Yamaha RX-Z1 Service Manual page 34

RX-Z1/DSP-AZ1
12. FAN/AD
This menu is used to display the A/D conversion value of
the main CPU which detects panel keys of the main unit
and protection functions in % using the sub-menu.
(Reference voltage 5V as 100%) During signal
processing, the condition before execution is maintained.
It also displays the history of the fan being driven. When
K0/K1 menu is selected, keys become non-operable due
to detection of the values of all keys. However, it is
possible to advance to the next sub-menu by turning the
input selector of the main unit. At this time, note that
turning more than 1 click would cause the input to change.
* The figures in the diagram are given as reference only.
FAN HISTORY (History of fan being driven)
The voltage value detected from the temperature detect
circuit is read by the A/D function of the microprocessor as
a data. Based on that temperature data, the fan driving
speed is controlled in 3 stages. How the fan has been
driven is displayed as the history.
12. FAN/AD
FAN HISTORY:000
bit 2 1 0
0 0 0
When there is a history of the fan operation: 1
KY0/KY1 (Panel key of main unit)
A/D of the key fails to function properly when the standard
value is deviated by ±4%. In this case, check the constant
of partial pressure resistor, solder condition, etc. Refer to
table 1.
[Table 1]
RX-Z1
Display
00+2 INPUT MODE
10±2 PRESET/TUNING
20±2 PRESET/TUNING
30±2 EDIT
40±2 6CH INPUT
50±2 MEMORY
60±2 TUNING MODE
70±2
80±2
90±2
100 KEY OFF
(*1): "PROGRAM " and "EFFECT"
33
* Selecting "RESERVED" for DIAG menu No. 11 and the factory preset
FAN 3.0V
*
FAN 3.7V
FAN 5.0V
KY0 KY1
100 100
K0 K1
A/B/C/D/E
–
DIAG (*1)
PROGRAM
EFFECT
FM/AM
PROGRAM
– –
– SPEAKERS A
– –
KEY OFF
state will clear the history.
DSP-AZ1
Display
00+2
10±2
20±2
30±2
40±2
50±2
60±2
70±2
80±2
90±2
100
(*2): "SET MENU +" and "NEXT"
K0 K1
INPUT MODE EFFECT
PROGRAM –
PROGRAM DIAG (*2)
– SET MENU +
– NEXT
– 6CH INPUT
– – SET MENU
– –
– SPEAKERS A
– –
KEY OFF KEY OFF