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4.1.6 Tuner Section
Item AM IF adjustment Measuring Condition Signal input: Loop ANTENNA Signal output: U201 PIN 16 Signal input: Loop antenna PHONES (with 32 ohm Load) Check and adjustment procedure 1.Set the intermediate frequency sweep generator to AM 450 kHz. 2.Adjust the T201 for maximum and center output. Standard value Adjusting part T201 See Fig 3-3
AM tracking adjustment
1.Set the TUNER at 531 kHz adjust T202 until the test pin of R229 Voltage at 1.5V 0.1V. 2.Set the TUNER at 1710 kHz, Check the pin of R229 Voltage at 8.4V 6V. 3.Set theTUNER and S/G at 603 kHz, adjust T204 for maximum output. 4.Set the TUNER and S/G at 1404 kHz, adjust VC201 for maximum output. 5.Repeat the above steps 3 and 4.
T202 T204 R229
VC201
FM Tracking Adjustment
Signal input point: FM-ANT Phones With 32 ohm load
1.Set the Tuner at 87.5MHz adjust L203 until the test pin of R230 voltage at 2.4V 0.1V 2.Set the Tuner at 108MHz. Check the pin of R230 voltage at 8 0.8V 3.Set the Tuner and S/G at 90.1MHz. Adjust L204 for maximum output. 4.Set the Tuner and S/G at 106.1MHz. Adjust VC 202 for maximum output. 5.Repeat the above step 3 and 4
