Sanyo GCD 2000 Service Manual page 3

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BEFORE USE OR TRANSPORTATION
Before transportation 4. Remove the dust cover.
1. Remove all discs from the trays.
5. Attach the transportation sheet and tape.
2. Turn off the power.
6. Confirm the power off when after base mechanism is
3. Disconnect the AC power cord, patch cords and
chucking. (Displayed the "NO DISC")
remote control
cord.
ADJUSTMENT (TUNER)
. Adjust the intermediate frequency of AM and FM to the frequency of ceramic filter.
. Use a plastic screwdriver for adjustment.
SG RF Level
: 75 ohm Open voltage
1. FM BAND
Antenna: 75 ohm Direct, Modulation
:1 kHz, Dev. : ~
7?5kHz
(mono / stereo) . f 40kHz (main)
~ 6.75kHz(pilot)
PARTS STANDARDS
Usually, not to alignment for
T2201
presetted. See note ~
Confirm voltage is about
L2 104
1.1-1 .3V.
STEP ITEMS
TUNING
FREQUENCY
INPUT
COND~
MEASURE
ON
OUTPUT CONDITION
INPUT
I
MEASURE OUTPUT
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1
IF(V CURVE)
10.7 MHZ
IF Sweep generator
.—
t-
87.5 MHz
2 COVER
108.OMHZ
DC Voltmeter
TP202(H)
—-—
TP201(E)
Confirm voltage is below 8.5V
.
.',
L2102
L2 103
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90.OMHZ
TP211(H)
VTVM
TP233(L)
TP212(E) Oscilloscope
TP234(R)
TP235(E)
FM SG
(about 8dB)
AF output maximum
3 TRACKING
F
CT201
T2202
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Digital Voltmeter
TP203(H)
TP204(E)
OV tO.05V. See note@
=H
4
Ov
5 Vco 98.OMHZ
FM SG
(66dB)
-.
SVR23 19 KHz k 50Hz See note@
L-R. R-L : Minimum
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e..-
---—
6
SEPARATION
DEV(MAIN) = f40kHz
Confirm stereo indicator lights
up.
Stereo
7
Sensitivity
98.OMHZ FM SG
Note : ~ Confirm IF waveform maximum and symmetric as shown below. If IF waveform is NG, please adjust T2201 as it
become GOOD.
A --'dX-"-
+=L-
GOOD
NG NG
.
,. ,.,
,.
@ Be careful so that digital voltmeter earth may not be in contact with other measuring equipments earth.
@
Adjust in the modulation
off
after the stereo indicator light on.
2. AM BAND (No alignment)
F
Antenna : IRE Loop, Modulation : 1000Hz 30?
STEP
ITEMS
1
COVER
2 TRACKING
=-l===
3N
OUTPUT
CONDITION
INPUT
MEASURE
OUTPUT
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Confirm S 8.5V (about 7.7V)
531kHz
--—
1701kHz
Digital Voltmeter
TP202(H)
-—---
TP201 (E)
+
output : Maximum
-----
Adjust to near
the effective sensitivity.
--.-—
LOOP
VTVM
TP233(L)
Oscilloscope
TP234(R)
ANT
TP235(E)
+
603kHz
AM SG
1404kHz
(about 80 dB)
-""
E
I
Confirm auto tuning stops
----.-
LOOP
Digital Voltmeter
_
ANT
-2-