Pioneer MJ-L5 Service Manual page 57

Jitter/C1 Error Check at the time of Recording/Playback
Step No. Operation Keys and Operation Method
1 Short circuit MECH TEST MODE during the power
ON, or press the ESC key.
(Service remote control unit)(Fig.1)
2 Insert the test disc (GGF1277).
3 Perform " Normal Adjustment " (step 3, step 4).
4 Press the REC key twice.
5 Press the SET (for Remote control unit) 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 SET (for Remote control unit) key and
display the inner circumference address.
8 Press the REC key and display the
intermediate circumference.
9 Perform step 6.
10 Press the SET (for Remote control unit) key and
display the inner circumference address.
11 Press the REC key twice and display the
outer circumference address.
12 Perform step 6.
13 Press the REC key.
14 Perform steps 5 to 13 of "
at the time of Playback ".
At the time of self-recording, wait for seven
addresses after TEST PLAY start, and then press
the CANCEL key (Remote control unit) 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
Jitter/C1 Error Check
MD CORE MAIN UNIT
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 F.SKIP 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
MJ-L5, SP-L5
Status Remarks
Intermediate
circumference
33 nsec or less
31 nsec or less
and
outer
may be
omitted.
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