Measurements And Adjustments - Panasonic RM-1100 Service Manual

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MEASUREMENTS AND ADJUSTMENTS
• FM RF ALIGNMENT • ALIGNMENT POINT
AM SIGNAL GENERATOR FREQUENCY OSCILLO
BAND DISPLAY SCOPE ADJUSTMENT REMARKS
CONNECTIONS FREQUENCY SETTING
Connect to antenna
550 kHz (400 Hz,
W.....
(+)
Adjust for maximum
AM
socket through AM
0% Mod. 74 dB) 550kHz
V· ..·(-)
T301 (AM NB) wave from on
RF dummy antenna.
(Refer to Fig. 18)
oscilloscope.
-~
......
: ::..~
Vi
I
FM lsI
IO.7MHz
~
FM OSC
I08MHz
~
FM OSC
87.5MHz
@]-
AM ANT
1500kHz
----,
cnol
,-
FM SIGNAL GENERATOR FREQUENCY DC
BAND DISPLAY VOLTMETER ADJUSTMENT REMARKS
CONNECTIONS FREQUENCY SETTING
.-
~.
'-
Disconnect No signal
87.5 MHz
V ..
(+) L5
Adjust for 1.2±0.05 V
applied
V ..(-)
(FM OSC Coil) readig on DC voltmeter.
FM Disconnect No signal 108 MHz
V ..
(+) CT3 Adjust for 8±0.1 V
applied
V ..·(-)
(FM OSC Trimmer) reading on DC voltmeter.
Repeatsteps(1) and (2).
FM SIGNAL GENERATOR FREQUENCY AC
BAND DISPLAY VOLTMETER ADJUSTMENT REMARKS
CONNECTIONS FREQUENCY SETTING
Antenna socket 89 MHz
'V..
(+)
L1 (FM ANT Coil) Adjust for maximum
(FMRFDummy (400 Hz 30%) 89 MHz
V ..(-)
L4 (FM ANT Coil) reading on AC voltmeter
Fig. 19)
FM
" 107 MHz 107 MHz V ..
(+)
cn
(FMANT
"
Trimmer)
(400 Hz 30%)
-
V ..(-)
CT2 (FM ANT
'f . • • • ~ Timmer)
eI
Repeat steps 4 and 5.
FM SIGNAL GENERATOR FREQUENCY DC
BAND DISPLAY VOLTMETER ADJUSTMENT REMARKS
CONNECTIONS FREQUENCY
SETTING (center "0")
Antenna scoket 89 MHz
V ....
(+) T3 Adjust T3 for -0.05.-,..0.05 V
FM (400 Hz, 30% 89 MHz
V·· ..(-)
(FM 1FT) reading on DC voltmeter.
Mod,60dB)
Notes: 1. Stereo modulator ................ eConnect stereo modulator output to EXT MOD terminal of signal generator.
ePilot signal modulation to "10%".
2. FM signal generator ............ eFrequency approximately 100 MHz/Output level to "60-70 dB", 1-3 mV.
eModulation mode to "FM".
CIRCUIT
SIGNAL FREQUENCY AC ADJUSTMENT REMARKS
GENRATOR COUNTER VOLTMETER
High side thru,
PILOT 89 MHz 100 kO to test
- -
VR2 Adjust for 76.00 kHz±50 Hz readign on
(0% Mod, 80 dB) pointV Negative (Pilot) frequency counter.
sidetoV
89 MHz
Make adjustment so that when the antenna
SEPARATION (400 Hz, 30% Mod,
i . .
L Ch
(+)
VR1 input is sUbjected to L modulation (or R
... Rch
(+)
80 dB)
...
(-)
(Separation) modulation.) R channel output (or L
channel output) becomes minimum.
• AZIMUTH ALIGNMENT
TAPE AC AC ADJUSTMENT REMARKS
VOLTMETERG) VOLTMETER@
Playback the azimuth tape. Across headset
Across headset
V ..
Lch (+)
Adjust for same reading on AC
V ..
Rch (+)
voltmeterG) and @.
v··(-)
• FM STEREO ALIGNMENT
(3)
(2)
(1 )
(6)
' - '
- - - ' - , - - - - - - -
• DC BALANCE NB ALIGNMENT
(5)
(4)
4. Set volume control to maximum.
5. Set band switch to AM, FM.
6. Set SENS switch to DX.
SIGNAL GENERATOR or FREQUENCY INDICATOR
SWEEP GENERATOR DISPLAY (ELECTRONICS ADJUSTMENT REMARKS
BAND
CONNCTIONS
I
FREQUENCY
SETTING VOLTMETER
or SCOPE)
AM~IF
ALIGNMENT
V .. · .... (+)
450kHz
Point of non-
V···(+)
T302(AM 1st 1FT) Adjust for maximum
AM Earth ..... (-) 30% Mod. interference. (onl
V ..(-)
T303(AM 2nd 1FT)
output.
at 400 Hz about 600 kHz)
AM IF ALIGNMENT
AM RF ALIGNMENT
1. Set power switch to ON.
2. Mute switch to OFF.
3. Intcom switch to HS.
AM SIGNAL GENERATOR FREQUENCY DC
BAND DISPLAY VOLTMETER ADJUSTMENT REMARKS
CONNECTIONS FREQUENCY SETTING
Disconnect No signal 520 kHz
V· ..
(+)
L303 Adjust for 1.2±0.05 V
applied
V·,·(-) (AMOSCCoil) readig on DC voltmeter
AM Disconnect No signal 1610kHz
V ..
·(+)
CT302 Adjust for 7.8±0.1 V
applied
V···(-)
(AM OSC Tr.immer) reading on DC voltmeter
Repeat steps (1) and (2).
AM SIGNAL GENERATOR FREQUENCY AC
BAND DISPLAY VOLTMETER ADJUSTMENT REMARKS
CONNECTIONS FREQUENCY SETTING
Connect to antenna
'V..
(+)
L301 (AM ANT Coil)
Adjust for maximum
socket through AM
550 kHz 550kHz
v ..(-)
L304 (AM ANT Coil) reading on
RF dummy antenna.
AC voltmeter
(Refer to Fig. 18)
CT301 (AM ANT
AM " 1500kHz 1500kHz ; ..(+) Trimmer)
... (-)
CT303 (AM ANT "
Trimmer)
Repeat steps (4) and (5).
AM NB ALIGNMENT
SIGNAL GENERATOR or FREQUENCY INDICATOR
SWEEP GENERATOR DISPLAY
(ELECTRONICS ADJUSTMENT REMARKS
BAND
SETTING VOLTMETER
CONNCTIONS FREQUENCY or SCOPE)
FM-IF ALIGNMENT
High side thru. Connect vert.
0.0011JF to test 10.7MHz Point of non-
amp. of scope to Adjust for maximum
FM
point
~
Negative SWP. interference. (onl testpointV T1 (FM 1st 1FT)
amplitude.
side to test point
V.
about 90 MHz) Negative side to
(Refer to Fig. 16)
testpointV
FM
" " " " T3 (FM 2nd 1FT)
Adjust for maximum
amplitude.
(Refer to Fig. 17)
FM ALIGNMENT
~
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