Pace MSS100 Series, Service Manual

Page 1: ...MSS100 Satellite Receiver Service Manual PACE 8 7...

Page 2: ...CHIP COMPONENTS GAINING ACCESS TO THE UNIT CIRCUIT DESCRIPTION MAIN BLOCK DIAGRAM TUNER AND VIDEO PROCESSING UHF MODULATOR SWITCH MODE POWER SUPPLY CONTROL C RCUITRY AND DISPLAY DEMODULATION AND DE EM...

Page 3: ...manual VIDEOCRYPT CIRCUIT DESCRIPTIONS AND DIAGRAMS The MSS 109 1 contains VideoCrypt circuitry For copy right reasons the circuit description and diagrams for this have been printed on special paper...

Page 4: ...0v MSS 100 PCB 299 1000200 Hand modification to the VideoCrypt circuit ECO 001059 This modification adds a capacitor to decouple the bottom reference voltage A decoupling capacitor is added across pin...

Page 5: ...Baseband Output Audio Video Input Output RGB in Phono 2 pin reversible IEC female IEC male Single F type MSS100 1 Dual F type MSS138 G 700 2150 MHz Vertical 12 0 14 0 V Horizontal 17 0 20 0 V at 0 40...

Page 6: ...AV Status Out 9 Green Ground 10 Not connected 1 Green Out 12 Not connected 13 Red Ground 14 Ground 1 2 3 4 5 Blue Ground 6 7 8 15 Red Out 16 RGB Status Out 17 Video Ground 18 Ground 19 Video Out 20 N...

Page 7: ...to move beck up the To display programme menus to previous menus information GED 7 select satellite radio To store changes and leave NORM MUTE programmes menu to return to a satellite VOL programme b...

Page 8: ...8 AV Source Auto 7 Name MOVIE CHAN 2 Audio Stereo A 8 Frequency L 7 02 4 R 7 20 5 De emphasis Panda Bandwidth 190kHz 7 Category Films 8 Skip off 9 Satellite 4 9 More Use the number keys to move down...

Page 9: ...e manufacturer s instructions until a good quality picture of the UHF Tuning Menu is visible Press NORM to renove the UHF Tuning Menu from the screen You should now see a satellite TV programme Set yo...

Page 10: ...stalled and that the lead from the LNB is connected to Input 1 of your receiver aD distorted background plain coloured background 7 F AFC Input 1 Offset AFC Power On 00 Dish Steerable Poleriser Magn M...

Page 11: ...eiver On power to the LNB from the receiver if On is set at both Input Menus power goes only to the LNB which is receiving the current programme Setting the dish type The Dish option allows you to inf...

Page 12: ...e see below The numbers in the LNB Band names are the frequencies in GHz of the LNB s local oscillator The second column shows the frequency range over which you should tune at the Set Up Programme Me...

Page 13: ...you which programme is currently being transferred Download takes about 15 seconds When the message Download Complete appears disconnect the receiver you have downloaded to Press STORE to return to th...

Page 14: ...s and the board never bend or flex boards Oo not heat or cool the boards unnecessarily as the board materials Seneen expand and contract by differing amounts which can cause the components and solder...

Page 15: ...am on page 20 The error signal from the phase locked loop pulses on pin 14 of U100 is integrated by Q100 and associated components These determine how much of the 30 V supply appears as the tuner cont...

Page 16: ...s called PAL since it is PAL de emphasised This signal also exits U500 at pin 15 andis filtered by L501 L502 and associated components This then passes through a sound trap comprising L500 and associa...

Page 17: ...2 C609 and C610 This is used together with horizontal and vertical sync pulses to generate the characters and their Positions on the screen For the superimposed on picture mode the horizontal and vert...

Page 18: ...ram of which is shown on ps 18 It comprises the following a pha locked loop frequency synthesiser that covers the full UHF Sand anar stitude modulator to modulate the UHF carrier with the video an au...

Page 19: ...CHARGE PUMP BANDWIDTH 31 25 kHz The port output bit on pin 14 of U200 is used to control the bandwidth of the tuner Since this pin is an open collector output it must have a pull up resistor R112 to f...

Page 20: ...to provide power for U500 and U302 as well as some of the video circuitry The 22 V is used for the horizontal LNB supply the 30 V is used to provide tunir2 volts for the modulator U200 and for the tu...

Page 21: ...generator IC U600 acts as a port expander for the control lines TV_PIN_8 and TV_PIN_16 the modulator chip U200 acts as a port expander for the control line bandwidth Control Lines A block diagram of t...

Page 22: ...s when two subcarriers spaced by 180 kHz are input to the PLL The CPUMP pins 49 and 38 are the output of the frequency synthesiser which drives the voltage to pull the VCO to the target frequency As t...

