IC-7800_adj.pdf

《IC-7800_adj.pdf》由会员分享，可在线阅读，更多相关《IC-7800_adj.pdf（52页珍藏版）》请在收音机爱好者资料库上搜索。

1、9 1 PREPARATION BEFORE SERVICING I REQUIRED TEST EQUIPMENT AC outlet RF power meter (terminated type) Frequency counter RF voltmeter FM deviation meter Modulation analyzer Distortion meter Oscilloscope Audio generator Standard signal generator (SSG) Digital multimeter AC millivoltmeter DC voltmeter

2、DC ammeter Spectrum analyzer Attenuator External speaker Terminator EQUIPMENTGREDE AND RANGEEQUIPMENTGREDE AND RENGE Voltage: 85 V265 V Measuring range: 10200 W Frequency range: 1.8100 MHz Impedance: 50 SWR: Less than 1.2 : 1 Frequency range: 0.1100 MHz Frequency accuracy: 0.5 ppm or better Sensitiv

3、ity: 100 mV or better Frequency range: 0.1100 MHz Measuring range: 0.0110 V Frequency range: DC500 MHz Measuring range: 0 to 5 kHz Frequency range: At least 90 MHz Measuring range: 0100 % Frequency range: 1 kHz 10 % Measuring range: 1100 % Frequency range: DC20 MHz Measuring range: 0.0120 V Frequenc

4、y range: 3003000 Hz Measuring range: 1500 mV Frequency range: 0.1100 MHz Output level: 0.1 V32 mV (127 to 17 dBm) Imput impeadance: 10 M/DC or beter Measuring range: 10 mV10 V Input impedance:50 k/V DC or better Measurement capability: 1 A/30 A Frequency range: At least 90 MHz Spectraum bandwidth: 1

5、00 kHz or more Power attenuation: 50 or 60 dB Capacity: 150 W or more Input impedance: 8 Capacity: 5 W or more Resistance: 50 and 150 Capacity: 150 W or more IC-7800 ADJUSTMENT PROCEDURES 10 *This output level of a standard signal generator (SSG) is indicated as SSGs open circuit. 2 OSC UNIT ADJUSTM

6、ENTS REFERENCE OUTPUT REF IN OUTPUT REF OUT OUTPUT ADJUSTMENT ADJUSTMENTADJUSTMENT CONDITION MEASUREMENT VALUE POINT UNITLOCATIONUNITADJUST 1 2 3 Set the OSC unit to the external ref- erence mode on the set mode. MAIN display frequency : 10.000 MHz Connect an SSG to J71 on the OSC unit and set as: F

7、requency: 10.000 MHz Level: 71 mV* (10 dBm) Modulation: OFF Terminates J73 with 50 . Receiving MAIN display frequency : 10.000 MHz Receiving Terminates J72 with 50 . SUB display frequency : 10.000 MHz Receiving Set the OSC unit to the internal ref- erence mode on the set mode. MAIN display frequency

8、 : 10.000 MHz Receiving Terminates J73 with 50 . SUB display frequency : 10.000 MHz Receiving Terminates J72 with 50 . SUB display frequency : 10.000 MHz Receiving OSC OSC OSC Connect an RF volt- meter to the J72. Connect an RF volt- meter to the J72. Connect an RF volt- meter to the J73. Connect an

9、 RF volt- meter to the J71. Connect an RF volt- meter to the J72. Connect an RF volt- meter to the J73. Maximum voltage 0 dBm 3.0 dB 0 dBm 3.0 dB 10.0 dBm 3.0 dB 0 dBm 3.0 dB 0 dBm 3.0 dB OSCL61, L62 Verify Verify Verify Verify Verify 11 3 RX PLL-A UNIT ADJUSTMENTS 40M OUTPUT LPL LOCK VOLTAGE HPL LO

10、CK VOLTAGE (VCO1) (VCO2) (VCO3) (VCO4) (VCO5) (VCO6) (VCO1) (VCO2) (VCO3) (VCO4) (VCO5) ADJUSTMENT ADJUSTMENTADJUSTMENT CONDITION MEASUREMENT VALUE POINT UNITLOCATIONUNITADJUST 1 1 2 1 2 3 4 5 6 7 8 9 10 11 MAIN display frequency : 40.000 MHz Mode: USB Receiving MAIN display frequency : 0.030 MHz Mo

