Pioneer CDJ-850 Service Manual page 25

5
[2-3] The LED does not light.
No. Cause Diagnostics Point
1 Signal errors DFLB Assy
2 Defective parts DFLB Assy
[3] Operations (Keys/variable controls/JOG)
As operations of all keys, variable controls, and JOG dial can be checked in Service mode.
[3-1] No key functions
PLAY, CUE, AUTO BEAT LOOP 1-4, BEAT SELECT, REV, LOOP IN/OUT, RELOOP, or USB STOP key does not function.
No. Cause Diagnostics Point
Loose connection
1 Related point
/Defective SW
Defective PANEL
2 DFLB Assy
CPU (IC1007)
The signals from other keys are analog and connected to multiple switches.
No. Cause Diagnostics Point
Loose connection
1 Related point
/Defective SW
Defective PANEL
2 DFLB Assy
CPU (IC1007)
[3-2] Rotary selector not controllable
No. Cause Diagnostics Point
Defective rotary
1 DFLB Assy
selector
Defective PANEL
2 DFLB Assy
CPU (IC1007)
[3-3] Variable controls not controllable
Tempo slider not controllable
No. Cause Diagnostics Point
DFLB Assy
Loose
1
SLD1 Assy
connection
SLD2 Assy
Defective tempo DFLB Assy
2
SLD2 Assy
slider
Defective PANEL
3 DFLB Assy
CPU (IC1007)
VINYL SPEED ADJUST not controllable
No. Cause Diagnostics Point
Loose DFLB Assy
1
connection SLD1 Assy
Defective
DFLB Assy
variable
2
SLD1 Assy
controls
Defective PANEL
3 DFLB Assy
CPU (IC1007)
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6
Item to be Checked
Check that the control signal for the LED
is output from the PANEL CPU (IC1007).
Check that the voltage (2.2 V) is present
at both ends of the LED.
Item to be Checked
Check if there is loose connection on the
signal line from the PANEL CPU (IC1007)
up to the SW.
If the symptom persists after the above
corrections,
Item to be Checked
Check if there is loose connection on the
signal line from the PANEL CPU (IC1007)
up to the SW.
If the symptom persists after the above
corrections,
Item to be Checked
Check if the signals from the RENC_1, RENC
_2, and RENC_SW signal lines are normal
when the rotary selector is turned or pressed.
If the symptom persists after the above
corrections,
Item to be Checked
Check if there is loose connection on the
signal line from the PANEL CPU (IC1007)
to the tempo slider (VR1501).
Check the ADCT and ADIN signals level.
If the symptom persists after the above
corrections,
Item to be Checked
Check if there is loose connection on the
signal line from the PANEL CPU (IC1007) to
the VINYL SPEED ADJUST VR (VR1301).
Check the TCH/REL signal level.
If the symptom persists after the above
corrections,
CDJ-850
6
7
Corrective Action
If no signal is output, check a mounting state of
PANEL CPU(IC1007). If the mounting is OK, the
IC1007 may be defective.
If the voltage is abnormal, the LED, transistor or
peripheral resistors may be defective.
Corrective Action
If there is no loose connection and if the signal does
not become "L" when the SW is pressed, that SW is
defective.
Check a mounting state of PANEL CPU (IC1007).
If the mounting is OK, the IC1007 may be defective.
Corrective Action
If the SWs connected to the signal line function
properly and if the connections are properly made,
the SWs may be defective.
Check a mounting state of PANEL CPU (IC1007).
If the mounting is OK, the IC1007 may be defective.
Corrective Action
If the signals are not normal, check the connections of
the signal lines. If the connections are properly made,
the Rotary selector (S1018) may be defective. Replace it.
Check a mounting state of PANEL CPU (IC1007).
If the mounting is OK, the IC1007 may be defective.
Corrective Action
If the connections of signal line are improper,
resolder it.
If the voltage of the ADCT signal (IC1007-pin 1) is not
1.65 V, or the voltage of the ADIN signal (IC1007-pin 2)
does not change between 3.3 V and 0 V, the Tempo
slider (VR1501) may be defective.
Check a mounting state of PANEL CPU (IC1007).
If the mounting is OK, the IC1007 may be defective.
Corrective Action
If the connections of signal line are improper,
resolder it.
If the voltage of the TCH/REL signal line (IC1007-pin 88)
does not change between 3.3 V and 0 V, the VINYL
SPEED ADJUST VR (VR1301) may be defective.
Check a mounting state of PANEL CPU (IC1007).
If the mounting is OK, the IC1007 may be defective.
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8
A
Reference
[10] Basic operation
check of CPU/DSP
—
B
Reference
10.15 EACH
SIGNAL LEVEL
[10] Basic operation
check of CPU/DSP
Reference
C
—
[10] Basic operation
check of CPU/DSP
Reference
10.15 EACH
SIGNAL LEVEL
[10] Basic operation D
check of CPU/DSP
Reference
—
10.15 EACH
SIGNAL LEVEL
C D
E
[10] Basic operation
check of CPU/DSP
Reference
—
10.15 EACH
SIGNAL LEVEL
E
[10] Basic operation
F
check of CPU/DSP
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