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AD CONVERTER
SERVICE MANUAL
CONTENTS
SPECIFICATIONS ···································································· 3
PANEL LAYOUT······································································· 5
CIRCUIT BOARD LAYOUT ······················································ 6
DIMENTIONS ··········································································· 8
BLOCK DIAGRAM ···································································· 9
DISASSEMBLY PROCEDURE··············································· 10
LSI PIN DESCRIPTION ·························································· 14
IC BLOCK DIAGRAM ····························································· 16
CIRCUIT BOARDS ································································· 19
INSPECTION ·········································································· 36
TEST PROGRAM ··································································· 39
FLASH ROM UPGRADE ························································ 43
ERROR MESSAGES······························································ 45
PARTS LIST
OVERALL CIRCUIT DIAGRAM
This document is printed on chlorine free (ECF) paper with soy ink.
PA
011523
HAMAMATSU, JAPAN
200006**-150000
1.45K-9731 K
Printed in Japan '00.07

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  • Page 1

    AD CONVERTER SERVICE MANUAL CONTENTS SPECIFICATIONS ···································································· 3 PANEL LAYOUT······································································· 5 CIRCUIT BOARD LAYOUT ······················································ 6 DIMENTIONS ··········································································· 8 BLOCK DIAGRAM ···································································· 9 DISASSEMBLY PROCEDURE··············································· 10 LSI PIN DESCRIPTION ·························································· 14 IC BLOCK DIAGRAM ····························································· 16 CIRCUIT BOARDS ································································· 19 INSPECTION ··········································································...

  • Page 2: Specifications

    IMPORTANT NOTICE This manual has been provided for the use of authorized Yamaha Retailers and their service personnel. It has been assumed that basic service procedures inherent to the industry, and more specifically Yamaha Products, are already known and understood by the users, and have therefore not been restated.

  • Page 3

    AD824 SPECIFICATIONS MY8-AE, MY8-TD 39.69–50.88 kHz Sampling rate MY8-AT 41.013–50.88 kHz AD conversion resolution 24-bit linear, 128-times oversampling -1.5, +1 dB, 20 Hz–20 kHz, GAIN +10 dB Frequency response -3, +1 dB, 20 Hz–20 kHz, GAIN -62 dB Dynamic range * 110 dB (typical), GAIN +10 dB ±1 dB @ 1 kHz, GAIN -62 dB to +10 dB...

  • Page 4: Analog Output

    AD824 Analog Input Input Level For Use Actual Load Connection GAIN with Connector Max. Impedance Nominal Nominal before clip -62 dB -48 dB 50–600 Ω -62 dB (615 µV) (3.08 mV) XLR-3-31 type 3k Ω lines INPUT 1–8 * mics &...

  • Page 5: Panel Layout

    AD824 PANEL LAYOUT Front Panel WORD CLOCK PEAK PEAK GAIN INTERNAL POWER NOMINAL NOMINAL 44.1kHz 48kHz SLOT SIGNAL SIGNAL +48V +48V +48V MASTER OFF ON AD CONVERTER 12 13 PEAK, NOMINAL & SIGNAL indicators GAIN display GAIN control POWER indicator...

  • Page 6: Circuit Board Layout

    AD824 CIRCUIT BOARD LAYOUT MYSL CN052 CN053 CN051 CN054 Rear panel assembly CN907 CN908 MAIN CN902 CN101 CN201 CN906 CN905 CN901 CN001 CN904 CN002 Power transformer CN960 CN962 CN963 CN961 Front panel assembly...

  • Page 7

    AD824 CN104 CN204 CN103 CN203 CN102 CN202 CN005 CN003 CN004 CN002 CN001 CN001 CN004 CN003 MYSL CN011 CN010 CN008 CN007...

  • Page 8: Dimentions

    AD824 DIMENTIONS W: 480 H: 97.5 Unit: mm 67.5 67.5...

