Kenwood DPXMP 2090 Service Manual

Page 3

DPX301
DPX-MP2090/MP20908

COMPONENTS DESCRIPTION

0 SWITCH UNIT (X16-3530-xx)

Ref. No. Application / Function Operation / Condition / Compatibility

IC1 Remote Control IC

Q1 ~3 GRlDiDRIVER Each Transisters base is L" then GRID is On

06,7 SW5V The power supply of |C1 is turned on when 06s base level goes L"

09 RED SW RED LED is turned on when 09s base level goes H"

Q12 VFD RESTART Key scan start at 0125 Base goes H" when the SETs Power is On
Q ELECTRIC UNIT (X34-4140-xx)

Ref. No. Application / Function Operation / Condition / Compatibility

IC1 System p-COM Controls FM/AM tuner, the changer, CD mechanism, Panel, volume and tone

ICZ E. Vol Controls the source, volume, tone

l03 A8V Ref Power Supply Output 1.27V

IC4 Power IC Amplilies the front L/R and the rear L/R to 50W maximum.

|C5 ILL+B Power Supply Output 1.225V

ICB Muting logic IC Controls logic for muting

|C7 Reset IC L" when detection voltage goes below 3.6V or less

IC12 SW Regulator Power Supply for mp3 and VFD

Q1,2 B.U.5V AVR While BU is applied, BU5V AVR outputs +5V

Q3,11 SW5V When Q11base goes Hi, SW5V outputs +5V

Q4,9 SW14V When QQbase goes Hi, SW14V outputs 14V

05,6,10 AUDIOBV AVR When Q10base goes Hi, A8V AVR outputs 8.0V

Q7,8 SERVO+B AVR When QB'base goes Hi, S+B AVR outputs 7.5V

Q12 SW for IC12 When QtZbase gose Lo, |C7 is turned on

Q13 PANEL 5V When QtBbase gose Lo, PANEL5V outputs 5V

Q101,102 P-ANT SW When Q102base goes Hi, P-ANT SW outputs 14V

0103,106 P-CON SW When Q106base goes Hi, AVR outputs 14V

Q104,105 P-CON Protection Protect 0103 by turning on when P-CON output is grounded

