MZ-1E24 Service-Manual GB - The Sharp MZ
Contents
1. Logic level 1041 1 0 0 x x represent either 0 or 1 address bit At rs used fer selec tion of the 2 80 SIO channel The address bit AO is used for selection of the 7 80 SIO command or data Data channel A Command channel A Data channel B Command channel The baud rate must coincide with the specification of the software used For the MZ 80B 700 and 800 0 7 Port rate setup for each channel two channels and B are provided for this card it is possible to set baud rate independently for each chan nel The desired baud rate must be chosen out of ten baud rates by making short pin connection on 2 and JB B2 The 2 is used for the baud rate assignment of the channel and the JB B2 for the channel B Short pin Phort pin 1 s 4 5 6 7 8 9 10 75 110 150 800 600 12001800 2400 4800 9600 Notes Never try to insert more than two short pins at the same time as it may possibly invite a destruction the EC Proper communication would not be enabled unless the baud rate is identical at both sides 8 Connector signal mode There are two 9 connectors used in this card Channel A connector MZ 1E24 Channel B connector Fig 4 2 Connector pin configuration Signal assignment on connector pins can be altered by changing jumper block connections by which the channel can be assign2. a a o 9 i i uU 15 m 3855 ON LD v i8 E ole HH H Ix 20191015 zm 9 258 5 t gt lt Cig N X 22 8 moe DOIN MISSE gj ala SS uj j dioe e als SES 2 5 wf j j hl un 6 81219 eligo xia cicio lolly 5 S Shel E MES gt gt zirT LE ol ol ol 6 6 0 211 a 9 9 GOGH OS gt 02 02 joc S 2 gt OJO T 2 olojolo bio 25 oo 2 falta calls r n o x mme ue c c er ex defer ec exc erc lt lt saei c c cc t lt ex 1 11 11 INS 111 lt e NINN Io 2 Eel epe lt lt lt 0 lt lt lt lt 00 90 lt gt r o m lt e eoo e 5 gt
3. this mode when operated under the system software 1 6 DISK BASIC which supports the MZ 8BIO3 to the MZ 80B ST mode Standard RS 232C compatible mode It has to be set in tbis mode when the MZ 800 or the MZ 700 operated under DISK BASIC MZ 1E24 M JB A2 Selection of the baud rate for the channel A JB B2 Selection of the baud rate for the channel B For detail refer to Section 7 18 3 Selection of the terminal and modem mode for the channel A JB B3 Selection of the terminal and modem mode for the channe Setting up the RS signal The RS Request To Send signal is set to high by installing a jumper chip on the ON side of jumper block ON OFF Eo 7 55 98 up the R r signal for channel B setting up the RS Factory setting Signal for channel A Jumper chips should normally be in stalled in the OFF position 6 Port address assignment The Z 80 CPU issues 8 bit output for the port address Since four successive ports are used with the 2 1 24 a successive four port addresses must be selected by assigning the high order 6 bits of the 8 bit address output using the dip switch number Address IE NNNM NM a setup Logic level Switch position 0 port addresses therefore have been set to BOH B2H and B3H at the factory Address bit 5
4. MZ 1E24 SHARP SERVICE MANUAL OOZMZ1E24 E RS 232C INTER FACE FOR MZ80B 700 800 MZ 1E24 CONTENTS 1 T 2 PeatureSeeseeseseccecreuescxuesesecceeetectteoscsostoec 1 3 Block 1 4 Hardware 5 Jumper block 864 1 6 Port address setae 2 7 Port rate setup for each 2 8 Connector signal 3 9 1 4 lt n n nnn 4 10 Use of the diagnostic 5 11 Circuit diagram 6 19 ligt ee wae idee 8 SHARP CORPORATION PUT General 2 1 24 is RS 232C interface card which be used for the 2 700 MZ 800 and 2 80 2 Features Incorporation of dual channels per mits independent data transmission and reception modes of baud rates can be chosen by the jumper on the card which can be set independently for each channel States of connector output signals to the external device can be assign ed to the terminal or modem mode us ing the jumper The fo
5. ed to either terminal or modem mode RS 232C compatible signals are obtained in the terminal and modem mode That is binary signals transferred the voltage level Table 4 3 Channel mode Channel Alchannelh Terminal mode Table 4 4 shows connector pin assign ments in each mode For the pin number refer to Table 4 2 Table 4 4 Pin description pin No Safety Sefety a ground ground Transmit Receive Receive Transmit 2 Request RS Clear to CS to send send 5 Clear to CS Request RS send to send read ready Data set Equipment read read 8 Signal Signal ground ground __ o N C Signal description 1 Safety FC Safety FC ground ground 2 Transmit Receive RD data data Receive RD Transmit data data 5 5 3 Request R send recelve Equipment pp Device DR read read R Device Equipment read eround ground Ready to 1 to CS receive send The following alteration takes place when set to the modem mode BI mode ST mode 2 8 2 8 4 5 5 9 has to be set in the terminal mode when using the acoustic coupler Normally it is operated in the modem mode when the 2 1 24 is con nected with the 5 232 interface incorporating printer and plotter However thorough reading of the instruction manual is required in order to make proper u
