Panasonic RX-FT560 Service Manual page 10

TAPE SPEED ADJUSTMENT
-
I
I
1
EQUIPMENT CONNECTION ADJUSTMENT
1
1
TEST TAPE
1
ELECTRONIC COUNTER 1
SIGNAL GENERATOR or
1
BAND
SWEEP GENERATOR REMARKS
RADIO DIAL INDICATOR
VOLTMETER or
1 1
CONNECTIONS FREQUENCY
1 /
OSCILLOSCOPE)
1 1 I
!
Headphones Jack (32R) Normal Speed Adjustment
Fabricate the plug a s shown
In
Flg. 2 and
thencon"edIheleadwiresollhepluglothe
1. Insert a test tape (QZZCWAT) in Tape 2 and play it back.
measuring instrument.
2. Adjust VR401 until the measured value becomes 3000
r
-
SW-RF ALIGNMENT
I
1 I I I
H e a d o h o n e s
I I I
Tuning capacitor
1
(
Fabricate ~ ~ ~ ~ i ~ ~ ~ ~ ) a n d I h e n the plug as
1
LIO ldjust for maxi-
5.75MHz
1
fully closed.
connect the lead wires 1 ,
(SW OSC ' O i l )
mum Output
essary to
j
QZZCWAT
(3 kHz)
3. Check Tape 1 in the same way to make sure it satisfies the specification.
Tape 1
...
+50Hz of the speed of Tape2.
If it doesn't repeat steps 1 and 2 above.
Note: This set uses one drive motor, so be sure to perform the adjustment in Tape 2.
High Speed Measurement
4. Insert the playback tape into Tape 1 and the editing tape into Tape 2.
5. Set the Editing Mode Selector to the "HIGH" position.
6. Press the Tape 2 Pause button, then press the Record Button.
7. Press the Tape 1 Playback Button.
Editing is started by means of the Synchro-Start function.
8. Check to be sure that the measured speed is at least 1.7 times faster than normal speed.
W
0
1 s t p i
1
\ : : : i t % : :
meas-/
1 1
,,
through
ceramic capacitor 8,8 MHz Tuning capacitor CT4 (SW OSC
(11) (1 0 PF). fully open. Trimmer)
ALIGNMENT POINT
Please refer to Circuit Board and Wiring Connection Diagram for test point locations.
SIGNAL GENERATOR or INDICATOR
SWEEP GENERATOR
RADIO DIAL (ELECTRONICS
I
BAND
I
,
SETING VOLTMETER or
FM 1st
LW ANT FM ANT
MW ANT BAND SWITCH
10.7 MHz
145kHz 106 MHz
1500kHz S W MW LW FM MW ANT
CONNECTIONS FREQUENCY
1
OSCILLOSCOPE)
FM-IF ALIGNMENT
(13)
Fig. 3
:
L5-1
!
ferrite
I
' - ' - '
FM-RF ALIGNMENT
('2)Adjust for
L4(FM OSC 1 maximum
"j
coil) output.
1
Connect to test
point through (E)(EB)~ 0 9 . 2 ~ ~ ~ Variable ca-
FM dummy antenna (EG) 108.25 MHZ pacitor fully
Negative side to test open.
OSC Trimmer)
k50kHz
Fig. 4
FM OSC/
FM
26d
MW
osc
L a
osc
'MW OSC \LW
OSC
86.2 MHz(E,EB). 10.7 MHz 1650 kHz(E,,EB) 136kHzlE.EB) 511 kHz(E,EB) 297kHz(E,EB)
~ ~ , ~ ~ M H ~ ~ ~ O ~ H ~ ( E G J
1639_+5kHz(EG) 13725kHz(EGI 51423kHzlEG) 297?5kHz(EG)
E l
p L q p J
m
1
106 MHz Tune to signal.
(
I 1
1
_ _ _ _ _ I
I
(17).
('2) three output responses w ~ l l be present; proper tun~ng is the center frequency.
SEPARATION ALIGNMENT
REMARKS
98 MHz, 60dB (CW) Connect
AdjustVRl ,for 19kHz k 5 0
1
to test p o i n t m t h r o u g h FM ... (+)
I
19kHz
Hz reading on frequency
dummy antenna.
...
(-) counter.
I
j
Negative side t o m
- - - - . - - A -
HEAD AZIMUTH ALIGNMENT
111_-
7
To Headphone
-
To Measuring
-
Instrument
R=32
Fig. 2
MECHANISM CONTROL P.C.B
ximum
i t steps
TAPE SPEED
, " ;muth Screw
Fig. 5
1
TEST TAPE IEQUlPMENT CONNECTION
I
- -
1
ELECTRONIC COUNTER I
r
--
7 -
Fig. 6
QZZCFM
1
Headphones Jack (320)
Fabr~cale the plug as shown
I"
Fig.
2
and
Azimuth screw
Maximum output.
(8 kHz, -20 dB)
then connect thelead wiresollhepiugla lhe
measuring instrumenl.