Service manual pk 001627 hamamatsu, japan contents specifications .............................................. 3/4 panel layout ...................................... 5 psr-740 block diagram .... 6 psr-640 block diagram .... 7 circuit board layout ................. 8 disassembly procedure ...........
6 psr-740 block diagram psr-740/psr-640 28ca1-8814457 pn ic29 ic33 ic24 108 114 120 123 122 5 43 48 114 94,96 ic23 ic25 ic31 ic27 ic26 ic32 ic3 ic1 ic30 ic2 8 ic22 ic28 33 232 231 34 35 234 134 77 76,222,225 86,98,99 102,103 223,221 81 101 135 136 ic6 ic4 ic14 ic14 ic7 ic8 ic15 ic11 ic12 ic9 ic310 i...
7 psr-640 block diagram psr-740/psr-640 28ca1-8813472 ic190 ic260 ic200 ic600 ic290 ic370 ic610 ic900 ic610 ic310 ic210,220 ic320 ic510 ic410 ic610 ic710 ic1 pc1 ic360 ic360 ic350 ic330 ic300 ic320 ic310 ic510 tr501-505 ic530 ic500 11 ic430 ic420 ic410 ic400 ic800 19 6 17 10 13 14 37 1 3 5 7 20 21 4...
14 psr-740/psr-640 1 /wrhh/pa23 o hh write/port a 73 d15 i/o 2 dack0/pe14 o dma transfer strobe/port e 74 d14 i/o data bus 3 /wrhl/pa22 o hl write/port a 75 d13 i/o 4 /cashh/pa21 i/o hh column address strobe/port a 76 d12 i/o 5 dack1/pe15 o dma transfer strobe/port e 77 vcc i power supply 6 vss i gr...
15 psr-740/psr-640 hg73c205afd (xu947c00) swx00b tone generator 1 icn i initial clear 85 cma3 o program address bus 2 rfclki i pll clock 86 cma8 o program address bus 3 tm2 i pll control 87 cma2 o program address bus 4 avdd_pll power supply 88 crd o read signal 5 avss_pll ground 89 cma1 o program ad...
16 psr-740/psr-640 tc203c760hf-002 (xs725a00) swp30b (awm tone generator coped with meg) standard wave processor ( ) pin no. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 6...
17 psr-740/psr-640 yss236-f (xt013a00) vop3 pin no. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 i/o o o o o o o o...
18 psr-740/psr-640 1 ainr+ i analog signal input (r channel +) 13 dgnd - digital ground 2 ainr- i analog signal input (r channel -) 14 tst4 i/o test mode setting 4 3 vref o reference voltage 15 amode2 interface clock select 2 4 va - analog power supply 16 /pd i power-down mode 5 agnd - analog ground...
Sn74hcu04nsr (xc723a00) sn74hcu04n (ig142250) hex inverter 1 2 3 4 5 6 7 1a 1y 2a 2y 3a 3y vss 14 13 12 11 10 9 8 vdd 6a 6y 5a 5y 4a 4y sn74hc08nsr (xd831a00) hd74lvc08fp (xu720a00) quad 2 input and 1 2 3 1a 1y 4 2a 5 2b 6 2y 7 vss 1b 14 13 12 vdd 4a 11 4y 10 3b 9 3a 8 3y 4b tc74hc32af (xn241a00) qu...
25 psr-740/psr-640 test no. Lcd (initial) test functions and judgment criteria test program a. Preparation 1) pa-6 (ac adaptor) is used. 2) the volume is usually moved to the use position when no volume change is required. 3) measuring instruments: frequency counter, level meter (with jis-c filter) ...
26 psr-740/psr-640 15 015: output l connect the level meter (with a jis-c filter) to the [phones] jack. (33 ohm load) set the [master volume] at maximum and check the output level (1 khz). Phones l: -8.0 dbm +/- 2 db phones r: less than -50.0 dbm connect the monaural plugs of the level meter (with a...
29 psr-740/psr-640 caution • all registration and user style/pad memory data, plus the other settings listed above, will be erased and/or changed when the data initialization procedure is carried out. • carrying out the data initialization procedure will usually restore normal operation if the psr-7...
30 psr-740/psr-640 alert message list the file is a purposely “copy-protected” disk. The copy function is not possible. The disk contains no file to be loaded, copied, or be deleted. Insert the disk that contains files to be loaded, copied, or deleted. An unformatted disk is inserted. An error occur...
31 psr-740/psr-640 this message appears when you attempt to edit, quantize or clear the track which contains no data in the record mode. This message indicates that recording a new user style cannot be started when all three user styles have recorded data. Make sure to clear at least one of the thre...
Cpu 12 11 10 9 8 7 6 5 4 3 2 1 a b c d e f g h i j k l m n o p q 12 11 10 9 8 7 6 5 4 3 2 1 a b c d e f g h i j k l m n o p q psr-740 circuit diagram (dm1/2, mks3, mkh, mkl, inv) psr-740 psr-740 psr-740 mks3 mkh dm mkl inv l c d to back - light assembly floppy disk drive to pn1-cn8 to jack-jk5 to am...
12 11 10 9 8 7 6 5 4 3 2 1 a b c d e f g h i j k l m n o p q 12 11 10 9 8 7 6 5 4 3 2 1 a b c d e f g h i j k l m n o p q psr-740 circuit diagram (dm2/2, mic-jack, mic) psr-740 psr-740 psr-740 dm to dm-cn3 to am-cn320 mic mic-jack swp30b vop3 inverter inverter wave rom ll 32m wave rom hl 32m wave ro...
Cpu 12 11 10 9 8 7 6 5 4 3 2 1 a b c d e f g h i j k l m n o p q 12 11 10 9 8 7 6 5 4 3 2 1 a b c d e f g h i j k l m n o p q psr-640 circuit diagram (dm, mks3, mkh, mkl, inv) psr-640 psr-640 psr-640 mks3 mkh dm mkl inv to jack-jk5 to pn1-cn8 to am - cn320 to am - cn310 l c d floppy disk drive to pn...
12 11 10 9 8 7 6 5 4 3 2 1 a b c d e f g h i j k l m n o p q 12 11 10 9 8 7 6 5 4 3 2 1 a b c d e f g h i j k l m n o p q psr-740 / psr-640 overall circuit diagram (am, hp, p.Sw, vr, jack, pn1, pn2, pn3, pn4, wh1, wh2, wh3, enc) psr-740 / psr-640 psr-740 / psr-640 psr-740 / psr-640 jack pn1 pn2 pn3 ...
