Sony icf m 350 v service manual
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Extracted text from sony icf m 350 v service manual (Ocr-read)
Page 1
Ð 2 Ð ¥ FM/TV Tracking Adjustment ¥ Repeat the procedures in each adjustment several times, and the tracking adjustments should be finally done by the trimmer ca- pacitors. ¥ Remove FM antenna in FM adjustment. AM IF ADJUSTMENT Adjust for a maximum reading on level meter T1 450 kHz AM VT VOLTAGE ADJUSTMENT Adjustment Part Frequency Display Reading on Digital Voltmeter L2 530 kHz 1.5 ± 0.1 V Confirmation 1,710 kHz 7 to 9 V AM TRACKING ADJUSTMENT Adjust for a maximum reading on level meter L1 590 kHz CT1 1,490 kHz FM IF ADJUSTMENT Adjust for a maximum reading on level meter T201 10.7 MHz FM VT VOLTAGE CONFIRMATION Frequency Display Reading on Digital Voltmeter Confirmation TV 2CH 0.9 ± 0.2 V Confirmation 108 MHz 9 to 11.5 V FM TRACKING ADJUSTMENT Adjust for a maximum reading on level meter L203 TV 2CH CT202 108 MHz TV VT VOLTAGE CONFIRMATION Frequency Display Reading on Digital Voltmeter Confirmation Weather 2CH 0.7 ± 0.2 V Confirmation TV 13CH 9.5 to 11.5 V TV TRACKING ADJUSTMENT Adjust for a maximum reading on level meter L202 Weather 2CH CT201 TV 13CH Adjustment Location: MAIN and KEY board (See page 3) 1. ELECTRICAL ADJUSTMENTS 0 dB=1 mV [AM] Setting: BAND: AM ¥ AM IF Adjustment ¥ AM VT Voltage Adjustment ¥ AM Tracking Adjustment [FM/TV] Setting: BAND: FM, TV or Weather ¥ FM IF Adjustment ¥ FM/TV VT Voltage Confirmation AM RF signal generator 30% amplitude modulation by 400 Hz signal Output level: as low as possiblePut the lead-wire antenna close to the set. +– level meter set 4 W MAIN board TP2 (GND) MAIN board TP14 (DET OUT) digital voltmeter 100 k W TP13 (AM VT) TP2 (GND) + – MAIN board AM RF signal generator 30% amplitude modulation by 400 Hz signal Output level: as low as possiblePut the lead-wire antenna close to the set. +– level mete r set 4 W MAIN board TP (SP –) MAIN board TP (SP +) FM RF signal generatorKEY board TP204 (FM IF) KEY board TP119 (GND) 22.5 kHz frequency deviation by 400 Hz signal Output level: as low as possible +– level meter MAIN board TP (SP –)MAIN board TP (SP +) set 4 W 0.01 µF digital voltmeter 100 k W TP118 (FM VT) TP119 (GND) + – KEY board FM RF signal generatorKEY board TP202 (FM/TV IN) KEY board TP201 (GND) 22.5 kHz frequency deviation by 400 Hz signal Output level: as low as possible +– level meter MAIN board TP (SP –)MAIN board TP (SP +) set 4 W 0.01 µF
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ICF-M350V Ð 3 ÐÐ 4 Ð Ð 5 Ð 2-1. BLOCK DIAGRAM 2. DIAGRAMS Adjustment Location: D205L204 TV OSC D206 L205 FM OSC 1 5 BAND-PASS FILTER BPF201 ANT1 FM/TV TELESCOPIC ANTENNA TV RF AMP FM RF AMP TV IN FM IN + 15TV RF 14FM RF 12FM OSC 11FM OSC 9MIX OUT BUFFER IF AMP TV OSC FM OSC 8 IF OUT 6 MODE SW MODE SWITCH D203 L202 TV RF CT201 CT201, L202 TV TRACKING D204 L203 FM RF CT202 CT202, L203 FM TRACKING T201 MIX IFT FM IF FM/TV RF AMP, OSC, MIX, IF AMP IC201 LEVELSHIFT Q105 LEVELSHIFT Q102 24 23 TV LOCAL IN FM LOCAL IN 25 AM LOCAL IN 39 FM/TV BAND SELECT SWITCH Q203, 204 AM FRONT-END 11 15 IF OUT AM RF IN AM OSC AM FRONT-END IC1 (2/2) D2 CT1 L1 AM FERRITE-ROD ANTENNA AM TRACKING CT1, L1 FREQUENCY COVERAGE L2 AM OSC AM IF T1 AM IFT CF1 450kHz 17 3 CF4 IF AMP Q201 CF201 10.7MHz CF2 10.7MHz 18 FM IF AMP FM IF AMP TUNING METER FM DISCRIMI- NATOR + 20METER 16 BAND AM IF IN FM DISCRI FM IF IN 24 DET HIGH-CUT MUTEQ2 25 Q1 TV/MW. FM 20 BEEP 27 PD OUT 19 MUTE AF POWER AMP 28 AF OUT AF IN 9 REG OUT TU B+ FM/AM IF AMP, DET, AF AMP IC1 (1/2) 4 5 NF VOL VOLRV1 MUTING Q3 J52 v (EARPHONE) SP51 (SPEAKER) 36 COMPARATOR IC51 (2/2) BATTERY CHECK IC51 (1/2) TU B+ MW/FM. TV LOW-PASS FILTER Q101, 103, 104 DC/DC CONVERTER Q106, 107, T101 B+ SWITCH (FOR FM/TV) Q202, 205 2.4V (FM/TV) Q206 +2.4V REGULATOR IC53 4.5V B+ SWITCHQ55 38 RADIO POWER ON/OFF B+ SWITCHQ56 +3V REGULATOR IC52 3V D52 – + DC IN 4.5V DRY BATTERYSIZE AA (IEC DESIGNATION R6) 3PCS. 4.5V POWER ON/OFFCONTROL Q54 29 RESET SIGNALGENERATOR IC102 D104 8 – 1, 56 – 51 LCD3 - LCD16 14 – 12 COM1 - COM3 44 – 42 KEY SCAN0- KEY SCAN2 48 – 45 KEY RET0- KEY RET3 LIQUID CRYSTAL DISPLAYLCD101 KEY MATRIX S101-112 S103 5 S1021 S109 – S112+ S1083 S1052 S101 CLOCK/ ENTER S104 ALARM S107 BAND/STANDBY S110 KEY PROTECT S102, 103, 105, 108, 111 PRESET TUNING TIME SET S1114 S106 POWER TUNE/ TIME SYSTEM CONTROLLER, LCD DRIVER, KEY CONTROL IC101 - SIGNAL PATH : TV : FM : AM 6 05 J51 CE L1 CT1 L2 AM VT Voltage Adjustment T1 AM IF Adjustment – MAIN BOARD (Component Side) – ü ï ý ï þ AM Tracking Adjustment TP (SP–) – MAIN BOARD (Conductor Side) – TP (SP+) TP13 (AM VT)TP2 (GND) TP14 (DET OUT) TP202 (FM/TV IN) – KEY BOARD (Component Side) – TP201 (GND) TP204 (FM IF) TP119(GND) TP118 (FM VT) CT202 ü ý þ – KEY BOARD (Conductor Side) – L203 FM Tracking Adjustment T201 FM IF Adjustment L202 ü ý þ CT201 TV Tracking Adjustment