Diagnosis - Pioneer PRO-141FD Service Manual

1

5. DIAGNOSIS

5.1 POWER SUPPLY OPERATION
A
[1] LED DISPLAY INFORMATION
LED Pattern
Status
Power OFF
Red and blue LEDs
(Indicator OFF) unlit
Power ON
Blue LED lit
(Indicator ON)
B
Standby Red LED lit
The blue LED flashes
Power Management
at intervals of 1000 ms.
The red LED flashes at intervals
of 500 ms one to n times *1
PD (Power-Down)
then goes dark and remains
unlit for 2500 ms.
The blue LED flashes at
intervals of 500 ms one to n
SD (ShutDown)
times *2 then goes dark and
remains unlit for 2500 ms.
The red LED lights, and
No backup copying
the blue LED flashes at
(panel)
intervals of 200 ms.
C
The red and blue LEDs flash
Panel aging in progress
alternately at intervals of 300
(Not for servicing.
ms twice then go dark and
Only for factory use)
remain unlit for 900 ms.
During main micro-
The red and blue LEDs
computer rewriting
flash alternately at intervals
(during MAI)
of 100 ms.
During MD micro- The red and blue LEDs
computer rewriting flash alternately at intervals
(during MOD) of 100 ms.
The red and blue LEDs
During ZEUS rewriting
flash alternately at intervals
(during PNL)
of 100 ms.
The red and blue LEDs
During ARIA rewriting
flash alternately at intervals
(during WID)
of 100 ms.
D
The red and blue LEDs
During IP micro-
flash alternately at intervals
computer rewriting
of 100 ms.
*1 Refer to the "5.3 Diagnosis of PD (Power-Down)" sheet for the number of times of flashing during power-down.
*2 Refer to the "5.4 Diagnosis of SD (ShutDown)" sheet for the number of times of flashing during shutdown.
Basic operation
• The priority of LED indication when several abnormalities were detected simultaneously is shown below:
Priority is given to power-down over shutdown.
Number of times an LED flashes: Priority is given to a lower over a higher number of times to flash.
• Timing of writing data on SD or PD on the EEPROM
Immediately after an abnormality is generated. Only the data on the latest abnormality will be stored
E
(data on the previous abnormality are erased).
• When a power-down or shutdown is invoked, the unit will shut itself off several seconds later.
If another abnormality is detected during that standby period, priority is given to the process of turning off the unit sooner.
Priority
1 PD
2 SD
3 Forcible control of LEDs during FAY
4 Execution of ZAC command
5 No backup copying
F
6 Rewriting of microcomputer programs
7 Normal operation (ON/STB/sleep, etc.)
44
1
2
LED Display Pattern
Red
Blue
Red
Blue
Red
Blue
Red
1000ms 1000ms
Blue
Red
500ms 500ms
(Once)
Blue
Red
(Once)
500ms 500ms
Blue
Red
200ms
Blue
Red
300ms
300ms
Blue
Red
100ms
100ms
Blue
Red
100ms
100ms
Blue
Red
100ms
100ms
Blue
Red
100ms
100ms
Blue
Red
100ms
100ms
Blue
PRO-141FD
2
3
2500ms
(n times)
(n times) 2500ms
900ms
3
4
Remarks
2500ms
Execution of ZAC
(n times)
command
4