Yamaha TX-497, Руководство по обслуживанию

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TX-497
TX-497
IC DATA
IC501 : LC866420A
8-bit Microprocessor
No. Port I/O Name Function
1 P17/PWM0 O /MMUTE Main mute
2 P30 I ROT1 Rotary encoder input
3 P31 I ROT0 This input available for ROTSW=H
4 P32 I MODEL Model 0
5 P33 I ROTSW Rotary encoder yes(H) or no(L)
6 P70/INT0 I
7 /RES I /RESET Reset
8 /P74/XT1 I
9 P75/XT2 I
10 VSS1 I GND GND
11 CF1 CF 6MHz
12 CF2 CF 6MHz
13 VDD1 I VDD +5V
14 P80/AN0 ADI KEYIN1 AD key input
15 P81/AN1 ADI KEYIN2 AD key input
16 P82/AN3 ADI KEYIN3 AD key input
17 P83/AN3 ADI METER Signal level input
18 P84/AN4 I
19 P85/AN5 I
20 P86/AN6 I
21 P87/AN7 ADI VER Version input
22 P71/INT1 I
23 P72/INT2 I /POWERDOWN Power down detect
24 P73/INT3 I REM REM input
25 S0/T0 O 13G FL segment
26 S1/T1 O 12G FL segment
27 S2/T2 O 11G FL segment
28 S3/T3 O 10G FL segment
29 S4/T4 O 9G FL segment
30 S5/T5 O 8G FL segment
31 S6/T6 O 7G FL segment
32 S7/T7 O 6G FL segment
33 S8/T8 O 5G FL segment
34 S9/T9 O 4G FL segment
35 S10/T10 O 3G FL segment
36 S11/T11 O 2G FL segment
37 S12/T12 O 1G FL segment
38 S13/T13
39 S14/T14
40 S15/T15
No. Port I/O Name Function
41 VDD2 I VDD +5V
42 VP I VDDVPP —24V
43 S16/PC0 O P1 FL segment
44 S17/PC1 O P2 FL segment
45 S18/PC2 O P3 FL segment
46 S19/PC3 O P4 FL segment
47 S20/PC4 O P5 FL segment
48 S21/PC5 O P6 FL segment
49 S22/PC6 O P7 FL segment
50 S23/PC7 O P8 FL segment
51 S24/PD0 O P9 FL segment
52 S25/PD1 O P10 FL segment
53 S26/PD2 O P11 FL segment
54 S27/PD3 O P12 FL segment
55 S28/PD4 O P13 FL segment
56 S29/PD5 O P14 FL segment
57 S30/PD6 O P15 FL segment
58 S31/PD7 O
59 S32/PE0 I/O
60 S33/PE1 I/O
61 S34/PE2 I/O
62 S35/PE3 I/O
63 S36/PE4 I/O
64 S37/PE5 I/O
65 P00 O
66 P01 O
67 P02 O
68 P03 O
69 P04 O /TMUTE Tuner mute
70 P05 O
71 P06 O RSYN Block Synchronous Detect Output
72 P07 O RCE Chip Enable
73 VSS2 I GND GND
74 P10/S00 O RDI Data Input
75 P11/SI0 SIN RDO Data Output
76 P12/SCK0 SCL RCL Clock Input
77 P13/SO1 I PLLDAT-i n Data input from PLL
78 P14/SI1 O PLLDAT-ou t Data output for PLL
79 P15/SCK1 O PLL-CLK PLL clock
80 P16/BUZ O PLLCE PLLCE
KEY INPUT
Key Input 1 2 3 4 5 6 7
Resistance (
Ω
) 0k 1.8k 2.7k 3.9k 6.8k 13k 39k
Extent of AD 00H~15H 16H~3DH 3EH~64H 65H~8AH 8BH~B0H B1H~D3H D4H~F0H
Extent of Voltage (V) 0.00~0.41 0.41~1.19 1.19~1.95 1.95~2.70 2.70~3.44 3.44~4.12 4.12~4.69
Pin No.14 KEYIN1 P3 P4 P5 P6 P7 P8
Pin No.15 KEYIN2 MODE EDIT (KMODE) MEMORY PAGE P1 P2
Pin No.16 KEYIN3 FREQ/TEXT PTY SEEK MODE PTY SEEK START EON FM/AM (MW/LW) TUNING DOWN TUNING UP