Cambridge-640R-sur-sm维修电路原理图.pdf

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1、Gallery Court Hankey Place London SE1 4BB UK - Tel: +44 (0)20 7940 2200 Fax: +44 (0)20 7940 2233 AP21900/1 640R Issue Date: 21st May 2007 SERVICE MANUAL SPECIFICATIONS: Audio Recording Video Outputs 1 Composite, 1 S-Video Power Output 2 x 120 watts rms per channel 8 ohms (two channels driven) Other

2、Connections 1 ” / 6.35mm Headphone Output (32 to 600 ohms recommended) 7 x 100 watts rms per channel 1 Control Bus Input / Output 8 ohms (all 7 channels driven) 1 IR Emitter In 1 RS232C Total Harmonic Distortion 0.006% 1kHz 1 IEC type mains inlet Crosstalk 90dB A weighted Standby Power Consumption 1

3、0w Audio Input Impendence / Sensitivity 47kOhms / 175mV or greater Quiescent Power Consumption 70w Digital Input Impendence 75ohms (Coaxial / SPDIF) Max Power Consumption 1400w Tone Control Bass +/- 10dB 100Hz Dimension H x W x D 150 x 425 x 420mm Treble +/-10dB 10kHz (Inc all terminals 1IN/LOW;2IN)

4、 32 SCLK 33 SDATA 34 DAC TEST 35 GND 36 Y OUT 37 DAC2 38 DAC1 39 Y IN 40 DAC VCC(5V) 41 UV / Cb Cr SW 43 fsc OUT 44 1HDL CONT 45 C VCC (5V) 42 SECAMCONT 46 B-Y/Cb OUT 47 R-Y/Cr OUT 48 IC10 TA1270BF R-Y CLAMP DET 1 R-Y TO CCD 2 B-Y TO CCD 3 R-Y AGC DET 4 VCC 5 FILTER ADJ 6 S.C.P IN 7 B-Y AGC DET 8 PL

5、L DET 9 CLOCK 10 CLOCK IN 11 VEE 12 VIN1 13 VDD 14 VIN2 15 VOUT2 16 VOB2 17 VOB1 18 VOUT1 19 VGG 20 GND 21 R-Y FROM CCD 22 B-Y FROM CCD 23 NODE SW1 24 NODE SW2 25 B-Y IN 26 R-Y IN 27 B-Y CLAMP DET 28 B-Y OUT 29 R-Y OUT 30 IC14 TA8772AN C111 104 VGND C80 47/10 C196 103 VGNDVGND VGND C116 104 C115 104

6、 C52 10/25 R212 1K VGNDVGND C114104 VGND C113 104 R211 11K VGNDVGND C112 104 C79 47/10 C195 103 VGNDVGND Q12C3361 VGNDVGND Q11 C3361 VGND VGND R2091K R210 1K VGND VGND R208 10K C108104 C107104 C106104 X14.43MHz C213 12P VGND C212 12P X23.58MHz C215 12P VGND C214 12P C217 222 R181 30K VGND C100104 C2

7、19225 C101104 C221223 R1833K C220225 VGND X3503.5KHz R184360 R193 3.3K R194 6.8K VGND C77 47/10 C103 104 V+9V C102 104 VGND C97104 C96104 C95104 VGND C94104 C93104 C92104 R10810K R6975 R6875 VGND R10710K VGND JP2DEL JP1DEL Q20 C3361 VGND R1974.7K R20256K R18256K RX -V750 R.T.A.B.G.L Only C90104 C89

8、104 C91 104 C68 470/6.3 VGND VDD2 1 BIAS 2 VRT 3 NC 4 AIN 5 VRB 6 VDD3 7 VSS2 8 NC 9 VDD4 10 SDATA 11 SCLK 12 TEST 13 KILLER 14 CKIN 15 NC 16 FIL 17 VDD1 18 VSS1 19 COUT 20 NC 21 DAVRB 22 DAVRT 23 YOUT 24 IC9 TC90A49F C192103 C193103 C191 103 C67 47/10 C88 104 C198180P C194 103 R67 820 C65 47/10 C84

9、 104 VGNDVGND C66 47/10 C85 104 VGNDVGND C73 47/10 C98 104 VGNDVGND C190103 C189103 VGND VGND C99 104 Q10 C3361 Q9 C3361 R101 820 R102 680 L13 15uH C199 15P C203 33P R104 2.2K VGND R100 820 R103 680 L14 15uH C200 15P C204 33P R105 2.2K VGND R106 10K C211 12P VGND L4 FB L3 FB VGND V +5V C-Y OUT C-Pr

