4
KRF-V5200D
CIRCUIT DESCRIPTION
●
Fan Motor Control
Fan control signal from the microprocessor IC601 (X08)
is supplied to the base of the transistor Q502 if changes
thermal level. Normally the base voltage of Q502 is low and
Q502 is not turn-on. The base of Q503 is minus voltage
so Q503 is turn-on. Zener diodes D512 and 513 are short
circuitry if Q503 is on. The collector’s voltage of Q503 will be
the same as zener diode D524, -10volts. This voltage leads
fan motor to turn with low speed.
●
AK4586VQP (IC401: X08) Port Description
Pin No.
Pin Name
I/O
Description
1
XTO
OUT
Crystal output port
2
XTI
IN
Crystal input port
3
DVDD
-
Power supply for digital circuit (4.5 to 5.5V)
4
DVSS
-
Ground for digital circuit
5
TVDD
-
Buffer of power supply (2.7 to 5.5V)
6
TX
OUT
Transmit channel (though data) output port.
7
MCKO
OUT
Master clock output port
8
LRCK
IN/OUT
Input/output channel clock port
9
BICK
IN/OUT
Audio serial data clock port
10
SDTO
OUT
Audio serial data output port
11
SDTI1
IN
DAC1 audio serial data input port
12
SDTI2
IN
DAC2 audio serial data input port
13
SDTI3
IN
DAC3 audio serial data input port
14
INT0
OUT
Interrupt 0 port
15
INT1
OUT
Interrupt 1 port
16
CDTO
OUT
Control data output port for 4-serial control mode
17
CDTI
IN
Control data input port for 4-serial control mode
18
CCLK
IN
Control data clock port for 4-serial control mode
19
CSN
IN
Chip selector port for 4-serial control mode
20
DZF2
OUT
Zero detector input port-2.
21
AVSS
-
Ground for analog circuit
22
AVDD
-
Power supply for analog circuit (4.5 to 5.5V)
23
VREFH
IN
Reference voltage port, AVDD
24
VCOM
OUT
Common voltage port, AVDD/2
25
DZF1
OUT
Zero detector input port-1.
26
LOUT3
OUT
L-ch analog output port from internal DAC3
27
ROUT3
OUT
R-ch analog output port from internal DAC3
28
LOUT2
OUT
L-ch analog output port from internal DAC2
29
ROUT2
OUT
R-ch analog output port from internal DAC2
30
LOUT1
OUT
L-ch analog output port from internal DAC1
When thermal sensor works, the microprocessor will send
the signal to Q502 and Q502 is turn-on. The base of Q503
becomes high level and it is not turn-on. Zener diodes D512
and 513 work. The base of Q504 is high level, -26volts. Fan
motor will turn with high speed.
Summary of Contents for KRF-V5200D
Page 40: ...KRF V5200D ...
