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Daewoo DSC-30W60N Service Manual

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Service Manual

Relese 1
DIGITAL HDTV
CHASSIS : SC-110
Model : DSC-30W60N
DSC-30W60N

Specifications

Power Requirement
Power Consumption
Dimensions(W/H/D)
Weight
General
Antenna
RF Band Coverage
Screen Size
Display Format
Picture
Horizontal Resolution
Digital Audio
Sound
NTSC Audio
Audio Power
A/V In
S-Video In
HD Component Video In
Number of Inputs / Outputs
HD Component Audio In
Digital Audio In
Digital Audio Out
External Speaker Out
 Caution
: In this Manual, some parts can be changed for improving, their
performance without notice in the parts list. So, if you need the
latest parts information,please refer to PPL(Parts Price List) in
Service Information Center (http://svc.dwe.co.kr).
DAEWOO ELECTRONICS CO., LTD.
http : //svc.dwe.co.kr
S/M No. : TSC110NEF0
R-V3
AC 120V, 60Hz
250W (1.7W in standby)
890 x 573 x 560 mm
64kg
Two 75 ohm external input terminals for UHF/VHF/Cable
One 75ohm external output terminal for Cable
VHF 2 ~ 13
UHF 14 ~ 69
CATV 1, 14 ~ 125
32 inches Pure Flat 16:9 Aspect ratio
1920
x 1080i (Digital)
Upconversion to 1080i with line doubling (NTSC)
800 Lines
Dolby Digital AC-3 / Pro logic
Multi-CH TV Stereo (MTS) / Second Audio Program (SAP)
8W / ch (Main L/R, Woofer), 5W / ch (Center, SL, SR)
4 each (Video / L / R)
2 each
2 each ( Y/ Pb / Pr, R / G / B )
1 each ( L / R / SL / SR / Center / Woofer )
2 each ( Coaxial / Optical )
2 each ( Coaxial / Optical )
1 each ( SL / SR / Woofer)
Mar. 2000

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Summary of Contents for Daewoo DSC-30W60N

  • Page 1: Service Manual

    S/M No. : TSC110NEF0 Service Manual Relese 1 DIGITAL HDTV CHASSIS : SC-110 Model : DSC-30W60N R-V3 DSC-30W60N Specifications Power Requirement AC 120V, 60Hz Power Consumption 250W (1.7W in standby) Dimensions(W/H/D) 890 x 573 x 560 mm Weight 64kg General...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS 1. Product Safety ..........................2 2. Specifications ..........................4 3. Reote Control Overview.........................5 4. Limited Warranty ..........................7 5. Service Mode ..........................8 6. General Adjustment ........................11 7. Special Adjustment (When replacing new circuit boards) ............17 8. Troubleshooting Charts.........................18 9. Parts List ............................45 10.

  • Page 3: Product Safety

    1.PRODUCT SAFETY SERVICING GUIDELINES FOR COLOR TELEVISION RECEIVERS CAUTION : Do not attempt to modify this product in any way. Unau- GRAPHIC SYMBOLS : thorized modifications will not only void the warranty, but may lead to your being liable for any resulting property damage or user injury. The lightning flash with arrowhead symbol, Service work should be performed only after you are thoroughly within an equilateral triangle, is intended to alert...
  • Page 4 SUBJECT : IMPLOSION 4. Wall and shelf mounted installations using a commercial mounting kit, must follow the factory approved mounting instructions. A receiver mounted to a shelf or platform must retain its original 1. All direct viewed picture tubes are equipped with an integral implo- feet(or the equivalent thickness in spacers) to provide adequate sion protection system, but care should be taken to avoid damage are flow across the bottom, bolts or screws used for fasteners...

  • Page 5: Specifications

    2. Specification General Power Requirement AC 120V, 60Hz Power Consumption 250W (1.7W in standby) Dimensions(W/H/D) 890 x 573 x 560 mm Weight 64kg Antenna Two 75 ohm external input terminals for UHF/VHF/Cable One 75ohm external output terminal for Cable RF Band Coverage VHF 2 ~ 13 UHF 14 ~ 69 CATV 1, 14 ~ 125...