11、de: USB Receiving MAIN display frequency : 7.999 MHz Mode: USB Receiving MAIN display frequency : 7.999 MHz Mode: USB Receiving MAIN display frequency : 14.999 MHz Mode: USB Receiving MAIN display frequency : 21.999 MHz Mode: USB Receiving MAIN display frequency : 29.999 MHz Mode: USB Receiving MAIN

12、 display frequency : 44.999 MHz Mode: USB Receiving MAIN display frequency : 60.000 MHz Mode: USB Receiving MAIN display frequency : 0.030 MHz Mode: USB Receiving MAIN display frequency : 8.000 MHz Mode: USB Receiving MAIN display frequency : 15.000 MHz Mode: USB Receiving MAIN display frequency : 2

13、2.000 MHz Mode: USB Receiving MAIN display frequency : 30.000 MHz Mode: USB Receiving RX PLL-A RX PLL-A RX PLL-A RX PLL-A Connect an RF volt- meter to the CP701 (40MHz). Connect a DC volt- meter to the CP1 (LV1). Connect a DC volt- meter to the CP2 (LV2). Connect a DC volt- meter to the CP2 (LV2). M

14、aximum voltage 2.0 V 0.1 V Less than 3.0 V 6.0 V 0.1 V 6.0 V 0.1 V 6.0 V 0.1 V 6.0 V 0.1 V 6.0 V 0.1 V 6.0 V 0.1 V 1.8 V2.8 V 1.8 V2.8 V 1.8 V2.8 V 1.8 V2.8 V 1.8 V2.8 V RX PLL-A RX PLL-A RX PLL-A L702, L703 C154 Verify C222 C232 C242 C252 C262 C272 Verify Verify Verify Verify Verify 12 RX PLL-A UNI

15、T ADJUSTMENTSContinued HPL LOCK VOLTAGE (VCO6) R1 LO OUTPUT 2LO LOCK VOLTAGE R2 LO OUTPUT T2 LO OUTPUT RX SENSITIVITY (HF) IMAGE RESPONSE ADJUSTMENT ADJUSTMENTADJUSTMENT CONDITION MEASUREMENT VALUE POINT UNITLOCATIONUNITADJUST 12 1 1 1 1 1 2 1 MAIN display frequency : 45.0 MHz Mode: USB Receiving MA

16、IN display frequency : 14.999 MHz Mode: USB Receiving MAIN display frequency : 14.100 MHz Mode: USB Receiving MAIN display frequency : 14.100 MHz Mode: USB Receiving MAIN display frequency : 14.100 MHz Mode: USB Receiving Pre-set the IC-7800 as below condi- tion. MAIN display frequency : 14.150 MHz

17、Mode: USB Dual watch: OFF MAIN Ant.: ANT1 Pre-amp. 1: ON SUB AF: Minimum level Set R1228 to center position. Rotate L1058 to 8.5 turns in clock- wise direction. Rotate L1401 to 2 turns in clock- wise direction. Rotate L1402 to 2 turns in clock- wise direction. Rotate L1403 to 3.5 turns in clock- wis

18、e direction. Rotate L1404 to 3.5 turns in clock- wise direction. Receiving MAIN display frequency : 14.150 MHz Mode: USB Connect an SSG to ANT1 connec- tor and set as: Frequency : 14.1515 MHz Level: 1 V* (107 dBm) Modulation: OFF Receiving MAIN display frequency : 14.150 MHz Mode: USB Connect an SSG

19、 to ANT1 connec- tor and set as: Frequency : 14.0765 MHz Level: 50 mV* (13 dBm) Modulation: OFF Receiving RX PLL-A RX PLL-A RX PLL-A RX PLL-A RX PLL-A RX PLL-A Rear panel Rear panel Connect a DC volt- meter to the CP2 (LV2). Connect an DC volt- meter to the J351 (R1LO). Connect an DC volt- meter to