Page 23: ...CHANNEL AUDIO BLOCK DIAGRAM FM MODULATION AUDIO R FOR JI7R u7sR 3 3 OUT R 2 OUTR DECODER STV0056 LEFT CHANNEL AUDIO BLOCK DLAGRAM FM DEMODULATION AUDIO L AUDIO DE EMPHASIS MSS 100 Series Satelit Rece...

Page 24: ...SAT DEC C542 for right channel and C529 for the left channel couple the signals from pins 14 and 12 respectively of U500 to the VCR SCART The signal level cannot be controlled by the volume rocker key...

Page 25: ...d into 5 sections Video Audio SMPS Control and VideoCrypt including some tests that can be per formed with the card reader circuitry It is important that within each of these sections you check the pr...

Page 26: ...t point 2 only the time axis is different there may be slight variations in the trace depending on picture content If the trace is not as shown check 12 V supplies on pins 17 and 45 of U500 5 V supply...

Page 27: ...00 see oscillogram 7 Test Point 5 LK600 similar to pin 8 of U600 see oscillogram 5A Description Trace 5B shows what to expect at test point 5 if there is a plain coloured background with graphics on t...

Page 28: ...n with graphics e g Main Menu and look for trace 8B If the trace is not as shown or has the wrong ampli tude check Q601 and associated circuitry Test Point 8 Pin 19 of SK3 TV SCART similar to pin 8 of...

Page 29: ...for the right channel C527 and left C528 before they pass to the phono outputs and to the TV SCART The signal should be biased around 0 V so ensure that the trace is produced with 0V at the centre of...

Page 30: ...change the programme number The SERIAL_CLK line on pin 40 of U700 should be similar Press the number keys while looking for the trace If the trace is not as shown check 700 and any of the ICs on the s...

Page 31: ...the sync separator U303 Check the DC level which should be approx 1 8 V black level if the black level is not 1 8 V check that the signal is AC decoupled by C331 by checking that the voltage is diffe...

Page 32: ...e 27 V switched supply is present at pin 3 of U305 and 12 Vis at pin 7 of U305 if the 27 V is absent eeuoeucese check Q314 and Q315 VideoCrypt circuit diagram and 8 2 6 that the reset line at LK333 on...

Page 33: ...6 LKBI2 G7 Quo2 E28 R33 HB ee G5t e505 F54 ois aw 1300 Gs 1K326 15 L813 19 Qos 28 RM HBT 26 a ee C306 ES 700 K8 1301 G6 1K327 14 LKB14 G8 Qi04 F2ts R35 HBF poles See oc meee 1302 E4 1328 KS LKBIS KB Q...

Page 34: ...T R390 15F R514 E4t R613 BO R802 F7 TUNIO0 C4 R305 GGT R348 J8t R391 15 R515 ESt R614 BS t R803 HO YDRI C11 R306 Gt R349 JOT R392_IS R516 E4t ROIS BET RBO4 SF 2100 Fe R307 HS R350 J8 R393 IS RS17 E4 R...

Page 35: ...15 LK800 LK801 LK802 1803 LKB04 LKB05 LKB06 LK807 LK808 LKB09 LK810 Lk811 LK812 LK813 LKBI4 LKB15 LK816 LK817 LK818 Lk819 LK820 1LKB21 LK822 UK823 LK824 LK825 LK826 1LK827 LK828 LK829 1K830 1LK831 LK8...

Page 36: ...COG 0805 TA 950 1025501 211_ SMD 100NF 25V 2 CER CAP YSV 0805 TR 950 1042951 cat2 C213 cata cis C216 c2i7 cate C220 C221 222 C223 C224 0225 226 227 300 304 302 C303 C304 305 306 307 308 309 C310 c3tt...

Page 37: ...F 50V 5 CER CAP COG 0805 TR 950 1025501 010 UF5402 200V RECT DIODE TR 120 0540201 C526 SMD 100NF 25V 2 CER CAP YSV 0805 TR 950 1042951 11 UF5402 200V RECT DIODE TR 120 0540201 0527 10UF SOV 20 SMM AD...

Page 38: ...902 R9 SMD 10K 0 1W 5 RES 0805 TR 940 1010501 J301 TINNED C2 ER WIRE LINKS 0 61MM DIA 999 1099902 R10 1K 0 25W 5 CARBON FILM RES TR 140 10 2501 J302 TINNED C2 PER WIRE LINKS 0 61MM DIA 999 1099902 R11...

Page 39: ...0805 TR 940 1030501 i F303 SMD 120R 0 1W 5 RES 0805 TR 940 1210501 R372 SMD 10K 0 1W 5 RES 0805 TR 940 1030501 F304 SMD 100R 0 1W 5 RES 0805 TR 940 1010501 F373 SMD 10K 0 1W 5 RES 0805 TR 940 1030501...

Page 40: ...0 1050501 R803 SMD ORO 0 1W LINK 0805 TR 940 0001501 R519 SMD 1M0 1W 5 RES 0805 TR 940 1050501 F804 SMD ORO 0 1W LINK 0805 TR 940 0001501 R520 SMD 47K 0 1W 5 RES 0805 TR 940 4730501 F805 SMD ORO 0 1W...

