TUNER ADJUSTMENTS
•Use a plastic screw driver for adjustments.
•MODE : ST (Stereo)
•Speaker impedance : 4 ohm
•TUNING
FM : 87.5 - 108MHz
MW: 522 - 1611kHz
LW : 144 - 288kHz
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| Standatd Input: 60dB |
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| Antenna | : 75 unbalanced , Modulation : 1 kHz |
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1. FM |
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| Dev. | : ±22.5kHz(MONO) | 22.5kHz(STEREO) ±6.75kHz(PILOT) | ||||||
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Step |
| Adjusting |
| Connection |
| SG | Set |
| Adjustment |
| Remark | |
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| Circuit | Input |
| Output |
| Frequency | Position |
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1 |
| IF(0V) | 98.0MHz.Input Level |
| Alignment voltage IC231 |
| 98MHz | Low |
| XF233 |
| Alignment voltage IC231 |
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| Adjustmen |
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| FM Antenna SG=66dBμV |
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2 |
| Cover |
| Connect Digital DC voltmeter to |
| 87.5MHZ | Low |
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| 1.4±0.05V | ||
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| Voltage |
| TP11(H), TP12(E). |
| 108.0MHZ | High |
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| 6.8±0.5V | ||
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| SG Modulation | : 1kHz, 30% |
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2. MW |
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| Antenna, IRE Loop, Distance : 60 cm |
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Step |
| Adjusting |
| Connection |
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| SG | Set | Adjustment | Remark | |
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| Circuit | Input |
| Output |
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| Frequency | Position |
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1 |
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| Connect Sweep generator to test |
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| 450kHz |
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| IF |
| point TP13(L)or TP14(R) and TP15(E). |
| (at 999kHz) | Low | T2002 | AF Maximum | ||
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2 |
| Cover |
| Connect Digital DC voltmeter to |
| 522kHZ | Low | L2153 | 1.00±0.05V | ||
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| Voltage |
| TP11(H )and TP12(E). |
| 1611kHZ | High | 6.70±0.10V | |||
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3 |
| Tracking | Connect AM SG to |
| Connect to VTVM |
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| 603KHZ | Low | L2151 | AF Maximum |
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| Test loop Ant. |
| point TP13(L)or TP14(R) and TP15(E). |
| 1404kHZ | High | CT252 | ||
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3. LW |
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Step |
| Adjusting |
| Connection |
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| SG | Set | Adjustment | Remark | |
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| Circuit | Input |
| Output |
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| Frequency | Position |
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1 |
| Cover |
| Connect Digital DC voltmeter to |
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| 144kHZ | Low | L2154 | 1.00±0.05V | |
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| Voltage |
| TP11(H) and TP12(E). |
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| 288kHZ | High | 5.42±0.10V | ||
2 |
| Tracking | Connect AM SG to |
| Connect to VTVM |
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| 162kHZ | Low | L2152 | AF Maximum |
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| Test loop Ant. |
| point TP13(L)or TP14(R) and TP15(E). |
| 279kHZ | High | CT251 | ||
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