Kenwood KRC-535, Service Manual

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KRC-535/865
5
MICROCOMPUTER'S TERMINAL DESCRIPTION
Pin Name I/O Purpose Operation Description
47 SUB2 O Sub-motor output terminal (2).
48 SUB3 O Sub-motor output terminal (3).
49 CAS/SRM O
Cassette mechanism/SRM mechanism Cassette mechanism: H.
voltage switching terminal. SRM mechanism: L.
50 N.C O Outputs Low. No connection.
51 N.C O Outputs Low. No connection.
52 ILL-ON O FL +B output terminal. ON: H, OFF: L
53 PAN-5V O Panel 5 V control terminal. Panel detected: H Panel not detected: L
54 N.C O Outputs Low. No connection.
55 BVdd - Positive power supply terminal.
56 BVss - Grounding terminal.
57 TYPE1 I Destination type switching port.
58 TYPE0 I Destination type switching port.
59 N.C O Outputs Low. No connection.
60 N.C O Outputs Low. No connection.
61 ST TYPE1 I IC2 destination type terminal. Default: L.
62 ST TYPE0 I IC2 destination type terminal. Default: L.
63 SRM-SW1 I Panel position detection switch 1.
64 D/A-SDA O D/A clock line. (V-LED)
Panel detached: L.
Momentary power down: L.
65 L CE I/O CE terminal for LCD driver.
66 SRM-SW3 I Panel position detection switch 3.
67 SRM-SW2 I Panel position detection switch 2.
68 FWD/REV O TAPE EQ input switching terminal. FWD: L. REW: H.
During TAPE PLAY: H.
69 MS-CONT I/O
Constant switching terminal in case of blank During TAPE FF/REW or other than TAPE input: L.
detection. Cassette mechanism detected: L.
Cassette mechanism not detected: H.
70 AVCONT O AD reference voltage control output. Same timing as P-ON. H during operation.
71 Avdd - Positive power supply terminal.
72 Avss - Grounding terminal.
73 Avref I Reference voltage supply terminal for A/D converter.
74 PHONE I PHONE detection terminal.
TEL MUTE: No more than 1 V.
NAVI MUTE:2.5 V or more.
75 R-REEL I Cassette mechanism reel pulse input (REV). Vth = 2.5 V.
76 F-REEL I Cassette mechanism reel pulse input (FWD). Vth = 2.5 V.
77 N.C I No connection. Connected to GND.
78 SRM-DET I SRM mechanism detection. SRM mechanism detected: L.
79 NOISE I FM noise detection terminal. Model without RDS: Connected to GND.
80 S-METER I Signal meter detection terminal.
81 R-DATA I RDS decoder DATA input terminal.
Model without RDS and
RBDS: Connected to GND.
82 R-QUAL I RDS decoder QUAL input terminal.
Model without RDS and
RBDS: Connected to GND.
83 IFC-OUT I F/E IFC OUT input terminal. Station detected: L.
84 MUSIC I Music blank detection input.
Music signal detected: L.
Music signal not detected: H.
85 PACK-DET I Cassette mechanism pack detection terminal. Cassette pack detected: L.
Cassette pack not detected: H.
86 DOLBY O Dolby ON/OFF switching. ON: H. OFF: L.
87 R-CLK I RDS decoder CLK input terminal. Model without RDS and
RBDS: Connected to GND.
88 CH-REQC I Request input from CH. ON: L.
89 KEY REQ I Communication request from LCD driver.
90 N.C I No connection. Connected to GND.
91 EQ-MUTE O EQ muting switching.
During TAPE PLAY: L. During TAPE FF/REW: H.
Other than TAPE input: H.
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