10、OUT C-Pb OUT V +9V R195 0 C69 47/10 C7047/10 C7147/10 Y TO YC-YUV C TO YC-YUV DATAI/O YC - Y OUT YC - C OUT Q5 14 Q6 13 Q7 12 Q1 4 Q2 5 Q3 6 Q4 7 Q8 11 QS 9 CS 10 CLK 3 SDA 2 STR 1 OE 15 VDD 16 VSS 8 IC11 TC4094BFN Q5 14 Q6 13 Q7 12 Q1 4 Q2 5 Q3 6 Q4 7 Q8 11 QS 9 CS 10 CLK 3 SDA 2 STR 1 OE 15 VDD 16

11、 VSS 8 IC12 TC4094BFN C78 47/10 C109 104 R218 10 DGND C105 104 Selector CON-A Selector CON-B Selector CON-C Selector YUV-A Selector YUV-B OSD DET REC 1 CON OSD CS S-Video-CON P/N C162 105 R131 47 R134 1K VGND R1321K R135 10K R133 56K R136 10K VGND R110 10K C76 47/10 R109 10K VGND C165 105 C166 105 C

12、167 105 C223474 C222 474 C224 474 C225 474 C218224 L5 FB L6 FB L2 FB L1 FB YUV OFF D+5V R139 10 R138 10 DGND C86 104 VGND C87 104 VGND STATUS Zone CON C Zone CON A Zone CON B Q5 14 Q6 13 Q7 12 Q1 4 Q2 5 Q3 6 Q4 7 Q8 11 QS 9 CS 10 CLK 3 SDA 2 STR 1 OE 15 VDD 16 VSS 8 IC13 TC4094BFN C104 104 DGND YUV

13、OUT CON MUTE B MUTE A Video-CON - 2 + 3 1 V- 4 IC7A TK15420MTL-G R164 2K R165 3.9K VGND - 6 + 5 7 V+ 8 IC7B TK15420MTL-G R1622K R163 10K VGND C60 104 VGND C59 104 VGND R174 22K VGND R175 22K VGND C74 47/10 R160 2.2 C75 47/10R161 2.2 V -5V C25 105 ? Q34 C3361 R196 del OSD CV INPUT R2630 VGND Zone 2 L

14、OUTZone 2 ROUT IR to MICRO VOL C OUT VOL SR OUTVOL LB OUT VOL SL OUT BUF FL OUTBUF FR OUT VOL RB OUTVOL SW OUT 6CH RS IN6CH LB IN 6CH LS IN 6CH SW IN6CH RB IN OSD-SCLK VIDEO I2C CLK DATAI/O VIDEO 4094 STR VIDEO 4094 CLK VIDEO 4094 SDA MCU+5V A-15V A+15V DGND AGND CD R INCD L IN REC2/LOUTREC2/ROUT 6C

15、H FL IN6CH FR IN 6CH C IN 12 34 56 78 910 1112 1314 1516 1718 1920 2122 2324 2526 2728 2930 3132 3334 3536 3738 3940 4142 4344 4546 4748 4950 5152 5354 5556 CN528P2.0*2B90 D+5V VGND - 2 + 3 1 V- 4 IC8A 2068 - 6 + 5 7 V+ 8 IC8B 2068 C271105 AGND C272105 AGND 1 2 CE CE G1 G2 3 4 L R L R G1 G2 JK5 AV4-

16、8.4-13/EC C128 104 AGND CD R IN CD L IN REC2/LOUT REC2/ROUT C20 330P R12 220 C19 330P C18 330P C17 330P R11 220 R10 470 R9 470 Q36 C3326 R266 15K Q37 C3326 R265 15K AGND REC2 MUTE Zone 2 MUT Zone Video C Zone Video A Zone Video B A-15V A+15V C32105 R328 47K R327 47K AGND AGND BY PASS /OSD SELECT R22

17、84.7K R221 2.7K R222 2.7K Video-CON2 BY PASS /OSD SELECT-2 1 2 3 4 CN11 4P(2.0) DGND 4094-SDA 4094-CLK 4094-STR GND TO HDMI BOARD A-BUS IR in To enhance viewing, please print to A321 Cambridge Azur 640R AV Receiver Optical Board Circuit Diagram 1 2 3 P11 JSR1162-002 1 2 3 P12 JSR1162-002 1 2 3 P13 J