20、the CP3. Connect a spectrum analyzer to the J831 (R2LO). Connect a spectrum analyzer to the J561 (T2LO). Connect a DC volt- meter to the CP1102. Connect a DC volt- meter to the CP1103. Connect an AC milli- volt meter to the EXT SP jack with 8 load. Connect a spectrum analyzer to the EXT SP jack with

21、 8 load. 1.8 V2.8 V 2.25 dBm 0.25 dB 1.5 V 0.3 V Maximum level (10 dBm 3.0 dB) Maximum level (3.0 dBm 3.0 dB) 4.5 V 0.1 V 4.5 V 0.1 V Maximum audio level Mimimum image RX PLL-A RX PLL-A RX PLL-A RX PLL-A RX PLL-A RX PLL-A RX PLL-A RX PLL-A Verify R357 C546 L801, L834 L565, L566 R1101 R1132 L1408, L1

22、058 R1516, C1656 *This output level of a standard signal generator (SSG) is indicated as SSGs open circuit. 13 RX PLL-A UNIT ADJUSTMENTSContinued RX SENSITIVITY (50 MHz) IF THROUGH (50 MHz) ADJUSTMENT ADJUSTMENTADJUSTMENT CONDITION MEASUREMENT VALUE POINT UNITLOCATIONUNITADJUST 1 1 MAIN display freq

23、uency : 50.020 MHz Mode: USB Pre-amp. 2: ON Connect an SSG to ANT1 connec- tor and set as: Frequency : 50.0215 MHz Level: 0.32 V* (117 dBm) Modulation: OFF Receiving MAIN display frequency : 50.020 MHz Mode: USB Connect an SSG to ANT1 connec- tor and set as: Frequency : 64.455 MHz Level: 50 mV* (13

24、dBm) Modulation: OFF Receiving Rear panel Front panel Connect an AC milli- volt meter to the EXT SP jack with 8 load. S-meter Maximum audio level Mimimum level RX PLL-A RX PLL-A L1222 C1265 *This output level of a standard signal generator (SSG) is indicated as SSGs open circuit. 14 4 RX PLL-B UNIT

25、ADJUSTMENTS 40M OUTPUT LPL LOCK VOLTAGE HPL LOCK VOLTAGE (VCO1) (VCO2) (VCO3) (VCO4) (VCO5) (VCO6) (VCO1) (VCO2) (VCO3) (VCO4) (VCO5) ADJUSTMENT ADJUSTMENTADJUSTMENT CONDITION MEASUREMENT VALUE POINT UNITLOCATIONUNITADJUST 1 1 2 1 2 3 4 5 6 7 8 9 10 11 Dual watch: ON SUB display frequency : 40.000 M

26、Hz Mode: USB Receiving SUB display frequency : 60.000 MHz Mode: USB Receiving SUB display frequency : 1.499 MHz Mode: USB Receiving SUB display frequency : 7.999 MHz Mode: USB Receiving SUB display frequency : 14.999 MHz Mode: USB Receiving SUB display frequency : 21.999 MHz Mode: USB Receiving SUB

27、display frequency : 29.999 MHz Mode: USB Receiving SUB display frequency : 44.999 MHz Mode: USB Receiving SUB display frequency : 60.000 MHz Mode: USB Receiving SUB display frequency : 0.030 MHz Mode: USB Receiving SUB display frequency : 8.000 MHz Mode: USB Receiving SUB display frequency : 15.000

28、MHz Mode: USB Receiving SUB display frequency : 22.000 MHz Mode: USB Receiving SUB display frequency : 30.000 MHz Mode: USB Receiving RX PLL-B RX PLL-B RX PLL-B RX PLL-A Connect an RF volt- meter to the CP701 (40MHz). Connect a DC volt- meter to the CP1 (LV1). Connect a DC volt- meter to the CP2 (LV

29、2). Connect a DC volt- meter to the CP2 (LV2). Maximum voltage 2.0 V 0.1 V Less than 4.0 V 6.0 V 0.1 V 6.0 V 0.1 V 6.0 V 0.1 V 6.0 V 0.1 V 6.0 V 0.1 V 6.0 V 0.1 V 1.8 V2.8 V 1.8 V2.8 V 1.8 V2.8 V 1.8 V2.8 V 1.8 V2.8 V RX PLL-B RX PLL-B RX PLL-B L702, L703 C154 Verify C222 C232 C242 C252 C262 C272 Ve

