Sanyo CLT-99 Service Manual page 7

ADJUSTMENT
(TABLE -5.1)
STEP CONDITION CH
1. LINE MOD. OSC OUTPUT 1kHz 4
(-20dBm) 300Hz 4
3kHz 4
2. DATA MOD. PRESS "REDIAL/PAUSE" 4
2.3 RECEIVING (See FIG -6, TABLE -6)
Test Equipment
• FM SSG (50 Ω OPEN TYPE)
• AC Voltmeter (ACVM)
• AC Adaptor (DC 12V ... Centre Minus)
Unit Condition
a) Disconnect the DC Power Supply.
b) Disconnect AF oscillator from TEL line, and connect AC voltmeter in parallel with distortion meter, terminated with 600 Ω during
load to the TEL line.
c) Disconnect linear detector from CN101 and connect FM SSG (1kHz, 2.5kHz dev., 49.830MHz, 46dBµV) to CN101.
d) Connect the DC power supply again, press "FLASH" & confirm current channel is at CH 6 (49.830MHz).
Slide S401 to "RINGER ON" (Rx MUTE will be OFF) & S402 to "PULSE".
e) Rx IF .... Align T301 to obtain maximum deflection and minimum distortion from the read of AC voltmeter
and distortion meter respectively.
f) Rx RF .... Change output level of FM SSG from 46dBµV to 5dBµV.
Align T101 & T102 to obtain minimum distortion at the distortion meter (less than 10%).
g) Rx AF LEVEL .... Change output level of FM SSG from 5dBµV to 46dBµV.
Align VR301 to obtain -6dBm ± 1dBm from the read of AC voltmeter, and confirm at the FM
SSG input of
300Hz (46dBµV): the output of ACVM -12dBm ± 4dBm.
the output of ACVM -18dBm ± 4dBm.
3kHz (46dBµV):
h) CD Level Check
– Switch position S402 TONE ( Tx "OFF" ).
– Connect OSCILLOSCOPE to CD OUT.
– Confirm CD level is High Low when FM SSG is 0
– Confirm CD level is High when FM SSG is 0 +2dBµ.
Adjustment
SSG
(FIG -6)
CN101 (H)
FM SSG
CN101 (E)
Mod. : 1kHz
Dev. : 2.5kHz
(TABLE -6)
STEP CONDITION CH
1. IF SSG Output : 46dBµV 6
2. RF SSG Output : 5dBµV 6
3. AF LEVEL SSG : 46dBµV (1kHz) 6
(300Hz) 6
(3kHz) 6
4. CD LEVEL SSG Output : 0 +18dBµV 6
0 +2dBµV
CLT-99/SS (S/M) 6 7
ADJUST ADJUSTED VALUE SPECIFICATION
3.0V ± 0.15kHz dev.
VR601 3.0kHz dev.
2.2 ± 0.40kHz dev.
NONE NONE
3.8 ± 0.60kHz dev.
NONE NONE
5.0 ± 1.00kHz dev.
NONE NONE
• Distortion Meter
• Dummy Load (600 Ω)
+24dBµ.
Unit
600 Ω
Loop
(TEL LINE)
Simulator R
Power Supply
48VDC 50mA
ADJUST ADJUSTED VALUE SPECIFICATION
T301 Maximum Level less than 5%
T101/T102 Minimum Distortion less than 10%
-6dBm ± 1dB
VR301 -6dBm
-12dBm ± 4dB
NONE NONE
-18dBm ± 4dB
NONE NONE
NONE NONE CD OUT : High
NONE NONE CD OUT : High
-10-
ADJUSTMENT
PARTS LOCATION (BASE)
CN101
T101 (Rx, R)
T102 (Rx, R)
T103
(Rx, VCO)
Rx VCO
T201
(Tx, VCO)
T203
(Tx, POWER)
Tx VCO
VR601
(Tx MOD)
CN703
(SPEAKER)
CN702 (MIC)
S403
(SPEAKER
KEY)
TEST POINT (BASE)
6 ANT (H)
7 ANT (E)
# EXP. OUT
AC
Voltmeter 9 Rx VCO
8 COMP. OUT
! Tx VCO
Distortion
Meter
4 SPK (H)
5 SPK (E)
( CPT
Low
High
12/1/00, 3:17 PM
Rx MUTE ON
JIG SW
S001
~ DC 12V (–) + DC 12V (+) - VCO GND
RINGER SW ON
TOGGLE SW
)
CPR
S002
~
JIG SW
SPEAKER KEY
GND
-11-
Rx MUTE
OFF
Tx POWER
ON
Tx POWER
OFF
VR301
(Rx LEVEL)
GND (VCO)
T301 (IF. R)
CD LEVEL
S404
(PAGE/INT
KEY)
RINGER SW ON
% AC
CHECK
1 TEST
$ CD LEVEL
2 MIC (H)
3 MIC (E)
& PAGE/INT.
KEY