Sony CFS-W501L/S - Page 9

CFS-WS5O1L/S CFS-W501L/S |
B) Record Bias Adjustment
Setting:
GEQ: mechanical mid
FUNCTION: TAPE (RADIO OFF)
¢ counter
Procedure:
1. Mode: record
af osc
O attenuator
as |
blank tape
CS-121
3002
EXT MIC
1) 315Hz
2) 6.3kHz
} 77.5 uV (-80dB)
ring and 2. Mode: playback
'S Hz). recorded VTVM
portion
put into
PHONES
ed read- 3. Confirm that the 6.3 kHz playback signal level
e€ speed is 0 +3dB relative to the 315 Hz signal.
If necessary, adjust by connecting or discon-
necting R382.
Adjustment Location: MAIN board
put into
ed read-
e€ speed
ment at
)
2d.)
—-11—
1-3. RADIO SECTION
ELECTRICAL ADJUSTMENTS
e Repeat the procedures in each adjustment several
times, and the frequency coverage and tracking
adjustments should be completed by the (cores
of the) coils.
FM SECTION
FUNCTION: RADIO
BAND: FM
FM rf signal
generator
400 Hz, 30% FM modulation
frequency deviation +22.5 kHz Frequency coverage: CNP32-2
Output level: as low as possible FM tracking: 8 (R-ch)°9 (L-ch) Pin of CNP15
NULL adjustment: Pin 33 and 34 of IC
FM antenna input
TUNER BOARD (COMPONENT SIDE)
NULL ADJUSTMENT
Adjust until the reading of the
VTVN will be 0.
Pa Mie (55)
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for the specified reading on the VTVM.
108 MHz 8.0 +0.1V L2
Tune to 87.5 MHz and confirm that the reading
on the VTVM is 4.5 +0.2 V.
FM TRACKING ADJUSTMENT
Adjust for a maximum reading
on the VTVM.
#7.5
AM SECTION
FUNCTION: RADIO
BAND: AM
AM rf signal
generator
Put the lead-wire
antenna close to
the set.
vO
=e
30% amplitude modulation
by 400 Hz signal AM IF: 8 or 9 pin of CNP15
Output level: as low as possible { AM coverage: CNP32-2
TUNER BOARD (COMPONENT SIDE)
AM COVERAGE ADJUSTMENT
LW (AEP Model)
153kHz
Adjust for the specified reading
on VTVM.
MW (E Model)
Adjust for the specified reading
on VTVM.
531kHz |1.39+0.1V
After LW/MW adjustment tune to
the following frequency and confirm
that the reading on the VTVM satis-
fies the specification.
21.9 MHz (SW)
7.15+0.2V
Adjust for a maximum reading
and a flat passing characteristic.
AM IF ADJUSTMENT