  • Page 9: Block Diagram

    AD824 BLOCK DIAGRAM RY101 +48V CN002 IC101 IC102 ADD-0~7 INPUT JK101 Q102 HA2A ,HA2B ,HA2C D-FF IC001 –006 IC101 CN102 CN101 PERK INSERT OUT JK102 NOMINAL SIGNAL CN962 CN002 LEVEL AINL+ IC103 IC104 IC104 SDATA 15–18 A / D AINL–...

  • Page 10: 2. Circuit Boards And Units

    AD824 DISASSEMBLY PROCEDURE Top Cover Remove the fourteen (14) screws marked [500]. The top cover can then be removed. (Fig. 1) Circuit Boards and Units Remove the top cover, each circuit board and unit can then be removed. Circuit Board and Unit Ref.

  • Page 11: Then Be Removed

    AD824 <Top View> <Top View> [350] [400] [400] [370] [430] [430] [370] AD shield sheet [350]: Bonding Tapping Screw-B 3.0X8 MFZN2BL (VN413300) [370]: Bonding Tapping Screw-B 3.0X8 MFZN2BL (VN413300) [400]: Bind Head Tapping Screw-B 3.0X6 MFZN2BL (EP600230) [430]: Bind Head Tapping Screw-B 3.0X6 MFZN2BL (EP600230) Fig.

  • Page 12

    AD824 <Top View> • Rear Panel Assembly OPT assembly [260] [260] [50A] X3 MYSL [110A] X2 [250] [250] [190] Fuse [210] [210] DC assembly Power transformer [250]: Bind Head Screw 4.0X8 MFZN2BL (EG340360) [50A]: Bind Head Tapping Screw-B A4.0X8 MFZN2BL (VC688800) [260]: Bonding Tapping Screw-B 3.0X8 MFZN2BL (VN413300)

  • Page 13

    AD824 PN Circuit Board: Remove the four (4) screws marked [30]. The PN circuit board can then be removed. (Fig. 9) SW Circuit Board: Remove the PSW knob marked [90]. (Fig. 9) Remove the two (2) screws marked [50B]. The SW circuit board can then be removed.

  • Page 14: Lsi Pin Description

    AD824 LSI PIN DESCRIPTION YM3436DK (XG948E0) DIR2 (Digital Format Interface Receiver) MAIN: IC921, 922 NAME FUNCTION NAME FUNCTION DAUX Auxiliary input for audio data RSTN System reset input HDLT Asynchronous buffer operation flag Vdda VCO section power (+5 V) DOUT...

  • Page 15

    AD824 HD6477042AF28 (XV731A00) CPU MAIN: IC911 NAME FUNCTION NAME FUNCTION PE14 Port E PE15 Port E Data bus Ground Ground Data bus Power supply Address bus Data bus Ground XTAL Crystal oscillator Mode control EXTAL Crystal oscillator Mode control Non-maskable interrupt request...

  • Page 16: Ic Block Diagram

    AD824 IC BLOCK DIAGRAM HD74LV04AFPEL (IS000400) HD74LV08AFPEL (IS000800) HD74LV32AFPEL (IS003200) HD74LVU04AFPEL (XY102A00) Quad 2 Input AND Quad 2 Input OR Hex Inverter MAIN: IC912 MAIN: IC926 MAIN: IC914,920 HD74LV74AFPEL (IS007400) SN74LV138ANSR (IS013810) SN74LV139ANSR (IS013910) Dual D-Type Flip-Flop SN74LV138AFPEL (IS013800) Dual 2 to 4 Demultiplexer...

  • Page 17

    AD824 HD74LV245AFPEL (IS024500) HD74LV273AFPEL (IS027300) SN75121NSR (XU816A00) Octal 3-State Bus Transceiver Octal D-Type Flir Flop Dual Line Driver MAIN: IC901,904-906,908,909,932-934 MAIN: IC925-928 MAIN: IC930 IC008 IC001-006 IC008 CLEAR D CK D CK CLOCK SN75124NS (XN976A00) SN75C1168NSR (XU073A00) HD74HC4053AF(EL) (XY879A00) Triple Line Receiver...

