2-2 Block Diagram - Kenwood DMF-3020 Service Manual

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No. Name I/O
66 SWDT O Data for writing to CXD2652AR (IC2)
67 SCLK O Serial clock to CXD2652AR (IC2)
68,69 - - N.C.
70 ENCB I Communication to sub u-COM (IC28) Rotary encoder B
71 DRON O DSP (D.R.I.V.E ¿ : IC40) drive on
72 FLDCE O Latch to FL driver
73 - I N.C.
74 DWDT O Data to LC75710NE (IC1)
75 DCLK O Clock to LC75710NE (IC1)
76 STB LED O Latch to LC8904Q (IC23) Standby LED ON/OFF
77 ML O DAC (IC41) control latch
78 MD O DAC (IC41) control data
79 MC O DAC (IC41) control clock
80 - O No used / pull up
81 BACKCHK O Back up voltage check
82 REC LED O Clock to SM5844AF (IC25) REC LED ON/OFF
83 ADRST O Data to SM5844AF (IC25) ADC reset
84~91 AD0~AD7 O SRAM address / data (AD0~AD7)
92~99 A8~A15 O SRAM address (A8~A15)
100 Vss - GND
1-3 Initialization
POWER = ON (DM-9090,DM-5090)
REC INPUT = ANALOG
OUTPUT LEVEL = 0 dB
AUTO/MANUAL = AUTO
AUTO CUT = OFF
PLAY MODE = TRACK
REPEAT = OFF
TIME DISPLAY = SINGLE(+)
LEVEL METER MODE = NORMAL MODE
AUTO TNO TIME = 2 sec
AUTO TNO LEVEL = 0 (-55 dB)
REC END WRITE = ON
DRIVE = ON
PRESET TITLE = PRE1 : Pops
PRE2 : Rock
PRE3 : Classic
PRE4 : Jazz
PRE5 : Disco
PRE6 : Best Hits
PRE7 : Air Check
PRE8 : No.
PRE9 : Vol.
: Backup item
1-4 Switch control table
Model INISW INISW
DMF-3020
3.5 (V)
MD-203 LOW
DMF-5020 1.5 (V)
Description
H; ON
H; ON
H; ON
1-5 Key voltage matrix
Vdd=5.0V
0.0 V 0.8 V 1.6 V 2.4 V 3.2 V 4.0 V
KR0 – TT INPUT REC – MONITOR/ –
INPUT DEL
KR1 EJECT STOP FB REC SET –
MODE
KR2 PLAY FF EDIT/ – ENTER/ –
SPACE TIME
KR3 PAUSE REC LEVEL LEVEL – –
UP DOWN
5.0V : KEY OFF
2. AD/DA converter :
PCM3002E, PCM3003E (X25: IC8)
2-1 PIN DESCRIPTION
(PCM3002E: DMF-3020,MD-203)
PIN PIN NAME I/O DESCRIPTION
1,2 VCC1 - ADC ANALOG POWER SUPPLY
3 VINR I RCH ANALOG INPUT
4,5 VREF1,2 - REFERENCE VOLTAGE 1,2
6 VINL I LCH ANALOG INPUT
7 RST I RESET L: ON
8 ML I CONTROL DATA INPUT LOAD STOROBE
9 SYSCK I SYSTEM CLOCK INPUT256fs 384fs 512fs
10 LRCIN I SAMPLING CLOCK INPUT
11 BCKIN I BIT CLOCK INPUT
12 DOUT O DIGITAL AUDIO DATA OUTPUT
13 DGND - DIGITAL GND
14 VDD - DIGITAL POWER SUPPLY
15 DIN I DIGITAL AUDIO DATA INPUT
16 ZERO I ZERO FLAG OUTPUT L: ON
17 MD I CONTROL DATA INPUT
19 VOUTL O LCH ANALOG OUTPUT
20 VOUTR O RCH ANALOG OUTPUT
21 VCOM - ANALOG AMP COMMON
22 AGND2 - DAC ANALOG GND
23 AGND1 - ADC ANALOG GND
24 VCC2 - DAC ANALOG GND
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(PCM3003E:DMF-5020)
PIN PIN NAME I/O DESCRIPTION
1,2 VCC1 - ADC ANALOG POWER SUPPLY
3 VINR I RCH ANALOG INPUT
4,5 VREF1,2 - REFERENCE VOLTAGE 1,2
6 VINL I LCH ANALOG INPUT
7 PDAD I ADC POWER DOWN L: ON
8 PDDA I DAC POWER DOWN L: ON
9 SYSCK I SYSTEM CLOCK INPUT256fs 384fs 512fs
10 LRCIN I SAMPLING CLOCK INPUT
11 BCKIN I BIT CLOCK INPUT
12 DOUT O DIGITAL AUDIO DATA OUTPUT
13 DGND - DIGITAL GND

