Service manual
22
EMX68S / EMX88S
IC BLOCK DIAGRAM
● AK4522VF-E2 (XW008A00) CODEC (CMOS A/D & D/A Converter) DSP: IC108
PIN PIN
NO.
NAME I/O FUNCTION
NO.
NAME I/O FUNCTION
1 VREFH I Positive voltage reference input , VA 13 SDTO O Audio serial data output
Used as a positive voltage reference by 14 SMUTE I Soft muteS
ADC & DAC, VREFH is conne externally When this pin goes H, soft mute cycle
to filtered VA. is intiated.
2 AINR+ I Rch analog positive input
When returning L, the output mute releases.
3 AINR- I Rch analog negative input 15 DEM0 I De-emphasis frequency select
4 AINL+ I Lch analog positive input 16 DEM1 I Master clock Input/X'tal input
5 AINL- I Lch analog negative input 17 MCKI I Digital power supply
6 VA - Analog power supply 18 VD - Digital ground
7 AGND - Analog ground 19 DGND - Reset
8 DIF0 I
Audio data interface format
20 /PD I Master clock select (Internal biased pin)
9 DIF1 I 21 CMODE I H: 384fs, L: 256fs, NS: 512fs
10 LRCK I Input/Output channel clock 22 AOUTL O Lch analog output
11 SCLK I Audio serial data clock 23 AOUTR O Rch analog output
12 SDTI I Audio serial data input 24 VCOM O Common voltage output , VA/2
NJM2060M(TE2)OP (XM560A00)
Quad Operational Amplifier
MIX68: IC905, IC906, IC907, IC908
IC909, IC910
MIX88: IC905, IC906, IC907, IC908
IC909, IC910
74HC08DT(XZ108A00)
AND
1
2
3
4
5
6
7
13
12
11
10
9
8
141A
1B
1Y
2Y
2A
2B
Vss
VDD
4B
4A
4Y
3Y
3A
3B
DSP: IC111
LB1403N
(
XZ348A00
)
LED Driver
D1
+ + + + +
+
Constant
Current
Circuit
1
D2
2
D3
3
D4
4
GND
5
D5
6
Amp
Output
7
IN
8
V
CC
9
MIX68: IC911, IC912, IC913
MIX88: IC911, IC912, IC913
TL072CPSR (XV423A00)
Dual Operational Amplifier
1
2
3
4-V
8
7
6
5
Output A +V
Non-Inverting
Input A
-DC Voltage Supply
+DC Voltage
Supply
Output B
Inverting
Input B
Non-Inverting
Input B
Inverting
Input A
+-
+-
NJM4558MT-1 (IG103520)
NJM2068MD-T1 (XJ553A00)
DSP-SPX1: IC105, IC106, IC107
MIX68: IC101, IC102, IC103, IC501
IC502, IC503, IC504, IC505
IC701, IC702, IC703, IC704
IC801, IC802, IC803, IC901
IC902, IC903, IC904, IC914
IC915, IC916, IC917, IC918
IC919, IC920, IC921, IC922
IC923
MIX88: IC101, IC102, IC103, IC301
IC302, IC303, IC501, IC502
IC503, IC504, IC505, IC701
IC702, IC703, IC704, IC801
IC802, IC803, IC901, IC902
IC903, IC904, IC914, IC915
IC916, IC917, IC918, IC919
IC920, IC921, IC922, IC923
74HCU04DT (XZ110A00)
INVERTER
11A
2
3
4
5
6
7
1Y
2A
2Y
3A
3Y
V
SS
8
9
10
11
12
13
14
V
DD
6A
6Y
5A
5Y
4A
4Y
DSP: IC104