  • Page 18

    AD824 NJM2082M(T1) (XN797A00) NJM2068MD-T1 (XJ553A00) NJM4556AL (XP844A00) Dual Operational Amplifier MAIN: IC918 IC103,104,203,204,303,304,403,404, 503,504,603,604,703,704,803,804 IC101,201,301,401,501,601,701,801 IC101,301,501,701 IC101,201,301,401,501,601,701,801 +DC Voltage Output A Supply Inverting Output B Input A Inverting Non-Inverting Input B Input A Non-Inverting -DC Voltage Supply Input B...

  • Page 19: Circuit Boards

    AD824 CIRCUIT BOARDS AC Circuit Board (J, U, V) (XY031C0) ······································································· 19 AC Circuit Board (H,W,B) (XY032C0) ······································································· 19 AD Circuit Board (XY028A0)······················································································ 28 DC Circuit Board (J, U, V) (XY031C0) ······································································· 34 DC Circuit Board (H,W,B) (XY032C0) ······································································· 35 HA Circuit Board (XY029A0)······················································································...

  • Page 20

    AD824 MAIN Circuit Board from DC-CN010 to AD-CN003 3NA-V579130...

  • Page 21

    AD824 MYSL Circuit Board Component side Battery VN103500 VN103600(Battery holder for VN103500) Notice for back-up battery removal Battery Push the battery as shown in figure, Component side then the battery will pop up. Druk de batterij naar beneden zoals aangeven in de tekening, de batterij Battery holder springt dan naar voren.

  • Page 22

    AD824 MAIN Circuit Board 3NA-V579130...

  • Page 23

    AD824 MYSL Circuit Board Pattern side Pattern side MAIN, MYSL: 3NA-V579130...

  • Page 24

    AD824 HA Circuit Board 3NA-V579110...

  • Page 25

    AD824 Component side 3NA-V579110...

  • Page 26

    AD824 HA Circuit Board 3NA-V579110...

  • Page 27

    AD824 Pattern side 3NA-V579110...

  • Page 28

    AD824 AD Circuit Board to JK-CN203 to MAIN-CN909 to JK-CN103 3NA-V579120...

  • Page 29

    AD824 JK Circuit Board to AD-CN204 from HA-CN201 to AD-CN104 Component side from HA-CN101 Component side AD, JK: 3NA-V579120...

  • Page 30

    AD824 AD Circuit Board 3NA-V579120...

  • Page 31

    AD824 JK Circuit Board Pattern side Pattern side AD, JK: 3NA-V579120...

  • Page 32

    AD824 PN Circuit Board from DC-CN009 Component side 3NA-V579100...

  • Page 33

    AD824 PN Circuit Board Pattern side 3NA-V579100...

  • Page 34

    AD824 DC Circuit Board (J, U, V) Power transformer Power transformer to MYSL-CN052 to MAIN-CN906 to AD-CN001 Component side 3NA-V579140...

  • Page 35

    AD824 DC Circuit Board (H, W, B) Power transformer Power transformer to MYSL-CN052 to MAIN-CN906 to AD-CN001 Component side 3NA-V579150...

  • Page 36

    INSPECTION Preparations Conditions · The setting for AD824 is gain 10 dB, word clock INT 48 kHz. · Word clock in 75 ohms is set to on. · Signal input of only the CH to be measured. · Input signal to NCH when measuring NCH.

  • Page 37

    1 kHz +24 dB +18 dBu 18 +/-1 dBu INSERT OUT1 to 8CH Conditions: The load for AD824 insert out 1 to 8 channels is 10 kohms. (1) Maximum input Input frequency Input level Specified output level (AD824) Permissible range...

  • Page 38

    · Insert MY8-AE card into the slot and connect to DSA1 via the D-sub-cannon converter box. · Set AD824 word clock settings to BNC. · Set AD824 word clock settings to 44.1 kHz and 48 kHz. WORD CLOCK Permissible range 44.1 kHz...

  • Page 39: Test Program

    Stop bit: Parity: none Next, while pressing [SEL3] and [SEL8] keys simultaneously, turn on the power. The AD824 will enter the test program mode and “d00” will flash on the 7segLED. The following will appear on the terminal software. ( The version of the test program will be shown as x.xx.) AD824_DIAG>...

