Marantz AV8003 - Check 3: Circuit Timing for Normal Operation

18
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
Check 3
電源ON時に製品が通常動作を開始するためには、下図の様な
Timing で _P DOWN, _P LINE FAIL, __5V_DOWN の各入
力Port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
す。
• TIMING CHART
電源ON時の正常動作
_PRE_MUTE
(IC20: Q5, 14pin)
(OUT)
MUTE RELAY
：OFF
_STAND BY (136pin)
(OUT)
_STAND BY LED (94pin)
(OUT)
_P_DOWN (25pin)
(IN)
_P_LINE_FAIL (135pin)
（IN)
_5V_DOWN (137pin)
(IN)
Hi
：P_LINE=OK
_STAND BY
：解除
AC POWER SUPPLY: POWER ON
STANDBY LED
：LIGHT OUT
STAND BY LED
：消灯
①
3.5 sec後、検出開始
INCONSTANT
電源立ち上げ：正常時
7 sec
3.5 sec
②
MUTE RELAY：ON
MUTE
：OFF
MUTE
：OFF
FRONT_OFF
(IC20: Q4, 7pin)
(OUT)
Low LEVEL
200 msec
3.5 sec
後、検出開始
③
+5VDD=OK
MUTE
：ON
各ch MUTE
EACH CHANNEL MUTE
(OUT)
1 sec
_STAND BY
：CANCEL
INCONSTANT
不定
不定
After 3.5 sec, the detection start
After 3.5 sec, the detection start