Marantz AV8003 Service Manual page 21

Abnormal detection operation when the power is turned
on
_STAND BY (136pin)
(OUT)
_P_DOWN (25pin)
(IN)
_P_LINE_FAIL (135pin)
（
IN)
_5V_DOWN (137pin)
(IN)
各
ch MUTE
EACH CHANNEL MUTE
：
MUTE OFF
(OUT)
_PRE_MUTE
(IC20: Q5, 14pin)
(OUT)
FRONT_OFF
(IC20: Q4, 7pin)
(OUT)
_STAND BY LED (94pin)
(OUT)
A
200 msec
3.5 sec
AC POWER SUPPLY: POWER ON
不定
INCONSTANT
不定
INCONSTANT
Hi: MUTE ON
Lo: MUTE RELAY ON
Lo: FRONT ON
：
STANDBY LED LIGHT OUT
：消灯
STAND BY LED
電源 時の異常検出動作
ON
_STAND BY(OUT)
が を検出したら、
5V_DOWN Lo
_STANDBY (OUT): If it detects of
And Lo is detected of _P_LINE_FAIL or 5V_DOWN,
it will be made L after that.
①
if =H
①
if =L
：
Hi Normal
Lo: Abnormal
異常
①
Lo:
：
Hi Normal
Lo: Abnormal
①
異常
Lo:
Flickering (every 500 msec)
点滅 間隔
(500 msec )
19
電源立ち上げ：異常時
：①（ ）で
3.5 sec _P_LINE_FAIL
を以後
_STAND BY
①（ ）
3.5 sec
の処理→
_STANDBY LED A
How to respond to the flickering
→
_STANDBY LED A
の処理→
_STANDBY LED A
How to respond to the flickering
→
_STANDBY LED A
または
にする
Lo