Pioneer CDJ-850 Service Manual page 24

1
A
[1-2] Mode shift error in Standby mode
Shifting to the STANDBY mode cannot be performed even if turn the power off.
No. Cause Diagnostics Point
DFLB Assy
Path failure of
1
SLD1 Assy
the power switch
PSWB Assy
Path failure of DFLB Assy
2
the power on CMPX Assy
B [1-3] "E-8709" is displayed on the DATA FL display after startup.
Communication between the Main CPU and Panel CPU has not been established.
No. Cause Diagnostics Point
Communication
DFLB Assy
failure between
1
MAIN Assy
the microcomputer
2 Power failure MAIN Assy
[1-4] The Standby LED flashes in red.
C
No. Cause Diagnostics Point
A voltage error
1
was generated.
[2] Display (DATA FL/JOG FL/LED)
[2-1] The DATA FL does not light.
No. Cause Diagnostics Point
D
1 Power failure DFLB Assy
2 Signal errors DFLB Assy
[2-2] The JOG FL does not light.
No. Cause Diagnostics Point
E
1 Power failure JFLB Assy
2 Signal errors JFLB Assy
F
24
1
2
Item to be Checked
Check if there is loose connection on the
signal line from the Power switch (S1601)
to PANEL CPU (IC1007).
Check the level of PWR_ON (IC1007-pin
45) and PWR_XON (CN2001-pin 3) signals.
Item to be Checked
Check the TSCK, TSI, PNL_BUSY, TSO and
MAIN_BUSY waveforms.
Check the V+3R3 and V+1R2 power
voltages.
Item to be Checked
— Check the level of the VDET signal.
Item to be Checked
Check the power-supply voltages
(V+6R6,F±, V+38, V+3R3_SW) of the FL.
Check the waveforms and connection of
communication line of FL in the DFLB Assy.
• D_SCLK
• D_SO
• D_LAT
• D_BK
Item to be Checked
Check the power-supply voltages
(VFDP2R7_F1, VFDP2R7_F2, V+27,
V+3R3_SW) of the FL.
Check the waveforms and connection of
communication line of FL in the JFLB Assy.
• J_SCLK
• J_SO
• J_LAT
• J_BK
2
3
Corrective Action
If the connection up to the Power switch is properly
made and if the PWR_SW signal is not set to "H"
when the Power switch is turned off, the Power switch
may be defective.
If the PWR_ON is "H", PANEL CPU(IC1007) may be
defective.
If the PWR_XON is "L", poor connection or Q2021
may be defective.
Corrective Action
If no signal is output, the possible causes are poor
connection, failure in the PANEL CPU (IC1007) or
MAIN CPU (IC103), and startup failure of the
MAIN CPU caused by defective FLASH ROM
(IC101) or SDRAM (IC102).
If power is not output, a part of the power supply
section may be defective.
Corrective Action
If the signal level is "L", a voltage error was
generated.
Corrective Action
If the presence of power is not confirmed, check the
mounting statuses of the regulator IC and its
peripheral parts for each power supply. If they are
properly mounted, then the parts may be defective.
If no signal is output, the PANEL CPU (IC1007) may
be defective.
If output signal is no problem, DATA FL (V1001) may
be defective.
Corrective Action
If the presence of power is not confirmed, check the
mounting statuses of the regulator IC and its
peripheral parts for each power supply. If they are
properly mounted, then the parts may be defective.
If no signal is output, the PANEL CPU (IC1007) may
be defective.
If output signal is no problem, JOG FL (V1801) may
be defective.
CDJ-850
3
4
Reference
10.15 EACH
SIGNAL LEVEL
A
10.15 EACH
SIGNAL LEVEL
B J
Reference
10.14
WAVEFORMS
8 9 7 10
4
10.13 VOLTAGES
9 10
Reference
5.5 ABOUT POWER
SUPPLY MONITORING
10.13 VOLTAGES
Reference
4.3 POWER SUPPLY
BLOCK DIAGRAM
10.13 VOLTAGES
20 21 23 19
10.14
WAVEFORMS
1 4 3 2
Reference
4.3 POWER SUPPLY
BLOCK DIAGRAM
10.13 VOLTAGES
24 25 22 19
10.14
WAVEFORMS
1 4 3 2
4