1620
BLOCK DIAGRAM
9
AVR-1906 / AVR-786 / AVC-1620
LEVEL DIAGRAMS (1/2)
10
AVR-1906 / AVR-786 / AVC-1620
LEVEL DIAGRAMS (2/2)
11
AVR-1906 / AVR-786 / AVC-1620
SEMICONDUCTORS
Only major semiconductors are shown, general semiconductors etc. are omitted to list.
1. IC's
M30622MEP (IC201)
PI4/INT1/CS1
PI3/TO0/ADJ
PI5/SCK1
PK2/TEX
PI1/RMC
PI2/NMI
PK1/TX
PC6
PC7
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
VDD
VSS
NC
100
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
PC5 1 80 PI6/SO1
PC4 2 79 PI7/SI1
PC3 3 78 PE0/INT0
PC2 4 77 PE1/INT2
PC1 5 76 PE2/PWM0
PC0 6 75 PE3/PWM1
PB7/SI2 7 74 PE4
PB6/SO2 8 73 PE5
PB5/SCK2 9 72 PE6
PB4/TO2 10 71 PE7
PB3 11 70 PG0/TxD
PB2 12 69 PG1/RxD
PB1 13 68 PG2/EC0
PB0 14 67 PG3/EC1
PJ7 15 66 PG4/EC2
PJ6 16 TOP VIEW 65 PG5/INT3
PJ5 17 64 PG6/INT4
PJ4 18 63 PG7/CINT
PJ3 19 62 AN0
PJ2 20 61 AN1
PJ1 21 60 AN2
PJ0 22 59 AN3
PD7 23 58 PF0/AN4
PD6 24 57 PF1/AN5
PD5 25 56 PF2/AN6
PD4 26 55 PF3/AN7
PD3 27 54 AVDD
PD2 28 53 AVREF
PD1 29 52 AVSS
PD0 30 51 PF4/AN8
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
PH7
PH6
PH5
PH4
PH3
PH2
PH1
PH0
PK7/TO1
RST
VSS
XTAL
EXTAL
PK6/CS0
PK5/SI0
PK4/SO0
PK3/SCK0
PF7/AN11
PF6/AN10
PF5/AN9
M30622MEP Terminal Function
PIN No. PIN NAME I/O FUNCTION
1 SW_SUM O SW SUMMING CONTROL
2 4094CLK O BU4094(IC551Å`3) CLOCK
3 BU2090_CLK(VIDEO) O BU2090(IC604,608) CLOCK
4 BU2090/LC74781_DATA1 O BU2090(IC608) DATA/LC74781(IC603) SDATA IN
5 BU2090/LC74781_DATA2(CLK) O BU2090(IC604) DATA/LC74781(IC603) SCLK
6 REMOCON I REMOCON SIGNAL DATA INPUT
7 AD1837_SDIN(OVERLOAD) I AD1837(IC808) COUT SERIAL DATA INPUT
8 BYTE GND GND
9 CNVSS - UP GRADE PIN (TP201 CNVSS)
10 BU2090/4094_DATA O BU4094(IC551Å`3) DATA /BU2090ÅiIC303) DATA
11 LC75721_RESET O LC75721(IC301) RESET CONTROL
12 RESET I u-COM RESET SIGNAL INPUT
13 X-OUT O OSILATOR CONNECTION
14 Vss GND GND
15 X-IN I OSILATOR CONNECTION
16 Vcc1(+5V) 5V POWER 5V
17 NC I PULL DOWN
18 FLAG0 I EPROM chip select control for DSP
19 LC89057_INT I LC89057(IC807) INT SIGNAL INPUT
20 PROTECTION I PROTECTION SIGNAL INPUT
21 LC75721/BU2090_CLK O BU2090(IC303) CLOCK/ LC75721(IC301) CLOCK
22 LC75721_DATA O LC75721(IC301) DATA
23 LC75721_CE O LC75721(IC301) CHIP ENABLE
12
AVR-1906 / AVR-786 / AVC-1620
PIN No. PIN NAME I/O FUNCTION
24 TC9273_STB O TC9273-004(IC703) STB
25 TC9273_DATA O TC9273-004(IC703) DATA
26 TC9273_CLK O TC9273-004(IC703) CLOCK
27 NC I/O OPEN
28 MIC_RELAY O MIC RELAY (RLY701) CONTROL
29 TC90A69/TA1270_CLK O TC90A69(IC612) SCLOCK/TA1270BF(IC901) SCLOCK
30 TC90A69/TA1270_DATA I/O TC90A69(IC612) SDATA/TA1270BF(IC901) SDATA
31 RS232C_TX O RS232C SIGNAL OUTPUT
32 RS232C_RX I RS232C SIGNAL INPUT
33 NC O GND
