IC202
IC101
Q1
RF
TE
FE
JW103
JW102
CD
C.B (PATTERN SIDE)
Vref
4
11
①②③
⑤
①②
③
Perform the adjustments after the main unit enters the test mode.
Equipment and tools required
Measuring equipment
Digital multi-meter
Jitter meter (KIKUSUI 6235)
Test disc: TCD-782
1.RF WAVEFORM CHECK
1) Connect oscilloscope to the test point RF and Vref.
2) Play back the 2
nd
track of TCD-782.
3) Check that the RF waveform has the maximum amplitude and the center
of the wedge waveform has the clear blank.
2.JITTER CHECK
1) While oscilloscope is kept connected in the same test point as in
step2. RF WAVEFORM CHECK, connect the output terminal of
an oscilloscope to the input terminal of the jitter meter.
2) Set the VOLT range selector of oscilloscope to 500mV range or
below.
3) Play back 2
nd
track of TCD-782.
4) Check that jitter meter indicates 28.0ns or less.
OUTPUT
ns
OSCILLOSCOPE
JITTER METER
INPUT
RF
Vref
OUTPUT
OSCILLOSCOPE
RF
Vref
VOLT / DIV: 500mV
TIME / DIV: 0.2
µ
s
EYE PATTERN
must be CLEAR and MAX
Approx.
1.8
±
0.3V
p.p
–
55
–
< CD SECTION >
CD CHECK
Place the CD mechanism on level ground.
ATD-001
R8A
Summary of Contents for XR-EM50
Page 31: ... 31 SCHEMATIC DIAGRAM 4 TUNER ...
Page 38: ... 38 IC BLOCK DIAGRAM ...
Page 39: ... 39 ...
Page 40: ... 40 FL 11 BT 193GNK GRID ASSIGNMENT AND ANODE CONNECTION GRID ASSIGNMENT ANODE CONNECTION ...
Page 46: ... 46 VOLTAGE CHART ...
Page 47: ... 47 ...
Page 48: ... 48 ...
Page 65: ... 65 CD MECHANISM EXPLODED VIEW 2 2 3ZG 2 A 3 6 2 5 1 9 10 4 7 8 ...
Page 73: ...2 11 IKENOHATA 1 CHOME TAITO KU TOKYO 110 8710 JAPAN TEL 03 3827 3111 9301944 9430209 921338 ...