Sanyo CLT-186X Service Manual page 7

ADJUSTMENT
Adjustment (T-2)
Output impedence
600 Q
Unit
RF (H)
AF
Loop
(TEL Line)
Linear
Oscillator
Simulator
RF (E)
Detector
R31 O GND
Power
+~
!
supply
48V oc
220 ~F/10V
(FIG-3)
STEP
I
CONDITION
I ADJUST I ADJUSTED VALUE
I
SPECIFICATION
I
I I I
3. LINE Mod. ]OSC OUTPUT II kHz
I VR601 2.0 kHz dev.
2.0 ~ ().1 kHz dev.
(-20 dBm)
300 kHz
------
1.4 kHz dev.
1.4 t 0.45 kHz dev. -
I I
1 1
13 kHz
-. ...-
3.3 kHz dev.
3.3 ~ ().45 kHz dev.
4. DATA Mod.
. .. .. .. .. ... ... .
------
3.5 kHz dev. 3.5 * 1.0 kHz dev.
(TABLE-3)
1-3. RECEIVING (See FIG-4, TABLE-4)
Test
Equipment
FM SSG (50 Q : OPEN TYPE)
AC Voltmeter (AFVM)
AC Adapter (DC 9.OV CENTER MINUS)
Distortion Meter
Dummy Load (600 Q)
Unit Condition
a)
b)
c)
d)
e)
f)
9)
Set the condition as in 3-2.
Depress "PAGE to change to channel 6, 30.220 MHz
confirm through frequency counter.
Switch position
S402 -) TONE Tx "OFF"
Connect the circuit as shown below.
Set the frequency Modulation Signal generator to
39.900MHz, 1000Hz mod. 2000Hz dev. and 46dBU to 5dBy
Rx IF
Align T301 to obtain maximum deflection and minimum
distortion from the read of AC voltmeter and distortion meter
respectively.
Rx RF
Change output level of FM SSG from 46 dBp to 5 dBp.
Align T101, 102 to obtain minimum distortion at the distortion
meter (less than 10?4.)
-6-
h) AF LEVEL
Change output level of FM SSG from 5 dB~ to 46 dBk.
Align VR302 to obtain –3.OdB~ * 0.5 dB from read of AF
voltmeter, and confirm at the FM SSG input of
300 Hz: the output of AFVM
–2.0 dBm * 2 dBm
3 kHz: the output of AFVM
–9.5dBm i 3 dBm
i) CD Level Adjustment
Change output level of FM SSG from 46 dBm to 10 dBm.
Align VR301 anti-clockwise so that the DC voltmeter just turn
to Low,then align VR301 clockwise so that the DC voltmeter
just turn to Low.
Confirm the CD Level is Low by changing the FM SSG output
8dBV.
Confirm the CD Level is High by changing the FM SSG outDut
12dBp.