Panasonic SG-65 - Alignment Instructions (Radio-2); FM-RF Alignment; FM Mono Distortion Alignment; Free Run Alignment

ALIGNMENT
INSTRUCTIONS
(RADIO-2
ALIGNMENT
POINTS
(RADIO)
a FM-RF ALIGNMENT
SIGNAL GENERATOR
INDICATOR
FM
MODE
|
an
yyst
REMARKS
DISPLAY
CONNECTION | FREQUENCY (VTVM or SCOPE) | SWITCH
FM MONO DISTORTION ALIGNMENT
MW OSC LW OSC Separation FM Free Run
1st IFT (Earth)
tlle
to
EXT.
98
MHz
Distortion
meter
to
7202
Adjust
for
minimum
T203
Me
Senne
100%
Mod.
speaker
jack
(L).
;
distortion
meter
terminal
through
|
Wish
‘agg
He
(FM
Disc)
|
indication
PTL
a]
dummy antenna. (Imp. 42). : LW OSC (0 (| TP301
=
FM
Stereo
Alignment
Rs
(O]
el
ce
TP102
FREE RUN ALIGNMENT _
EQUIPMENT
CONNECTION
|
ADJUST
REMARKS
108
ES
(Earth)
Connect
frequency
counter
to
TP301
and
TP302
(Earth)
VR302
Adjust
VR302
for
19
kHz
+50Hz
on
frequency
counter
2nd
IFT
||
at
98
MHz,
non
modulation
with
60
dB
input.
reading.
T204
[O}
SEPARATION
ALIGNMENT
3rd
IFT
FM
Disc
7 | a | | een: |
Ni
.
Stereo
Modulator:
Connect
Stereo
Moduiator
to
EXT,
Mod.
terminal
of
signal
generator.
T205
R220
T202
MW ANT
FM Disc (e) | cT101 | 01
oy toh
TP202
. Signal Generator: Modulation Rate of 19 kHz Pilot Signal 9%
Modulation Rate of Right and Left Signal . . . 30% (1 kHz)
Output Level
3. Tuner (Balance Control): Adjust balance control so that output level from both channels becomes equal.
FM Tuner Pack
(Earth) gS
©
> @
locum °)
EQUIPMENT CONNECTION
| ADJUST REMARKS
TP101
SIGNAL
GENERATOR
OSCILLOSCOPE
|
FM
Tuner
Pack
—
Adjust
VR301
for
minimum
indication
of
VTVM
VU
Meter
p®)>
(AM
ANT
P,
C.
Board)
Connect
vertical
from
the
left
side
output
when
the
right
side
of
|
vR806
|
Px
Connect
to
EXT.
FM
Connect
across
;
VR301
bch
ae)
TP203
antenna
terminal
speaker
jack.
amp.
input
of
|
(Separation
pant
ire
tad
Ue
lat
enetiaeer
he
ri
r
n®)
is
=
through dummy antenna (Imp. 42) scope to terminals Control) djust VR301 in the same way for the right side. VU Meter 8 VU Meter
s
of
VTVM.
Adjust
for
best
balance
between
‘‘L
to
R'’
and
[
VR805
|
7
"
“’R
to
L”
separation.
VR805
fae:
Pe
VR808
MWANT vu Meter
Note: When aligning separation, disconnect frequency counter.
= VU METER ALIGNMENT
TP204 TP206
(Earth)
VTVM CONNECTION
TAPE DECK DOLBY NR
. C, Boar
| reeos | * Apply 150 mV, 1 kHz to AUX,
REC Volume | - Adjust Rec Volume to get 580 mV
reading on VTVM.
i
.
.
VR807
-
Adjust
VR807
and
VR808
to
light
at
(
MEONMERTON
VR808
+2VU
(
mark).
Recording
|
» Attenuate the applied signal by —20dB, :
then
adjust
VR805
and
VR806
to
light
7
i
CPU
Clock
at —18 VU.
No
connection
+
Repeat
Steps
2
and
3.
]
m SYNTHESIZER ALIGNMENT
SYNTHESIZER
ALIGNMENT
j
ALIGNMENT COUNTER CONNECTION
ADJUST REMARKS
PLL TPOO1 Shield Case - Connect frequency counter between TPOO1 and shield case.
Standard OSC | (pin 12 of ICQ02) , - Confirm that the frequency is 100 kHz 0.9 Hz.
TP002 - Connect frequency counter between TPOO2 and shield case. |
(pin 28 of ICO003) LOO4 - Confirm that the frequency is 150 kHz ~ 200 kHz, and adjust !
CPU Clock L004 to count 200 kHz when the frequency isbeyond 200kHz.
KEY SWITCH
(Synthesizer P. C. Board)
and off—error display “ by calling the other frequencies beside
“"87.5"" MHz" ~ ‘108.00 MHz.
ae a TP0O3
(Q012 collector)
+ Confirm that the frequency display becomes ‘108:00’’ MHz
by calling ‘87.5’’ MHz and pushing ‘‘DOWN” key SW once,
- Confirm that the frequency display becomes ‘87.5’ MHz by
Ce calling ’’108.00"" MHz and pushing “UP” key SW once.
+ Confirm that the frequency display becomes “000.00—turn on
5
SG-65
SG-65
6