  • Page 6: Remote Control Overview

    33. Remote control overview The remote control has the following functions: 1. Power button Press to turn the HDTV(and other equipment) on and off. 2. MODE buttons Press to select which equipment you wish your remote control to operate: * SAT(satelite) * CATV (cable box) * VCR * TV...
  • Page 7 Remote control overview 11. SOUND button 24. PREV (Previous) button Press to select a sound option : Mono, Stereo, or Secondary Press to back up one menu at a time in the HDRV menus or to Audio Programming (SAP). When you tune to a digital return to the previous channel.

  • Page 8: Limited Warranty

    4. Limited Warranty Daewoo Electronics Corporation of America Inc. (also known as DECA) warrants this product to be free from defects in material and workmanship and agrees to remedy any such defect. This warranty covers 3 years labor and 3 years parts from the date of original purchase.

  • Page 9: Service Mode

    5. Service Modes 1. Entering to Service Mode 1) With the user remote control Press the button in the following order. MUTE SELECT MUTE POWER 1,2,3, … ., 9 2) With the service remote control S1 : Heat Run S2 : Screen Voltage S3 : Sound Controls S4 : Video Controls S5 : Geometry...
  • Page 10 Service Modes 5) S5 : Geometry Adjustment mode V Size Max Side Pin W V Size Side Pin S V Position Trapezoid V C Linearity Side Pin Balance Initial value V S Linearity H Duty H Size Parallelogram H Position H Focus Phase Pincusion H Focus Amplitude...
  • Page 11 Service Modes 3. Selecting the adjusting items 1) With the user remote control Pressing of ARROW s button changes the adjustment items. (t button for reverse order) 2) With the service remote control Pressing of CHANNEL s button changes the adjustment items. (t button for reverse order) 4.

  • Page 12: General Adjustment

    6. General Adjustment In the majority of cases, a high definition digital television will need basic adjustments such as high voltage, screen voltage, focus, white balance, sub brightness, geometry, and blanking width. All adjustments should be performed after heat-running the set for at least 20 minutes.
  • Page 13 General Adjustment 4. Dark Area Adjustment 1) On the center of dark area, attach the sensor of a white balance meter. 2) To be Y=12, turn the Dark Beam control volume on the White & Black pattern generator. 3) To adjust the white balance of dark area, select Bias R, G, B with CHANNEL Up or Down buttons, and adjust individual values with VOLUME Up or Down buttons.
  • Page 14 General Adjustment Geometry 1. To adjust V-Position, H-Size, H-Position and so forth, tune on Retma Pattern. 2. To adjust Pincushion, Parallelogram and so forth, tune on Cross Hatch signal. 3. Screen Mode should be on Full mode, and the Video Mode should be on Normal mode. 4.
  • Page 15 General Adjustment Item Screen Image Adjustment Procedure 1) Receive NTSC Retma signal. 2) The Screen mode should be selected on Full mode 3) When the center area of Retma signal’s circle is S type in the vertical direction, adjust VS Linearity so that vertical interval may be the same.
  • Page 16 General Adjustment Item Screen Image Adjustment Procedure 1) Receive NTSC Cross Hatch signal. 2) The Screen mode should be selected on Full mode. 3) When the vertical lines of the left and right side is not Side Pin S straight but distorted in the S type, adjust Side Pin S to correct the unbalanced vertical lines.
  • Page 17 General Adjustment Item Screen Image Adjustment Procedure 1) There is no need to adjust, and check if the value of 400Vp-p data is "32". 2) Check if the focus on the right and left side is clear. H Focus 900Vp-p Amplitude 60Hz Blanking Width...

  • Page 18: Special Adjustment (When Replacing New Circuit Boards)

    7. Special Adjustment (When replacing new circuit boards) 1. DTV Decoder module 1) Before replacing a new module, if seeing OSD menu is possible, record the adjusted data value of White Balance and Geometry. 2) After replacing the defective module with a new one, memorize the value of data value to the new DTV decoder module with the service remote control.

