Sanyo PLC-ET30L - Page 82

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Troubleshooting
IC301
SCAN
CONVERTER
&
SYSTEM
CONTROL
67
D[0-7] D[0-7]
68 8
3
K8A K66A
K8J K66J
9 5 6 8 5
10 12
4 2
145 251 146 33
17 11 15 14
65 176 66 444 355
9 6 5
6
11 13 3 1
108
80
107 105 104 103
SDATA_I/O
2
THERM1_DETECT
LAMP_DC_ON_EX
FPGA_PWM
FAN_PWM
15V_SW_EX
LAMP_DC_ON
15V_SW
FAN_SW_1 FAN_SW_2
FAN_DAC1_PW
FAN_SPEED1FAN_MTR1
FAN_MTR2 FAN_MTR3 FAN_MTR4 FAN_MTR5
FAN_SPEED2 FAN_SPEED3 FAN_SPEED4 FAN_SPEED5
FAN_DAC2_PW FAN_DAC3_PW
FAN_PWM_K8J
FAN_SW_1EX FAN_SW_2EX
SDA0_S5V
SCL0_S5V
PW_SDA0
PW_SCL0
IC1881
INPUT
EXPANDER
<TC74LCX541>
IC8841
THERMAL
SENSOR
<MCP9801>
IC4801
INVERTER
IC861
BUFFER
<TC74LCX541>
IC7821
INVERTER
<74LVC14AP>
IC7201
FPGA
K66H
1 3
K8E
TH901
THERMISTOR
(ROOM)
(LAMP)
(Sensor B)
1 3
FN905
(PANEL)
INTAKE
K66G
1 3
FN904
(PANEL)
INTAKE
K66F
1 3
FN903
(LAMP)
INTAKE
K66E
1 3
FN902
(POWER)
EXHAUS
T
K66D
1 3
FN901
(LAMP)
EXHAUS
T
MAIN
POWER(DC)
K8F
TH902
THERMISTOR
(B-PANEL)
1 3
33 37 11 12
2 3 4 5 6 7 8 9
10
1 2 3 4
THERM1 THERM2
THERM2_DETECT
IC1801
I/O
EXPANDER
<TE7783>
(Sensor A) (Sensor C)
Q1361 Q1363
No Power
(Check fan control stage)
If one of the fans has an error,
both of signals LAMP_DC_ON and
15V_SW become "Low" to stop the
operation of power supply circuit.
Check FAN_SPEED
feeed back signals.
L: Failure
These fans are con-
trolled by the DC voltage
of signals FAN_DAC1_PW,
FAN_DAC2_PW, FAN_DAC3_PW.
These fans are controlled by
the pulse ware duty ratio of
the signal FAN_PWM_K8J .