Pioneer CDJ-850, Руководство по обслуживанию

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2 8
CDJ- 8 50
1 2 3 4
A
B
C
D
E
F
1 2 3 4
[7] DRIVE ASSY
[7-1] Improper operation of the loading mechanism
1
Loose
connections
Cables
MAI N Assy
JI N T Assy
SLMB Assy
Check the connection of the motor-drive signal
line LO±. Check that the wires between the
loading motor (DC motor) and the SLMB Assy
are securely soldered. Check also the wires
are not broken.
If soldering is improper, resolder it.
If the wires are broken, replace them.
2 Signal errors
MAI N Assy
JI N T Assy
SLMB Assy
Check the connections and waveforms of the
LPS1 and LPS2 signal lines. In the normal state,
the LPS1 and LPS2 signals becomes "L" when
the loading detection SWs(S1701 and S1702)
are set to O
N .
If the signal waveform is not proper, loose connection
and the loading detection SWs (S1701 and S1702)
may be improperly soldered or defective.
4.3 POWER SUPPLY
BLOCK DIAGRAM
3 Power failure MAI N Assy
Check the power voltages.
V +7R6_M, V +5R6_M, V REF1R65,
V +3R3_B, V +3R3, V +1R2A
For any power-supply section that does not output
the voltage, check the mounting statuses of the
regulator IC and its peripheral parts.
—
N o loading (There is an abnormal noise.)
1
Improper
assembling
Slotin Mecha
Assy
SLMB Assy
Check if the SW lever has shifted on the
loading detection SWs (S1701 and S1702)
on the SLMB Assy.
If assembling is improper, resolder it.
2
Loose
connections
Signal errors
MAI N Assy
JI N T Assy
SLMB Assy
Check the waveforms on the LPS1 and
LPS2 signal lines.
If the signal waveform is not proper, loose connection
and the loading detection SWs (S1701 and S1702)
may be improperly soldered or defective.
[7-2] The stepper does not work.
3 Power failure MAI N Assy
Check the power voltages.
V +7R6_M, V +5R6_M, V REF1R65,
V +3R3_B, V +3R3, V +1R2A
For any power-supply section that does not output
the voltage, check the mounting statuses of the
regulator IC and its peripheral parts. Replace it.
4.3 POWER SUPPLY
BLOCK DIAGRAM
2 Signal errors MAI N Assy
Check the waveform of I N SW (I N SIDE)
signal. In the normal state,The I N SIDE SW of
TM Assy-S (Traverse mecha) becomes "L"
when the I
N SIDE SW is set to O N .
If the signal is not proper, check the connections.
If connections are properly made, replace the
TM Assy-S (traverse mecha).
[7-3] No CD playback
2
Any foreign
matter attached TM Assy-S
(Traverse mecha)
Check if any foreign matter, such as
shavings, dirt, or dust, is attached to the
lens of the Pickup Assy.
Clean a lens.
3 Defective pickup MAI N Assy
Check the LD current value.
Measure the actuator resistance value.
Refer to the “5.3 Diagnosis of the Pickup Assy.”
5.3 Diagnosis of
the Pickup Assy
4 — Service mode
If the symptom persists after the above
corrections, check operations of the CD
drive in Service mode.
Check operations of the CD drive, referring to the
procedures described in “6. SER
V ICE MODE.”
If the CD drive functions improperly,
see “[8] SER
V ICE MODE” in this section.
6. Service mode
—
1
Loose
connections
MAI N Assy
JI N T Assy
Check the connection of the stepping-motor
drive signal line ST1± and ST2±.
If connection is improper, resolder it. —
—
1 Short switch C N CT Assy
Short switch S2501 is in the off (open)
state.
In the normal operation, turn the short switch to
off (open).
—
10.14
WA
V EFORMS
10.14
WA
V EFORMS
10.15 EACH
SIG
N AL LE V EL
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
O
11 12
11 12