  • Page 19: Troubleshooting Charts

    8. Troubleshooting charts. No Picture (NTSC Signal) OSD is on the screen. To DTV Decoder Module AV Signal RF Signal Check video signal of IC210. CVBS is to pin 13 of PW01M Video 1 : CVBS to pins 43 ,Y to pin 45, and C to pin 47 Video 2 : CVBS to pin 7 Check Tuner (U101).
  • Page 20 Troubleshooting charts When input signal is color bar, check the following output level To DTV Decoder Module to PA06D. Y=0.7Vp-p ± 0.1Vp-p Pb=0.6Vp-p ±0.1Vp-p Pr=0.6Vp-p±0.1Vp-p Check the input and output signal of IC208. Check IC208 Pins 9, 10, and 11 : Low (Base of QC215 : High) Check logical state to pin 52 of IC 212.
  • Page 21 Troubleshooting charts Signals R, G, and B are to pins 2, 4, and 6 of PW07K. Check the following parts. R : pin 25 of IC201, Q218 G : pin31 of IC201, Q216 B : pin 28 of IC201, Q217 There are R signal to R504, G signal to R513, and B signal.
  • Page 22 Troubleshooting charts Y, Pb, Pr Input OSD is on the screen. To DTV Decoder module Check the SELECT SGINAL switch on the rear panel is to Y/Pb/Pr. Select the switch to Y/Pb/Pr. If the switch is selected to R/G/B, the color of screen is pale green. Check if Y/Pb/Pr signals are well connected to input terminals.
  • Page 23 Troubleshooting charts R, G, B Input OSD is on the screen. To DTV Decoder module Check the SELECT SGINAL switch on the rear panel is to R/G/B. Select the switch to R/G/B. Signals R, G, and B are to pins 7, 8, and 9 of IC201. Check IC207.
  • Page 24 Troubleshooting charts No sound (NTSC) Audio signal output is only R and L. There are no sound to Center, SL, SR, and Woofer. RF Signal AV Signal Check if the audio signals are input to the follow Check the audio base-band signal to SIF of U101. Amplitude of SIF : 800mVp-p ±...
  • Page 25 Troubleshooting charts Check if R, L signals are input and output to I609. Check I609 (The audio output of I609 is equalized signal.) Audio L input : pin 1, Audio R input : pin 30 Audio L output : pin 12, Audio R output : pin 19 Check if R, L signals are input and output to I607.
  • Page 26 Troubleshooting charts No sound (External HD) SL, SL, Center, and Woofer R, L Check the following audio signals. Check if R, L signals are input and output to IC215. SL input / output : pins 12, 6 of I603 HD_L input : pin 53 HD_L output : pin 37 SR input / output : pins 16, 2 of I603 HD_R input : pin 54, HD_R output : pin 36...
  • Page 27 Troubleshooting charts NO Sound Decoder (RF DTV) C, W, SR, SL R, L Woofer, Center, SR, SL Check DEC_R and DEC_L to PA05D. Check S_R, S_L, Center and Woofer to PA12D. To DTV Decoder module Decoder R, L Check the following audio signals. S_L input / output : pins 5, 6 of I603 S_R input / output : pins 1, 2 of I603 Center input /output : pins 8, 7 of I602...
  • Page 28 Troubleshooting charts H/V Sync Check (External HD Component Input) R/G/B/Hs/Vs R/G/B with sync on green or Y/Pb/Pr Check the input/output signal of IC202. Check the input/output signal of IC203 Pins 11, 10 : High (Base of QC215 : Low) G or Y input : pin 4 HS input : pin 13 HS output : pin 14 HS output : pin 14...
  • Page 29 Troubleshooting charts Check the following signals. HP : pin 6 of PW01V Check HP signal of Q426’s base. 5Vp-p Check VP signal of Q415’s base. 33.75KHz VP : pin 7 of PW01V 5Vp-p Check VP signal is to pin 21 of IC212. 60Hz Check IC204.
  • Page 30 Troubleshooting charts H/V Sync Check (RF DTV, RF NTSC, AV NTSC) DEC_HS is to PA06D. 3.3Vp-p To DTV Decoder module 33.75KHz DEC_VS is to PA06D. 3.3Vp-p 60Hz DEC_HS is input / output to pins 15, 2 of IC209. DEC_VS is input / output to pins 14, 13 of IC209. Check IC 209.
  • Page 31 Troubleshooting charts No Raster Press POWER button, and wait for 2 minutes. Check if TV micro- processor (IC212) communicates Power LED keeps continuously lighting up green. with DTV Decoder module on UART. If the LED changes from green to red, check pin 39 (TXD) of IC212.
