BBK BBK938S Service Manual Download Page 4

Page: 4 / 63

Front Panel

llustration

DIRECTION Arrow

VFD display window

ECHO adjustment knob

OPEN/CLOSE button

Disc tray

MIC 1 jack

PAUSE Button

POWER switch

MIC VOLUME knob

PLAY Button

MIC 2 jack

STOP Button

Playback Indicator

11 12 13

3.Control Button Locations and Explanations

Summary of Contents for BBK938S

Page 1: ...SERVICE MANUAL BBK938S...

Page 2: ...EW AND PART LIST 5 5 2 BRACKET EXPLOSED VIEW AND PART LIST 7 6 ELECTRICAL CONFIRMATION 9 6 1 VIDEO OUTPUT LUMINANCE SIGNAL CONFIRMATION 9 6 2 VIDEO OUTPUT CHROMINANCE SIGNAL CONFIRMATION 10 7 MPEG BOA...

Page 3: ...s place the assembly on a conductive surface such as alminum foil to prevent electrostatic charge buildup or exposure of the assembly 3 Use only a grounded tip soldering iron to solder or unsolder ES...

Page 4: ...indow 5 ECHO adjustment knob OPEN CLOSE button 10 2 Disc tray 7 MIC 1 jack PAUSE Button 12 POWER switch 6 MIC VOLUME knob PLAY Button 11 8 MIC 2 jack STOP Button 13 3 Playback Indicator 4 3 7 8 9 10 1...

Page 5: ...lay Mode Slow play STANDBY Button OSD Button 2 Fast backward play FWD Button 14 GOTO Button 3 NUMBER Buttons 5 6 TITLE Button CURSOR Buttons 7 REV Button 13 10 PROG Button STOP Button 11 PLAY Button 1...

Page 6: ...nds of the laser diode are short circuited After replacing the parts with new ones remove the short circuit according to the correct procedure See this Technical Guide 2 Do not use a tester to check t...

Page 7: ...5 1 Optical pickup Unit Explosed View and Part List Pic 1 5 Assembling and disassembling the mechanism unit 5...

Page 8: ...IDDLE A 1 7 1EA2511A29400 GEAR MIDDLE B 1 8 1EA2744A03000 SHAFT SLIDE 1 9 1EA2744A03100 SHAFT SLIDE SUB 1 10 1EA2812A15300 SPRING COMP TYOUSEI 3 11 1EA2812A15400 SPRING COMP RACK 1 21 1EA0B10B20100 AS...

Page 9: ...wheel 17 Pick up 5 gearwheel 18 switch 6 iron chip 19 Five pin flat plug 7 Immobility mechanism equipment 20 screw 8 Magnet 21 PCB 9 Platen 22 motor 10 Bridge bracket 23 Motor wheel 11 screw 24 screw...

Page 10: ...a soldering iron after a circuit is connected Keep the power source of the pick up protected from internal and external sources of electrical noise Refrain from operation and storage in atmospheres c...

Page 11: ...illoscope to the video output terminal and terminate at 75 ohms 2 Confirm that luminance signal Y S level is 1000mVp p 30mV Measurement point Video output terminal Color bar 75 PLAY Title 46 DVDT S15...

Page 12: ...e at 75 ohme 2 Confirm that the chrominance signal C level is 621 mVp p 30mV Measurement point Video output terminal Color bar 75 PLAY Title 46 DVDT S15 PLAY Title 12 DVDT S01 DVDT S15 or DVDT S01 Mod...

Page 13: ...7 MPEG BOARD CHECK WAVEFORM 7 1 27MHz WAVEFORM DIAGRAM 7 2 IC5L0380R PIN 2 WAVEFORM DIAGRAM 11...

Page 14: ...rnal register through bi directional serial port to configure modes selection FEATURES n RF equalizer with programmable c f from 3MHz to 70 MHz and programmable boost from 3dB to 13dB n MT1336 support...

Page 15: ...INPUT MUX REF and 2VREF Voltage Generator VGA EQ ENVELOP DETECTOR AGC CDA DVDB CDB DVDC CDC DVDD CDD DVDRFIN DVDRFIP TPI TNI RFOP SBAD TE RF LEVEL FE DVD APC MDI1 LDO1 CD APC VREFO SLCK SDEN SERIAL PO...

Page 16: ...7 IO8 IO9 FEO IOB SW2 IOA 1 2 3 4 5 6 7 8 9 10 11 12 13 15 16 17 18 19 20 21 22 23 24 26 27 28 29 30 31 32 33 34 35 37 38 14 25 36 IO0 AVDDF IO6 AGNDX AVDDM HALLCOS COSPHI REFCOS AGNDM HALLSIN UDGATE...

