51
SC-27
5
6
7
8
5
6
7
8
A
B
C
D
E
F
DIGITAL MAIN ASSY
E
DIGITAL MAIN Power Supply Failure Detection
Item
Purpose
Detection Method
Status of E
q
uipment
Warning Indication
Remarks
DIGITAL
MAI
N
power
supply
failure
detection
(*1) Conditions when XVDDERR becomes "L"
1. Q1997 turns O
N
:
W
hen
V
+6DDD becomes higher than the setting value, Q1997 becomes O
N
.
2. Q199
8
turns O
N
:
W
hen
V
+5_DDD becomes higher than the setting value, Q199
8
becomes O
N
.
3. Q1999 turns O
N
:
W
hen
V
+13_U
N
becomes lower than 3.
8V
, Q1999 becomes O
N
.
W
hen P
W
RGD of IC1900 becomes low (
V
+5HD becomes lower than the setting value), Q1999 becomes O
N
.
W
hen PGOOD of IC1930 becomes low (
V
+1R
8
_HHH or
V
+3R3_HHH drift from the setting value), Q1999 becomes
O
N
.
W
hen
V
+6_DDD becomes lower than 3.
8V
, Q1999 becomes O
N
.
Detect abnormal
voltage in the
Digital Power
Supply circuit
Detect when X
V
DDERR
port becomes "L" (*1).
(IC
8
001 70pin)
Shuts down
Blinks Center Blue LED
During Standby mode, simultaneously press and hold the "
↓
" and "MULTI-ZO
N
E O
N
/OFF" keys
for 5 seconds.
[How to Enter Release Mode]
V
+5R6_U
D1997
1SS352
R1999
4.7k
V
+13_U
N
P
W
RGD
IC1900
PGOOD
IC1930
D199
8
DAP202U
R
N
4903
Q1999
R
N
4903
Q1999
D1999
UDZS5R6(B)
R1997
1k
R199
8
100
C1999
N
M
C199
8
0.1u/10
C1997
0.1u/10
Q199
8
2SC40
8
1(QR)
G
N
DD
R1996
4.7k
D1996
1SS352
Q1997
2SC40
8
1(QR)
C1996
N
M
R1995
100
R1994
1k
D1995
UDZS6R
8
(B)
R19
88
N
M
R19
8
9
N
M
C1991
N
M
Q1996
N
M
D1994
N
M
V
+13_U
N
V
+5_DDD
V
+6_DDD
