Pioneer CDJ-850 Service Manual page 30

1
A
No tracking close
No. Cause Diagnostics Point
1 Defective pickup MAIN Assy
2 Power failure MAIN Assy
TM Assy-S
3 —
(Traverse mecha)
B
[9] Error Codes
How to respond when an error code is displayed on the FL DISPLAY is described below.
[9-1] E-6002: COMMUNICATION ERROR
The MAIN CPU cannot write in a program to the AUDIO DSP at start-up.
No. Cause Diagnostics Point
1 Power failure MAIN Assy
2 Defective part MAIN Assy
C
[9-2] E-7201: TOC READ ERROR
TOC data cannot be read from a disc.
No. Cause Diagnostics Point
TM Assy-S
—
1
(Traverse mecha)
[9-3] E-8709: COMMUNICATION ERROR
D
Communication between the PANEL CPU (IC1007) and MAIN CPU (IC103) is not possible.
No. Cause Diagnostics Point
DFLB Assy
—
1
MAIN Assy
E
F
30
1
2
Item to be Checked
Check the LD current and measure the
resistance value of the actuator.
Check the power voltages.
(V+7R6_M, V+5R6_M, VREF1R65,
V+3R3_S)
Check that focusing is in. (If focusing is out,
tracking close is not possible.)
Item to be Checked
Check the power voltages for Audio DSP.
(V+3R3_A, V+1R25)
Check if the AUDIO DSP (IC301) is
operating.
Item to be Checked
Measure the error rate in Player Operation
mode of Service mode in order to distinguish
whether the cause is attributable to the disc
or to the player. For measurement, play back
the reading point at which reading resulted in
an error, by listening to the sound.
Item to be Checked
Check the waveforms of TSCK, TSI,
PNL_BUSY, TSO, and MAIN_BUSY,
check the voltages of V+3R3 and V+1R2.
CDJ-850
2
3
Corrective Action
Refer to the "5.3 Diagnosis of the Pickup Assy."
For any power-supply section that does not output
the voltage, check the mounting statuses of the
regulator IC and its peripheral parts. If they are
properly mounted, then the parts may be defective.
See "In-focus not possible" above.
Corrective Action
If the voltage level is abnormal, IC402 or IC403
may be defective.
If the AUDIO DSP (IC301) is not operating, AUDIO
DSP (IC301) and its peripheral parts may be defective.
If the AUDIO DSP (IC301) is operating, the MAIN
CPU (IC103) and its peripheral parts may be defective.
Corrective Action
See [8] SERVICE MODE for details.
Corrective Action
See "[1-3] "E-8709" is displayed on the DATA FL
display after startup" for details.
3
4
Reference
5.3 Diagnosis of
the Pickup Assy
4.3 POWER SUPPLY
BLOCK DIAGRAM
—
Reference
10.13 VOLTAGES
11 12
[10] Basic operation
check of CPU/DSP
Reference
[8] SERVICE
MODE
Reference
[1-3] "E-8709" is
displayed on the
DATA FL display
after startup
4