Kenwood RXD-M55-H, Service Manual

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RXD-M55-H/M55-N/M55-S/M55E-H/M55E-N/M55E-S
9
CIRCUIT DESCRIPTION
Pin No. Pin Name I/O Pin Description
Active
H L
1 VREF- - Power supply (-) for A/D converter.
2 PH I Deck reel sensor input.
3 TN TYPE I Discrimination of tuner destination.
4 S LEVEL I RDS signal level input. (E/T version only)
5,6 KEY1,KEY2 I A/D key (1, 2) input.
7 A LEVEL I Unused.
8 TH I Unused.
9 CD PROTECT I Detection pin of CD protection.
10 VREF+ - A/D reference voltage input of the A/D converter.
11 VDD I Pin for power supply (+5V).
12 OSC2 O Main clock output (8.388MHz).
13 OSC1 I Main clock input (8.388MHz).
14 VSS - Connected to be ground.
15 XI I Timer clock input (32.768kHz).
16 XO O Timer clock output (32.768kHz).
17 MMOD - Connected to be ground.
18 SDI O Data output to FL driver.
19 SDO I Data input from FL driver.
20 SCLK O Clock output to FL driver.
21 MLD O CD DSP command load signal output. Load
22 SUBQ I CD sub code input.
23 SQCK O CD sub code clock output.
24 CL SW I Input pin of close switch for CD tray. Closed
25 RESET I Reset signal input for microcomputer. Reset
26 CE I Back up detection input. AC On AC Off
27 OP SW I Input pin of open switch for CD tray. Opened
28 CD POWER O ON/OFF control pin for CD DSP power. ON OFF
29 XRST O CD DSP reset output. Reset
30 SLT SW I CD start limit switch input. "L" : Start Limit Position
31 REM CONTROL I Remote control signal input.
32 NO USE - Unused.
33 RDSCLK I RDS clock input. (E/T version only)
34 CE2 I Detection pin of voltage drop.
35 CD BLKCK I Sub code block clock input.
36 MDATA O CD DSP command data output.
37 STAT I CD DSP status signal input.
38 MCLK O CD DSP command clock signal output.
39 CLOSE O Control pin of CD tray motor.
40 OPEN O Control pin of CD tray motor.
41 HP I I Detection pin for headphones jack. Detected
42 FLASH UC 1 I Power supply for flash ROM.
43 FLASH UC 2 I Power supply for flash ROM.
44 EVOL CE O Chip enable output of electronic volume (X29, IC601).
45 EVOL.CLK O Clock output of electronic volume (X29, IC601).
46 EVOL.DATA O Data output of electronic volume (X29, IC601).
47 POWER RLY O Power relay control. ON
48,49 N.C. - Unused.
50 FLASH WRITE I Unused.
51 N.C. - Unused.
52 PLL CLK O PLL IC clock output.
53 PLL DO/ST I PLL IC data input.
54 PLL DAT O PLL IC data output.
55 PLL CE O PLL IC chip enable output.
5-2 Port Description of Microcomputer