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ADJUSTMENT
d) Rx IF
.... Align T351 to obtain maximum deflection and minimum distortion at AFVM and distortion meter
respectively. (SP OUT: Max)
.... Align VR351 to obtain 40 ± 5mV Speaker output at AFVM at Volume Normal.
e) Rx AF Level
Confirm the speaker output is 40 ~ 80mV. (FM SSG: 300Hz mod, 46dBµV)
Confirm the speaker output is 5.3 ~ 10.5mV. (FM SSG: 3kHz mod, 46dBµV)
Push "MEMORY" key to change volume to High.
Confirm speaker output at 1kHz is 55 ~ 115mV.
f) Rx RF
.... Reduce the output level of FM SSG from 46dBµV
Align T151 & T152 to obtain minimum distortion.
Confirm the distortion is less than 10% (SINAD 20dB) at the distortion meter.
(FM SSG: 1kHz mod, 3.0kHz dev., 30.200MHz)
g) CD Level Check
.... Connect OSCILLOSCOPE to CD OUT (IC 001 pin 24).
Push "END" key to off Tx Power. (CAUTION: SP Output is muted.)
Confirm CD level is High
Confirm CD level is High when FM SSG is 0
h) Batt. Low
.... Connect DC Voltmeter to Batt. Low Detect (IC 001 pin 44).
Confirm the Batt. Low output of pin 44 (IC 001) is High level when DC Power Supply is 3.55V.
Confirm the Batt. Low output of pin 44 (IC 001) is Low level when DC Power Supply is 3.05V.
Adjustment (T-3)
(FIG -3)
Unit
pin 24
IC 001
(CD)
FM SSG
ANT
Mod. : 1kHz
Dev. : 3.0kHz dev.
TEST
(TABLE -3)
STEP
CONDITION
CH
1. IF
SSG Output : 46dBµV
6
2. RF
SSG Output : +5dBµV
6
3. AF Level
1kHz
6
(Vol. Normal)
300Hz
6
3kHz
6
4. AF Level
1kHz
6
(Vol. High)
5. CD Level Check
0
+24dBµV
6
(Tx Power OFF)
0
+2dBµV
6
6. BATT. LOW
CD Level : 3.55V
6
CD Level : 3.05V
6
CLT-99/SS (S/M) 6
5
+5dBµV.
Low when FM SSG is 0
+24dBµV.
+2dBµV.
Oscilloscope
DC
Voltmeter
150 Ω
pin 44
(H)
AF
(Batt Low.)
Voltmeter
R
Ear Spk.
GND
Distortion
Meter
ADJUST
ADJUSTED VALUE
SPECIFICATION
T351
Maximum level
Minimum Distortion
T151
Minimum Distortion
Less than 10%
T152
VR351
40mV
35 ~ 45mV
NONE
NONE
40 ~ 80mV
NONE
NONE
5.3 ~ 10.5mV
NONE
NONE
55 ~ 115mV
NONE
NONE
CD OUT : HIGH
NONE
NONE
CD OUT : HIGH
NONE
NONE
BATT. LOW OUT : HIGH
NONE
NONE
BATT. LOW OUT : LOW
-6-
ADJUSTMENT
PARTS LOCATION
(REMOTE MAIN)
SPEAKER (GND)
MIC (GND) MIC IN (H) GND
SPEAKER (H)
NI-CD
VR351
BATT.
(Rx LEVEL)
TEST POINT LOCATION
(REMOTE MAIN)
! MIC (H)
MIC (GND)
LOW
HIGH
4
5 SPEAKER (H)
12/1/00, 3:17 PM
CD
+B
T253 (VCO. T)
VR651 (MOD. T)
T351 (IF-R)
VCO. T
VCO. R
T153 (VCO. R)
& GND
# +B (NI-CD BATT)
$ VCO. T
SPEAKER (GND)
6 EXP OUT
8 CD
9 BATT. LOW
-7-
T152 (RF-R)
ANT (H)
T151 (RF-R)
ANT GND
% GND
3 VCO. R
2 ANT (GND)
7 COMP OUT
1 ANT (H)
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