Philips TC8.1L CA, Руководство по обслуживанию

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Circuit Descriptions, Abbreviation List, and IC Data Sheets EN 29 TC8.1L CA 9.
9.3.9 IC1001 (MSP3425)
The SIF signal is sent out from Pin31 of IC201. It passes
through Q241, R241 and X241.
SIF will be finally sent into Pin2 of IC1001. An analog automatic
gain control circuit (AGC) allows a wide range of input levels.
The analog-to-digital conversion of the IF sound signal is done
by an A/D-converter. The high pass filter, formed by a coupling
capacitor at suppresses video components.
IC1001 is controlled via the I2C bus slave interface.
The (analog) sound signal will go from Pin26/27 of IC1001 to
Pin1/5 of IC601. IC601 is a class AB power audio amplifier. The
output voltage of IC601 drives the speakers. The volume is
adjusted via the I2C bus.
Table 9-3 Sound Processor
Pin No. Pin Name Type Short Description
1 AVSUP Analog power supply
+5V
2 IN IF Input 1
3 ANA_IN- IN IF common
4 TESTEN IN Test pin
5 XTAL_IN IN Crystal oscillator
6 XTAL_OUT OUT Crystal oscillator
7 TP Test pin
8 D_CTR_I/O_1 IN/OUT D_CTR_I/O_1
9 D_CTR_I/O_0 IN/OUT D_CTR_I/O_0
10 ADR_SEL IN I2C BUS address select
11 STANDBYQ IN Stand-by (Low-active)
12 I2C_CL IN/OUT I2C clock
13 I2C_DA IN/OUT I2C data
14 I2S_CL I2S clock
15 I2S_WS I2S word strobe
16 I2S_DA_OUT I2S data output
17 I2S_DA_IN1 I2S1 data input
18 ADR_CL ADR clock
19 DVSUP Digital power 5
V
20 DVSS Digital ground
21 I2S_DA_IN2 I2S2 data input
22 RESETQ IN Power-on-reset
23 NC Not connected
24 NC Not connected
25 VREF2 Reference ground 2
High-voltage part
26 DACM_R OUT Loudspeaker out, right
27 DACM_L OUT Loudspeaker out, left
28 NC Not connected
29 VREF1 Reference Ground 1
High voltage part
30 SC1_OUT_R OUT Audio 1 output, right
31 SC1_OUT_L OUT Audio 1 output, left
32 NC Not connected
33 AHVSUP Analog power supply
8.0V
34 CAPL_M Volume capacitor MAIN
35 AHVSS Analog ground
36 AGNDC Analog reference voltage
High-voltage part
37 SC2_IN_L IN Audio 2 input, left
38 SC2_IN_R IN Audio 2 input, right
39 ASG Analog shield Ground
40 SC1_IN_L IN Audio 1 input, left
41 SC1_IN_R IN Audio 1 input, right
42 VREFTOP Reference voltage IF A/D
converter
43 MONO_IN IN Mono input
44 AVSS Analog ground
Pin No. Pin Name Type Short Description