Test Mode; Electrical Adjustments; Tuner Section - Sony XES-Z50 Service Manual

SECTION 5
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TEST MODE

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This set have the test mode function. In the test mode, FM Auto
Scan/Stop Level and AM Auto Scan/Stop Level adjustments can
be performed easier than it in ordinary procedure.
Setting the Test Mode
1. Press the OFF button on the control unit to turn off the set.
2. Press the following buttons on the wireless remote commander
in the given order.
→ → LIST
3. Press the BACK button on the wireless remote commander
until a beep sounds (for more than 2 seconds).
4. At the same time as a beep, "Test" is displayed at the upper
left of display, and the test mode is activated.
Releasing the Test Mode
1. Press the OFF button on the control unit.
SECTION 6

ELECTRICAL ADJUSTMENTS

TUNER SECTION

Cautions during repair
TE
L 13942296513
When the tuner unit is defective, replace it by a new one be-
cause its internal block is difficult to repair.
Note: Adjust the tuner section in the sequence shown below.
1. FM Auto Scan/Stop Level Adjustment
2. FM Stereo Separation Adjustment
3. FM Noise Focus Adjustment
4. AM Auto Scan/Stop Level Adjustment
• In making adjustment, connect the control unit and changer unit.
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FM AUTO SCAN/STOP LEVEL ADJUSTMENT
Setting:
TUN/AUX button: FM
FM RF signal
generator
Carrier frequency : 97.9 MHz
Output level
Mode
Modulation
Adjustment Procedure:
1. Set to the test mode.
2. Press the TUN/AUX button on the wireless remote com-
mander to select FM.
3. Press the LIST button on the wireless remote commander to
display "PRESET NAME LIST".
4. Using cursor buttons on the wireless remote commander, se-
lect preset No.3, and press the ENTER button.
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5. Adjust with the volume RV203 on FM/AM tuner unit so that
the "FM" indication turns to "FM0" indication on the display
window.
But, in case of already indicated "FM0", turn the RV203 so
that put out light "0" indication and adjustment.
Adjustment Location: Control Unit (FM/AM tuner unit)
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antenna (MAIN) terminal
0.01 µ F
set
: 22 dB (12.6 µ V)
: mono
: 1 kHz, 22.5 kHz deviation (30%)
DISPLAY
DISPLAY
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DISPLAY
(See page 50)
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