30、rify Verify Verify Verify Verify 15 RX PLL-B UNIT ADJUSTMENTSContinued HPL LOCK VOLTAGE (VCO6) S1 LO OUTPUT 2LO LOCK VOLTAGE 2LO OUTPUT RX SENSITIVITY (HF) IMAGE RESPONSE ADJUSTMENT ADJUSTMENTADJUSTMENT CONDITION MEASUREMENT VALUE POINT UNITLOCATIONUNITADJUST 12 1 1 1 1 2 1 SUB display frequency : 4

31、5.000 MHz Mode: USB Receiving SUB display frequency : 14.999 MHz Mode: USB Receiving SUB display frequency : 14.100 MHz Mode: USB Receiving MAIN display frequency : 14.100 MHz Mode: USB Receiving Pre-set the IC-7800 as below condi- tion. SUB display frequency : 14.150 MHz Mode: USB Dual watch: ON MA

32、IN Ant.: ANT2 SUB Ant.: ANT1 Pre-amp. 1: ON MAIN AF: Minimum level Set R1228 to center position. Rotate L1401 to 2 turns in clock- wise direction. Rotate L1402 to 2 turns in clock- wise direction. Rotate L1403 to 3.5 turns in clock- wise direction. Rotate L1404 to 3.5 turns in clock- wise direction.

33、 Receiving SUB display frequency : 14.150 MHz Mode: USB Connect an SSG to ANT1 connec- tor and set as: Frequency : 14.1515 MHz Level: 1 V* (107 dBm) Modulation: OFF Receiving SUB display frequency : 14.150 MHz Mode: USB Connect an SSG to ANT1 connec- tor and set as: Frequency : 14.0765 MHz Level: 50

34、 mV* (13 dBm) Modulation: OFF Receiving RX PLL-B RX PLL-B RX PLL-B RX PLL-B RX PLL-B Rear panel Rear panel Connect a DC volt- meter to the CP2 (LV2). Connect an RF volt- meter to the J351 (S1LO). Connect a DC volt- meter to the CP3. Connect a spectrum analyzer to the J561 (2LO). Connect a DC volt- m

35、eter to the CP1102. Connect a DC volt- meter to the CP1103. Connect an AC milli- volt meter to the EXT SP jack with 8 load. Connect a spectrum analyzer to the EXT SP jack with 8 load. 1.8 V2.8 V 2.25 dBm 0.25 dB 1.5 V 0.3 V Maximum level (9.0 dBm 3.0 dB) 4.5 V 0.1 V 4.5 V 0.1 V Maximum audio level M

36、imimum image RX PLL-B RX PLL-B RX PLL-B RX PLL-B RX PLL-B RX PLL-B RX PLL-B Verify R357 C546 L565, L566 R1101 R1132 L1408, L1058 R1516, C1656 *This output level of a standard signal generator (SSG) is indicated as SSGs open circuit. 16 *This output level of a standard signal generator (SSG) is indic

37、ated as SSGs open circuit. RX PLL-B UNIT ADJUSTMENTSContinued RX SENSITIVITY (50 MHz) IF THROUGH (50 MHz) ADJUSTMENT ADJUSTMENTADJUSTMENT CONDITION MEASUREMENT VALUE POINT UNITLOCATIONUNITADJUST 1 1 SUB display frequency : 50.020 MHz Mode: USB Pre-amp. 2: ON Connect an SSG to ANT1 connec- tor and se

38、t as: Frequency : 50.0215 MHz Level: 0.32 V* (117 dBm) Modulation: OFF Receiving SUB display frequency : 50.020 MHz Mode: USB Connect an SSG to ANT1 connec- tor and set as: Frequency : 64.455 MHz Level: 50 mV* (13 dBm) Modulation: OFF Receiving Rear panel Front panel Connect an AC milli- volt meter

39、to the EXT SP jack with 8 load. S-meter Maximum audio level Mimimum level RX PLL-B RX PLL-B L1222 C1265 17 4-5 PA200W BOARD ADJUSTMENTS IDLING CURRENT (For driver) (For final amplifier) ADJUSTMENT ADJUSTMENTADJUSTMENT CONDITION MEASUREMENT VALUE POINT UNITLOCATIONUNITADJUST 1 2 3 Preset R301, R407,

