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Dolby Level Adjustment
setting:
[SHIFT]
button
[3]
Preset
(PLAY MODE) button : NR off
SOUND (BAS) button
SOUND (TRE) button
SOUND (BAL) button
SOUND (FAD) button
SOUND (VOL) button
MAIN board
TP (DOLBY-L)/
test tape
TP (DOLBY-R)
P-4-D400
(400 Hz, 0 dB)
set
Procedure:
1. Put the set into the FWD PB mode.
2. Adjust RV251 (L-CH) and RV261 (R-CH) so that the level
meter reading is – 6 ± 0.5 dB (0.37 to 0.41 V).
Adjustment Location: See page 17.
: ON (light up SET UP
and PLAY MODE)
: Center
: Center
: Center
: Center
: Maximum
level meter
+
–
– 15 –
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. AM Auto Scan/Stop Level Adjustment
FM Auto Scan/Stop Level Adjustment
Setting:
[SOURCE]
button : FM
FM RF signal
generator
0.01 µ F
Carrier frequency : 97.9 MHz
: 22 dB (12.6 µ V)
Output level
Mode
: mono
Modulation
: 1 kHz, 22.5kHz deviation (30%)
Procedure:
1. Set to the test mode. (See page 14.)
[SOURCE]
2. Push the
button and set to FM.
Display
3. Adjust with the volume RV2 on TU11 so that the "FM" indi-
cation 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.
Display
Adjustment Location: See page 17.
0 dB=1µV
antenna jack (CN11)
set
SHUF1
SHUF1
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