Kenwood RXD 303 E Service Manual

Page 1

RXD7303(K) COVER1,1P( 4/21/00 5:42 PM \°-/ 1

MINI HiFi COMPONENT SYSTEM

RXD- 303/303E/353/353E/503/503E/553/ 553E/

553-GR/553E-GR/653/653E/A33/A53/A53-GR

SERVICE MANUAL
(XD-303~A73)**

© 2000-3/851-5605-00 (K/K) 3633

KENWOOD

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"Refer to page 2 it you want to know system configuration.

* Refer to parts list on page 33.

product safety.

in compliance with Federal Regulations, following are repro-
ductions of labels on, or inside the product relating to laser

KENWOOD-Crop. certifies this equipment conforms to DHHS
Regulations No. 21 DFR 1040. 10, Chapter 1, Subchapter J.

DANGER : Laser radiation when open and inlerlock defeated.
AVOID DIRECT EXPOSURE TO BEAM

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RXD7303(K) COVER1,1P( 4/21/00 5:42 PM \°-/ 8

RXD-303/353/503/553/653/A33/A53

CIRCUIT DESCRIPTION

/\
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4-2 Key Matrix

Input Voltage KEY3 KEY2 KEY1
(V) Pin94 Pin95 Pin97
0.00~0.23 REV. MODE POWER
0.26N0.75 REC EX. BASS DISPLAY/DEMO
0.79~1.29 TAPE EQ. CD PLAY/ PAUSE TUNING MODE
1.33~1.84 OPEN/CLOSE BAND MENU
1.88N2.38 DISC SKIP TAPE B SOUND
2.42~2.93 DISC 3 TAPE A SELECT
2.96~3.45 DISC 2 AUX BACK
3.49N3.98 DISC 1 STOP ENTER
4.01 ~4.52 - - -
4.54~4.80 KEY OFF KEY OFF KEY OFF
' The input voltage value : for 4.8[V] in a standard voltage
4-3 Pin Description of Microprocessor
Pin No. Pin Name l/O Description H ACT'VE L
1 SLEVEL | RSD signal level input.
2 CE2 | Backup detection input 2. AC ON AC OFF
3 SD | SD detection input.
4 ST | Stereo detection input.
5 PLL CE 0 PLL IC chip enable.
6 RDS DATA | RDS data input.
7 PLL CLK O PLL IC clock output.
/\ 8 BYTE - GND.
\ / 9 CNVSS - GND.
10 XCIN | Timer clock input(32.768kHz).
11 XCOUT O Timer clock output(32.768kHZ).
12 RST | Reset signal input. NORMAL RESET
13 X OUT 0 Main clock output(10MHz).
14 VSS - GND.
15 X IN | Main clock input(10MHz).
16 VCC(BU) - u-com power supply(+5.0V).
17 NMI - Connected to V00.
18 REM | Signal input of remote control.
19 RDS CLK | RDS clock input.
20 BLKCK | Sub code synchronous signal input. L->H Interrupt
21 CE2 | Back up detection input. AC ON AC OFF
22 BEEP SOUND O Beep sound output.
23 PLL DO | PLL IC data input.
24 B E0 0 Equalizer control of B deck play back.
25 REC MUTE O Deck recording mute control. MUTE ON
26 R/P O Deck recording/playback changeover control. RECORDING PLAY
27 NOR O B deck Normal/Cr02 changeover control. NORMAL Cr02
28 MCLK 0 CD DSP command clock signal output.
29 STAT | CD DSP status signal input.
30 MDATA 0 CD DSP command data output.
31 FL DATA 0 Data output to VFD dot driver.
32 A Cr02 | A deck Cr02 detection switch input. NORMAL Cr02
33 FL CLK O Clock output to VFD dot driver.
34 FL CE 0 Chip enable output toVFD dot driver.
35 FL RST 0 Reset signal output to VFD dot driver.
36 F REC | B deck forward recording prohibition detection switch.
37 B Cr02 | B deck Cr02 detection switch input. Cr02 Normal
38 A PACK | A deck cassette tape detection switch input.
39 A PLAY | A deck head position detection switch input.
40 B PACK | B deck cassette tape detection switch input.