Page 41: ...TR 950 3805501 R119 SMD 4K7 0 1W 5 RES 0805 TR 940 4720501 C543 SMD 100R 0 1W 5 RES 0805 TR 940 1010501 R120 SMD 4K7 0 1W 5 RES 0805 TR 940 4720501 C615 SMD 330PF S0V 5 CER CAP COG 0805 TR 950 3315501...

Page 42: ...d the base of the unit Gently twist the flat bladed tool to unhook the plastic retaining clip from the chassis ledge Simultaneously use your thumb to gently prise the lid away from the base Repeat for...

Page 43: ...ction Static Threshold Energy Dispersion Removal SCART CONNECTORS Video Output Level Video Output impedance Video Frequency Range Video De emphasis PAL Baseband Output Level Baseband Frequency Range B...

Page 44: ...imum blade width must be 6 mm between the retaining clip and its corresponding ledge Place your thumb in the groove that separates the lid and the base of the unit Gently twist the flat bladed tool to...

Page 45: ...ut NCR BET CLAMP FROM DG00 S zl of EXT DECODER RETURN _ gS 2 ge 2 S Gs z 5 S OF BLACK LEVEL a ADJUST TVIVCR DECODER SCART i DER VIDEO O80 Ls 7 SEE U600 X600 19 SEPARATE DIAGRAM 6 ht Dec scart y VCR S...

Page 46: ...lity agreement and should 7 not be disclosed to any third party without TCE s prior written agreement Copy is strictly prohibited THOMSON CONSUMER ELECTRONICS seria N2 M 100033 eee sr ai us alt Bea ee...

Page 47: ...S 3 D3 ire on the main Videocry 500 to the main of U500 Sync Separato The video inp merges at pin 13 an 9310 Q312 C33 1302 the sync separa muses Ceramic resond horizontal and vert ic pulses in the abs...

Page 48: ...K617_ BG R27 R389 cis Hoy D303 17 LK618 7 R28 R300 cis 1104 D304 17 LKG19 BO Fy F R29 R301 C16 110 D305 13 1K620 B7 30 R392 C17 Ho D306 13 1K700 K6 2 RBL R393 cis Hine 307 13 LK701 K6 i a t 12 R395 Js...

Page 49: ...Li 12 3 4 1S 16 7 18 19 cu BIO 9 iit 10 10 it ut 2 Ql Gs Q2 EB Q3 EST Qi Got Qs GBF QO GBF Q7 G7t Qa FTE Qo B Q100 F3 QUoL CHF 102 2 Q103 2 Quod 2 QU05 3 Q106 E2 QU07 B2t 200 C34 Q300 Gt Q301 Got Q30...

Page 50: ...310 H7 R6o2 3083 Got Quoz LK7 uxsse 0 f sf fi ae R3LL GOT R603 306 HG Q103 LK100 C3 LKB59 19 Be H i R312 G4t ROO4 307G5 Quod LKION FS LKBGO C6 aA ate R313 G4t ROOS C308 HG Q105 LK105 3 LK861 D7 G an O...

Page 51: ...PINS H Seen 3 1 vec L607 R608 LNB 09 a ws gots 19 snso1e37 Ex orc ens L 2 Cay j sores Fore 1 ns sec woot 5 Lose A 060sf eezo io eee jon sper Le J pd c I2 4 Pg IO So oe eS J Lh606 ROIS o eee ae PLEOI S...

Page 52: ...x22 xe23 Kaze Kes UKB26 827 R800 R801 R802 R803 04 805 808 R807 R808 R809 P80 Te801 av 1828 Lxez9 K830 Kes K832 Lxe33 1802 3 Lxase Lka38 KB36 837 R610 Ren a5y Lxe38 KES Leen KSAT Lxeez Uses Urees Uxse...

Page 53: ...S voor octer uF BANDWIDTH av tos 3e OPTION euvoworm ase vestucer 1500 0600 C858 600 R600 jerzr 3308 Rng a rewor teo700 stay LeD RED sav aad_REF av uw R526 x0 0500 653 Bese 6F Z Lc0701 wReUED 1x70 Lx70...

Page 54: ...rer tt a desu Lad AUXOUTR AGNOL 1000F C512 VCR OUT LR 43 Boor oe _ _ __ 16v oF cso ewout Accr oon P53 i Seon 23 Se Boor 508 so aweuxet Test S2oF wise Ae 560K ne 534 533 ex vav ust seer 12v17 v7 R536 T...

Page 55: ...f fam coor voor T 12 e SM WS51095 7 whe i me ee 3 D sn wl Ls i Shy a Hie Toa Tae ear ww jon us Lw7812 oo 14907 1N4007 caunOW ole le vores M F Nor FurreD ALL IN I4B SIGNAL DIODE 75UA 75V UNLESS OTHERWI...