Block Diagram Of The Shutdown Signal; Diagnosis Of The Sd (Shutdown) - Pioneer PDP-5016HD Service Manual

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5

5.2.3 BLOCK DIAGRAM OF THE SHUTDOWN SIGNAL

QQ
3 7 63 1515 0
• Check LED flashes on
INTERFACE Assy
LED
Green
Red
INTERFACE Assy
(AWV2373)
TE
L 13942296513

5.2.4 DIAGNOSIS OF THE SD (SHUTDOWN)

Prediction of failure symptoms when a SD (Shutdown) generated
LED Flashing
SD Circuit
Count
(Interface Assy)
Green 1
Sequence
processor NG
IIC communication
Green 2
failure of the module
microcomputer
Power decrease of
Green 3
DIGITAL DCDC
www
Green 4
Panel having higher
.
temperature
(TEMP1)
5
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6
DIGITAL Assy
TXD_SQ
RXD_SQ
CLK_SQ
CE_SQ
BUSY_SQ
microcomputer
SD_TRIGGER
Note: The figure number shows the LED blinking times if Shutdown.
Subcategory
Communication failure
Sequence stop
Busy
Version error
DIGITAL Assy EEPROM
PANEL SENSOR EEPROM
DAC
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2 9
8
1
1
IC3301
IC3401
Flash
SQ IC
ROM
3
3
IC3303
1
1
OR
RST2
2
2
SCL
SDA
IC3151
Module
EEPROM
2
2
E_SCL
E_SDA
TEMP1
4
4
Q Q
3
6 7
1 3
1 5
SQ-IC
RTRY
SQNO
BUSY
VER-HS
MD-IIC
EEPROM
BACKUP
DAC
-
RST2
co
TMP_NG
TEMP1
.
PDP-5016HD
7
9 4
2 8
IC3302
3.3V
RST
Normal operation
IC3304
Stanby ; Red
1.2V
Power ON; Green
RST
IC3157
DAC
IC3156
SENSOR Assy
IC3651
IC3652
Temp.
Backup
sensor
EEPROM
0 5
8
2 9
9 4
2 8
Point to be Checked
(Possible defective part)
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)
DCDC converter output voltage
(AXY1137-)
m
V+12V voltage
(Power supply Assy)
Surrounding temperature
Abnormality of temperature sensor
(AWW1140: (IC3901))
7
8
9 9
A
B
C
9 9
D
E
F
153
8

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