34 NC O GND
35 PLL_DATA_IN I TUNER DATA IN
36 PLL_DATA_OUT O TUNER DATA OUT
37 PLL_CLK O TUNER PLL CLOCK
38 PLL_CE O TUNER PLL CHIP ENABEL
39 TUNED I TUNED SIGNAL INPUT
40 STEREO I STEREO SIGNAL INPUT
41 RS232C_UPGRADE(EPM) I UP GRADE PIN (TP201 EPM)
42 VOL_ENCORDER_UP I MASTER VOLUME ENCODER(VEC301)
43 VOL_ENCORDER_DOWN I MASTER VOLUME ENCODER(VEC301)
44 SELECT_UP I SELECT ENCONDER(VEC302)
45 SELECT_DOWN I SELECT ENCONDER(VEC302)
46 RS232C-UPGRADE(CE) I UP GRADE PIN (TP201 CEÅj
47 POWER_DOWN I POWER DOWN CONTROL INPUT
48 RDS_DATA I TDA7330BDÅiIC202Åj RDDR SIGNAL INPUT
49 ERR_MUTE O ERROR MUTE
50 BSE O DIGITAL SIGNAL MUTE
51 LC89057_EMPHA I LC89057(IC807) PRE EMPHASIS INFOMATION SIGNAL INPUT
52 SHARC_SDIN I SHARC(IC804) SERIAL DATA INPUT
53 LC89057_SDIN I LC89057(IC807) D0 SIGNAL INPUT
54 EPPROM_RESET O FLASH ROM(IC805) RESET
55 LC89057_RESET O LC89057(IC807) RESET
56 SHARC_CE O SHARC(IC804) CHIP ENABEL
57 SHARC_SDOUT O CHARC(IC804) SERIAL DATA OUT
58 LC89057_CE O LC89057(IC807) CHIP ENABLE
59 LC89057_AD1837_SDOUT O LC89057(IC807) D1 SIGNAL / AD1837(IC808) CIN SIGNAL
60 LC89057_AD1837_SCLK O LC89057(IC807) CLOCK/ AD1837(IC808) CCLOCK
61 AD1837_RESET O AD1837(IC808) RESET SIGNAL OUT (TO IC821)
62 Vcc2(+5V) 5V POWER 5V
63 SHARC_SCLK O SHARC(IC804) SPICLK
64 Vss GND GND
65 SHARC_RESET O SHARC(IC804) RESET SIGNAL
66 AD1837_CE O AD1837(IC808) CLATCH
67 FLAG3 I Special flag for ROM updata
68 FLAG2 I DSP operation check flag
69 FLAG1 I NON USE
70 H/P_DETECT I HEAD PHONE DETECT
71 FUNCTION_UP I FUNCTION ENCODER (VEC303)
72 FUNCTION_DOWN I FUNCTION ENCODER (VEC303)
73 RDS_CLK O TDA7332BD(IC202) CLOCK FOR RDS
74 POWER_KEY I POWER SWICH SIGNAL INPUT
75 MIC DETECT I MIC DETECTION
76 POWER_RELAY O FRONT PANEL POWER CONTROL
77 ST/BY_LED(RED) O STBY LED RED CONTROL
78 VCR_MUTE O VCR OUT(REC OUT) OUTPUT CONTROL
79 BD3811K1_CLK O BD3811K1(IC701) CLOCK/BD3812F (IC702) CLOCK
13
AVR-1906 / AVR-786 / AVC-1620
PIN No. PIN NAME I/O FUNCTION
80 BD3811K1_DATA O BD3811K1(IC701) DATA/BD3812F(IC702) DATA
81 MUTE_POWER O MUTE POWER CONTROL
82 BU4904_STB(RELAY) O BU4094(IC551) STB
83 BU4094_STB(RELAY&MUTE) O BU4094(IC553) STB
84 BU4094_STB(MUTE) O BU4094(IC552) STB
85 S-MON_DET I S-MONITOR DETECT
86 COMP_DET I COMPONENT SIGNAL INPUT DETECT
87 C_DET I CONPOSIT SIGNAL INPUT DETECT
88 S_DET I S VIDEO SIGNAL INPUT DETECT
89 NC O OPEN
90 KEY_IN1 I KEY1 SIGNAL INPUT
91 KEY_IN2 I KEY2 SIGNAL INPUT
92 KEY_IN3 I KEY3 SIGNAL INPUT
93 SET_OPTION I MODEL OPTION SELECT
94 BAND_OPTION I AREA OPTION SELECT
95 74HC151_A O TC74HC151A (IC827) CONTROL COAXIAL SIGNAL SELECT
96 AVss GND GND
97 SEL_CLK O SEL_CLK
98 VREF(+5V) 5V VREF
99 AVcc(+5V) 5V POWER 5V