Page 17: ...A Analog input AC coupled DVD RF signal input A 99 DVDB Analog Input AC coupled DVD RF signal input B 98 DVDC Analog Input AC coupled DVD RF signal input C 97 DVDD Analog Input AC coupled DVD RF signa...

Page 18: ...xternal current bias resistor R 20K 119 AGC1 Analog Wobble AGC loop1 capacitor 121 AGC2 Analog Wobble AGC loop2 capacitor 122 AGC3 Analog Wobble AGC loop3 capacitor 127 RFSUBO Analog output Header pus...

Page 19: ...tput POWER 67 69 AVDD Power Master PLL Filter power 65 73 AGND GND GND for Master PLL Filter 64 AVDD Power DPD Power 62 AGND GND DPD GND 109 AVDD Power RF path Power 107 AGND GND RF path GND 114 SVDD...

Page 20: ...e input of amplifier for hall sensor signal 75 REFSIN Analog input Positive input of amplifier for hall sensor signal 76 SINPHI Analog output Amplifier output for hall sensor signal 71 HALLCOS Analog...

Page 21: ...MT1336 PRELIMINARY SUBJ ECT TO CHANGE WITHOUT NOTICE MTK CONFIDENTIAL NO DISCLOSURE 48 IO6 49 IO7 50 IO8 51 IO9 52 IOA 53 IOB 19...

Page 22: ...rovide a varipitch speed control for CLV and CAV mode Built in ADCs and DACs for digital servo control Provide 2 general PWM Tray control can be PWM output or digital output Built in DSP for digital s...

Page 23: ...ding MPEG 2 layer1 layer2 2 channel audio decoding Dolby Pro Logic decoding High Definition Compatible Digital HDCD decoding Up to 6 channel linear PCM output for DVD Audio DVD Video Downmix function...

Page 24: ...analog circuitry 12 FOO Analog Output Focus servo output PDM output of focus servo compensator 13 TRO Analog Output Tracking servo output PDM output of tracking servo compensator 14 TROPENPWM Analog...

Page 25: ...digital circuitry 36 AD3 Inout 2 16MA SR Microcontroller address data 3 37 AD2 Inout 2 16MA SR Microcontroller address data 2 38 AD1 Inout 2 16MA SR Microcontroller address data 1 39 AD0 Inout 2 16MA...

Page 26: ...3 Power 3 3V Power pin for audio clock circuitry 56 ALE Inout 2 16MA SR PU SMT Microcontroller address latch enable 57 IOOE Inout 2 16MA SR SMT Flash output enable active low IO 58 IOWR Inout 2 16MA S...

Page 27: ...strobe active low 76 URD Inout 2 16MA SR PU SMT Microcontroller read strobe active low 77 DVSS Ground Ground pin for internal digital circuitry 78 RD7 Inout DRAM data 7 79 RD6 Inout DRAM data 6 80 RD...

Page 28: ...pin for internal digital circuitry 103 CLK Output 2 16MA SR DRAM clock 104 CLE Output 2 16MA SR DRAM clock enable 105 RA11 Output 2 16MA SR DRAM address bit 11 or audio serial data 3 channel 7 8 106...

Page 29: ...125 DVSS Ground Ground pin for internal digital circuitry 126 RD31 Inout 2 16MA SR PU PD SMT DRAM data 31 127 RD30 Inout 2 16MA SR PU PD SMT DRAM data 30 128 RD29 Inout 2 16MA SR PU PD SMT DRAM data...

Page 30: ...tA 1 147 RD16 Inout 2 16MA SR PU PD SMT DRAM data 16 Videoin Data PortA 0 148 ABCK Output 4MA Audio bit clock 149 ALRCK Inout 4MA PD SMT 1 Audio left right channel clock 2 Trap value in power on reset...

Page 31: ...hroma output 165 DACVDDB Power 3 3V power pin for VIDEO DAC circuitry 166 YUV2 Y Output 4MA SR Video data output bit 2 167 DACVSSB Ground Ground pin for VIDEO DAC circuitry 168 YUV3 CVBS Output 4MA SR...

Page 32: ...tput RF serial clock output 198 BDO Input Flag of defect data input status 199 ADCVSS Ground Ground pin for ADC circuitry 200 ADIN Analog Input General A D input 201 RFSUBI Analog Input RF subtraction...

