Yamaha RX-V3000RDS, Service Manual

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RX-V3000/RX-V3000RDS
RX-V3000
RX-V3000RDS
24
10. FAN/AD
The sub-menu of this menu displays the A/D conversion value of the CPU (function circuit board IC526) which
detects the keys and protection functions of the main unit in %. (reference voltage 5V: 100%)
It also displays the history of the fan being driven. When in KY0/KY1/RECOUT page, it is not possible to operate the
keys of the main unit because the values of all keys are detected. But one click on the VOLUME of the main unit will
cancel this function and sets to the next sub-menu. If this has occurred, restore the DIAG menu being used for
testing. The signal processing state remains the same as that before executing this menu.
10. FAN/AD
FAN HISTORY:000
FAN HISTORY (History of fan being driven) [Remote control code: – – – – ]
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.
bit 2 1 0
0 0 0
FAN 3.0V
FAN 3.7V
FAN 5.0V
* Selecting “RESERVED” for DIAG menu No.9 will clear the history.
When there is a history of the fan operation: 1
THM PRD PRV
028 006 009
The above figures are ex-
amples for reference.
THM/PRD/PRV [Remote control code: 7A—0B (CD SKIP –)]
(Detection of the temperature of the heat sink and protection function)
THM: Detection of the temperature of the heat sink (Normal value: 6~40) 0.3V~ 2.0V (reference voltage)
At 5% or less, the protection function works to turn off the power. At more than 40%,
possibility is that there is an error in the temperature detection system.
PRD: Protection value for DC detection (Normal value: 1~13) 0.05V~ 0.65V (reference voltage)
When the value is out of the normal value range, the protection function works to turn
off the power.
PRV: Protection value for power voltage (Normal value: 5~15) 0.25V~ 0.75V (reference voltage)
When the value is out of the normal value range, the protection function works to turn
off the power.
KY0 KY1 RECOUT
100 100 060
KY0/KY1/RECOUT (Detection of key scan/REC OUT)[Remote control code: – – – – ]
(*1) : “EFFECT” and “6CH INPUT” keys pressed
simultaneously
Indicate KY0
0 INPUT w
10 INPUT q
20 INPUT MODE
30 DIAG(*1)
40 6CH INPUT
50 EFFECT
60 SPEAKERS A
70 SPEAKERS B
80 PROC. DIRECT
90 BASS EXTENS.
100 KEY OFF state
Indicate KY1
0 DSP PROG.
10 PRESET/TUN.
20 FM/AM
30 MEMORY
40 TUNING MODE
50 PTY START
60 PTY MODE
70 RDS EON
80 RDS MODE
90 –
100 KEY OFF state
Indicate REC OUT
0 MD/TAPE
15 SAT
30 CD
44 V-AUX
60 SOURCE
76 CABLE
92 PHONO
122 CD-R
137 VCR 1
153 TUNER
170 VCR 2/DVR
186 DVD
202 D-TV/LD
KY0/KY1: Panel key of the main unit (10% step)
• When the standard value is deviated by
±
4%, KEY A/D
fails to function properly. In this case, check the circuit
voltages, soldering condition, etc.
RECOUT: Indicates se-
lected REC OUT position
(AD conversion value 100%: 255)