Starting In The Protection Cancel Mode - Yamaha A-S701 Service Manual

A-S701
● Starting in the Protection Cancel mode
CAUTION!
Using this product with the protection function disabled may cause further damage to this unit. Use special care for this
point when using this mode.
If the protection function works and causes hindrance to trouble shoot, cancel the protection function as described below,
and it will be possible to enter the self-diagnostic function mode.
(The protection functions other than the excess current detect function will be disabled.)
Press the "z" (power) switch to turn off this unit. (Fig. 19)
1.
2. Connect the power cable of this unit to the AC outlet. (Fig. 19)
Set the "SPEAKERS" knob to the "OFF" position. (Fig. 19)
3.
Note: Since factory preset is reserved by turning off this unit when the "SPEAKERS" knob is set to the "A" position, set
the "SPEAKERS" knob to the "OFF" position before starting the self-diagnostic function mode.
4. Set the "BASS", "TREBLE" and "BALANCE" knobs to the top positions. (Fig. 19)
Note: Be sure to set the "BASS", "TREBLE" and "BALANCE" knobs to the top positions. These positions are stored when the
self-diagnostic function mode is started, and software corrections are made to the top position for each selector.
In addition, the self diagnostic function mode cannot be started if the top positions for the knobs are off by more
than ± 5% of the 2.5 V input voltage.
5. Set the "LOUDNESS" knob to the "FLAT" position. (Fig. 19)
6. Press the "z" (power) key to turn on this unit. (Fig. 19)
7. Press the "z" (AMP) key on the remote control to set this unit to standby. (Fig. 20)
8. Repeat pressing the "PURE DIRECT" key 12 times within 15 seconds. (Fig. 19)
9. Press the "z" (AMP) key on the remote control to turn on this unit. (Fig. 20)
This unit starts the self-diagnostic function mode.
"BASS" , "TREBLE" , "BALANCE" knobs
Power cable
AC outlet
" " (Power) switch
24
Keys of this unit
"LOUDNESS" knob
"SPEAKERS" knob
Fig. 19
Key on Remote control
"PURE DIRECT" key
" " (AMP) key
Fig. 20