Q107 EXT-AMP-CON When Q107base goes Lo, 0107 is turned on

Q108 Small lamp det SW When QtOSbase goes Hi, 0108 is turned on

Q109 SERGE Det. When Q109base goes Hi, IC4 is changed into a standby state

0111 BU det When Q111base gose Hi, 0111 is turned on

0112 ACC det When Qt12base gose Hi, 0112 is turned on

Q113 Mute-Driver When a base gose Hi, Pre-out mute driver is turned on

Q114 Mute-Driver Q1 14 turned on by RST

0115,116 Pre-out mute driver When a base gose Lo, mute driver is turned on

0298,2539 Tuner8V SW When 0299base goes Hi, Tuner8V output 8V

Q300,301 AM+B When Q301base goes Hi, AM+B is out

Q302,303 Tuner8V When 0303base goes Hi, Tuner8V outputs 8V

0305,1306 SW ILL+B When QaOGbase goes Hi, SW |LL+B outputs 11V

Q400~403 Pre-out mute SW When a base goes Hi, Pre-out is muted

Page 10

DPX301

DPX-MP2090/MP20908
MICROCOMPUTERS TERMINAL DESCRIPTION

10

0 CD MECHANISM MICROCOMPUTER: 70303OBYGCJ21A (X32: IC4)

Processing Operation
Pin No. Pin Name l/O Application Description Remarks
1 NC - Not used Low-fixed
2 E2P SCL l/O Rom correction E2P I2C clock
3~5 NC - Not used Low-fixed
6 VDD - 5V electric potential
7 GND - GND electric potential
8,9 NC - Not used Low-fixed
10,11 PON1,PON2 0 Power ON/OFF control H : ON, L : OFF
12 LOE/LIM SW | Down-limit SW detection L : Lim detection
Used with DXM-6680W (X32686).
13 DAC MUTE O DAC MUTE control H : MUTE ON, L : MUTE OFF With DXM-6580W (X32674), open
and L-fixed.
Used with DXM-6680W (X32686).
14 DAC RST O DAC RESET H :NORMAL, L: RESET With DXM-6580W (X32674), open
and L-fixed.
Used with DXM-6680W (X32686).
15 EMPH 0 External DAC Emphasis control H : Emphasis ON With DXM-6580W (X32674), open
L : Emphasis OFF and L-fixed.
16,17 NC - Not used Low-lixed
L : Normal operation
18 lCNpp - Write voltage (FLASH) H : In writing
19 MUTE L O Lch audio MUTE control L : MUTE ON, H : MUTE OFF
20 MUTE R 0 Ron audio MUTE control L : MUTE ON, H : MUTE OFF
21 TYPE I DAC switching H :DSP built-in DAC used H : DXM-8580W (X32674)
L : DSP built-in DAC Not used L : DXM-6680W (X32686)
22 TEST 01 0 TEST MODE 01 (Not used)
23 TEST 0 2 0 TEST MODE 0 2 (Not used)
24 TEST 0 3 0 TEST MODE 0 3 (Not used)
25 TEST 0 4 0 TEST MODE 0 4 (Not used)
26 NC - Not used Low-fixed
27 WAIT I Wait control signal detection
28~30 NC - Not used Low-tixed
31 RESET | Reset detection H : NORMAL, L : RESET
32 XT1 I Not used
33 XT2 - Not used
34 REGC -
35 X2 -
36 X1 |
37 Vss - GND electric potential
38 VDD - 5V electric potential
39 NC - NC Output stopped in standby 3.3V driven
40 WRL | Multiplex WRITE signal 3.3V driven

Page 30

DPX301

DPX-MP2090/MP20908

ANODE CONNECTION
. . NIjAIME 313 2G 1G
I n I Fl 9a 7 2a
. 1 I: l . . P2 9n 7 2n
3D) , :I \ EIl:Il:Il:I. 52 PS 9i 7 21
P4 9k 7 2k
P5 95 7 25
P6 91 7 2r
P7 9m 7 2m
P6 99 7 2g
_ _ _ _ _ _ _ _ P3 95 7 2c
-I Pro Se 7 2e
P11 9r 7 2r
I sz 95 7 2;;
P13 9n 7 2n
I PM 9d 7 2d
P15 Ba 6a 45
:I n I We 76 55 3a
1 :| E: I P17 an an 4n
in E DES D PIS 7n 5h 3n
:IEI l:||:||:I n I PIS gI :I :I
jEIEl DEI|:||:I P20 I I I
3:: l:n:n:n:| n I P21 8k 6k 4k
3:: u EIEI|:I|:I P22 7k 5k 3k
:IEIIZI I:| I:II:||:I|:I El I P23 Eb 6b 4b
jun l:l uncut: P24 75 55 35
:ID Ell:ll:l Ell:||:l El I p25 SI SI 41
3'5:33' E: P26 71 51 31
HUGE: E: D I P27 6m 5m 4m
I P28 7m 5m 3m
P29 89 6g 49
I P30 79 59 39
P31 55 65 4c
I P32 7c 5C 3c
P33 9e 6e 45
I P34 75: Se 3e
P35 8r Sr 4r
I P36 7r 5r 3r
P37 6;; 6p 4p
I P38 7p 55 35
I P39 En 6n 4n
P40 7n 5n 3n
I P41 Ed 6d 4d
P42 7d 5d Ed
I P43 7 call cul2
P44 7 7 6013
I P45 7 0;:
I P46 IF©L®ER RUST
I P47 ALIMU AWST
I P45 7
I P49 7
I P50 7
I P51 7
I P52 7 7
P53 7 7
I P54 7 7
I P55 7 7
P56 7 7
I P57 7 7
P58 7 7
I P59 7 7
I P60 7 7
7.
E I P61 7 7
I P62 7 7
I P63 7 7
P64 7 7
I P65 7 7
P66 7 7
I P67 7 7
0" P68 7 7
I P69 7 7
5 P70 7 7
7 I P71 7 7 s10

DPX301
DPx-MP2090/MP20905 (2/2)

30 X16-3530-xx (2/2)

1
DTA114EUA
DTA124EUA
DTC124EUA
DTC144EUA
OUT
IN
GND 2
DAP202U
DA204U
11%
3
3
M5237ML-CFOJ
1
3 2
NJM4580V-ZB
4
5
CAUTION : For continued safety, replace safety critical
components only with manufacturers recommended parts
(refer to parts list).
A Indicates safety critical components. To reduce the
risk of electric shock, leakage-current or resistance mea-
surements shall be carried out (exposed parts are ac-
ceptably insulated from the supply circuit) before the
appliance is returned to the customer.
- DC voltages are as measured with a high impedance
voltmeter. Values may vary slightly due to variations
between individual instruments or/and units.
7