Description Of Major Ics - JVC KS-FX725R Service Manual

KS-FX725R
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Description of major ICs

UPD178018AGC584(IC701) : System controller micon
1.Terminal Layout
24 – 1
25
40
41 – 64
2.Description
Pin
Symbol I/O
No.
1 KEY0 I
2 KEY1 I
3 KEY2 I
4 LEVEL I
5 SM I
6 SQ I
7 LCDCE O Chip enable output to LCD driver
8 LCDDA O Data output to LCD driver
9 LCDSCK O Clock output to LCD driver
10 BUSI/O O J-BUS I/O switch output
11 UNLOCK O PLL unlock output L:unlock H:lock
12 BUSSI I
TE
L 13942296513
13 BUSSO O J-BUS data output
14 BUSSCK O J-BUS clock output
15 - 20 NC -
21 GNDPORT -
22 VDDPORT -
23 NC -
24 AFCK O AF check output L:AF check
25 MONO O Monaural ON/OFF output H:Monaural ON
26 FM/AM O Output for FM power supply H:FM Mode
27 SEEK/STOP O Auto seek/Stop output H:Aut seek L:Stop
28 NC I
29 IFC I
30 VDDPLL -
31 OSC I
32 NC -
33 GNDPLL -
34 EO0 O Error out output from change pump
35 EO1 O Error out output from change pump
36 IC -
37 SD/ST I
38 STAGE I
39 NC -
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40 MOTOR O Main motor output H:At rotation
41 FF/REW O MS IC sensitivity switch output L:FF/REW
42 F/R O FWD/REV change input H:FWD L:REV
1-22
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80
65
Function
Key input 0
Key input 1
Key input 2
Level meter input
Signal meter input
Signal quality input
J-BUS data input
Non connect
GND for port
VDD for port
Non connect
Non connect
FM middle frequency counter input
VDD for PLL
FM/AM oscillation input
Non connect
GND for PLL
Connect to Ground
Seek/Stop port H:SD input
Seek/Stop port L:Stereo input
H:It is CD mode and there is REPEAT
L:Does not exist
Non connect
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8
Pin
Symbol I/O
No.
43 DOLBY O Dolby NR output H:Dolby NR ON
44 MS IN I Between tunes signal input
H:Between tunes
45 I2CSCK I/O E-VOL IC control clock I/O
46 I2CDAO O E-VOL IC control data output
47 I2CDAI I E-VOL IC control data input
48 REEL I Reel rotation detect signal input
49 SUBMO- O Sub motor output -
50 SUBMO+ O Sub motor output +
51 MODE I Mode position detection input H:Non-mode
L:Mode position
Q Q
52 TAPEIN I Cassette in detect input H:IN L:OUT
3 6 7 1 3
53 STBY I Standby detect input H:Eject side
L:Operation side
53 T-END I Tape end detect input 200ms L:tape end
54-59 NC - Non connect
60 MUTE O L:Mute ON H:Mute OFF
61 POWER O Power supply output H:power ON
62 TEL-MUTE I TEL-MUTE input
63, 64 NC - Non connect
65 ENC1 I Encoder signal input
66 ENC2 I Encoder signal input
67 ON I H:Operation mode L:Power save mode
68 STOP I Stop mode input
69 RDSCK I RDS clock input
70 RDSDA I RDS data input
71 REMOCON I Remocon signal input (Not used)
72 DETACH I Detach input It is "L" of 200ms or more and
an operation mode H:power save mode
73 JBUS INT I J-BUS Interruption input
74 REGCPU - Connects GND through the capacitor
of 0.1 F
75 GND - To ground
76 X2 - Crystal oscillator connection for system
77 X1 - clock oscillation
78 REGOSC - Connects GND through the capacitor
of 0.1 F
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79 VDD - Power supply
80 NC - Non connect
.
2 9 9 4 2 8
Function
1 5 0 5 8 2 9 9 4
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9 9
2 8 9 9