Pioneer MJ-D508 Service Manual page 48

MJ-D508
8
Jitter/C1 Error Check at the time of Recording/Playback
Step No. Operation Keys and Operation Method
1 Power ON while holding the ENTER key and the
PLAY key depressed.
2 Insert the test disc (GGF1277).
Perform " 5 Normal Adjustment " (step 3, step 4).
3
4 Press the NAME CLIP key twice.
5 Press the NAME key and display the inner
circumference address.
6 When the PLAY key is pressed, TEST REC starts,
and when 25 addresses or more have been sent,
stop by pressing the STOP key.
7 Press the NAME key and display the inner
circumference address.
8 Press the NAME CLIP key and display the
intermediate circumference.
9 Perform step 6.
10 Press the NAME key and display the inner
circumference address.
11 Press the NAME CLIP key twice and display the
outer circumference address.
12 Perform step 6.
13 Press the NAME CLIP key.
Perform steps 5 to 13 of " 7 Jitter/C1 Error Check
14
at the time of Playback ".
At the time of self-recording, wait for seven
addresses after TEST PLAY start, and then press
the REC key and enter into mean value mode.
(Good recording may not be possible for several
addresses at the beginning.)
15 Press the EJECT key.
16 Power OFF
Jitter Meter
LEVEL
GND
48
CORE MAIN UNIT ASSY
JITTER
REFO
Connection diagram
FL Display
EJECT Test mode
LOADING
GRT AJST
AUTO AJST
TEST REC TEST REC mode
a0050 pw0D
a0069 pw0D
Note: When the initial address (0050) part of
TEST REC
the inner circumference (or intermediate/
outer circumference) has been used 1000
times or more, press the CUE key and
a0050 pw0D
shift the address by 10hex. (The address
is shifted (up to 10 times) according to the
a03C0 pw0D
use frequency of the disc.)
a03D9 pw0D
TEST REC
a0050 pw0D
a0700 pw0D
a0719 pw0D
TEST REC
TEST PLAY TEST PLAY mode
a0069 c0009 Check the jitter/C2 error at the inner/
a03D9 c0007 intermediate/outer circumference of GGF1277,
a0719 c0006 and check that the jitter value satisfies the
standard value of the following table.
GGF1277 jitter value
Inner circumference
Intermediate circumference 31 nsec or less
Outer circumference
EJECT The test disc (GGF1277) is ejected.
Test mode is ended.
SIDE A
EFM MON
Status Remarks
Intermediate
circumference
33 nsec or less
31 nsec or less
and
outer
may be
omitted.