IC-910H Service manual.pdf - N3UJJ
IC-910H Service manual.pdf - N3UJJ IC-910H Service manual.pdf - N3UJJ
• CR-293 HIGH STABILITY CRYSTAL UNITq Remove the bottom cover as shown in the diagram onp. 3-1.• Remove the UX-910 if you have installed it. (p. 3-1)w Remove 6 screws from the PLL shield cover, then lift upthe PLL shield cover.y Install the CR-293 and solder the leads.u Return the PLL unit, PLL shield cover and bottom coverto their original positions.Original crystal soldering pointPLL shieldcoverCR-293 solderingpointse Disconnect the FFC (Flexible Flat Cable) from the DIS-PLAY unit and the connection cable connectors fromJ501 and J1051 on the MAIN unit.r Remove 5 screws from the PLL unit, then lift up the PLLunit.t Unsolder the original reference crystal, then remove it.• The original reference crystal unit is soldered at both topand bottom sides of the PCB (Printed Circuit Board).Unsolder theoriginalcrystal.CR-293Original crystalJ501J1051Flexible flat cable3 - 4From The N3UJJ.COM Document Library
- Page 1 and 2: SERVICEMANUALVHF/UHF ALL MODE TRANS
- Page 3 and 4: TABLE OF CONTENTSSECTION 1SPECIFICA
- Page 5 and 6: ■ RECEIVER• Receive system :VHF
- Page 7 and 8: • PA UNITTX/RX switching relay(RL
- Page 9 and 10: SECTION 3DISASSEMBLY AND OPTION INS
- Page 11: • UT-102 VOICE SYNTHESIZER UNITq
- Page 15 and 16: 4-1-11 NOISE BLANKER CIRCUIT (MAIN
- Page 17 and 18: low-pass filter and UHF signal are
- Page 19 and 20: SECTION 5ADJUSTMENT PROCEDURES4-1 P
- Page 21 and 22: • PLL AND MAIN UNITSR57030.2 MHz
- Page 23 and 24: • PA UNIT144M receiverpeak/gainad
- Page 25 and 26: • PA UNIT430M peakadjustmentfor m
- Page 27 and 28: • PA UNITP501RF peakpre-setting f
- Page 29 and 30: • MAIN UNITR202Drive leveladjustm
- Page 31 and 32: SOFTWARE ADJUSTMENT (continued)ADJU
- Page 33 and 34: SOFTWARE ADJUSTMENT (continued)ADJU
- Page 35 and 36: SOFTWARE ADJUSTMENT (continued)ADJU
- Page 37 and 38: CP321Idling check pointCP322Idling
- Page 39 and 40: R67APC adjustmentCP401APC check poi
- Page 41 and 42: [DISPLAY BOARD]REF ORDERNO. NO.DESC
- Page 43 and 44: [RIT BOARD]REFNO.ORDERNO.R2 7210003
- Page 45 and 46: [PLL UNIT]REF ORDERNO. NO.DESCRIPTI
- Page 47 and 48: [PLL UNIT]REF ORDERNO. NO.DESCRIPTI
- Page 49 and 50: [MAIN UNIT]REF ORDERNO. NO.DESCRIPT
- Page 51 and 52: [MAIN UNIT]REF ORDERNO. NO.DESCRIPT
- Page 53 and 54: [MAIN UNIT]REF ORDERNO. NO.DESCRIPT
- Page 55 and 56: [MAIN UNIT]REFNO.ORDERNO.DESCRIPTIO
- Page 57 and 58: [PA UNIT]REF ORDERNO. NO.DESCRIPTIO
- Page 59 and 60: [PA UNIT]REF ORDERNO. NO.DESCRIPTIO
- Page 61 and 62: [PA UNIT]REF ORDERNO. NO.DESCRIPTIO
• CR-293 HIGH STABILITY CRYSTAL UNITq Remove the bottom cover as shown in the diagram onp. 3-1.• Remove the UX-910 if you have installed it. (p. 3-1)w Remove 6 screws from the PLL shield cover, then lift upthe PLL shield cover.y Install the CR-293 and solder the leads.u Return the PLL unit, PLL shield cover and bottom coverto their original positions.Original crystal soldering pointPLL shieldcoverCR-293 solderingpointse Disconnect the FFC (Flexible Flat Cable) from the DIS-PLAY unit and the connection cable connectors fromJ501 and J1051 on the MAIN unit.r Remove 5 screws from the PLL unit, then lift up the PLLunit.t Unsolder the original reference crystal, then remove it.• The original reference crystal unit is soldered at both topand bottom sides of the PCB (Printed Circuit Board).Unsolder theoriginalcrystal.CR-293Original crystalJ501J1051Flexible flat cable3 - 4From The <strong>N3UJJ</strong>.COM Document Library
Change language