  • Page 40

    AD824 When in the test program execution, select the test program number for the gain encoder and the program can be executed each time the [+48V] key is pressed. During selection, the number will flash on the 7segLED and will change to steady on when the program is completed.

  • Page 41

    AD824 SLOT and CPU connection check The first line on the screen shows the condition at the data bus from the left D15, D14..D1, D0. The second line on the screen shows the condition at the address bus from the left A15, A14 . . . A2, A1.

  • Page 42

    AD824 [d02] SWITCH inspection Select the test program number [d02] with the gain encoder. The LED inspection will be executed when the [+48V] key is pressed. Or, it can also be executed by entering AD824_DIAG>d02 1. The LED near the relevant switch flashes.

  • Page 43: Flash Rom Upgrade

    (The software shown below is compatible up to the fourth unit.) 2-3. Reading the files to be loaded Click the [Browse] switch and the following window will open. Designate the files to be loaded to the AD824 and click PC/RS422 RS422 PC/RS422 RS422 the [Open] switch.

  • Page 44

    AD824 2-4. Loading the program Click the [Load] switch and the program will start to load. When completed, the following message will be displayed. 2-5. Others Click the [Disconnect] switch to reset the AD824 to the regular mode.

  • Page 45: Error Messages

    AD824 ERROR MESSAGES The AD824 performs several diagnostic checks when it’s turned on. If a problem isdetected, one of the following error codes appears briefly on the GAIN display. Internal backup-battery voltage low. Internal memory data corrupt. Internal backup-battery voltage low and internal memory data corrupt.

  • Page 46: Dc Assembly

    AD CONVERTER PARTS LIST CONTENTS OVERALL ASSEMBLY······························································································································ 2 FRONT PANEL ASSEMBLY ····················································································································· 4 REAR PANEL ASSEMBLY ······················································································································· 5 DC ASSEMBLY ········································································································································· 6 ELECTRICAL PARTS ························································································································· 7~31 Notes: DESTINATION ABBREVIATIONS Australian model M: South African model British model Chinese model Canadian model South-east Asia model German model Taiwan model...

  • Page 47

    AD824 OVERALL ASSEMBLY 520 290 Rear panel assembly: see page 5 DC assembly: see page 6 Front panel assembly: see page 4...

  • Page 48: Power Transformer

    AD824 PART NO. DESCRIPTION REMARKS REF NO. RANK OVERALL ASSEMBLY AD824 Overall Assembly (V560980) Overall Assembly (V560990) Overall Assembly (V561000) Overall Assembly (V561010) Bottom Assembly (V580690) V4067500 Bottom Chassis CB806590 Leg Black VR138400 Bind Head Tapping Screw-B 4.0X12 MFZN2BL Protection Sheet...

  • Page 49

    AD824 PART NO. DESCRIPTION REMARKS REF NO. RANK IF Plate VZ678500 VP156900 Bind Head Screw A4.0X12 MFZN2BL CB076120 Label H,W,B ACCESSORIES V5436200 DSUB Cable New Parts RANK Japan only FRONT PANEL ASSEMBLY PART NO. DESCRIPTION REMARKS REF NO. RANK FRONT PANEL ASSEMBLY...

  • Page 50

    AD824 REAR PANEL ASSEMBLY F001 PART NO. DESCRIPTION REMARKS REF NO. RANK REAR PANEL ASSEMBLY AD824 Rear Panel Assembly (V561020) Rear Panel Assembly (V561030) Rear Panel Assembly (V561040) Rear Panel Assembly (V561050) V4068100 Rear Panel Rear Panel V5254600 V5254700 Rear Panel...

  • Page 51

    AD824 DC ASSEMBLY F003 F002 F006 F007 F005 F004 PART NO. DESCRIPTION REMARKS REF NO. RANK DC ASSEMBLY AD824 V5610800 DC Assembly J,U,V V5610900 DC Assembly H,W,B Heat Sink (V406870) V4068800 Insulation Sheet V5792400 Circuit Board J,U,V Circuit Board H,W,B...