100 LC74781_CE O LC74781(IC603) CS
14
AVR-1906 / AVR-786 / AVC-1620
ADSP-21266SKSTZ-1B (IC804)
144 109
1 108
PIN 1 INDICATOR
TOP VIEW
36 73
37 72
ADSP-21266SKSTZ-1B Terminal Function
LQFP LQFP LQFP LQFP
Pin Name Pin # Pin Name Pin # Pin Name Pin # Pin Name Pin #
VDDINT 1 VDDINT 37 VDDEXT 73 GND 109
CLKCFG0 2 GND 38 GND 74 VDDINT 110
CLKCFG1 3 RD 39 VDDINT 75 GND 111
BOOTCFG0 4 ALE 40 GND 76 VDDINT 112
BOOTCFG1 5 AD15 41 DAI_P10 (SD2B) 77 GND 113
GND 6 AD14 42 DAI_P11 (SD3A) 78 VDDINT 114
VDDEXT 7 AD13 43 DAI_P12 (SD3B) 79 GND 115
GND 8 GND 44 DAI_P13 (SCLK23) 80 VDDEXT 116
VDDINT 9 VDDEXT 45 DAI_P14 (SFS23) 81 GND 117
GND 10 AD12 46 DAI_P15 (SD4A) 82 VDDINT 118
VDDINT 11 VDDINT 47 VDDINT 83 GND 119
GND 12 GND 48 GND 84 VDDINT 120
VDDINT 13 AD11 49 GND 85 RESET 121
GND 14 AD10 50 DAI_P16 (SD4B) 86 SPIDS 122
FLAG0 15 AD9 51 DAI_P17 (SD5A) 87 GND 123
FLAG1 16 AD8 52 DAI_P18 (SD5B) 88 VDDINT 124
AD7 17 DAI_P1 (SD0A) 53 DAI_P19 (SCLK45) 89 SPICLK 125
GND 18 VDDINT 54 VDDINT 90 MISO 126
VDDINT 19 GND 55 GND 91 MOSI 127
GND 20 DAI_P2 (SD0B) 56 GND 92 GND 128
VDDEXT 21 DAI_P3 (SCLK0) 57 VDDEXT 93 VDDINT 129
GND 22 GND 58 DAI_P20 (SFS45) 94 VDDEXT 130
VDDINT 23 VDDEXT 59 GND 95 AVDD 131
AD6 24 VDDINT 60 VDDINT 96 AVSS 132
AD5 25 GND 61 FLAG2 97 GND 133
AD4 26 DAI_P4 (SFS0) 62 FLAG3 98 CLKOUT 134
VDDINT 27 DAI_P5 (SD1A) 63 VDDINT 99 EMU 135
GND 28 DAI_P6 (SD1B) 64 GND 100 TDO 136
AD3 29 DAI_P7 (SCLK1) 65 VDDINT 101 TDI 137
AD2 30 VDDINT 66 GND 102 TRST 138
VDDEXT 31 GND 67 VDDINT 103 TCK 139
GND 32 VDDINT 68 GND 104 TMS 140
AD1 33 GND 69 VDDINT 105 GND 141
AD0 34 DAI_P8 (SFS1) 70 GND 106 CLKIN 142
WR 35 DAI_P9 (SD2A) 71 VDDINT 107 XTAL 143
VDDINT 36 VDDINT 72 VDDINT 108 VDDEXT 144
15
AVR-1906 / AVR-786 / AVC-1620
LC89057W (IC807)
EMPHA/UO AUDIO/VO INT CL CE DI XMODE
32 33 35 40 39 38 41
EMPHA/UO
AUDIO/VO
DGND
DGND
XMCK
RERR
DVDD
DVDD
XOUT
CKST
XIN
INT
RXOUT 1 C bit, U bit Microcontroller
I/F 37 DO
36
35
34
33
32
31
30
29
28
27
26
25
RX0 2
36 RERR
RX1 3 DO 37 24 SDIN
RX2 4 DI 38 23 SLRCK
Input
RX3 5 Selector Demodulation Data CE 39 22 SBCK
& Selector 21 RDATA
RX4 8 CL 40 21 RDATA
Lock Detect XMODE 41 20 RLRCK
RX5/VI 9
RX6/UI 10 DGND 42 19 DVDD
24 SDIN DVDD 43 TOP VIEW 18 DGND
TMCK/PIO0 44 17 RBCK
16 RMCK TBCK/PIO1 45 16 RMCK
LPF 13 PLL
TLRCK/PIO2 46 15 AGND
17 RBCK
Clock 20 RLRCK TDATA/PIO3 47 14 AVDD
TMCK/PIO0 44 Selector TXO/PIOEN 48 13 LPF
Modulation 22 SBCK
TBCK/PIO1 45 I/N
or 23 SLRCK
TLRCK/PIO2 46
RX6/UI 10
DVDD 11
DGND 12
Parallel Port
RXOUT 1
RX0 2
RX1 3
RX2 4
RX3 5
DGND 6
DVDD 7
RX4 8
RX5/VI 9
TDATA/PIO3 47
TXO/PIOEN 48
29 28 27 34
XIN XOUT XMCK CKST
LC89057W Terminal Function
Pin
Pin Name I/O Function
No.
