Ad Value For Diode Thm (Temperature); Operating Information For The Speaker Relay/Headphones Relay - Yamaha A-S701 Service Manual
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Also See for A-S701:
- Owner's manual (164 pages) ,
- User manual (20 pages) ,
- Owner's manual (35 pages)
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A-S701
2.
AD value for diode THM (temperature)
Turn the "TREBLE" knob to "+" and the "SPEAKERS" knob to "OFF". (Fig. 11)
The AD value for the diode THM (temperature) (TH501 on FUNCTION (4) P.C.B. and D111 on MAIN (1) P.C.B.) is indicated
in binary code (BCD) using the "INPUT" indicators. (Fig. 11)
* The AD value of the diode (D111 on MAIN (1) P.C.B.) temperature when a protection function is activated is stored,
regardless of the type of protection function.
LINE 3
LINE 2
7
6
2
= 128
2
= 64
0
0
0
0
0
1
1
0
1
0
1
1
3.
Operating information for the speaker relay/headphones relay
Turn the "TREBLE" knob to "+" and the "SPEAKERS" knob to "A". (Fig. 13)
The ON/OFF states of speaker relays A/B (RY101 and RY102 on MAIN (1) P.C.B.) and the headphones relay (RY103 on
MAIN (1) P.C.B.) when a protection function is activated are indicated using the "INPUT" indicators. (Fig. 13)
Note:
Since factory preset is reserved by turning off this unit when the "SPEAKERS" knob is set to the "A" position, be sure to set
the "SPEAKERS" knob to the "OFF" position before turning off this unit in case of keeping setup information stored in the
backup memory of the microprocessor.
Indication example
20
Fig. 11
"INPUT" indicators
Binary number (BCD) [Light up: 1, Off: 0]
LINE 1
OPTICAL
COAXIAL
5
4
2
= 32
2
= 16
2
0
0
1
0
0
0
0
0
1
0
1
1
Fig. 12
"CD" Indicator：Headphones relay ON/OFF
"TUNER" Indicator：Speaker relay B ON/OFF
"PHONO" Indicator：Speaker relay A ON/OFF
Example:
"CD" indicator lights up: Headphones relay is ON
"TUNER" indicator off: Speaker relay B is OFF
"PHONO" indicator off: Speaker relay A is OFF
* The state indicated in the example shows that headphones are plugged into the PHONES
jack and both speaker outputs A and B are off.
Fig. 13
CD
TUNER
3
2
1
= 8
2
= 4
2
= 2
0
0
0
1
0
0
0
0
0
0
0
0
1
0
0
1
1
1
Indication example
AD value
PHONO
0
2
=1
5V=255
0
0 /255
0
40 /255
0
64 /255
0
128 /255
0
168 /255
1
255 /255
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