  • Page 32 Troubleshooting charts Trigger pulse is input to pin 2 of I407. Check Q416, Q417 2Vp-p 6Vp-p 33.75KHz The control voltage of H Drive is input to pin 5 of I407. 60Hz Check pin 9 (E/W ) of IC402. 0.5Vp-p 7Vp-p H Drive signal is output to pin 3 of I407.
  • Page 33 Troubleshooting charts Check 200VA to PA14M. To No Power H Drive signal is output to Source of Q423. Check Q423. 200Vp-p 33.75KHz Horizontal Drive B+ to R481 is about 130Vp-p ± 10Vp-p . 60Hz 10Vp-p 130Vp-p The voltage waveform of Q425’s collector is the following. If the impedance value of Q425’s collector is near zero Ω...
  • Page 34 Troubleshooting charts High Voltage Drive Check pin 17 (H-Drive output) of I402. 0.7Vp-p Check I402. 33.75KHz Check H Drive signal to emitter of Q402. 12Vp-p 33.75KHz Trigger pulse is input to pin 2 of I401. 2Vp-p Check Q403. 6Vp-p 33.75KHz The control voltage of high voltage feedback is input to Check I403 and high voltage pin 5 of I401.
  • Page 35 Troubleshooting charts HVD1 High Voltage Drive signal is output to pin 3 of I401. Check I401. 12Vp-p 33.75KHz Check 200VB to PA14M. To No Power High Voltage Drive signal is output to Source of Q407. Check Q407. 200Vp-p 33.75KHz FBT B+ to pin 15 of PW16P is about 130Vp-p ± 10Vp-p. 60Hz Check Q407.
  • Page 36 Troubleshooting charts HVD2 Check EHT Drive signal to base of Q808. Check emitter of Q401. 12Vp-p 33.75KHz The voltage waveform of Q810’s drain is the following. Check Q810. 815Vp-p...
  • Page 37 Troubleshooting charts Vertical Deflection Check I402. Vertical SAW waveform is to pin 8 of I402. 2.2Vp-p 60Hz The following waveform is to pin 1 of I412. Check vertical deflection circuits around I412. 3.5Vp-p Vertical deflection waveform is to pin 5 of I412. Check vertical deflection circuits 50Vp-p around I412.
  • Page 38 Troubleshooting charts No Power (Standby Power : U801) The Standby LED doesn’t light up red. Approximately 150VDC is to C806. Check if F801 is open. Check D801 (bridge rectifier). The following waveform is to drain of U801. Check the impedance value of between Source and Drain to U801.
  • Page 39 Troubleshooting charts No Power Switch relay (Y802) doesn’t operate. (F801) doesn’t short-circuit. Replace F801. Bridge rectifier (D805) doesn’t short-circuits. Replace D805. (The voltage of between Anode and Cathode to D805 is 0.6V). Both AC lines of power cord don’t short-circuit. Replace the parts caused a short-circuit.
  • Page 40 Troubleshooting charts The following waveform is to pin 1 of U803 and U805. Check the primary circuits of SMPS IC, and replace defective parts with a new one. 370Vp-p 50~80KHz NO Power Switch relay operation (Y802) is OK. Check the parts caused a short- Replace defective parts with circuit to secondary circuits..
  • Page 41 Troubleshooting charts Check Regulators. (U807, U808, U809) Supply 200VA to PA14M. R803 is OK. ReplaceR803. R815 is OK. Replace R815. Q802, D815 are OK. Replace Q802, D815. Check U805. Supply 200VB to PA14M. R807 is OK. Replace R807. Q801, D810 are OK. Replace Q801, D810.
  • Page 42 Troubleshooting charts DTV Channel Trouble When NO Signal Searching is not display Select Input Select on the Setup Menu, and Check Check Signal Strength. Check tuner power to pins 6, 11, and 15 of U101. Check IF signal to pin 19 of U101. Check AGC to pin 3 of U101.
  • Page 43 Troubleshooting charts No Picture to DTV RF (Color and luminance signal is not output.) Check Y, Pb, and Pr to pins 38, 33, and 39 of IC917(Video DAC). Check Pixcko to pin 27 of IC917. Check 27MHz clock to pin 88 of IC901(Video decoder), and Y/Pb/Pr to pin 93 ~ 125.
  • Page 44 Troubleshooting charts Loss of H/V sync to DTV RF Picture is scrolling due to horizontal or vertical sync loses. Check H/V sync signal of Video decoder to PW06V. Check 27MHz clock to pin 88 of IC901(Video decoder), and Y/Pb/Pr to pin 93 ~ 125. Check H/V sync.
  • Page 45 Troubleshooting charts No sound to DTV RF (Audio Center, Woofer) Check audio C/W to pins 2, 4 of PW12M. Check pins 23, 24 of IC920. Check pins 63, 64, 67, and 73 of IC912. Decoder C, W, SR, SL Check pins 188, 190, and 197 of IC701 (Transport IC). If no signal, change IC701.