  • Page 52

    AD824 ELECTRICAL PARTS PART NO. DESCRIPTION REMARKS REF NO. RANK ELECTRICAL PARTS AD824 V5792300 Circuit Board J,U,V (XY031C0) V5792600 Circuit Board H,W,B (XY032C0) V5792400 Circuit Board J,U,V (XY031C0) V5792700 Circuit Board H,W,B (XY032C0) V5792500 Circuit Board J,U,V (XY031C0) V5792800 Circuit Board...

  • Page 53

    AD824 PART NO. DESCRIPTION REMARKS REF NO. RANK IC007 PST518B-TP SYSTEM RESET XD631A00 J001 VA078900 Jumper Wire 0.55 J004 VA078900 Jumper Wire 0.55 K001 BB069510 Land Terminal #6951 A-8 -003 BB069510 Land Terminal #6951 A-8 L001 VQ764500 Line Filter PLAC1522R0R01B1...

  • Page 54

    AD824 PART NO. DESCRIPTION REMARKS REF NO. RANK C143 Monolithic Ceramic Cap. F 0.010 50V Z UB044100 -146 UB044100 Monolithic Ceramic Cap. F 0.010 50V Z C201 UB044100 Monolithic Ceramic Cap. F 0.010 50V Z C202 UB044100 Monolithic Ceramic Cap.

  • Page 55

    AD824 PART NO. DESCRIPTION REMARKS REF NO. RANK -520 Monolithic Ceramic Cap. SL 100P 50V J UB052100 C521 UU167100 Electrolytic Cap. 10.00 50.0V C522 UB052220 Monolithic Ceramic Cap. SL 220P 50V J C523 UB052220 Monolithic Ceramic Cap. SL 220P 50V J...

  • Page 56

    AD824 PART NO. DESCRIPTION REMARKS REF NO. RANK -820 Monolithic Ceramic Cap. SL 100P 50V J UB052100 C821 UU167100 Electrolytic Cap. 10.00 50.0V C822 UB052220 Monolithic Ceramic Cap. SL 220P 50V J C823 UB052220 Monolithic Ceramic Cap. SL 220P 50V J...

  • Page 57

    AD824 PART NO. DESCRIPTION REMARKS REF NO. RANK JK302 Phone Jack HLJ4306 STEREO INSERT OUT(BAL) 3 LB301920 JK303 LB301920 Phone Jack HLJ4306 STEREO INSERT IN(BAL) 3 JK402 LB301920 Phone Jack HLJ4306 STEREO INSERT OUT(BAL) 4 JK403 LB301920 Phone Jack HLJ4306 STEREO...

  • Page 58

    AD824 PART NO. DESCRIPTION REMARKS REF NO. RANK R238 Metal Film Resistor 2.2K 1/4 F VC327200 R239 VC327200 Metal Film Resistor 2.2K 1/4 F R240 HF754470 Carbon Resistor 47.0 1/4 J R241 HF754470 Carbon Resistor 47.0 1/4 J R245 HF754390 Carbon Resistor 39.0 1/4 J...

  • Page 59

    AD824 PART NO. DESCRIPTION REMARKS REF NO. RANK R508 Metal Film Resistor 22.0K 1/4 F VC329600 R509 VC329600 Metal Film Resistor 22.0K 1/4 F R510 HF754750 Carbon Resistor 75.0 1/4 J R511 HF754750 Carbon Resistor 75.0 1/4 J R512 RD258100 Carbon Resistor (chip) 100.0K 0.1 J...

  • Page 60

    AD824 PART NO. DESCRIPTION REMARKS REF NO. RANK R732 Metal Film Resistor 5.1K 1/4 F VC328100 R733 VC328100 Metal Film Resistor 5.1K 1/4 F R734 HF754390 Carbon Resistor 39.0 1/4 J R735 HF758100 Carbon Resistor 100.0K 1/4 J R736 VC329200 Metal Film Resistor 15.0K 1/4 F...

