Read Sony XR-3750 / XR-3758 / XR-3759 / XR-7750 / XR-C350 / XRS-888 Service Manual online
– 19 –
TUNER SECTION
0 dB=1 µV
Cautions during repair
When the tuner unit is defective, replace it by a new one be-
cause its internal block is difficult to repair.
cause its internal block is difficult to repair.
FM Auto Scan/Stop Level Adjustment
Setting:
Setting:
SOURCE button: FM
See the adjustment location from on page 21 for the
adjustment.
adjustment.
0 dB=0.775 V
TAPE DECK SECTION
Tape Speed Adjustment
Procedure:
1. Put the set into the FWD PB mode.
Procedure:
1. Put the set into the FWD PB mode.
Speed checker
Frequency counter
–1.5 to +2.5%
2,955 to 3,075 Hz
Specification: Constant speed
Adjustment Location: See page 21.
FM RF signal
generator
Carrier frequency : 98.0 MHz
Output level
Output level
: 22 dB (12.6
µ
V)
Mode
: mono
Modulation
: 1 kHz, 22.5 kHz deviation (30%)
0.01
µ
F
set
antenna jack (J1)
Procedure:
1. Set to the test mode. (See page 18).
2. Push the SOURCE button and set to FM.
1. Set to the test mode. (See page 18).
2. Push the SOURCE button and set to FM.
Display
3. Push the preset 3 button.
Display
4. Adjust with the volume RV2 on TU1 so that the “FM” indica-
tion turns to “FMI” indication on the display window.
But, in case of already indicated “FMI”, turn the RV2 so that
put out light “I” indication and adjustment.
But, in case of already indicated “FMI”, turn the RV2 so that
put out light “I” indication and adjustment.
Display
set
+
–
test tape
WS-48A
(3 kHz, 0 dB)
WS-48A
(3 kHz, 0 dB)
LINE OUT (XR-C350)
SPEAKER OUT (XR-3750)
SPEAKER OUT (XR-3750)
10 k
Ω
(XR-C350)
4
Ω
(XR-3750)
speed checker
or
frequency counter
Adjustment Location: See page 21.
FM
98.0
SHUF1
FM
98.0
3
SHUF1
Click on the first or last page to see other XR-3750 / XR-3758 / XR-3759 / XR-7750 / XR-C350 / XRS-888 service manuals if exist.