Sony CFS-W501L/S - Page 7

Head Height Adjustment ~
Procedures:
1.
DECK A: PB
DECK B: REC
Test Cassette: CQ-009C
Viewing from the front, adjust the head heights
to eliminate tape curl and tape twist at portions
of arrow. If .a satisfying result is not provided
with only turning the screws, change the ad-
justment shim or the shim lug.
Adjustment Shim
3-578-138-01 (t =0.1)
3-578-138-11 (t =0.2)
3-578-138-21 (t.=0.3)
Shim Lug
3-331-108-01 (t=0.1)
3-331-108-11 (t =0.2)
3-331-108-21 (t =0.3)
3-331-108-31 (t =0.4)
3-331-108-41 (t=0.5)
REC/PB Head Installation and Position Adjustment
Procedures:
1.
2.
Test Cassette: CQ-009C
Set the cassette tape into the set and install the
head with the screws so that the edge of the
head is in contact with the spacer when pressing
the FWD button and FF button or the FWD
button and REW button at the same time. (At
this time, the portion marked by @ is in con-
tact with the cassette). Then, adjust the REC/
PB head Azimuth Adjustment and apply lock-
ing compound to an installation screw.
cassette guide
*62mm '
M2378 inch
Spacer: Prepare a suitable material and install it
so that distance marked by * is 62mm (2-3/8
inches) and apply locking compound.
playback head
Adjustment Shim
erase head record/playback head
Adjustment Shim
Note: If the Test Cassette CQ-009C is not avail-
able prepare adjustment cassettes as shown
below.
(A) For the Head Height Adjustment.
Cut out hatched
tape cassette portions.
(B) For the REC/PB Head installation and
Position Adjustment.
Cut the tape and roll
in
the
case.
Shield
Plate
(Apply locking
compound to both
Remove the record i
proof claw.
Cut the cassette
half.
Cut the cassette
tape.
1-2. TAPE RECORDER SECTION
ELECTRICAL ADJUSTMENTS
Note: The adjustment should be performed in the order
given in this service manual. The adjustments
should be performed for both L-CH and R-CH.
@ Switches and controls should be set as follows
unless otherwise specified.
FUNCTION: TAPE (RADIO OFF)
VOLUME: mechanical mid
GEQ: mechanical mid
@ Standard Input Level
source impedance 300 2 10kQ
0.77 mV 0.43 V
input
level
(-60
dB)
(-5
dB)
MIC: -46 dB
© Standard Output Level
Output terminal PHONES Speaker
load impedance 322 3.2 2
0.25 V (-10dB) | 0.775 V (0 dB)
output level
Test tape:
Type Signal Used for
P-4-A063 6.3 kHz, -10 dB Azimuth Adjustment
3 kHz, OdB_ | Tape Speed Adjustment
Adjustment screw
Record/playback Head Azimuth Adjustment
Setting:
test tape
P-4-A063
(6.3 kHz, -10 dB)
PHONES
Procedure:
1. Mode: FWD playback
2. Turn the adjustment screw for the maximum
output levels. If these levels do not match, turn
the adjustment screw: until both of output
levels match together within 2 dB.
R-CH
screw Peak
position
—* screw
pce ied Position
peak peak
3. Phase Check
Mode: playback
test tape
P-4-A063
6.3 kHz, -10 dB,
f . : Oscilloscope
[Screen pattern pattern
inphase 45° 138 180",
CO phe AO 2 00 a, a0
good wrong