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The item received was as described, as expected. I was pleased with the order. Thank you.
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Superb rendition. Drawings (schematics) complete and unabridged. I do a great deal of vintage audio restoration. Documentation is essential for successful repairs. I have found sources over the years that offer good documentation, but rarely all that is necessary. Owner's Manuals has filled that void with complete and legible documentation. They have narrowed my "favorites" to a more manageable collection. This Denon manual in particular contained the latest revisions level, and offered alterations favorable to updating the item. The Illustrated Parts Breakdown (IPB) was well enough detailed to simplify part symbols and physical locations. You will not be disappointed!
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Clear and concise. Saved me a lot of time and money.
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Superb manual. Exactly what I ordered and made available in a very timely manner.
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very fast detailed and accurate hope to do business again
TX-SR805/SA805 OPERATION CHECK-4
Condition of Protect Mode
The unit will go into Protect mode under the following conditions. (T: Thermal sensor temperature)
1. Thermal condition
Immediately T <= -30 C or Immediately T > 110 C VOLH
2. DC voltage condition
The sum of dc voltage of 7 channel speaker outputs is more than 7 V.
3. Current condition
Protect will be On if speaker output ac current >= 35 A Protect will not be On if speaker output ac current >= 11.7 A This condition is equivalent to OPERATION CHECK-2. Refer to the page 2. Test wave form:
2 msec 2 msec
20 msec
Condition of Power Supply Voltage Control
The power supply voltage(VH, VM or VL) for power amplifiers is changed by the relays: RL6601, 6602, 6611, 6612 on NAPS-9040. VH > VM > VL T: Thermal sensor temperature VOLH: Pin #99 input voltage of Main microprocessor: Q7001 (Refer to SD-4:D5 and SD-8:D2 of Schematic Diagram) This is created by the largest ac voltage in 7 speaker outputs. Conditions: Speaker imp. = 6 or 8 ohm VH: 0V < VOLH < 0.4V and T < 85 C VM: 0.4V < VOLH < 2.0V and T < 85 C VL: 2.0V < VOLH < 3.3V(Vcc) and T < 85 C VL: T > 85 C Speaker imp. = 4 ohm or BTL VM: 0V < VOLH < 0.4V and T < 85 C VL: 0.4V < VOLH < 2.0V and T < 85 C VL: 2.0V < VOLH < 3.3V(Vcc) and T < 85 C VL: T > 85 C
Condition of Cooling Fan Operation
The cooling fan will stop or rotate under the following conditions. Thermal Sensor Temperature(T) 0V 60 C STOP 0.4V STOP 2.0V MID HIGH HIGH HIGH SPEED SPEED SPEED SPEED MID HIGH HIGH SPEED SPEED SPEED 70 C 80 C Note: �VOLH=0.4V� is equivalent to 0.8W(8 ohm, 7 ch) �VOLH=2.0V� is equivalent to Max power(8 ohm, 3 ch)
STOP
LOW MID SPEED SPEED
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