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SECTION 4
TEST MODE
CD SECTION
1. Entering CD test mode
With the OPERATE button OFF, short JW801 and JW802 on
the LCD board. (You need a moment for the short.)
The LCD display changes as in the diagram and the unit goes
into test mode.
When you press the
^
key, the CD rotates and when you press
the
^
key again, the CD plays (the track servo comes on)(but
no sound is issued).
Pressing the
^
key starts automatic adjustment and the value
changes, but this value is not a problem.
[LCD BOARD] (Conductor side)
2. Exiting test mode
With the unit in test mode, when you press the OPERATE but-
ton to OFF, test mode ends.
3. RF LEVEL and jitter check
Test mode PLAY status
Connection P oint : CD/System board (Conductor side)
Check to see that the jitter is less than 9.0 nsec. and RF level is
between 0.55 – 0.85Vp-p.
Í
ALL
SOUND
MEGA BASS
cd
RF level:
0.55–0.85 Vp-p
VOLT/DIV : 200mV (using 10:1 probe)
TIME/DIV : 500ns
oscilloscope
(AC range)
TP (RFO)
TP (VC)
CD TEST MODE
SHORT : TEST MODE
OPEN : NORMAL MODE
Содержание ZS-D50 Operating Instructions (primary manual)
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