Sanyo CLT-99, Руководство по обслуживанию

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