18、SR1162-002 1 2 3 P14 JSR1162-002 1 2 3 P15 JSR1162-002 12 14 IC42A 74HCU04D 34 IC42B 74HCU04D 56 IC42C 74HCU04D 98 IC42D 74HCU04D 1110 IC42E 74HCU04D 1312 7 IC42F 74HCU04D L26 FB L27 FB L28 FB L23 FB L24 FB C289 104 C290 104 C291 104 C292 104 C293 104 C286 104 C285 104 R286 75 R289 75 R288 75 R290 7

19、5 R292 75 R291 75 R285 75 C287 104 C294 100/10 1 2 3 P8 JST1164 OPTICAL IN 1 2 3 P9 JST1164 OPTICAL OUT L29 FB L30 FB L31 FB DGND2 DGND2 DGND2 DGND2 DGND2 DGND2 DGND2 DGND2 DGND2 DGND2 TO COAXIAL BOARD R294220 R295220 R297220 R298 220 R296220 +5V REC1 OUT REC2 OUT VIDEO1 IN VIDEO2 IN REC1 IN DVD IN

20、CD IN REC1 OUT REC2 OUT VIDEO1 IN VIDEO2 IN REC1 IN DVD IN CD IN 1 2 3 4 5 6 7 8 9 10 11 CN10 11P(2.0) ? ? ? ? ? 1 2 3 4 5 CN15 5P(2.0) 1 2 3 CN18 3P(2.5) MCU+5V GND D+5V 1 2 3 4 5 6 7 8 9 10 11 12 13 CN13 1*13P2.0(90) 1 2 3 CN12 3P(2.0) OPT-IN GND D+5V 1 2 3 CN17 3P(2.5) MCU+5V GND D+5V ? ? ? ? ? 1

21、 2 3 4 5 CN16 5P(2.0) S-VIDEO_C S-VIDEO_Y VIDEO GND GND GND 1 2 3 4 5 6 CN14 6P(2.0) R IN GND L IN 1 2 3 4 5 6 CN19 2*3P2.0(90) AV3-Lin AGND AV3-Rin VGND AV3-Vin VGND AV3-Yin VGND AV3-Cin VGND D+5V DGND OPT-in CONNECT BOARD TO COXA BRDTO OSD BRDTO AMP BRD TO UPDA BRD TO HDMI BRD TO DEOCDE BRD TO DEO

22、CDE BRD TO AV3 BRD To enhance viewing, please print to A322 Cambridge Azur 640R AV Receiver Video / Co-axial - Optical PCB Board Layout (Top Side) To enhance viewing, please print to A323 Cambridge Azur 640R AV Receiver Video - Co-axial - Optical PCB Board Layout (Bottom Side) To enhance viewing, pl

23、ease print to A324 Cambridge Azur 640R AV Receiver Power Amplifer 1 Circuit Diagram Q17 C2705 Q13 C2240 Q9 A970 Q8 A970 R50 220 R26 5.6K/0.25W R45 1.5K1% R74 2.2K1% R49 220 R72 100 C30 20P C15 12P R21 47K R42 470K R39 8.2K R6 1.5K R33 1.8K R36 1K R69 1.2K R31 1.8K C12 122M C9 47P C6 102M R20 47K R15

24、 820 R12 100K Q3 C2878 R9 6.8K R27 5.6K/0.25W C26 102 R64 2.2K R55 22K R63 2.2K R56 22K Q12 C2240 C23 2.2U/50V/NP R57 22K R5 1.5K C3 10UF/16V C18 100UF/10V C21 47UF/50V D4 1N4148 D8 1N4148 D9 1N4148 +B OUT -E +E Feed back B C E -B OUT Q16 C2705 Q11 C2240 Q5 A970 Q4 A970 R46 220 R23 5.6K/0.25W R43 1.