40、R410 on the PA200W unit to max. CCW. MIC gain: max. CCW Main display frequency : 14.100 MHz Mode: USB Apply no audio signals to the MIC connector. Transmitting Transmitting Transmitting PA200WConnect an ammeter between W1 and the transceiver. 1.0 A higher 1.0 A higher 1.0 A higher PA200WR301 R407 R4

41、25 R410 R426 18 6 TUNER UNIT ADJUSTMENT SWR DETECTOR TUNER REFERENCE ADJUSTMENT ADJUSTMENTADJUSTMENT CONDITION MEASUREMENT VALUE POINT UNITLOCATIONUNITADJUST 1 Main display frequency : 24.950 MHz Mode: FM RF POWER: Max. CW (200W) TUNER: Through APC: OFF Connect a 50 terminator to ANT1 connector. Tra

42、nsmitting CTRLConnect a digital multimeter or oscillo- scope to the check point CP101 (REF). Minimum voltageCTRLC104 ADJUSTMENT CONDITIONDISPLAYOPERATION Enter the tuner adjustment mode: q Turn power OFF. w Terminate the REMOTE jack with a 3.5(d) mm mini-plug. e While pushing M.SCOPE and EXIT/SET, t

43、urn power ON. 1 2 3 TUNER-ADJUST MODE - TUNER - Adjusting Now - TUNER - OK Push F-7 (START) to start tuning. Verify the display shows “Adjusting Now”. Verify the display shows “OK”. 19 7 MAIN UNIT ADJUSTMENTS MAXIMUM OUTPUT POWER RESIDUAL AM TX TOTAL GAIN HIGH POWER (HF) (50 MHz) AM CARRIER POWER Id

44、-APC ADJUSTMENT ADJUSTMENTADJUSTMENT CONDITION MEASUREMENT VALUE POINT UNITLOCATIONUNITADJUST 1 2 3 4 1 1 2 1 1 Turn the power OFF Push and hold F-INP and MW, and then turn the power ON. Preset R93 to 3 oclock position. MAIN display frequency : Any Mode: USB Connect an audio generator to the MIC con

45、nector and set as: Frequency : 1.5 kHz Level: 1 mV Transmitting Mode: FM Connect an audio generator to the MIC connector and set as: Frequency : 1.0 kHz Level: 10 mV Transmitting Apply no audio signals to the MIC connector. Transmitting MAIN display frequency : Any Mode: USB MIC GAIN: 12 oclock posi

46、- tion Connect an audio generator to the MIC connector and set as: Frequency : 1.5 kHz Level: 1 mV Transmitting MAIN display frequency : 14.100 MHz Mode: RTTY Transmitting MAIN display frequency : 50.100 MHz Mode: RTTY Transmitting MAIN display frequency : 14.100 MHz Mode: AM Apply no audio signals

47、to the MIC connector. Transmitting MAIN display frequency : 14.100 MHz Mode: RTTY Connect CP81 to GND. Preset R93 to 90 CCW. Transmitting MAIN Rear panel Rear panel Rear panel Rear panel Rear panel PA Connect a digital multimeter or oscillo- scope to the check point CP82. Connect an RF power meter t

48、o the ANT1 connector. Connect an RF power meter to the ANT1 connector. Connect an RF power meter to the ANT1 connector. Connect an RF power meter to the ANT1 connector. Connect an RF power meter to the ANT1 connector. Connect an ammeter between the PA unit and the W1. 0.5 V 0.2 V Maximum output powe

49、r Minimum level differ- ence between an audio generator is ON and OFF. 130 W 200 W 200 W 55 W 12 A MAIN MAIN MAIN MAIN MAIN MAIN MAIN R69 L505 C576 L512 verify C576 R538 R81 R79 R82 R93 20 *This output level of a standard signal generator (SSG) is indicated as SSGs open circuit. 4-8 SCOPE UNIT ADJUSTMENTS S3 LO LOCK VOLTAGE SCOPE SCOP