6. el in the M mode and the channel B in the T mode Baud rate test Apply the universal conter probe to the JB A2 82 Check if the following frequency is observed 9600 153 6K Only three 4800 76 8K digits are 2400 38 4K effective 1800 28 8K 1200 19 2K 600 9600 300 4800 150 2400 110 1760 75 1200 Signal level test During the communication test apply the probe to the SD signal jumper block of the JB A3 and check if 129 is observed JB M tests Apply the probe to the RS signal jumper block of the Check if RS is stable at 12V when the JB M Parts code is ON Price Description rank tape UK 5 OGG1035ACZZ Test cable 777 9 ircuit diagram 5 D F5NV MC14411 24 ooo 11 1 P E n P TK 2 5 155131 35 2 03 prm ma 5o 4 55 D Tassi jet DT reat a WR RD fii ABD AT hajan e psf tel 45 fret reo ad RESET A3 om jej MZ 1E24 Pattern diagram i i 1 1 1 4 i wma Jumper wire 213 B d MZ 1E24 12 Parts list
7. gt gt gt ex r eue alec 2 00 an Lu gt gt 98 5 gt lt 02 9 t mim 2 et lt gt gt 2 2 2 2 211 2 21 2 2 lt lt lt 0 2 lt 1 n a v 2 lt lt HOO DOO gt gt 1 2 gt 2 2 gt gt 2 gt gt gt gt lt r jr m 2222 21 28 16 converter ____ _ _ AB _ 10 100 6 54 10 Capacitor 16 4752 AB 1 220pF AW B 110 1 0084 PRICE NEW RANK MARK R p m px ae ees 21 12 CAB E BA PARTS CODE PARTS CODE PSM3 0 5030 13 Electronic parts Packing amp Others E SHARP CORPORATION Industrial Instruments Group Quality amp Reliability Control Center 492 Minoshocho Yamatokoriyama Nara 639 11 Japan Feb 1985 Printed in Japan
8. llowing jumper assignment be attained using the jumper BI mode MODE 1 2 8 103 compatible ST mode MODE 2 Sharp standard RS 232C mode Block diagram DRIVER S SUPPLY VOLTAGE 127 12 WITH CRYSTAL 4 Hardware description 1 Address decoder From the CPU is issued an 8 bit output for port assign address Since four successive ports are used with the MZ 1E24 a successive four port addresses are chosen by assigning the high order 6 bits of the 8 bit output using the dip switch MZ 1E24 2 Bit rate generator The MOTOROLA MC1441 CMOS Bit Gener ator 1s used with the external 1 8432MHz crystal oscillator As ten kinds of baud rates are obtain ed on the output the user can lect the desired rate Driver The SN75188 is used for the line driver The supply voltages are VCC 12V VCC 12V 3 Receiver The SN75189A is used for the line receiver It operated under single supply of 5 4 5 2 80 510 0 280 510 0 is used for the serial I O drive 5 Jumper block description JB Al Selection of BI mode and ST mode for the channel JB Bi Selection of BI mode and ST mode for the channel B All jumpers in the same jumper block must be set to the same mode ST BI mode BI ST ST mode Do not make all jumpers connected in otherwise connection BI mode It is the mode compatible with the MZ 8Bi03 It has to be set in
9. se as tbere may an exemption 2 7 1 24 direct connection with the As the diagnostic program consists of computer without intervention of the board test and communication test the modem the following cable con the diagnostic program must be operated nection is required by operating the depending on the trouble phenomenon one of sides in the terminal mode and the other side in the modem mode the board test has not been com pleted successfully there may the 1 following possible cause 1 Check for proper supply of the clock 8050 2 Check for a failure in the dip switch 3 Failure in the 1 504 or 1 5266 4 Failure in the 510 D COON OU BH to 00 Cn amp 02 the communication test has not 9 Troubleshooting been completed successfully make test in the following sequence Check the crystal oscillator Check for a data bus and SIO failure The diagnostic program must be used for troubleshooting see Paragraph 10 Check the bit rate generator Program operation Check the 75188 DC DC converter Check the cable and jumper heck if level across B Check the 75189A Failure in the 510 Address decoder Data bus 10 Use of the diagnostic program Li 2 4 Make the monitor connected with the MZ 800 CRT 800 Insert the diagnos
10. tic cassette tape in the MZ 800 and load the diagnostic program Set the MZ 1E24 to be tested in the following manner 1 Dip switch 1 3 5 0N 2 2 Set the to the side th the JB B3 to the side and the JB Al BI to the BI mode 3 Set both switch of the JB M to the OFF side 4 Set the JB A2 B2 to the 1200 mode Mount the MZ 1E24 to the slot of the MZ 800 and connect the test cable Enter A8H which has been already set for the port address as prompted on the monitor screen Push the space bar to get the port address on display The following message will appear if entered correctly PORT NO AB Turn the dip switches 2 4 and 6 to the ON side and 1 3 5 to the OFF side 54H Push the CE key The following message will appear if entered correctly PORT NO 57 To perform the communication test set the dip switches 5 2 and 1 to the ON side and 6 4 3 to the OFF side 80H Push the CR key Next push the space bar following message will appear if entered correctly MZ 1E24 Then the port No B3 F7 is outputted The TO B OK B TO A OK It will be in a failure if only either side is on display with the control waiting for a command entry Ihe test has been successful up to Step 8 push the space bar to return to the port test the ST mode repeat the communication After changing to test Also test the chann
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