Teac CT-W3250S-1, Руководство по обслуживанию

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16.17.
LM358N:
16.17.1.
General Description
The LM158 series consists of two independent, high gain, internally frequency compensated operational amplifiers
which were designed specifically to operate from a single power supply over a wide range of voltages. Operation from
split power supplies is also possible and the low power supply current drain is independent of the magnitude of the power
supply voltage. Application areas include transducer amplifiers, dc gain blocks and all the conventional op amp circuits,
which now can be more easily implemented in single power supply systems. For example, the LM158 series can be
directly operated off of the st5V power supply voltage, which is used in digital systems and will easily provide
the required interface electronics without requiring the additional
±15V power supplies.
16.17.2.
Unique Characteristics
In the linear mode the input common-mode voltage range includes ground and the output voltage can also swing to
ground, even though operated from only a single power supply voltage.
The unity gain cross frequency is temperature compensated.
The input bias current is also temperature compensated.
16.17.3.
Advantages
Two internally compensated op amps
Eliminates need for dual supplies
Allows direct sensing near GND and V
OUT
also goes to GND
Compatible with all forms of logic
Power drain suitable for battery operation
Pin-out same as LM1558/LM1458 dual op amp
16.17.4.
Features
Available in 8-Bump micro SMD chip sized package, Internally frequency compensated for unity gain n Large dc
voltage gain: 100 dB
Wide bandwidth (unity gain): 1 MHz (temperature compensated)
Wide power supply range:
— Single supply: 3V to 32V
— or dual supplies:
±1.5V to ±16V
Very low supply current drain (500 µA) — essentially independent of supply voltage
Low input offset voltage: 2 mV
Input common-mode voltage range includes ground
Differential input voltage range equal to the power supply voltage
Large output voltage swing: 0V to V
+
þ 1.5V
17. AK33 CHASSIS MANUAL ADJUSTMENTS PROCEDURE
In order to enter the service menu, first enter the installation menu and then press the digits 4, 7, 2 and 5
respectively.
For ADJUST settings:
Select
Adjust using or button and press or button to enter it. To select different adjust parameters, use or button.
To change the selected parameter, use or button.
WHITE BALANCE ADJUSTMENT:
The following three parameters are used to make white balance adjustment. To do this, use a Colour Analyser.
Using white point RED, white point GREEN and white point BLUE parameters, insert the + sign in the square
which is in the middle of the screen.
ADJUST 00 = White Point RED
ADJUST 01 = White Point GREEN
ADJUST 02 = White Point BLUE
AGC ADJUSTMENT:
In order to do AGC adjustment, enter a 60dBmV RF signal level from channel C-12.
Connect a digital voltmeter to pin 1 of the tuner. Change the AGC parameter until you see 3.70VDC on voltmeter
display. Check that picture is normal at 90dBmV signal level.
ADJUST 03 = AGC
IF-PLL NEGATIVE ADJUSTMENT (Only with PLL tuner):