Kenwood DV-K750 Service Manual page 12

4-2 Pin description.
No Pin Name I/O
1 /RESET I
2,3 X/ETAL I / O Port of ceramic oscillator
4,5 MD0 / 1 I
6 /NMI –
7 /STBY –
8 VCC –
9 M-SCLK O
10 M-STAT O
11 M-CMD O
12 VSS –
13 POW.LED O
14 – –
15 /RAM-CS O
16 /RAM-WR O
17 /RAM-RD O
18 /REMOTE I
19 /M-READY I
20 /T-DQSY I
21 SBUSY I/O Synchro busy signal (BUSY)
22 SDATA I/O Synchro data signal (DATA)
23 DVD LED O
24 POWER O
25 MUTE 4 O
26 MUTE 3 O
27 MUTE 2 O
28 MUTE 1 O
29 AVCC –
30,31 KEY I
32,33 – –
34 SET I
35, 36 SMUTE1, 2 I
37 SMUTE3 I
38 AVSS –
39 KARA O
40 SUBW O
41 AC3 O
42 IFL2 O
43 IFL1 O
44 IFD O
45 IFS O
46 BANKA O
47 VCC –
48 CE I
49-52 A14-11 I
53-55 A10-8 O
56 VSS –
57-64 A7-0 O
65-72 D0-7 I/O S-RAM access bus data
73 VSS –
74,75 BANK B,C O
76 VFD-CE O
77 OSD-CS O
78 OSD/VFD-SD O
79 T-SRDT I
80 VFD-CL O
CIRCUIT DESCRIPTION
Input port of microprocessor reset
Operation mode 0 and 1
No use
No use
Power supply (+5V)
Output port of clock signal to the main processor (DSPSCLK)
Input port to the main microprocessor (SRDT)
Output port to the main processor (DQSY)
GND
Standby LED (H : standby)
No use
Access mode of extra-address ( / CS)
Read mode of extra-address ( / WE)
Write mode of extra-address ( / OE)
Input port of remote signal
Ready/resend signal to the main microprocessor
Input port of read signal from CD-TEXT IC (DQSY)
DVD LED (H : light, L : dis-light)
Power LED (H : ON, L : OFF)
Mute 4, analog mute (SW)
Mute 3, analog mute (C)
Mute 2, analog mute (SL / SR)
Mute 1, analog mute
A/D standard voltage
Key input 1, 2
No use
Model selection (H : DV-S700, L : DV-K750)
Input port of shuttle switch 1, 2
Output selection of 6 channel (H : yes, L : no)
GND
KARAOKE output (H : on, L : off)
Sub woofer output (H : on, L : off)
AC-3 output (H : on, L : other)
Latch signal of serial control to electronics volume IC (TC9210P) (STB)
Latch signal of serial control to KARAOKE IC (TC9409BF) (IFL)
Serial data output to electronics volume IC and KARAOKE IC (DATA, IFD)
Serial clock output to electronics volume IC and KARAOKE IC (CK, IFS)
S-RAM bank selection A
Power supply (+5V)
Chip enable port
No use
S-RAM access bus address
GND
S-RAM access bus address
–
S-RAM bank select b, c
VFD display IC serial control latch (CE)
OSD display IC serial control latch (STB)
OSD display IC/VFD display ic serial data output (SIN / DI)
CD-TEXT IC data input (SRDT)
CD-TEXT/OSD/VFD IC serial clock (SCLK / SCLK / CL)
DV-K750/S700
Description
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