25、5K1% R73 2.2K1% R47 220 R70 100 C28 20P C13 12P R17 47K R40 470K R37 8.2K R2 1.5K R29 1.8K R34 1K R67 1.2K R28 1.8K C10 122M C7 47P C4 102M R16 47K R13 820 R10 100K Q1 C2878 R7 6.8K R22 5.6K/0.25W C25 102 R62 2.2K R52 22K R61 2.2K R54 22K Q10 C2240 C22 2.2U/50V/NP R53 22K R1 1.5K C1 10UF/16V C16 100

26、UF/10V C19 47UF/50V D1 1N4148 D2 1N4148 D3 1N4148 1 2 3 4 5 6 7 8 CN3 8P2.0(90) +B OUT -E +E Feed back B C E -B OUT 1 2 3 4 5 6 7 8 CN2 8P2.0(90) LB LS FL AGND MUTE OVER VOLTAGE OVER LOAD Q18 C2705 Q15 C2240 Q7 A970 Q6 A970 R48 220 R25 5.6K/0.25W R44 1.5K1% R75 2.2K1% R51 220 R71 100 C29 20P C14 12P

27、 R19 47K R41 470K R38 8.2K R4 1.5K R32 1.8K R35 1K R68 1.2K R30 1.8K C11 122M C8 47P C5 560P R18 47K R14 820 R11 100K Q2 C2878 R8 6.8K R24 5.6K/0.25W C27 102 R66 2.2K R58 22K R65 2.2K R60 22K Q14 C2240 C24 2.2U/50V/NP R59 22K R3 1K C2 10UF/16V C17 100UF/10V C20 47UF/50V D5 1N4148 D6 1N4148 D7 1N4148

28、 1 2 3 4 5 6 7 8 CN4 8P2.0(90) +B OUT -E +E Feed back B C E -B OUT TO AMP BOARD TO AMP BOARD TO AMP BOARD TO AMP BOARD -VSS +VCC +12V LB LS FL MUTE OVER VOLTAGE OVER LOADV +B OUT +E Feed back B C E -B OUT -E 1 2 3 4 5 6 7 8 9 10 11 CN5 11P2.0(90) +12V -VSS +VCC LS LB FL VR1 1K VR3 1K VR2 1K To enhan

29、ce viewing, please print to A325 Cambridge Azur 640R AV Receiver Power Amplifer 2 Circuit Diagram Q42 C2705 Q30 C2240 Q36 A970 Q35 A970 R172 220 R93 5.6K/0.25W R162 1.5K1% R167 2.2K1% R175 220 R159 100 C65 20P C57 12P R141 47K R86 470K R154 8.2K R105 1.5K R83 1.8K R150 1K R147 1.2K R80 1.8K C49 122M

30、 C45 47P C41 560P R140 47K R134 820 R122 100K Q21 C2878 R98 6.8K R94 5.6K/0.25W C54 102 R131 2.2K R118 22K R130 2.2K R119 22K Q29 C2240 C34 2.2U/50V/NP R114 22K R104 1K C37 10UF/16V C61 100UF/10V C69 47UF/50V D19 1N4148 D20 1N4148 D21 1N4148 +B OUT -E +E Feed back B C E -B OUT Q39 C2705 Q24 C2240 Q3

31、2 A970 Q31 A970 R169 220 R90 5.6K/0.25W R160 1.5K1% R164 2.2K1% R168 220 R156 100 C63 20P C55 12P R137 47K R84 470K R152 8.2K R102 1.5K R78 1.8K R148 1K R144 1.2K R76 1.8K C47 122M C43 47P C39 102M R136 47K R132 820 R120 100K Q19 C2878 R96 6.8K R88 5.6K/0.25W C51 102 R125 2.2K R108 22K R124 2.2K R11

32、0 22K Q23 C2240 C31 2.2U/50V/NP R109 22K R101 1.5K C35 10UF/16V C59 100UF/10V C68 47UF/50V D10 1N4148 D11 1N4148 D12 1N4148 1 2 3 4 5 6 7 8 CN1 8P2.0(90) +B OUT -E +E Feed back B C E -B OUT RB RS C AGND MUTE OVER VOLTAGE OVER LOAD Q40 C2705 Q26 C2240 Q34 A970 Q33 A970 R171 220 R92 5.6K/0.25W R161 1.