Page 33: ...194 195 196 197 198 199 200 201 202 YUV4 G YUV6 R YUV7 RFRP_DC FEI RFLEVEL HRFZC PRST VFO13 DVDD3 DVSS IDGATE SDATA DVDD3 CSO PWM2VREF BDO UDGATE SDEN WOBSI SLCK TEI PWMVREF ADIN RFSUBI TEZISLV DVDD2...

Page 34: ...es interface between the input servo signals and the Servo DSP It has built in ADCs to digitize the servo control signal and DACs to provide signals for the actuator and sledge motor It also has a ser...

Page 35: ...Saturation adjustment and edge enhancement Reading and decoding SPU and OSD data from DRAM buffer Generating hardware cursor image Merging the video data SPU OSD and cursor Video Processor The Video P...

Page 36: ...tream Audio Interface Audio interface consists of Audio Output Interface and Microphone Input Interface Audio Output Interface The MT1379 can support up to 8 channel audio outputs The output formats c...

Page 37: ...A Analog Supply voltage 0 3 to 3 6 V VIN Input Voltage 0 3 to 5 5 V VOUT Output Voltage 0 3 to VDD3 0 3 V Ta Ambient Temperature 0 to 70 C DC Charateristics Symbol Parameters Min Typ Max Unit VIH Inpu...

Page 38: ...be read from or programmed into any sector not being erased n Sector Protection Any combination of sectors may be locked to prevent program or erase operations within those sectors n Temporary Sector...

Page 39: ...A 18 0 A 1 VCC DETECTOR TIMER ERASE VOLTAGE GENERATOR AND SECTOR SWITCHES PROGRAM VOLTAGE GENERATOR ADDRESS LATCH X DECODER Y DECODER 8 Mb FLASH MEMORY ARRAY Y GATING DATA LATCH I O BUFFERS I O CONTR...

Page 40: ...29 48 47 46 45 28 27 26 25 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1 2 3 4 21 22 23 24 A11 A10 A9 A8 NC NC WE RESET NC NC RY BY A18 A17 A7 A6 A5 A15 A14 A13 A12 A4 A3 A2 A1 DQ7 DQ14 DQ6 DQ13 DQ5 DQ...

Page 41: ...o m m a n d B u r s t l e n g t h o f 1 2 4 8 o r f u l l p a g e a n d t h e b u r s t c o u n t sequence sequential or interleave A burst of read or write cycles in progress can be terminated by a...

Page 42: ...o p e r a t i o n Refer function truth table for details L D Q M U D Q M D a t a I n p u t O u t p u t M a s k D Q M c o n t r o l o u t p u t b u f f e r i n r e a d m o d e a n d m a s k i n p u t...

Page 43: ...SEG16 VCC KEY4 KEY3 KEY2 KEY1 25V FIL FIL SEG1 SEG2 VFDST VFDCK VFDAT IR GND GND C405 104 R415 100 IR VCC R405 33K R401 33K R402 33K R403 33K R404 33K R406 10K R407 10K R408 10K R409 10K R410 10K R411...

Page 44: ...42 FRONT SCHEMATIC DIAGRAM...

Page 45: ...10V TC509 1000uF 10V TC510 1000uF 10V 2 3 4 1 5 CN501 XS05 D508 HER105 C507 101 TC503 470uF 16V R511 220R 1W FB 4 GND 1 D 2 VCC 3 U501 5L0380R R507 10K R504 1M R501 680K 1 2W 2 3 4 1 5 6 CN502 XS06 V...

Page 46: ...44 POWER BOARD SCHEMATIC DIAGRAM...

Page 47: ...R602 22K R629 27K TC605 22uF 16V TC603 4 7uF 16V TC606 22uF 16V TC604 4 7uF 16V TC601 4 7uF 16V TC602 4 7uF 16V 9VA C619 102 R628 4 7K R620 10K R633 10R 0 25W TC615 100uF 25V C601 104 R632 10R 0 25W T...

Page 48: ...OK SCHEMATIC DIAGRAM 46...

Page 49: ...11 12 14 15 16 13 17 18 20 21 22 19 23 24 25 26 28 27 XS701 XS28 Y C TC702 220uF 16V TC703 220uF 16V TC704 220uF 16V L712 FBSMT L711 FBSMT TC706 220uF 16V TC705 220uF 16V Y C 1 2 3 4 5 6 7 8 9 10 11 1...

Page 50: ...48 OUTPUT BOARD SCHEMATIC DIAGRAM...

