Samsung RCD-M70, Руководство по обслуживанию

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1-2 Samsung Electronics
1-1-1 Test Equipment
1-1-2 Pre-Adjustment
1-1-3 AM Adjustment
1. AM Standard Signal Generator (S.S.G) : 400Hz, 30% MOD
2. Oscilloscope
3. VTVM
4. Frequency counter
5. Loop antenna
6. Dummy load (3
Ω )
7. DC voltmeter
1. Check the source voltage
2. Press TUNER/BAND to select the AM(MW) function.
3. Set the EQ/S.BASS control to OFF position.
4. Set the volume control to approximaterly 50mw
Intermediate
frequency (IF)
adjustment
AM frequency
coverage
adjustment
AM tracking
adjustment
Figure 1-4
Connect DC voltmeter to AM
VT(OR10) and GND
1
2
4
5
3
Figure 1-5
Figure 1-5
450 KHz
594 KHz
Figure 1-4
SET
60 cm
AM Signal
Generator
Test Loop
Antenna
Speaker
Terminal
VTVM
IN
OUT
GND
Oscilloscope
AM-ANT
Figure 1-5
SET
AM VT(OR10)
GND
Input
DC Voltmeter
594 KHz MW-ANT
-
- - -
OCT2
1611KHz
-
-
522 KHz
522 KHz
IT 2
OT 1 1.0V
Maximum output
Maximum output
4.6V
Non Adjust
Remark FREQ. Setting Adjust. Point SSG.FREQ. Item
Step
Connection
Alignment and Adjustments
Dummy Load(3
Ω )
1-1-4 MW/LW
Intermediate
frequency (IF)
adjustment
MW frequency
coverage
adjustment
MW tracking
adjustment
Fig 1-4
1
2
4
5
3
Fig 1-5
594 KHz
594 KHz
MW ANT
COIL
-
OCT2
-
-
LW ANT
COIL
OT1 1.0V(LOW)
Maximum output
Maximum output
Remark
FREQ. Setting Adjust.
Point
SSG.FREQ.
Item Step
Connection
522 KHz
4.6V(HIGH)
1611 KHz
1404 KHz
-
NON Adjust
6
Fig 1-4
-
144 KHz
OT2 0.7V(LOW)
-
290 KHz OCT4 3.1V(HIGH)
LW frequency
coverage
adjustment
7
9
8
LW tracking
adjustment
Fig 1-5
170KHz
170 KHz
270KHz
-
-
Fig 1-5
450 KHz 522 KHz IT2
Maximum output
NON Adjust