33、5K1% R165 2.2K1% R170 220 R157 100 C64 20P C56 12P R139 47K R85 470K R153 8.2K R103 1.5K R79 1.8K R149 1K R145 1.2K R77 1.8K C48 122M C44 47P C40 102M R138 47K R133 820 R121 100K Q20 C2878 R97 6.8K R89 5.6K/0.25W C52 102 R127 2.2K R111 22K R126 2.2K R113 22K Q25 C2240 C32 2.2U/50V/NP R112 22K R100 1

34、.5K C36 10UF/16V C60 100UF/10V C67 47UF/50V D13 1N4148 D14 1N4148 D15 1N4148 1 2 3 4 5 6 7 8 CN6 8P2.0(90) +B OUT -E +E Feed back B C E -B OUT TO AMP BOARD TO AMP BOARD TO AMP BOARD TO AMP BOARD 1 2 3 4 5 6 7 8 9 10 11 CN8 11P2.0(90) +12V -VSS +VCC Q41 C2705 Q28 C2240 Q38 A970 Q37 A970 R174 220 R95

35、5.6K/0.25W R163 1.5K1% R166 2.2K1% R173 220 R158 100 C66 20P C58 12P R143 47K R87 470K R155 8.2K R107 1.5K R82 1.8K R151 1K R146 1.2K R81 1.8K C50 122M TO AMP BOARD C46 47P -B OUT E C B C42 102M Feed back R142 47K +E R135 820 -E +B OUT 1 2 3 4 5 6 7 8 CN7 8P2.0(90) R123 100K D18 1N4148 D17 1N4148 D1

36、6 1N4148 Q22 C2878 C70 47UF/50V R99 6.8K C62 100UF/10V C38 10UF/16V R91 5.6K/0.25W R106 1.5K C53 102 R116 22K R129 2.2K R115 22K C33 2.2U/50V/NP R128 2.2K Q27 C2240 R117 22K 1 2 3 4 5 6 7 8 9 10 CN9 10P2.0(90) FR TO AMP BOARD TO AMP BOARD TO AMP BOARD TO AMP BOARD FR RB /C RS VR4 1K VR6 1K VR7 1K VR

37、5 1K To enhance viewing, please print to A326 Cambridge Azur 640R AV Receiver Power Amplifier 1 1IN/LOW;2IN) 32 SCLK 33 SDATA 34 DAC TEST 35 GND 36 Y OUT 37 DAC2 38 DAC1 39 Y IN 40 DAC VCC(5V) 41 UV / Cb Cr SW 43 fsc OUT 44 1HDL CONT 45 C VCC (5V) 42 SECAM CONT 46 B-Y/Cb OUT 47 R-Y/Cr OUT 48 IC10 TA

38、1270BF Q5 14 Q6 13 Q7 12 Q1 4 Q2 5 Q3 6 Q4 7 Q8 11 QS 9 CS 10 CLK 3 SDA 2 STR 1 OE 15 VDD 16 VSS 8 IC12 TC4094BFN R-Y CLAMP DET 1 R-Y TO CCD 2 B-Y TO CCD 3 R-Y AGC DET 4 VCC 5 FILTER ADJ 6 S.C.P IN 7 B-Y AGC DET 8 PLL DET 9 CLOCK 10 CLOCK IN 11 VEE 12 VIN1 13 VDD 14 VIN2 15 VOUT2 16 VOB2 17 VOB1 18

39、VOUT1 19 VGG 20 GND 21 R-Y FROM CCD 22 B-Y FROM CCD 23 NODE SW1 24 NODE SW2 25 B-Y IN 26 R-Y IN 27 B-Y CLAMP DET 28 B-Y OUT 29 R-Y OUT 30 IC14 TA8772AN VSS 1 XTALin 2 XTALout 3 CTRL 1 4 OSCin 5 OSCout 6 MUTE 7 CDLR 8 SYNCjdg / Rout 9 CHARA / Gout 10 CHARA / Bout 11 IEOUT / BLKout 12 OUTMOD 13 CS 14

40、SDAin 15 SCLK 16 VDD 2 17 Cout 18 -NC- 19 Cin 20 Cbias 21 -NC- 22 Yout 23 -NC- 24 Yin 25 VSS 2 26 CVout 27 -NC- 28 CVin 29 CVcr 30 HFTin 31 SYNin 32 SEPout 33 SEPin 34 RST 35 VDD 1 36 A17 37 A16 38 A15 39 A14 40 A13 41 A12 42 A11 43 A10 44 A9 45 A8 46 A7 47 A6 48 A5 49 A4 50 A3 51 A2 52 A1 53 A0 54

41、OE 55 CE 56 D7 57 D6 58 D5 59 D4 60 D3 61 D2 62 D1 63 D0 64 IC28 LC74732W C out 8 Y out 14 Vref 4 C in 5 Y in 3 GND1 6 V+1 1 V+2 12 P S 7 GND2 9 CV out 11 Ysag 13 CVsag 10 IC25 NJM2567V Vin1 1 SW1 2 Vin2 3 SW2 4 Vin3 5 VCC 6 Vout 7 GND 8 6dB AMP IC27 NJM2265 Y1 1 Y0 2 VEE 7 VSS 8 Y COM 15 VDD 16 X1

