Kenwood KRC-X838, Service Manual

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KRC-Z965,X838
7
Pin No. Pin Name I/O Description Processing Operation
30 MUTE I/O MUTE output Lo: Muting OFF, Hi-Z: Muting ON
31 O CE I/O External display CE terminal
32 O CLK I/O External display clock terminal
33 O DATA I/O External display data terminal
34
RESET
I Reset input Lo: System reset , Hi: Normal operation
35 XT1 I Sub clock resonator connection terminal Clock count during POWER OFF mode
36 XT2 - Sub clock resonator connection terminal
37 REGC -
Capacitor connection terminal for regulator inside
microprocessor
38 X2 - Main clock resonator connection terminal
Oscillation: POWER ON mode, Oscillation stop: POWER
OFF mode or momentary power down detected
39 X1 I Main clock resonator connection terminal
40 VSS - Ground connection terminal Connected to GND lines.
41 VDD - Positive power supply connection terminal Connected to BU 5V lines.
42 CLKOUT O Internal system clock output Not used(N.C.)
43 SUB O Sub motor control output
44 SUB+ O Sub motor control output
45
PRE MUTE
O Pre-out muting control output
Lo: Momentary power down detected, Hi: Fix in
the case of 2 zone mode
46 NC O Not used(N.C.)
47 MOTOR I/O Cassette mechanism main motor control output Hi-Z: Motor stopped, Hi: Motor running
48
MTL
O Normal/METAL switching control output Lo: METAL, Hi: Normal
49 EQ MUTE O EQ muting switching output
Lo: Tape play mode, Hi: Tape FF/REW, Hi: Except
Tape mode
50 AFS O Noise detection time constant switching terminal
Lo: During FM seek or AF search, Hi: During FM
reception, Hi: Last FM with RDS model
51 AM+B I/O AM+B control output Hi: During AM reception
52 FM+B I/O FM+B control output Hi: During FM reception, Hi: Last FM reception
53 R QUAL I Quality input from the RDS decoder IC Except RDS model: Not used(Pull down to GND lines)
54 R DATA I Data input from RDS decoder IC Except RDS model: Not used(Pull down to GND lines)
55 IC2TYPE0 I IC2 setting terminal 0 Lo: Initial value(Default)
56 IC2TYPE1 I IC2 setting terminal 1 Lo: Initial value(Default)
57 P ON I/O SW14V control output Hi-Z: POWER OFF mode, Hi: POWER ON mode
58 BVDD - Positive power supply connection terminal Connected to BU 5V lines.
59 BVSS - Ground connection terminal Connected to GND lines.
60 TYPE I Destination type setting terminal Lo: E type, Hi: M type
61 E2PDET I EEPROM detection input Lo: No EEPROM, Hi: With EEPROM
62,63 NC O Not used(N.C.)
64 AUX SW O TAPE/AUX input switching output Lo: Except AUX input, Hi: AUX input
65 ILL ON I/O FL/Illumination AVR ON/OFF control output Hi-Z: AVR OFF, Hi: AVR ON
66 F/R O TAPE EQ input switching output Lo: Tape FWD input, Hi: Tape REV input
67 MSC O Music blank detection constant switching output
Lo: Tape FF/REW mode, Hi: Tape PLAY mode,
Lo: Except Tape mode
68 MODE1 I Cassette mechanism mode detection input 1
69 MODE2 I Cassette mechanism mode detection input 2
70 CH CON O Changer control output Lo: Standby mode, Hi: Operation mode
71 CH RST O Reset output to changers : Reset
72
CH REQH
O Communication request output to changers Lo: Request
73 AVCONT O A/D converter reference voltage control output Hi: Active, Connected to AVREF terminal
74 AVDD - A/D converter positive power supply connection terminal Connected to BU 5V lines.
75 AVSS - A/D converter ground connection terminal Connected to GND lines.
76 AVREF I A/D converter reference voltage input terminal
77 IFC OUT I Input terminal from F/E IFC OUT Hi: Station detected (Vth=2.5V)
78 S METER I S-meter input from F/E
79 NOISE I FM noise detection input
80 F REEL I FWD reel pulse input from the cassette mechanism Hi: Reel pulse detected (Vth 2.5V)
81 R REEL I REV reel pulse input from the cassette mechanism Hi: Reel pulse detected (Vth 2.5V)
82-85 NC I Not used(Pull down to GND lines)
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