Page 51: ...MD11 LDO2 LDO1 R304 10K R303 10K R305 10K R306 10K TRCLOSE TROPEN ENDM STBY C322 104 C320 104 C321 104 TC305 47uF 16V C324 104 C327 104 C325 104 C326 104 RVCC RVCC C338 104 C339 104 2 3 4 1 5 6 8 9 10...

Page 52: ...C2151 104 C2150 104 TC203 10uF 16V A5V VGND L243 0R L244 0R L245 0R L246 0R L247 0R L248 0R Q215 3906 S Q217 3906 S Q216 3906 S Q213 3906 S Q220 3906 S Q214 3906 S 5V GND VIDEO_U GND VIDEO_V GND VIDE...

Page 53: ...RD4 81 DVDD2 82 RD3 83 RD2 84 RD1 85 RD0 86 RWE 87 CAS 88 RAS 89 RCS 90 BA0 91 DVSS 92 RD15 93 RD14 94 RD13 95 RD12 96 DVDD3 97 RD11 98 RD10 99 RD9 100 RD8 101 DVSS 102 CLK 103 CLE 104 DMVSS 109 RA7 1...

Page 54: ...R2116 100K Q210 2SC1815 YS Q209 2SC1815 YS C278 104 C279 104 C280 104 9V AGND C281 104 C282 104 C283 104 9V AGND SDATA2 SDATA1 SDATA0 SLRCK SACLK SBCLK SCL SDA RST LL RS RR LS LFE C R2132 20K C2116 1...

Page 55: ...53 MIAN SCHEMATIC DIAGRAM...

Page 56: ...54 MIAN SCHEMATIC DIAGRAM...

Page 57: ...R2147 R2150 R2151 15 SMD RESISTOR 1 16W 6 8K 5 6 R2136 R2148 R2152 R2155 16 SMD RESISTOR 1 16W 8 2K 5 1 R201 17 SMD RESISTOR 1 16W 10K 5 12 R206 R250 R265 R303 R306 R309 R311 R319 R339 R2157 18 SMD RE...

Page 58: ...C214 8 42 SMD CAPACITOR 50V 122 10 0603 6 C2122 C2129 C2130 C2133 C2135 C2136 43 SMD CAPACITOR 50V 103 10 0603 4 C212 C215 44 SMD CAPACITOR 50V 153 10 0603 3 C220 C308 C319 45 SMD CAPACITOR 16V 333 10...

Page 59: ...SISTOR 1 4W33 5 SHAPED 10 1 R505 2 CARBON FILM RESISTOR 1 4W330 5 SHAPED 10 1 R506 3 CARBON FILM RESISTOR 1 4W10K 5 SHAPED 10 1 R507 4 CARBON FILM RESISTOR 1 4W4 7K 5 SHAPED 10 1 R510 5 CARBON FILM RE...

Page 60: ...4 3 5 4 TC505 TC506 TC509 TC510 22 2 CD GS 10V1000U 20 8 16 3 5 4 TC505 TC506 TC509 TC510 22 3 CD GS 10V1000U 20 8 14 3 5 4 TC505 TC506 TC509 TC510 23 CD LP3 400V47U 20 22 28 10 1 TC501 23 1 CD LS 400...

Page 61: ...ONT PANEL PCB 2 SOFT SPONGE SPACER 10 10 5 5 DOUBLE FACED ADHESIVE TAPE HARD 1 CONNECT IR SENSOR WITH FRONT PANEL PCB 3 CARBON FILM RESISTOR 1 4W270 5 SHAPED 10 1 R419 4 CARBON FILM RESISTOR 1 4W2 2 5...

Page 62: ...601 U602 12 IC PT2399 DIP 1 U603 13 FLAT CABLE 6P80 2 5 2 PLUG WITH NEEDLE 1 XS601 15 MIC SOCKET CK3 6 35 106 2 MIC601 MIC602 16 CONNECTION CORDS 0 6 SHAPED 7 5mm 5 JP601 JP605 17 SMD RESISTOR 1 16W 5...

Page 63: ...LAIN CAPACITOR 50V 104 20 5mm 3 C710 C711 C713 13 1 PORCELAIN CAPACITOR 50V 104 80 20 5mm 3 C710 C711 C713 14 TRIODE S8050D 3 V701 V703 15 CD CD11 16V220U 20 6 12 2 5 5 TC701 TC703 TC706 16 CD CD110 1...

Search results

Summary of Contents for BBK938S

Reviews:

Related manuals for BBK938S

Brands by name

Popular brands

BBK BBK938S, Service Manual

Search results

Summary of Contents for BBK938S

Reviews:

Related manuals for BBK938S

Brands by name

Popular brands