Tuner Section - Sony XR-C6200 Service Manual

Dolby Level Adjustment
Setting:
[SHIFT]
button
[3]
Preset (PLAY MODE) and
→
[4]
( ) buttons
SOUND (BAS) button
SOUND (TRE) button
SOUND (BAL) button
SOUND (FAD) button
SOUND (VOL) button
D-BASS control
MAIN board
test tape
P-4-D400
(400Hz, 0dB)
set
Procedure:
1. Put the set into the FWD PB mode.
2. Adjust RV101 (L-CH) and RV201 (R-CH) so that the level
meter reading is –6±1 dB (0.35 to 0.44 V).
Adjustment Location: See page 17.
: ON
: NR OFF
: Center
: Center
: Center
: Center
: Maximum
: OFF
L-CH: TP (DOLBY-L)
R-CH: TP (DOLBY-R)
level meter
+
–
MAIN board
TP (GND)

TUNER SECTION

Cautions during repair
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. MW Auto Scan/Stop Level Adjustment
FM Auto Scan/Stop Level Adjustment
Setting:
[SOURCE]
button
FREQUENCY SELECT switch : FM 200 k
FM RF signal
generator
Carrier frequency
Output level
Mode
Modulation
Procedure:
1. Set to the test mode. (See page 14)
[SOURCE]
2. Push the
3. Adjust with the volume RV2 on TU1 so that the "FM" indica-
tion turns to "FM0" indication on the display window.
But, in case of already indicated "FM0", turn the RV2 so that
put out light "0" indication and adjustment.
Adjustment Location: See page 17.
– 15 –
0 dB=1 µV
: FM
antenna jack (J1)
0.01 µ F
set
: 97.9 MHz
: 22 dB (12.6 µ V)
: mono
: 1 kHz, 22.5 kHz deviation (30%)
button and set to FM.
Display
SHUF
Display
SHUF