  • Page 46: Parts List

    In this Service Manual, some parts can be changed for improving, their performance without notice in the parts list. So, if you need the latest parts information, please refer to PPL(Parts Price List) in Service information Center(http://svc.dwe.co.kr) 9. Part List (DSC-30W60N) CAUTION “...
  • Page 47 Part List (DSC-30W60N) PART CODE PART NAME DESCRIPTION REMARKS PART CODE PART NAME DESCRIPTION REMARKS I412 1TDA8172-- IC V-OUT TDA8172 Q425A 4857027534 HEAT SINK AL EXBK I412A 4857028207 HEAT SINK AL EX BK Q425B 7174301011 SCREW TAPPTITE TT2 RND 3X10 MFZN...
  • Page 48 Part List (DSC-30W60N) PART CODE PART NAME DESCRIPTION REMARKS PART CODE PART NAME DESCRIPTION REMARKS CC612 HCBK102KCA C CHIP CERA 50V X7R 1000PF K 2012 RC403 HRFT103JCA R CHIP 1/10 10K OHM J 2012 CC613 HCBK102KCA C CHIP CERA 50V X7R 1000PF K 2012...
  • Page 49 Part List (DSC-30W60N) PART CODE PART NAME DESCRIPTION REMARKS PART CODE PART NAME DESCRIPTION REMARKS RC465 HRFT102JCA R CHIP 1/10 1K OHM J 2012 RC655 HRFT333JCA R CHIP 1/10 33K OHM J 2012 RC467 HRFT103JCA R CHIP 1/10 10K OHM J 2012...
  • Page 50 Part List (DSC-30W60N) PART CODE PART NAME DESCRIPTION REMARKS PART CODE PART NAME DESCRIPTION REMARKS 4856310300 EYE LET BSR T0.2 (R1.6) C401 CCXB1H391K C CERA 50V B 390PF K (TAPPING) 4856310300 EYE LET BSR T0.2 (R1.6) C402 CEXF1H100V C ELECTRO...
  • Page 51 Part List (DSC-30W60N) PART CODE PART NAME DESCRIPTION REMARKS PART CODE PART NAME DESCRIPTION REMARKS C485 CMXB2A103J C MYLAR 100V EU 0.01MF J (TP) Q421 TKTC3202Y- KTC3202Y (TP) C486 CEXF2A479V C ELECTRO 100V RSS 4.7MF (5X11) TP Q422 TKTA1270Y- KTA1270Y (TP)
  • Page 52 Part List (DSC-30W60N) PART CODE PART NAME DESCRIPTION REMARKS PART CODE PART NAME DESCRIPTION REMARKS D443 D1N4148--- DIODE 1N4148 (TAPPING) R438 RD-AZ332J- R CARBON FILM 1/6 3.3K OHM J D601 D1N4148--- DIODE 1N4148 (TAPPING) R439 RD-AZ183J- R CARBON FILM 1/6 18K OHM J...
  • Page 53 Part List (DSC-30W60N) PART CODE PART NAME DESCRIPTION REMARKS PART CODE PART NAME DESCRIPTION REMARKS R613 RD-AZ473J- R CARBON FILM 1/6 47K OHM J 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING R623 RD-AZ182J- R CARBON FILM 1/6 1.8K OHM J...
  • Page 54 Part List (DSC-30W60N) PART CODE PART NAME DESCRIPTION REMARKS PART CODE PART NAME DESCRIPTION REMARKS PA07V 4950706009 CONNECTOR SMH250-06+YT250+USW=350 C518 CMXL2E104K C MYLAR 250V MEU 0.1MF K PA08V 4950703007 CONNECTOR SMH250-03+YT250+ULW=500 C519 CCXB2H561K C CERA 500V B 560PF K (TAPPING)
  • Page 55 Part List (DSC-30W60N) PART CODE PART NAME DESCRIPTION REMARKS PART CODE PART NAME DESCRIPTION REMARKS D509 DRH1B----- DIODE RH-1B (TAPPING) R533 RD-AZ390J- R CARBON FILM 1/6 39 OHM J D510 DRH1B----- DIODE RH-1B (TAPPING) R534 RD-AZ561J- R CARBON FILM 1/6 560 OHM J...
  • Page 56 Part List (DSC-30W60N) PART CODE PART NAME DESCRIPTION REMARKS PART CODE PART NAME DESCRIPTION REMARKS C890 CCYE3D103P C CERA 2KV E 0.01MF P Q813 T2SC2688L- 2SC2688-L C891 CCYE3D103P C CERA 2KV E 0.01MF P Q814 T2SC4710LS 2SC4710LS D801 DD2SB80S-- DIODE...
  • Page 57 Part List (DSC-30W60N) PART CODE PART NAME DESCRIPTION REMARKS PART CODE PART NAME DESCRIPTION REMARKS C835 CEXF1C102C C ELECTRO 16V RUS 1000MF (10X20) TP C807 CMXB1H104J C MYLAR 50V EU 0.1MF J (TP) C843 CEXF1C102C C ELECTRO 16V RUS 1000MF (10X20) TP...
  • Page 58 Part List (DSC-30W60N) PART CODE PART NAME DESCRIPTION REMARKS PART CODE PART NAME DESCRIPTION REMARKS C901 CEXF1H220V C ELECTRO 50V RSS 22MF (5X11) TP L804 5MC0000100 COIL BEAD HC-3550 F801A 4857415001 CLIP FUSE PFC5000-0702 L805 5MC0000100 COIL BEAD HC-3550 F801B...
  • Page 59 Part List (DSC-30W60N) PART CODE PART NAME DESCRIPTION REMARKS PART CODE PART NAME DESCRIPTION REMARKS R859 RD-4Z103J- R CARBON FILM 1/4 10K OHM J R888 RD-AZ103J- R CARBON FILM 1/6 10K OHM J R860 RD-4Z103J- R CARBON FILM 1/4 10K OHM J...

