Troubleshooting - Onkyo DX-710 Service Manual

pan Lo-
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TROUBLESHOOTING GUIDE
Does the Q106: Loading driver
tray close ?
is approx. +4.0V)
Yes
Does the
tray open for some
No
Does the No
pickup to
inner ?
Yes
No
Does the laser
light on ?
Yes
More than approx. 1.7V
Is the voltage
of both sides of R103 when
pickup lights on
correct ?
%* CAUTION 1
Less than approx. 1.7V
No Does the triangle
waveform output from
pin 7 of Q105 ?
Does the object
lens move to up and
down sides ?
Yes
Yes P101, QF101
Focus coil open
QF101 :120V model is not used.
No Optical pickup-
Q104, Q109
Does the object lens
move to up and down sides
smoothly ?
Focus servo circuit
Yes
Does the disc No Does #39 of
start to turn Q104 turn at the high
clockwise ? level ?
Does terminal
MON turn at the high
level ?
Yes Yes
Spindle motor, Q106,
and Spindle motor
servo circuit.
GFS= #42 of Q109
Does terminal No
GFS turn
the high level ?
Yes
Higher speed or Lower speed.
Does the pickup
return to inner ?
No
Mechanism
Yes
Jitter trouble
Q109 (microprocessor)
Q108 (CXD2500AQ)
Q109, #50 & #51 (Open & Close ports)
(Operate when the voltage between #1 and #2 of P104
Yes [Tray IN/OUT switch a
time ? The breaking of wire of the socket P104.
Does the
pin 20 of Q101 turn
at the low level?
tracking OK ?
Is the Voltage
of Q104 #37 approx.
Is the rotation
of disc correct ?
Slide mechanism
trouble
No
Is the movement
of slide mechanism
smoothly ?
Yes
The breaking of wire of socket P103.
Slide motor cifcuit Q104. Q105
No
Yes
Optical pickup APC circuit
trouble Optical pickup
%* CAUTION 1
Turn the power switch to OFF.
Connect the DC voltmeter across the carbon resistor R103.
Turn the power switch to ON.
1. Put the disc into the tray.
2. Set the semi-fixed resistor R116 of focusing gain
to the minumum position.
3. Connect the oscilloscope to #1 of P107.
4. Do the operation of focusing search.
(Repeat the power switch to ON and OFF.)
Test point QF102
Range :0.5s/Div. 0.5V/Div.
No
Check the curve S.
Optical pickup
No
Test point #1 of P107
Range :2ms/Div. 1V/Div.
No: Repeat the low and high level.
Is #5 of
P105 high ?
Is the curve S correct ?
Optical pickup
Focus servo circuit
Yes : Hold the high level than 1 sec..
Tracking circuit
Tracking adjustment miss
Optical pickup
No Yes
Is the Is the greating OK ?
Yes No
No [14,0106] | Optical pickup
Q107 Slide mechanism
Confirmation of grating
Optical pickup
2.5V ?
When the shift of grating
Normal speed
Focus offset jitter trouble
Q105 (CXD2500AQ)