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RC-550L/LB
Amplifier Alignment
Bias Frequency
Level Alignment of Peak Level Indicator
1. Connect a frequency counter across TP1 & TP2.
1. Supply the signal (1kHz, -6OdBs) to the MIC terminal.
2. Shift the BEAT CUT switch to the lower position.
2. Set the RC-550 in the manual recording mode.
3. Set the RC-550 in the recording mode.
3. Adjust the REC LEVEL control so that the level meter
4. Adjust
L101
so that the frequency
counter
indicates
indicates OVU.
70+0.5kHz
4. Adjust the variable resistor R128 so that the peak level
indicator of "'0"' lights.
Bias Current
1. Connect a V.T.V.M. across TP1 & TP2.
2. Adjust the variable resistor
R168 so that the voltage
becomes 7mV (700uA/102).
Fig. 34
How to Fit Dial Cord
1. Dial Cord
Material : Tetoron
Diameter of cord : 0.6mm (24 mil)
Whole length of cord : 1120mm (44-1/8")
. Take out the chassis of cabinet by removing the tuner circuit board and cassette mechanism.
. Turn the dial drum fully counterclockwise.
. Fit the cord in numerical order as shown in Fig. 35.
Engage 2 projections of dial drum with the slots of arm which is mounted on the shaft of variable capacitor as shown in
Fig. 36, when mounting the tuner circuit board on the chassis.
Own
Tuner
Arm
Circuit Board
No. 1384
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