Sharp DX-SX1H, Руководство по обслуживанию

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DX-SX1H
– 43 –
IC102 VH+-1: DC/DC Converter (BP5220)
Pin
No. Terminal
Name
Function
1 FB Feedback terminal
2 VOUT Output terminal
3 GND GND
4 CTL ON, OFF terminal
5* N.C. Not used
6* ADJ Output voltage fine adjustment terminal
7* N.C. Not used
8* — Cut pin
9 VIN Input terminal
In this unit, the terminal with asterisk mark (*) is (open)
terminal which is not connected to the outside.
9
VIN
7
N.C.
N.C. N.C.
5
N.C.
4
CTL
3
GND
2
VOUT
1
FB
6
ADJ
POWER
CIRCUIT
DRIVING CIRCUIT
CONTROL CIRCUIT
Figure 43-1 BLOCK DIAGRAM OF IC
1 RSTN Input terminal with pull-up System reset input (Reset at L)
2 ADRS1 Input terminal with pull-up Chip address set terminal 1
3 ADRS2 Input terminal with pull-up Chip address set terminal 2
4 DVDD — Digital VDD
5 LOUT Output L channel audio output
6 LIN Input L channel audio input
7 AVDD — Analog VDD
8 VRL Output Capacity connecting terminal for L channel reference voltage (VDD/2)
9 VRR Output Capacity connecting terminal for R channel reference voltage (VDD/2)
10 AVSS — Analog VSS
11 RIN Input R channel audio input
12 ROUT Output R channel audio output
13 DVSS — Digital VSS
14 MLEN Input terminal with pull-up Microcomputer latch enable input
15 MCK Input terminal with pull-up Microcomputer clock input
16 MDT Input terminal with pull-up Microcomputer data
Pin No. Terminal Name Input/Output Function
IC301 VHiSM6451AV-1: Volume Control (SM6451AV)
Figure 43-2 BLOCK DIAGRAM OF IC
RSTN
ADRS1
ADRS2
DVDD
LOUT
LIN
AVDD
VRL
MDT
MCK
MLEN
DVSS
ROUT
RIN
AVSS
VRR
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
5
LOUT
8
VRL
7
AVDD
10
AVSS
9
VRR
12
11
ROUT
RIN
13
DVSS
4
DVDD
3
ADRS2
2
ADRS1
1
RSTN
16
MDT
15
MCK
14
MLEN
6
LIN
I/F CONTROL
REFERENCE
VOLTAGE CIRCUIT
ATTENUATION
CONTROL
ATTENUATION
CONTROL
ATTENUATION DECODER
CHIP
ADDRESS
DECODER