Sanyo CLT-99, Service Manual

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ADJUSTMENT
ADJUSTMENT
STEP CONDITION CH ADJUST ADJUSTED VALUE SPECIFICATION
1. LINE MOD. OSC OUTPUT 1kHz 4 VR601 3.0kHz dev. 3.0V
±
0.15kHz dev.
(-20dBm) 300Hz 4 NONE NONE 2.2
±
0.40kHz dev.
3kHz 4 NONE NONE 3.8
±
0.60kHz dev.
2. DATA MOD. PRESS “REDIAL/PAUSE” 4 NONE NONE 5.0
±
1.00kHz dev.
(TABLE -5.1)
2.3 RECEIVING (See FIG -6, TABLE -6)
Test Equipment
• FM SSG (50
Ω
OPEN TYPE) • Distortion Meter
• AC Voltmeter (ACVM) • Dummy Load (600
Ω
)
• 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, 46dB
µ
V) 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 46dB
µ
V to 5dB
µ
V.
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 5dB
µ
V to 46dB
µ
V.
Align VR301 to obtain -6dBm
±
1dBm from the read of AC voltmeter, and confirm at the FM
SSG input of
300Hz (46dB
µ
V): the output of ACVM -12dBm
±
4dBm.
3kHz (46dB
µ
V): the output of ACVM -18dBm
±
4dBm.
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
➞
+24dB
µ
.
– Confirm CD level is High when FM SSG is 0 ➞ +2dB
µ
.
Adjustment
(FIG -6)
(TABLE -6)
STEP CONDITION CH ADJUST ADJUSTED VALUE SPECIFICATION
1. IF SSG Output : 46dB
µ
V 6 T301 Maximum Level less than 5%
2. RF SSG Output : 5dB
µ
V 6 T101/T102 Minimum Distortion less than 10%
3. AF LEVEL SSG : 46dB
µ
V (1kHz) 6 VR301 -6dBm -6dBm
±
1dB
(300Hz) 6 NONE NONE -12dBm
±
4dB
(3kHz) 6 NONE NONE -18dBm
±
4dB
4. CD LEVEL SSG Output : 0
➞
+18dB
µ
V 6 NONE NONE CD OUT : High
➞
Low
0 ➞ +2dB
µ
V NONE NONE CD OUT : High ➞ High
SSG Unit
CN101 (H)
(TEL LINE)
CN101 (E)
FM SSG
Mod. : 1kHz
Dev. : 2.5kHz
Loop
Simulator
Power Supply
48VDC 50mA
AC
Voltmeter
Distortion
Meter
600
Ω
R
PARTS LOCATION (BASE)
6
ANT (H)
7 ANT (E)
#
EXP. OUT
9
Rx VCO
8 COMP. OUT
! Tx VCO
4 SPK (H)
5
SPK (E)
% AC
CHECK
1
TEST
$ CD LEVEL
2
MIC (H)
3
MIC (E)
&
PAGE/INT.
KEY
~ DC 12V (–) + DC 12V (+)
SPEAKER KEY
- VCO GND
RINGER SW ON
JIG SW
S001
(
CPT
~
GND
)
CPR
S002
JIG SW
TOGGLE SW
RINGER SW ON
Rx MUTE
OFF
Rx MUTE ON
Tx POWER
ON
Tx POWER
OFF
VR301
(Rx LEVEL)
GND (VCO)
T301 (IF. R)
CD LEVEL
S404
(PAGE/INT
KEY)
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)
CLT-99/SS (S/M) 6 12/1/00, 3:17 PM 7