KX-TDA6381X, KX-TDA6381SX — Panasonic PBX Service Manual (repair manual). Page 8

View Panasonic KX-TDA6381X / KX-TDA6381SX Service Manual online

8
KX-TDA6381X/KX-TDA6381SX
4.2.
Circuit Operations
4.2.1.
Description of Control System Circuits 
4.2.1.1.
Reset
On startup, releasing the ASIC reset is executed by EC_nRST through MPR.
After releasing the ASIC, the local reset signal should be sent to CODEC by releasing the soft rest from MPR, and CODEC fac-
tor should be downloaded from MPR.
• LED operational state display LED (2 colors)
Red ON: Fault (includes RESET)
Green ON: INS (line free)
Green flash (60/sec): INS (line busy)
Red flash (60/sec): OUS
OFF: the power section failure
4.2.1.2.
Local Highway Interface
Packs 2.048, 4.096, 8.192 MHz highway (Max.64 timeslot). (voice communication bus in the circuit board)
The PCM data of arbitrary streams 0~15 (128 timeslot / 1 stream) on the CT bus can switch to the arbitrary local highway (64
timeslot) by the local TSW.
The timeslot configuration example of the local highway is shown below.
Timeslots between slot 8 and slot 15 are used by the Sub Board.
Slot
PCM Data
Slot
PCM Data
Slot
PCM Data
0
CO#1
16
Not used
32-63
Not used
1
CO#2
17
Not used
2
CO#3
18
Not used
3
CO#4
19
Not used
4
CO#5
20
Not used
5
CO#6
21
Not used
6
CO#7
22
Not used
7
CO#8
23
Not used
8
CO#9
24
Not used
9
CO#10
25
Not used
10
CO#11
26
Not used
11
CO#12
27
Not used
12
CO#13
28
Not used
13
CO#14
29
Not used
14
CO#15
30
Not used
15
CO#16
31
Not used
Software reset
EC_nRST
IC3
Reset IC
IC4
+5V
+3.3V
+3.3V
+3.3V
(Green)
LED
(Red)
P22
P23
nHALT
U1-1/2
Q3
System reset in ASIC
E
C
B
U
S
LPR reset
ASIC
RST
LED
CPU
IC401
nlRQ0
nRES
Page of 76
Display

Click on the first or last page to see other KX-TDA6381X / KX-TDA6381SX service manuals if exist.