  • Page 60: Circuit Digram

    10. Circuit Diagram 10-1. Connection Diagram...

  • Page 61: Signal Flow Diagram

    Circuit Diagram 10-2. Signal Flow Diagram CRT ASS'Y R G B VM YPbPr VIDEO ASS`Y ATSC ASS'Y MAIN L/R VIDEO AUDIO NTSC A/V MAIN L/R MAIN L/R C SL SR WOOFER SPEAKER MAIN L/R CENTER MAIN ASS'Y SL,SR WOOFER...

  • Page 62: Power Circuit

    Circuit Diagram 10-3. Power Circuit...

  • Page 63: Main Circcuit

    Circuit Diagram 10-4. Main Circuit...

  • Page 64: Video1 Circuit

    Circuit Diagram 10-5. Video1 Circuit...

  • Page 65: Video2 Circuit

    Circuit Diagram 10-6. Video2 Circuit...

  • Page 66: Audio Circuit

    Circuit Diagram 10-7. Audio Circuit...

  • Page 67: Com-Filter Circuit

    Circuit Diagram 10-8. Com-Filter Circuit...

  • Page 68: Vm Circuit

    Circuit Diagram 10-9. VM Circuit...

  • Page 69: Blanking Circuit

    Circuit Diagram 10-10. Blanking Circuit...

  • Page 70: Jack A/V, Control, Led Circuit

    Circuit Diagram 10-11. Jack A/V, CONTROL, LED Circuit...

  • Page 71: Crt Circuit

    Circuit Diagram 10-12. CRT Circuit...

  • Page 72: Exploded View

    11. Exploded View (DSC-30W60N)

  • Page 73: Pcb Layout

    Circuit Diagram 10-13.

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