Service manual

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CD-BK2100V
1 MIC SW Input Microphone SW L: MIC OFF, H: MIC ON
2 MCLKCONT — Clock Control
Controls built-in clock generation circuit with external R
3 VALC — ALC operating voltage setting terminal
To set ALC operating voltage according to applied voltage
4 MIC1IN Input Microphone 1 input
To connect MIC1
5 ALC1 — ALC1 control
To connect ALC1 attack/recovery time setting capacitor
6 MIC1NFIN Input Microphone 1 negative feedback input
To connect low cut-off frequency of MIC1 amplifier setting capacitor
7 MIC1OUT Output Microphone 1 output
8 MIC1VOLIN Input Microphone 1 volume input
To connect capacitor to reduce noise generated at time of volume change
9 MIC2IN Input Microphone 2 input
To connect MIC2
10 ALC2 — ALC2 control
To connect ALC2 attack/recovery time setting capacitor
11 MIC2NFIN Input Microphone 2 negative feedback input
To connect low cut-off frequency of MIC2 amplifier setting capacitor
12 MIC2OUT Output Microphone 2 output
13 MIC2VOLIN Input Microphone 2 volume input
To connect capacitor to reduce noise generated at time of volume change
14 MICOUT Output Microphone output
Mixing output of MIC1 and MIC2
15 LPF1IN1 Input Low pass filter 1 input 1
Pre-filter before A/D convertor for digital delay
16 LPF1IN2 Input Low pass filter 1 input 2
Pre-filter before A/D convertor for digital delay
17 LPF1OUT Output Low pass filter 1 output
Pre-filter before A/D convertor for digital delay
18 ADINTOUT Output A/D integrator output
Composes D/A conversion integrator with external capacitor
19 ADINTIN Input A/D integrator input
Composes D/A conversion integrator with external capacitor
20 ADCONT — A/D control
To determine adaptive time constant of A/D convertor with ADM system
21 REF — Reference power output
To connect 1/2 Vcc output and filter capacitor
22 GND — Ground
23 VCC — Power supply
24 DACONT — D/A control
To determine adaptive time constant of D/A convertor with ADM system
25 DAINTIN Input D/A Integrator input
Composes D/A conversion integrator with external capacitor
26 DAINTOUT Output D/A Integrator output
Composes D/A conversion integrator with external capacitor
27 LPF2IN1 Input Low pass filter 2 input 1
Post-filter after D/A convertor for digital delay
28 LPF2IN2 Input Low pass filter 2 input 2
Post-filter after D/A convertor for digital delay
29 LPF2OUT Output Low pass filter 2 output
Post-filter after D/A convertor for digital delay
30 VOLIN Input Echo effect/Echo feed back volume input
To connect capacitor to reduce noise generated at time of volume change
31 LIN Input Lch line input
32 RIN Input Rch line input
ICK1 VHiM65856SP-1: Mic Amp. (M65856SP) (1/2)
Port NamePin No. Input/Output
Function