1 RXOUT O Input bi-phase select data output terminal
2 RX0 I TTL compatible digital data input terminal
3 RX1 I Coaxial compatible amp built-in digital data input terminal
4 RX2 I TTL compatible digital data input terminal
5 RX3 I TTL compatible digital data input terminal
6 DGND -- Digital GND
7 DVDD -- Digital power
8 RX4 I TTL compatible digital data input terminal
9 RX5/VI I TTL compatible digital data/Validity flag input terminal for modulation
10 RX6/UI I TTL compatible digital data/User data input terminal for modulation
11 DVDD -- Digital power for PLL
12 DGND -- Digital GND for PLL
13 LPF O PLL loop filter connecting terminal
14 AVDD -- Analog power for PLL
15 AGND -- Analog GND for PLL
16 RMCK O RMCK clock output terminal (256fs, 512fs, XIN, VCO)
17 RBCK O/I RBCK clock in/output terminal (64fs)
18 DGND -- Digital GND
19 DVDD -- Digital power
20 RLRCK O/I RLRCK clock in/output terminal (fs)
21 RDATA O Serial audio data output terminal
22 SBCK O SBCK clock output terminal (32fs, 64fs, 128fs)
23 SLRCK O SLRCK clock output terminal (fs/2, fs, 2fs)
24 SDIN I Serial audio data input terminal
25 DGND -- Digital GND
26 DVDD -- Digital power
27 XMCK O Osc. amp output terminal
16
AVR-1906 / AVR-786 / AVC-1620
Pin
Pin Name I/O Function
No.
28 XOUT O X'tal osc. connecting output terminal
29 XIN I X'tal osc. connection, external clock input terminal (24.576MHz or 12.288MHz)
30 DVDD -- Digital power
31 DGND -- Digital GND
32 EMPHA/UO I/O Emphasis information/U-data output/Chip address setting terminal
33 AUDIO/VO I/O Non-PCM detect/V-flag output/ Chip address setting terminal
34 CKST I/O Clock switch transition period output/Demodulation master or slave function switching terminal
35 INT I/O Interrupt output for µcom (Interrupt factor selectable)/Modulation or general I/O switching terminal
36 RERR O PLL lock error, data error flag output
37 DO O µcom I/F, read out data output terminal (3-state)
38 DI I µcom I/F, write data input terminal
39 CE I µcom I/F, chip enable input terminal
40 CL I µcom I/F, clock input terminal
41 XMODE I System reset input terminal
42 DGND -- Digital GND
43 DVDD -- Digital power
44 TMCK/PIO0 I/O 256fs system clock input for modulation/General I/O in/output terminal
45 TBCK/PIO1 I/O 64fs bit clock input for modulation/General I/O in/output terminal
46 TLRCK/PIO2 I/O fs clock input for modulation/General I/O in/output terminal
47 TDATA/PIO3 I/O Serial audio data input for modulation/General I/O in/output terminal
48 TXO/PIOEN O/I Modulation data output/ General I/O enable input terminal
* For latch-up countermeasure, perform each power supply ON/OFF in the same timing.
