Ad/Fan; P0/P1 - Yamaha RX-Z9 Service Manual

RX-Z9/DSP-Z9

19. AD/FAN

With this sub-menu used, the key scanning, A/D value of the
voltage at the abnormality detect (protection) port, etc. are
displayed. Also, this is the menu for executing the FAN drive
test. The A/D conversion value is displayed in % (reference
voltage of 5V as 100%). The state before audio signal pro-
cessing is kept.
* The numeric value in the diagram is for reference.
D0/D1
This is the A/D value of the speaker DC output detect ports
PRD0 and PRD1 (main microprocessors).
Detects the output signals of speakers Front L,
D0 (PRD0):
SURROUND L, SURROUND BACK L and
PRESENCE L/R.
(Normal value: 1 to 13)
Detects the output signals of speakers Front R,
D1 (PRD1):
CENTER, SURROUND R and SURROUND
BACK R.
(Normal value: 1 to 13)
When the value is outside of the normal range, the protec-
tion function works to turn off the power.

P0/P1

This is the A/D value of the power voltage abnormality de-
tect ports PRV1 and PRV2 (main microprocessors).
Detects ±12, +5V, transformer secondary wind-
P0 (PRV1):
ing voltage (RE-BL-RE, YE-BR-YE, GY-VI-GY).
(Normal value: 12 to 23)
Detects +5V1, +5V2, +5D1, +5D2, +3.3D, +9V,
P1 (PRV2):
-5V and +5A.
(Normal value: 65 to 75)
When the value is outside of the normal range, the protec-
tion function works to turn off the power.
In the PURE DIRECT setting, only P0 (PRV1) is detected.
64
19.AD/FAN
D0:006 D1:006
19.AD/FAN
P0:018 P1:070