2-2 Block diagram

(+)
∆∑
Decimation
Analog
V L
IN
front-end Modulator H.P.F.
(-)
V 1
REF
Vref
V ADC
COM
V 2
REF
(+)
∆∑
Analog Decimation
V R
IN front-end
Modulator H.P.F.
(-)
MPX level
Analog 8fs O.S.F.
∆∑
V L
OUT
L.P.F. (Inter pol.)
modulator
DAC
MPX level
Zero
Analog ∆∑
V R
OUT L.P.F. detect
modulator
Power supply CLOCK
Vcc2 Vcc1 Vcc
AGND2 AGND1 DGND1
( ) PCM-3003
3. Test mode of the unit
3-1 Setting of the test mode
While pressing the [REC/INPUT] key, plug the AC power
cord into the AC wall outlet.
3-2 Contents of the test mode
Choose the 3 mode by TIMER switch position below.
TIMER SW Mode
(1) REC INSPECTION
(2) PLAY ERROR RATE
OFF NONE
NONE means none mode.
(1) [ INSPECTION ] mode
• ENGLISH display (2secs)
• " NIAGARA TEST " display
Dot : Niagara
Segment : All lighting
• Push a key, then cancel " NIAGARA TEST "
PIN PIN NAME I/O DESCRIPTION
14 VDD - DIGITAL POWER SUPPLY
15 DIN I DIGITAL AUDIO DATA INPUT
16 20BIT I 20/16 BIT DATA FORMAT CHOICE
17,18 DEM1,0 I DE-EMPHASIS CONTROL 1,0
19 VOUTL O LCH ANALOG OUTPUT
20 VOUTR O RCH ANALOG OUTPUT
21 VCOM - ANALOG AMP COMMON
22 AGND2 - DAC ANALOG GND
23 AGND1 - ADC ANALOG GND
24 VCC2 - DAC ANALOG GND
LRCIN
BCKIN
Serial I/O
DIN
DOUT
MC(DEM0)
Model/format
MD(DEM1)
control I/O
ML
(20BIT)
RST(PDAD)
Reset
power down
(PDDA)
Zero
detect
SYSCK
ZERO
(PCM 3002ONLY)
• Function of the key
Key Mode
REC/INPUT KEY-TEST
EDIT NIAGARA TEST
TITLE INPUT None all lighting
Display [ KEY 028 ] into the KEY-TEST mode.
Push a key, then display [ KEY ] .
(2) [ ERROR RATE ] mode
• Function of the key
Key Function
PLAY CPLAY (MID)
REC CREC (MID)
STOP CPLAY, CREC
STOP
(2time push) ERROR RATE
4. Microprocessor reset
The microprocessor can be initialized while pressing the
[EJECT] key, plug the AC power cord into the AC wall
outlet.
5. Mechanism test mode
Refer to 1050MD/DM-5090/MD-9090 service manual (B51-
5387-00), if you see this test mode.
9/8/2013