Kenwood RXD-303, Руководство по обслуживанию

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RXD-303/353/503/553/653/A33/A53
8
CIRCUIT DESCRIPTION
Input Voltage KEY3 KEY2 KEY1
(V) Pin94 Pin95 Pin97
0.00 0.23 REV. MODE POWER
0.26 0.75 REC EX. BASS DISPLAY/DEMO
0.79 1.29 TAPE EQ. CD PLAY/ PAUSE TUNING MODE
1.33 1.84 OPEN/CLOSE BAND MENU
1.88 2.38 DISC SKIP TAPE B SOUND
2.42 2.93 DISC 3 TAPE A SELECT
2.96 3.45 DISC 2 AUX BACK
3.49 3.98 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
4-2 Key Matrix
Pin No. Pin Name I/O Description
ACTIVE
H L
1 SLEVEL I RSD signal level input.
2 CE2 I Backup detection input 2. AC ON AC OFF
3 SD I SD detection input.
4 ST I Stereo detection input.
5 PLL CE O PLL IC chip enable.
6 RDS DATA I RDS data input.
7 PLL CLK O PLL IC clock output.
8 BYTE - GND.
9 CNVSS - GND.
10 XCIN I Timer clock input(32.768kHz).
11 XCOUT O Timer clock output(32.768kHz).
12 RST I Reset signal input. NORMAL RESET
13 X OUT O Main clock output(10MHz).
14 VSS - GND.
15 X IN I Main clock input(10MHz).
16 VCC(BU) - u-com power 5.0V).
17 NMI - Connected to VCC.
18 REM I Signal input of remote control.
19 RDS CLK I RDS clock input.
20 BLKCK I Sub code synchronous signal input. L H Interrupt
21 CE2 I Back up detection input. AC ON AC OFF
22 BEEP SOUND O Beep sound output.
23 PLL DO I PLL IC data input.
24 B EQ O 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/CrO2 changeover control. NORMAL CrO2
28 MCLK O CD DSP command clock signal output.
29 STAT I CD DSP status signal input.
30 MDATA O CD DSP command data output.
31 FL DATA O Data output to VFD dot driver.
32 A CrO2 I A deck CrO2 detection switch input. NORMAL CrO2
33 FL CLK O Clock output to VFD dot driver.
34 FL CE O Chip enable output toVFD dot driver.
35 FL RST O Reset signal output to VFD dot driver.
36 F REC I B deck forward recording prohibition detection switch.
37 B CrO2 I B deck CrO2 detection switch input. CrO2 Normal
38 A PACK I A deck cassette tape detection switch input.
39 A PLAY I A deck head position detection switch input.
40 B PACK I B deck cassette tape detection switch input.
4-3 Pin Description of Microprocessor