Panasonic RXDT630 - Troubleshooting Guide

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TROUBLESHOOTING
GUIDE
No CO playback
Does the test
disc rotate?
NO
YES
Check if TOC
reading is performed.
NO
Does “>" appear
on the display?
No access
Below 700 mV
| or no output
Playing time appear on the display
At 1 Vp-
Check
output
about
1
Vp-p
pin® @ @ of
1C702.
@ BCLK
@ LRCK
@ SRDATA
Is pin 68 of IC702
at “HIGH” or “LOW"?
(CLVS)
OK
Is pin 6)
of CN702 at “HIGH”
or "LOW"?
Check output
pin @) @3 of
CN702.
Is there an output
at pin @6 of |IC702?
IC702 failure} | he the 1C702 failure OK
R726 failure IC702 failure
No signal a ae
No waveform or upper and
(ma lower amplitudes are
not equal
Check pin @§)
of 1C701.
(FE)
Optical
pickup
.
Upper and lower
amplitudes of
waveform are equal
RX-DT630 RX-DT630
Remove the test disc
Turn on open and close
switch (S790)
Does optical pickup ~_NO
move?
Optical pickup moves toward
inner track once, and then toward
outer track slightly (2 or 3 mm).
Does lens make
NO
vertical movements?
YES
Does laser diode NO
come on?
YES.
Loadthe —
test disc
Remains at
te KH"
Check pin (8 of
IC701
(REDET) Above 0.6 V
Charges from
“H™ or“,
Remains at
“hye Check pin (9 of
CN702
(FLOCK)
Changes from
“AH” or “L".
1C702 failure IC703 failure
defective.
Measure voltage
across R701.
Above 0.4 V
Optical pickup OK OK
failure .
Check the position At outer or around middie track
of optical pickup.
At inner track
Is pin @) of CN702
at “HIGH” or “LOW"?
Is pin @ of CN702 at
“HIGH” or “LOW"2
Are there outputs
at pins @) and @2 of
IC703?
NG
“L" (0 V)
OK
inner acs His Inner track limit switch
Optical
pickup
switch
is
defective
ig
ahoricicuied:
Below0.4Vv
|
failure
or
disconnected
NG Is there an output NG Are there outputs
at pin @ of 1C702? pins @ and © of
IC703?
Traverse deck
failure
IC 702 failure IC 703 failure
Measure voltage
between © and © |
of Q701.
ls there an output
at pin @) of IC702?
Below 0.6 V | NG
OK
IC702 failure 1C703 failure
IC701 failure