Kenwood DMF-3020, Service Manual

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DMF-3020/3020
(
S
)
/5020/MD-203
7
CIRCUIT DESCRIPTION
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
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
(PCM3003E:DMF-5020)
V L
IN
V R
IN
V L
OUT
V R
DAC
ADC
OUT
V 1
REF
V 2
REF
V
COM
AGND2
( ) PCM-3003
AGND1 DGND1 Vcc2 Vcc1 Vcc SYSCK
ZERO
(PCM 3002ONLY)
(PDDA)
(20BIT)
ML
MD(DEM1)
MC(DEM0)
DOUT
DIN
BCKIN
LRCIN
RST(PDAD)
Analog
front-end
Analog
front-end
∆∑
Modulator
∆∑
Modulator
(+)
(-)
(+)
(-)
Analog
L.P.F.
Analog
L.P.F.
MPX level
∆∑
modulator
MPX level
∆∑
modulator
Zero
detect
Decimation
H.P.F.
Decimation
H.P.F.
Serial I/O
Model/format
control I/O
Reset
power down
Zero
detect
CLOCK Power supply
8fs O.S.F.
(Inter pol.)
Vref
2-2 Block diagram
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.
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 "
Display [ KEY 028 ] into the KEY-TEST mode.
Push a key, then display [ KEY
] .
(2) [ ERROR RATE ] mode
• Function of the key
• Function of the key
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.
TIMER SW Mode
(1) REC INSPECTION
(2) PLAY ERROR RATE
OFF NONE
Key Mode
REC/INPUT KEY-TEST
EDIT NIAGARA TEST
TITLE INPUT None all lighting
Key Function
PLAY CPLAY (MID)
REC CREC (MID)
STOP
STOP CPLAY, CREC
(2time push) ERROR RATE
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
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
Vdd=5.0V
5.0V : KEY OFF
1-3 Initialization
POWER = ON (DM-9090,DM-5090)
REC INPUT = ANALOG
AUTO CUT = OFF
AUTO/MANUAL = AUTO
OUTPUT LEVEL = 0 dB
PLAY MODE = TRACK
REPEAT = OFF
TIME DISPLAY = )
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
1-5 Key voltage matrix
Model INISW INISW
DMF-3020
3.5 (V)
MD-203 LOW
DMF-5020 1.5 (V)
1-4 Switch control table
No. Name I/O Description
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 H; 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 H; ON
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 H; ON
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
2. AD/DA converter :
PCM3002E, PCM3003E (X25: IC8)
2-1 PIN DESCRIPTION
(PCM3002E: DMF-3020,MD-203)
DMF-5020(K)
COVER1,1P(
98.12.9
16:39
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14