PDP-5016HD
153
5
7
8
5
6
7
8
C
D
F
A
B
E
5.2.3 BLOCK DIAGRAM OF THE SHUTDOWN SIGNAL
5.2.4 DIAGNOSIS OF THE SD (SHUTDOWN)
INTERFACE Assy
(AWV2373)
SENSOR Assy
Green
Red
LED
IC3401
SQ IC
IC3156
EEPROM
IC3651
Temp.
sensor
IC3151
Module
microcomputer
TEMP1
E_SCL
E_SDA
TXD_SQ
RXD_SQ
CLK_SQ
CE_SQ
BUSY_SQ
IC3652
Backup
EEPROM
SCL
SDA
IC3302
3.3V
RST
IC3304
1.2V
RST
IC3303
OR
RST2
IC3157
DAC
IC3301
Flash
ROM
SD_TRIGGER
DIGITAL Assy
2
2
3
4
1
1
2
2
3
4
1
1
Normal operation
Stanby ; Red
Power ON; Green
• Check LED flashes on
INTERFACE Assy
Note: The figure number shows the LED blinking times if Shutdown.
Prediction of failure symptoms when a SD (Shutdown) generated
LED Flashing
Count
(Interface Assy)
SD Circuit
Subcategory
Point to be Checked
(Possible defective part)
Green 1
Green 3
Green 4
Sequence
processor NG
IIC communication
failure of the module
microcomputer
Power decrease of
DIGITAL DCDC
Panel having higher
temperature
(TEMP1)
Communication failure
Sequence stop
Busy
Version error
DIGITAL Assy EEPROM
PANEL SENSOR EEPROM
DAC
CLK_SQ/TXD_SQ/RXD_SQ
(IC3151/IC3401)
(CN3001/IC3401)
BUSY_SQ , (IC3401)
SQ-IC version, (IC3301/IC3401)
IIC communication of IC3156
(IC3151/IC3156)
IC communication of IC3652
(IC3151/IC3652)
IIC communication of IC3157
(IC3151/IC3157)
SQ-IC
MD-IIC
RST2
TMP_NG
RTRY
SQNO
BUSY
VER-HS
EEPROM
BACKUP
DAC
-
TEMP1
DCDC converter output voltage
(AXY1137-)
V+12V voltage
(Power supply Assy)
Surrounding temperature
Abnormality of temperature sensor
(AWW1140: (IC3901))
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