Marantz AV8003 Service Manual page 20

Check 3
For the product to start operating normally when the power
is turned on, the circuit connected to each input port of _P
DOWN, _P LINE FAIL and 5V_DOWN needs to be operating
normally.
• TIMING CHART
Normal 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
(OUT)
_PRE_MUTE
(IC20: Q5, 14pin)
(OUT)
FRONT_OFF
(IC20: Q4, 7pin)
(OUT)
_STAND BY LED (94pin)
(OUT)
200 msec
3.5 sec
① ：
_STAND BY CANCEL
：解除
_STAND BY
AC POWER SUPPLY: POWER ON
不定
INCONSTANT
不定
INCONSTANT
：
OFF
Low LEVEL
：
STANDBY LED LIGHT OUT
：消灯
STAND BY LED
Check 3
電源 時に製品が通常動作を開始するためには、下図の様な
ON
で
Timing _P DOWN, _P LINE FAIL, __5V_DOWN
力 で接続されている回路が正常動作している必要がありま
Port
す。
• TIMING CHART
電源 時の正常動作
ON
7 sec
：
Hi P_LINE=OK
②
After 3.5 sec, the detection start
後、検出開始
3.5 sec
+5VDD=OK
③
After 3.5 sec, the detection start
後、検出開始
3.5 sec
：
MUTE ON
：
MUTE RELAY ON
18
の各入
電源立ち上げ：正常時
1 sec
：
MUTE OFF
：
MUTE RELAY OFF