  • Page 61

    AD824 PART NO. DESCRIPTION REMARKS REF NO. RANK C114 Monolithic Ceramic Cap. F 0.010 50V Z UB044100 C115 UB044100 Monolithic Ceramic Cap. F 0.010 50V Z C116 UU148100 Electrolytic Cap. 100.00 25.0V C117 UB052100 Monolithic Ceramic Cap. SL 100P 50V J...

  • Page 62

    AD824 PART NO. DESCRIPTION REMARKS REF NO. RANK C406 Monolithic Ceramic Cap. SL 220P 50V J UB052220 C407 UB052220 Monolithic Ceramic Cap. SL 220P 50V J C408 UB013100 Monolithic Ceramic Cap. B 1000P 50V K C409 UB013100 Monolithic Ceramic Cap.

  • Page 63

    AD824 PART NO. DESCRIPTION REMARKS REF NO. RANK C625 Monolithic Ceramic Cap. F 0.010 50V Z UB044100 C628 UB051220 Monolithic Ceramic Cap. SL 22P 50V J C629 UB051220 Monolithic Ceramic Cap. SL 22P 50V J C641 UB245100 Monolithic Ceramic Cap.

  • Page 64

    AD824 PART NO. DESCRIPTION REMARKS REF NO. RANK D501 Diode D1F60 VS201100 -503 VS201100 Diode D1F60 D601 VS201100 Diode D1F60 -603 VS201100 Diode D1F60 D701 VS201100 Diode D1F60 -703 VS201100 Diode D1F60 D801 VS201100 Diode D1F60 -803 VS201100 Diode D1F60...

  • Page 65

    AD824 PART NO. DESCRIPTION REMARKS REF NO. RANK Q204 Transistor 2SC2240 GR,BL IC224030 Q205 IC224030 Transistor 2SC2240 GR,BL Q301 VV556400 Transistor 2SC2412K Q,R,S -303 VV556400 Transistor 2SC2412K Q,R,S Q304 IC224030 Transistor 2SC2240 GR,BL Q305 IC224030 Transistor 2SC2240 GR,BL Q401 VV556400...

  • Page 66

    AD824 PART NO. DESCRIPTION REMARKS REF NO. RANK R210 Carbon Resistor 10.0 1/4 J HF754100 R211 VC330400 Metal Film Resistor 47.0K 1/4 F R212 VC330400 Metal Film Resistor 47.0K 1/4 F R213 HF754100 Carbon Resistor 10.0 1/4 J R214 HF754100 Carbon Resistor 10.0 1/4 J...

  • Page 67

    AD824 PART NO. DESCRIPTION REMARKS REF NO. RANK R408 Metal Film Resistor 2.0K 1/4 F VC327100 R409 HF754100 Carbon Resistor 10.0 1/4 J R410 HF754100 Carbon Resistor 10.0 1/4 J R411 VC330400 Metal Film Resistor 47.0K 1/4 F R412 VC330400 Metal Film Resistor 47.0K 1/4 F...

  • Page 68

    AD824 PART NO. DESCRIPTION REMARKS REF NO. RANK R606 Metal Film Resistor 4.7K 1/4 F VC328000 R607 VC327100 Metal Film Resistor 2.0K 1/4 F R608 VC327100 Metal Film Resistor 2.0K 1/4 F R609 HF754100 Carbon Resistor 10.0 1/4 J R610...

  • Page 69

    AD824 PART NO. DESCRIPTION REMARKS REF NO. RANK R802 Metal Film Resistor 6.8K 1/4 F VC328400 R805 VC326000 Metal Film Resistor 620.0 1/4 F R806 VC328000 Metal Film Resistor 4.7K 1/4 F R807 VC327100 Metal Film Resistor 2.0K 1/4 F...

  • Page 70

    AD824 PART NO. DESCRIPTION REMARKS REF NO. RANK C928 Monolithic Ceramic Cap. B 470P 50V K UB012470 C929 UB245100 Monolithic Ceramic Cap. F 0.100 25V Z -931 UB245100 Monolithic Ceramic Cap. F 0.100 25V Z C932 UB051150 Monolithic Ceramic Cap.

