Aiwa NSX-SZ900 Service Manual page 38

2) Connect the output from the generator to the attenuator and connect the AUX from the set to the attenuator.
3) Insert the tape (TTA-602) into DECK 2 and record the 1 kHz signal from AUX.
4) At this time, adjust the attenuator until TP8 and TP9 output levels become 21 mV.
5) Record 1 kHz and 10 kHz alternately.
6) Adjust SFR351 (Lch)/SFR352 (Rch) until the playback output level of 10 kHz is within 0.5 ± 0.5 dB
according to the standard when the playback output level of 1 kHz is used as the standard.
8. Checking REC/ PB Frequency Response (DECK 2)
Requirements
• Measuring Devices: Same as 7
Test Tape: TTA-615 (CrO2)
Test Point: TP8 (Lch) , TP9 (Rch)
Input Point: AUX (1 kHz/10 kHz)
1) Connect CH1 of the millivoltmeter to TP8 (Lch) and CH2 of the millivoltmeter to TP9 (Rch).
2) Connect the output from the generator to the attenuator and connect the AUX from the set to the attenuator.
3) Insert the tape (TTA-602) into DECK 2 and record the 1 kHz signal from AUX.
4) At this time, adjust the attenuator until the TP8 and TP9 output levels become 21 mV.
5) Record 1 kHz and 10 kHz alternately.
6) Check the output level of 10 kHz is within ± 2.5 dB according to the standard when the playback output
level of 1 kHz is used as the standard.
9. Checking REC/ PB Sensitivity (DECK 2)
Requirements
• Measuring Devices: Millivoltmeter, Audio Signal Generator (Low Frequency Generator), Attenuator
Test Tape: TTA-602 (NORMAL)
TTA-615 (CrO2)
Test Point: TP8 (Lch) , TP9 (Rch)
Input Point: AUX (1 kHz)
1) Connect CH1 of the milivoltmeter to TP8 (Lch) and CH2 of the millivoltmeter to TP9 (Rch).
2) Connect the output from the generator to the attenuator and connect the AUX from the set to the attenuator.
3) Insert the tape (TTA-602) into DECK 2 and record the 1 kHz signal from AUX.
4) At this time, adjust the attenuator until the TP8 and TP9 output levels become 210 mV.
5) Playback 1 kHz and check that the output level during playback and the output level during recording are within ± 2.5 dB.
6) Insert the test tape (TTA-615) into DECK 2, perform 3) to 5) and check that it is within ± 3 dB.
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AC MILLIVOLTMETER
CH1 CH2
TP8
TP9