Inspections; Instruments Required For Inspection - Yamaha CDR-HD1500 Service Manual

CDR-HD1500
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I INSPECTIONS

Instruments Required for Inspection

• CD test disc (YEDS-18: TX911730)
• CD player with digital output (optical/coaxial) function (used as a digital signal generator)
• AV amplifier with digital input (optical/coaxial) function (used as a D/A converter)
• Analog signal generator
• HDD for jigs (HDD UNIT FOR SERVICE: AAX39420)
Step
Item
1
Display
TE
L 13942296513
Step Item
2
D/A Converter
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• CD-RW disc (TDK CD-RW AUDIO 74min [XA74N])
• Oscilloscope • Level meter
Mode Input signal
Test mode
Mode Input signal
Normal mode
CDR-HD1500
LINE OUT
(ANALOG)
YEDS-18
Track 2 (1kHz, 0dB)
Track 3 (20Hz, 0dB)
Track 6 (20kHz, 0dB)
Track 7 (Infinity Zero)
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• Distortion meter
Check method and standard
Disc
1. Turn on the power while pressing the
No disc
"
key. Keep pressing the "
and the "
mode" is displayed.
2. Check that all FL display units light up and go
off properly by pressing the "COPY" key.
3. Check each key for proper response as
follows. When any key other than POWER,
HDD, CDR and COPY is pressed, the
corresponding key name should be displayed.
Also, JOG Forward should appear when the
MULTI JOG knob is turned clockwise and
JOG Rewind should appear when it is turned
counterclockwise.
Also, each of operation indicator LEDs of
CDR and HDD lights in blue and orange
alternately every time the MULTI JOG knob
is turned.
Q Q
3 6 7 1 3 1 5
Check method and standard
Disc
1. Turn on the power. (In normal mode)
YEDS-18
2. Load the CD test disc (YEDS-18: TX911730).
3. Play track 2 (1kHz, 0dB).
4. Check that the output level of LINE OUT (ANA-
LOG) is 2 ± 0.5Vrms.
5. Check that the distortion factor (1kHz) is 0.01%
or less.
6. Play tracks 3 (20Hz) and 6 (20kHz) and check
that the frequency response is 0 ± 1.5dB.
7. Play track 7 and check that S/N is 100dB or
more.
Oscilloscope
Level meter
Distortion meter
co
.
9 4 2 8
" key and the " "
" key
" key until "TEST
0 5 8 2 9 9 4 2 8
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