SITRONICS LCD-1502, Руководство по обслуживанию

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IC602(24LC21A)
Pin No. Pin Name Function Pin No. Pin Name Function
1-3 NC No Connection 4 Vss Ground
5 SDA Serial Address/Data I/O 6 SCL Serial Clock (Bi-directional Mode)
7 VCLK Serial Clock (Transmit-Only Mode) 8 Vcc +2.5V to 5.5V Power Supply
IC706 (7809) , IC707(7805)
Pin No. Pin Name Function Pin No. Pin Name Function
1 INPUT 2 GND
3 OUTPUT
Pin No. Port Name Function Pin No. Port Name Function
1
I
0
Inputs 8
O
3
Outputs
2
O
0
Outputs 9
I
3
Inputs
3
I
1
Inputs 10
O
4
Outputs
4
O
1
Outputs 11
I
4
Inputs
5
I
2
Inputs 12
O
5
Outputs
6
O
2
Outputs 13
I
5
Inputs
7 GND Ground 14 VCC Power supply
IC703 (AN5276)
Pin No. Pin Name Function Pin No. Pin Name Function
1 N.C. 7 Ch.2 output
2 Ch.1 input 8 Mute
3 Ripple filter 9 Output GND
4 Input GND 10 Vcc
5 Ch.2 input 11 Standby
6 N.C. 12 Ch.1 output
Information of ICs
-30-
IC603(SN74ACT14DR)
IC702 (NJW1137)
Pin No. Pin Name Function Pin No. Pin Name Function
1 Ina Ach Input 16 VCC Power Supply Pin
2 BBE1a Ach BBE Filter1 (Process) 17 AUX1 Auxiliary Output1
3 BBE2a Ach BBE Filter2 (Lo Contour) 18 AUX0 Auxiliary Output0
4 BBE OUTa Ach Output for the Other Accessories 19 CTL DAC Output for Tone Low Frequency
5 TONE Ina Ach Input From the Other Accessories 20 CTH DAC Output for Tone High Frequency
6 TONE-Ha Ach Treble Filter 21 VREF Reference Voltage
7 TONE-La Ach Bass Filter 22 SR-FIL NJRC Original Surround Filter
8 OUTa Ach Output 23 OUTb Bch Output
9 AGC AGC 24 TONE-Lb Bch Bass Filter
10 SS-FIL Simulated Stereo Filter 25 TONE-HB Bch Treble Filter
11 CVB DAC Output for Bch Volume & Balance 26 TONE Inb Bch Input from the Other Accessories
12 CVA DAC Output for Ach Volume & Balance 27 BBE OUTb Bch Output for the other Accessories
13 SDA SDA Data Input (I2C BUS) 28 BBE 2b Bch BBE Filter2 (process)
14 SCL SCL Data Input (I2C BUS) 29 BBE1b Bch BBE Filter1 (Lo Contour)
15 GND GND 30 Inb Bch Input