Pioneer DJM-850-K, Руководство по обслуживанию

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21
DJM-850-K
5 6 7 8
5 6 7 8
A
B
C
D
E
F
1-4
1-4
1-4
6 20 MHz CLK
error MAI N Assy
R2 8 04
Check for the 20M_CLK signal.
This is a simple check of whether a signal
is output or not. A normal waveform
cannot be observed, because the drive
circuit is inside the IC. • If an output signal can be confirmed, go to [ 8 ].
• If an output signal cannot be confirmed, the
crystal
(X2 8 01) block or MAI N UCOM (IC2 8 03)
may be defective.
Check for the status of soldering and replace it.
10.35 W A V EFORMS
5-2
7 Power failure,
defective parts,
W ire defect
PRIMARY Assy
JP3001 pin 3 Check for the V +11E_U N REG power
on PRIMARY Assy.
• If the V +11E_U N REG power can be confirmed,
JP3001 may be defective. Replace it.
• If the
V +11E_U N REG power cannot be
confirmed, the PRIMARY Assy may be
defective. Replace it.
4.4 PO W ER
BLOCK DIAGRAM
5.3 I
N FORMATIO N
O N PO W ER
DIAG N OSTICS
8 MAI N UCOM
defective
MAI N Assy
IC2 8 03
If the symptom persists after the above
corrections. The MAI N UCOM (IC2 8 03) may be defective.
Replace it.
—————
2 MAI N UCOM
defective
MAI N Assy
IC2 8 03
If the symptom persists after the above
corrections. The MAI N UCOM (IC2 8 03) may be defective.
Replace it.
—————
4 Defective parts MAI N Assy
IC3007
IC2
8 02
If the symptom persists after the above
corrections. The FPGA (IC3007) or FLASH (IC2 8 02) may
be defective. Replace it.
—————
[1-2] The unit dose not turn on, and the LED of the SETUP LED flashes four times.
1 20 MHz CLK
error MAI N Assy
R2 8 04
Check for the 20M_CLK signal.
This is a simple check of whether a signal
is output or not. A normal waveform
cannot be observed, because the drive
circuit is inside the IC. • If an output signal can be confirmed, go to [2].
• If an output signal cannot be confirmed, the
crystal
(X2 8 01) block may be defective.
Check for the status of soldering and replace it.
10.35 W A V EFORMS
MAI N UCOM (IC2 8 03) startup error may be suspected.
1-4
[1-3] The unit dose not turn on, and the LED of the SETUP LED flashes two times.
1 Power failure,
defective parts MAI N Assy
R3037
F3001
• Check for the V +3R3D_FPGA power.
• Check for the V +1R2D_FPGA power.
• If the V +3R3D_FPGA power and
V +1R2D_FPGA power can be confirmed,
go to [2].
• If either power cannot be confirmed, the power
line may be defective.
Check for the status of soldering and replace it.
4.4 PO W ER
BLOCK DIAGRAM
5.3 I
N FORMATIO N
O N PO W ER
DIAG N OSTICS
Communication error between the MAI N UCOM (IC2 8 03) and FPGA (IC3007)
1-5
1-6
2 RESET signal
error MAI N Assy
R3097
Check that the signal level of
FPGA_RESET is High. • If the signal level is High, go to [3].
• If the signal level is low, something on the
FPGA_RESET path may be wrong.
Check for the status of soldering and replace it. —————
1-7
1- 8
3 24MCLK
error MAI N Assy
R3070
Check for the 24M_CLK_FPGA signal. • If an output signal can be confirmed, go to [4].
• If an output signal cannot be confirmed, the
24MCLK (IC3204) block may be defective.
Check for the status of soldering and replace it. 10.35 W A V EFORMS
1- 8
3-3
3 20 MHz CLK
error P N LA Assy
R6624
Check for the 20M_CLK signal.
This is a simple check of whether a signal
is output or not. A normal waveform
cannot be observed, because the drive
circuit is inside the IC. • If the signal can be confirmed, go to [4].
• If an signal cannot be confirmed, crystal
(X6601) block or SUB UCOM (IC6601) may
be
defective.
Check for the status of soldering and replace it.
10.35 W A V EFORMS
3-3
4 SUB UCOM
defective P N LA Assy
IC6601
If the symptom persists after the above
corrections. SUB UCOM (IC6601) may be defective.
Replace it. —————
[1-4] The unit dose not turn on, and the LED of the SETUP LED flashes five times.
1 Power failure,
defective parts P N LA Assy
R6615
Check for the V +3R3D_PA power. • If the V +3R3D_PA power can be confirmed,
go to [2].
• If an
V +3R3D_PA power cannot be confirmed,
the power line may be defective.
Check for the status of soldering and replace it.
4.4 PO W ER
BLOCK DIAGRAM
5.3 I
N FORMATIO N
O N PO W ER
DIAG N OSTICS
Communication error between the MAI N UCOM (IC2 8 03) and SUB UCOM (IC6601)
3-1
2 RESET signal
error P N LA Assy
IC6601 pin 90
Check that the signal level of
SUB_CPU_RESET is High. • If the signal level is High, go to [3].
• If the signal level is low, the path inside the
MAI
N Assy may be wrong.
Check for the status of soldering and replace it.
—————
3-2
No. Cause Diagnostics Point Item to be Checked Corrective Action Reference
No. Cause Diagnostics Point Item to be Checked Corrective Action Reference
No. Cause Diagnostics Point Item to be Checked Corrective Action Reference
No. Cause Diagnostics Point Item to be Checked Corrective Action Reference