BD3811K1 (IC701)
AGND10
ROUT32
ROUT31
ROUT22
ROUT21
ROUT12
ROUT11
GOUT2
AGND9
GOUT1
VIN2
VIN1
IN22
IN21
IN12
IN11
80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65
IN31 1 64 TNF2
IN32 2 63 TNF1
IN41 3 62 BNF11
TREBLE
IN42 4 61 BNF21
IN51 5 60 BNF12
BASS
IN52 6 59 BNF22
IN61 7 58 BBNF2
IN62 8 57 OUT2
IN71 9 56 BBNF1
BASS
IN72 10 BOOST 55 OUT1
IN81 11 54 AGND8
5.1ch Mode SW2 DVD
IN82 12 53 AGND7
INDVDSR 13 52 VCC
INDVDSL 14 51 AGND6
INDVDC 15 50 VEE
INDVDSW 16 49 AGND5
OUT2(+) 17 48 MUTE
LOGIC
OUT2(-) 18 47 CL
OUT1(+) 19 5.1ch Mode SW1 46 DA
5.1ch Mode SW2 DSP
OUT1(-) 20 45 DGND
IN1DSP 21 44 AGND4
IN1MIX 22 43 GOUTSR
IN2DSP 23 42 VINSR
IN2MIX 24 41 AGND3
25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
INDSPSR
INDSPSL
INDSPC
INDSPSW
AGND1
GOUTSW
VINSW
AGND2
GOUTC
VINC
OUTSW
OUTC
OUTSL
OUTSR
VINSL
GOUTSL
17
AVR-1906 / AVR-786 / AVC-1620
AD1837 (IC808)
DSDATA4
DSDATA3
DSDATA2
DSDATA1
ASDATA
ALRCLK
ODVDD
ABCLK
DGND
DGND
COUT
MCLK
CCLK
52 51 50 49 48 47 46 45 44 43 42 41 40
DVDD 1 39 DVDD
CLATCH 2 38 DBCLK
CIN 3 37 DLRCLK
PD/RST 4 36 M/S
AGND 5 35 AGND
NC 6 34 OUTR4
OUTL1 7 TOP VIEW 33 NC
NC 8 32 OUTL4
OUTR1 9 31 NC
AGND 10 30 AGND
AVDD 11 29 AVDD
NC 12 28 OUTR3
OUTL2 13 27 NC
14 15 16 17 18 19 20 21 22 23 24 25 26
NC
OUTR2
AGND
FILTD
FILTR
AVDD
ADCLN
ADCLP
ADCRN
ADCRP
AGND
NC
OUTL3
DVDD DVDD ODVDD ALRCLK ABCLK ASDATA CCLK CLATCH CIN COUT MCLK PD/RST M/S AVDD AVDD
DLRCLK CONTROL PORT CLOCK
DBCLK
VOLUME OUTL1
DSDATA1 SERIAL DATA DIGITAL -
DSDATA2 I/O PORT FILTER DAC
VOLUME OUTR1
DSDATA3
VOLUME OUTL2
DSDATA4 DIGITAL -
FILTER DAC
VOLUME OUTR2
VOLUME OUTL3
ADCLP - DIGITAL DIGITAL -
ADC FILTER FILTER DAC
ADCLN VOLUME OUTR3
VOLUME OUTL4
DIGITAL -
ADCRP - DIGITAL FILTER DAC
VOLUME OUTR4
ADCRN ADC FILTER
FILTD
VREF FILTR
AD1837
DGND DGND AGND AGND AGND AGND
AD1837 Terminal Function
Pin No. Pin Name Input/ Description
Output
1,39 DVDD Digital Power Supply. Connect to digital 5V supply.
2 CLATCH I Latch Input for Control Data
33 CIN I Serial Control Input
4 PD/RST I Power-Down/Reset
5,10,16,24,30,35 AGND Analog Ground
6,12,25,31 NC Not connected
7,13,26,32 OUTLx O DACx Left Channel Output
8,14,27,33 NC Not connected
9,15,28,34 OUTRx O DACx Right Channel Output
11,19,29 AVDD Analog Power Supply. Connect to analog 5V supply.
17 FILTD Filter Capacitor Connection. Recommend 10µF/100nF.
18 FILTR Reference Filter Capacitor Connection. Recommended 10µF/100nF.
20 ADCLN I ADC Left Channel Negative Input
21 ADCLP I ADC Left Channel Positive Input
22 ADCRN I ADC Right Channel Negative Input
23 ADCRP I ADC Right Channel Positive Input
36 M/S I ADC Master/Slave Select
37 DLRCLK I/O DAC LR Clock
38 DBCLK I/O DAC Bit Clock
40,52 DGND Digital Ground
41-44 DSDATAx I DACx Input Data (Left and Right Supply)
45 ABCLK I/O ADC Bit Clock
46 ALRCLK I/O ADC LR Clock
47 MCLK I Master Clock Input
48 ADVDD Digital Output Driver Power Supply
49 ASDATA O ADC Serial Data Output
50 COUT O Output for Control Data
51 CCLK I Control Clock Input for Control Data
18
AVR-1906 / AVR-786 / AV