42、13 X0 12 X COM 14 Z1 3 Z0 5 Z COM 4 A 11 B 10 C 9 INH 6 IC23 TC74HC4053AF Q4 1 Q6 2 COM 3 Q7 4 Q5 5 INH 6 VEE 7 VSS 8 C 9 B 10 A 11 Q3 12 Q0 13 Q1 14 Q2 15 VDD 16 IC16 TC74HC4051AF VIN1+ 1 NFB1 2 MUTE1 3 VIN2+ 4 NFB2 5 -VCC 6 VIN3+ 7 NFB3 8 -VCC2 9 MUTE3 10 VOUT3 11 MUTE2 12 VOUT2 13 GND 14 VOUT1 15

43、 +VCC 16 DR6dB 6dBDR DR6dB IC36 LA7108M 1Y 1 0Y 2 1Z 3 VDD 16 1X 13 X-COM 14 A 11 B 10 C 9 INH 6 VSS 8 0X 12 Y-COM 15 Z-COM 4 0Z 5 VEE 7 IC15 TC4053FN C out 8 Y out 14 Vref 4 C in 5 Y in 3 GND1 6 V+1 1 V+2 12 P S 7 GND2 9 CV out 11 Ysag 13 CVsag 10 IC35 NJM2567V Y0 1 Y2 2 COM-Y 3 Y3 4 Y1 5 INH 6 VEE

44、 7 VSS 8 B 9 A 10 X3 11 X0 12 COM-X 13 X1 14 X2 15 VDD 16 IC32 TC74HC4052AF 6dBDR Vin1 1 VEE1 2 6dBDR VEE2 4 Vin3 5 VOUT1 13 Vin2 3 V+1 14 6dBDR PowerSave 7 GND 8 VOUT2 11 V+3 10 VEE3 6 VOUT3 9 V+2 12 IC34 NJM2581M NC 1 SDA1 2 SCL1 3 GND 4 B11 5 A11 6 VCC 7 B12 8 A12 9 GND 10 B13 11 A13 12 VCC 13 B1

45、4 14 A14 15 GND 16 VCC 17 VSADJ 18 PRE 19 NC 20 S1 21 S2 22 S3 23 GND 24 Y4 25 Z4 26 VCC 27 Y3 28 Z3 29 GND 30 Y2 31 Z2 32 VCC 33 Y1 34 Z1 35 GND 36 GND 37 SCL_SINK 38 SDA_SINK 39 HPD_SINK 40 NC 41 OE 42 VCC 43 HPD3 44 SDA3 45 SCL3 46 GND 47 B31 48 A31 49 VCC 50 B32 51 A32 52 GND 53 B33 54 A33 55 VC

46、C 56 B34 57 A34 58 GND 59 NC 60 VCC 61 HPD2 62 SDA2 63 SCL2 64 GND 65 GND 66 B21 67 A21 68 VCC 69 B22 70 A22 71 GND 72 B23 73 A23 74 VCC 75 B24 76 A24 77 GND 78 VCC 79 HPD1 80 IC1 TMDS341APFC 59 Upgrade Procedure for 640R Visit the Cambridge Service Website and refer to our service bulletin TNBC -00

47、22. This bulletin contains the files needed in a zipped format. Downlaod the WINHOST V3.0 B program to a suitable directory on your p.c. This program is used to upload the separate .hex file also found in the Service Bulletin Select the appropriate .hex file (NTSC or PAL) according to your regional

48、TV standard You must connect the 640R to your p.c. via a null modem D sub lead In order to update your unit successfully, please follow the following steps. 1. Make sure that the unit you are going to update is in Power Off mode. Press the Power Switch to OFF 2. Push the Update Switch upward to Upda

49、te by using a paper clip. Update Switch 3 Then insert the update cable3. Then insert the update cable. RS 232 cableRS 232 cable 4. Power on the unit into Standby mode. 60 5. Open the update file WinHost V3.0B A POPEN tlt 640R hA. Press OPEN to select 640R.hex (update firmware) B. Make sure to tick these four items. C. Press Auto Scan Baud Rate is MATCH appears. Then press ENTER. D. When finished scanning, E. Press DO SELECT. 61 appears, then press ENTER. F. When finish program