Panasonic RX-5120LS Service Seite 6

RX-5120LS RX-5120LS
ALIGNMENT INSTRUCTION
1. Set volume control to maximum.
2. Set tone control to center.
3. Set band switch to MW, LW, SW or FM.
LW, MW, AND SW ALIGNMENT
ICl
SIGNAL GENERATOR
SWEEP GENERATOR
BAND
CONNECTIONS
1 3.42V
2 4.16V
3 4.15V Fashion loop of
several turns of
4
(1) MW wire and radiate
signal into loop of
5 4.45V
receiver.
6 4.41 V
7 3.49V
(2) LW
(3) LW
QI
1)Cementantennabobbinwith wax after completingalignment.
C 4.58 V
B 1.15V
E 0.46V
(4) MW
le1970mA
(5) MW
(*2) Cementantennabobinwith wax after completingalignment.
02
Connect to
4.16V (6) SW
c
ant. terminal
B 0.72V
through ceramic
capacitor (10 PF).
Negative side
(7) SW
to earth.
• FM ALIGNMENT
SIGNAL GENERATOR
SWEEP GENERATOR
BAND
CONNECTIONS
FREQUENCY
Connect to test
V through
point
(1) FM
0.001gF.Negative
side to earth.
(2) FM
Connect to test
pointV through
(3) FM FM dummy
antenna. (Refer to
fig. 14.)
(4) FM
(5) FM
16V
(*3) Threeoutput responseswill be present;propertuningis the centerfrequency.
ALIGNMENTS
READ CAREFULLY BEFORE ATTEMPTING ALIGNMENT
4. Set tape/radio/sleep selector to radio.
5. Set power source voltage to 12V DC.
6. Output of signal generator should be no higher than
necessary to obtain an output reading.
or INDICATOR
RADIO DIAL (ELECTRONICS
SETTING VOLTMETER
FREQUENCY
or SCOPE)
AM IF ALIGNMENT
455 kHz
Output meter
Point of non-
30% Mod.
across voice
interference.
at 400 Hz coil
LW-RF ALIGNMENT
Output meter
145 kHz
145 kHz
across voice
[11.2mm (15/3291
coil
285 kHz
285 kHz [166 mm
(617/32
MW-RF ALIGNMENT
Output meter
550 kHz
550 kHz
across voice
(12.9 mm
coil
1,500 kHz
1,500 MHz
[171.1 mm
(60/32
SW-RF ALIGNMENT
Output meter
6 MHz
6 MHz
across voice
[8 mm
coil
18 MHz
18 MHz
[188 mm
or
RADIO DIAL
INDICATOR
ADJUSTMENT
SETTING (VTVM or SCOPE)
Connect vert. amp.
Point of non- of scope to test point
Tl (FM FT)
10.7 MHz
(Primary)
interference. . Negative side
to test point V
T2 (FM FT)
(Secondary)
FM-RF ALIGNMENT
Variable
Output meter
87.5 MHz
capacitor IS (FM OSC coil)
across voice coil.
fully closed.
90 MHz
90MHz
tlJNE coil)
[26.1mm (11/32 31
CT2 (FM OSC
106 MHz
Trimmer)
106 MHz
(168mm
CTI (FM TUNE
Trimmer)
RX-5120LS RX-5120LS
LED METER
SEPARATION
ADJUSTMENT
REMARKS
ITEM
Adjustment Of
pilot signal.
T3 (AM ISt IFT)
Adjust for maximum
T4 (AM 2nd IFT)
output.
• AUDIO
ITEM
L7 (LW OSC
Adjust for maximum
coil) output. Adjust L2 by
moving coil bobbin
Bias current
coil) along ferrite core.
CT6 (LW OSC Adjust for maximum
Bias oscillation
Trimmer)
output.
frequency
CT4 (LW ANT
Repeat steps (2)
Trimmer) and (3).
Playback level
L8 (MW OSC
Adjust for maximum
coil) output. Adlust L2 by
moving co I bobbin
AN coil) along ferrite core.
CT7 (MW OSC Adjust for maximum
Trimmer) output.
CT3 (MW ANT Repeat steps (4)
Trimmer)
and (5).
L9 (SW OSC
coil) Adjust for maximum
L3 (SW ANT
output.
coil)
CT8 (SW OSC Adjust for maximum
Trimmer)
output.
CT5 (SW ANT Repeat steps (6)
Trimmer)
and (7).
REMARKS
Adjust for maximimum
amplitude.
(Refer to fig. 12.)
Adjust for maximum
amplitude.
(Refer to fig. 13.)
(*3) Adjust for maxi-
mum output.
(*3) Adjust for maxi-
mum output.
(*3) Adjust for maxi.
mum output.
Repeat steps.
ALIGNMENT
ITEM ADJUSTMENT
1. supply DC 85V throu h the DC IN jack.
Battery check VR301 2. Adjust VR301 so that
illuminate.
ALIGNMENT
SIGNAL EQUIPMENT
90MHz. 60dB CONNECTION
ADJUSTMENT
SOURCE
ELECTRONIC
CONNECTION COUNTER
+ side
ADJUSTMENT
MEASUREMENT
INPUT SPECIFICATION
POINT
Lch)
4.1±0.2mV
Rch)
(Use Croz tape)
Earth)
52kHz±1kHz
(Use Croa tape)
QZZCFM
Speaker
(315Hz, OdB)
ADJUSTMENT PARTS
MW ANT FM TUNE
'AUDIO CIRCUIT BOARDI
90UHZ
FM 1st
10.tMHz
Bias
Tl
o
o
FM OSC
FU OSC
o
o
Bias Current
AM 1st
'55kHz
FM 2nd
10.7MHz
T2
(LED METER CIRCUIT BOARDI
Battery
osc
13
o
[Fig. 10]
10.7 MHz
10.7 MHz
[Fig. 121 [Fig. 13]
REMARKS
5th LED from left begins to
REMARKS
SPECIFICATION
Adjust VRI for 19kHz
19kHz (±200Hz) reading on
electronics counter.
ADJUSTMENT
REMARKS
POINT
VRIOI (Lch) Record mode
Beat Proof -e I
VR201 (Rch)
Record mode
(Beat proof -+ I )
VR202(Rch) Playback mode
LOCATION
MW ANT LW ANT
14SkHz
106MHz
1-2
LW ANT
EkHz
SO ANT
18MHz
SW ANT
6 MHz
.w osc
& kHz
LW OSC
145 kHz
MW OSC
o c T7
sw osc
18MHz
o
OSC
6MHz
L9
(IC3
AM 2nd
455kHZ
'9kHz
[Fig. Ill
son
TO RECEIVER
TO SG
son
IMP 50m
751
[Fig. 141 FM Dummy Antenna