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SECTION 4 ELECTRICAL ADJUSTMENTS
TEST MODE This set have the test mode function. In the test mode, FM Auto Scan/Stop Level and MW Auto Scan/Stop Level adjustments can be performed easier than it in ordinary procedure. <Set the Test Mode> 1. Set the �power select� switch (S700) is �A (ON) � position. 2. Turn ON the regulated power supply. (All LEDs on the set lights up, and the clock is displayed.)
Note: Press the [OFF] button, if the clock is not displayed.
Procedure: 1. Set to the test mode. 2. Push the [SOURCE] button and set to FM. Display
SHUF
REG
3. 4. 5. 6.
Push the preset [4] button. Push the preset [5] button. Press the preset [1] button for more than two seconds. Then the display indicates all lights, the test mode is set.
3. Adjust with the volume RV2 on TU1 so that the �FM� indication turns to �FM0� indication on the display window. But, in case of already indicated �FM0�, turn the RV2 so that put out light �0� indication and adjustment. Display
SHUF
<Release the Test mode> 1. Push the [OFF] button. 2. Return the �power select� switch (S700) to initially set position.
REG
See the adjustment location from on page 16 for the adjustment.
Adjustment Location: See page 16. FM Stereo Separation Adjustment Setting: [SOURCE] button: FM
FM RF signal generator antenna jack (J1) 0.01 µF set 4� + � level meter
MD SECTION
MD section adjustments are done automatically in this set.
TUNER SECTION
0 dB=1 µV
Cautions during repair When the tuner unit is defective, replace it by a new one because its internal block is difficult to repair.
Carrier frequency Output level Mode Modulation
Note: Adjust the tuner section in the sequence shown below. 1. FM Auto Scan/Stop Level Adjustment. 2. FM Stereo Separation Adjustment. 3. MW Auto Scan/stop Level Adjustment. 4. RDS S-Meter Adjustment.
: 98.0 MHz : 70 dB (3.2 mV) speaker out terminal : stereo : main: 1 kHz, 33.75 kHz deviation (45%) sub: 1 kHz, 33.75 kHz deviation (45%) 19 kHz pilot: 7.5 kHz deviation (10%)
Procedure:
FM Stereo signal generator output channel L-CH R-CH L-CH L-CH R-CH R-CH A B Adjust RV4 on TU1 for minimum reading. C D L-CH Adjust RV4 on TU1 for minimum reading. Level meter connection Level meter reading (dB)
FM Auto Scan/Stop Level Adjustment Setting: [SOURCE] button: FM
FM RF signal generator
antenna jack (J1)
0.01 µF
R-CH
set
Carrier frequency Output level Mode Modulation : 98.0 MHz : 22 dB (12.6 µV) : mono : 1 kHz, 22.5 kHz deviation (30%)
L-CH Stereo separation: A-B R-CH Stereo separation: C-D The separations of both channels should be equal. Specification: Separation more than 30 dB Adjustment Location: See page 16.
� 14 �
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