  • Page 71

    AD824 PART NO. DESCRIPTION REMARKS REF NO. RANK IC927 MBM29F800BA-70PFTN FLASH ROM 8M XU948A00 IC928 I S 0 2 7 3 0 0 HD74LV273AFPEL D-FF IC929 I S 0 1 7 4 1 0 SN74LV174ANSR D-FF IC930 XU816A00 SN75121NSR LINE DRIVER...

  • Page 72

    AD824 PART NO. DESCRIPTION REMARKS REF NO. RANK C103 Monolithic Ceramic Cap. F 0.100 25V Z UB245100 -105 UB245100 Monolithic Ceramic Cap. F 0.100 25V Z C106 UB044100 Monolithic Ceramic Cap. F 0.010 50V Z C107 UB044100 Monolithic Ceramic Cap.

  • Page 73

    AD824 PART NO. DESCRIPTION REMARKS REF NO. RANK IC501 NJM2068MD-T1 OP AMP XJ553A00 IC701 XJ553A00 NJM2068MD-T1 OP AMP LD101 VT838500 SLZ-135B-08-T1 RE PEAK 1 LD102 V4845500 SLZ-435B-08-T1 YE NOMINAL 1 LD103 VU091400 SLZ-235B-08-T1 GR SIGNAL 1 LD201 VT838500 SLZ-135B-08-T1 RE...

  • Page 74

    AD824 PART NO. DESCRIPTION REMARKS REF NO. RANK R308 Carbon Resistor (chip) 47.0K 0.1 J RD257470 -310 RD257470 Carbon Resistor (chip) 47.0K 0.1 J R311 RD256220 Carbon Resistor (chip) 2.2K 0.1 J -313 RD256220 Carbon Resistor (chip) 2.2K 0.1 J...

  • Page 75

    AD824 PART NO. DESCRIPTION REMARKS REF NO. RANK R803 Carbon Resistor (chip) 100K 0.1 D VV310400 R804 VV311300 Carbon Resistor (chip) 11K 0.1 D R805 VV310400 Carbon Resistor (chip) 100K 0.1 D R806 VV356300 Carbon Resistor (chip) 56K 0.1 D...

  • Page 76

    AD824 PART NO. DESCRIPTION REMARKS REF NO. RANK Power Transformer CEE A H,W,B XY175B00 VN103500 Lithium Battery CR2032 VS228900 AC Cord Assembly 2P 15A VS229000 AC Cord Assembly 3P 10A VS229100 AC Cord Assembly 3P 6A VS229200 AC Cord Assembly...

  • Page 77

    AD824 AD824 OVERALL CIRCUIT DIAGRAM 1/4 (MAIN, MYSL) SLOT MYSL KEC-92530 to DC-CN008 INVERTER MAIN BUFFER SYSTEM RESET SRAM 256K FLASH ROM 8M D-FF OP AMP BUFFER INVERTER BUFFER SRAM 256K to DC-CN010 BUFFER to PN-CN961 BUFFER MULTIPLEXER D-FF DECODER...

  • Page 78

    AD824 AD824 OVERALL CIRCUIT DIAGRAM 2/4 (AD, JK) OP AMP OP AMP OP AMP BUFFER OP AMP OP AMP INVERTER to MAIN-CN909 to HA-CN101 OP AMP OP AMP OP AMP OP AMP OP AMP OP AMP INSERT (BAL) OP AMP...

  • Page 79

    AD824 AD824 OVERALL CIRCUIT DIAGRAM 3/4 (HA) MULTIPLEXER BUFFER OP AMP OP AMP to MAIN - CN903 INVERTER DECODER MULTIPLEXER OP AMP D-FF OP AMP D-FF D-FF MULTIPLEXER OP AMP D-FF OP AMP D-FF to DC - CN007 D-FF MULTIPLEXER...

  • Page 80

    AD824 AD824 OVERALL CIRCUIT DIAGRAM 4/4 (PN, DC, SW, AC) OP AMP OP AMP OP AMP OP AMP to AD - CN002 Transistor Array to MAIN - CN904 Transistor Array +48V MASTER OFF / ON GAIN INTERNAL KEC-92527 to MAIN-CN905...

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