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– 17 –
z
RF LEVEL and jitter check
Test mode PLAY status
Connection Point : CD board (Conductor side)
Check to see that the jitter is less than 9.0 nsec. and RF level is
between 0.7 – 1.1Vp-p.
SECTION 4
TEST MODE
CD SECTION
1. Entering CD test mode
Connect power supply cord or insert dry batteries, short Test
point (TEST-1) on the key board. (You need a moment for the
short) (Power button is possible with both of ON or OFF to en-
ter test mode).
The LCD display changes as in the diagram and the unit goes
into test mode.
When you press the
u
key, the CD rotates and when you press
the
u
key again, the CD plays (the track servo comes on) (but
no sound is issued).
Pressing the
u
key starts automatic adjustment and the value
changes, but ignore this value.
[KEY BOARD] (Conductor side)
h
PGM
MEGA BASS
cd
RF level:
0.7–1.1 Vp-p
VOLT/DIV : 200mV (using 10:1 probe)
TIME/DIV : 500ns
E C B
JW610
JW606
D603
D602
R60
7
R606
R605
R604
R603
R602
Q603
S618
JW609
CN806
BAND
x
x
11
(11)
1-678-260-
TEST-1
1
4
TEST-1
SHORT : TEST MODE
OPEN : NORMAL MODE
TP(RF)
IC701
oscilloscope
(AC range)
TP (RF)
JW741
(VC)
[CD BOARD]
(Conductor side)
2. Exiting test mode
With the unit in test mode, when you press the POWER button
to OFF, power is off and test mode ends.