Sony WRT-800A Service Manual Download Page 2 | Manualshive

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WARNING

This manual is intended for qualified service personnel
only.
To reduce the risk of electric shock, fire or injury, do not
perform any servicing other than that contained in the
operating instructions unless you are qualified to do
so. Refer all servicing to qualified service personnel.

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Summary of Contents for WRT-800A

Page 1: ...WRT 800A SERVICE MANUAL AU Model ...

Page 2: ...d service personnel only To reduce the risk of electric shock fire or injury do not perform any servicing other than that contained in the operating instructions unless you are qualified to do so Refer all servicing to qualified service personnel ...

Page 3: ...equency Deviation Adjustment 3 5 3 2 5 Distortion Ratio Check 3 6 3 2 6 S N Check 3 7 3 2 7 Frequency Characteristics Check 3 7 3 2 8 RF Power Output Adjustment 3 8 3 2 9 Tone signal Adjustment 3 8 3 2 10 Battery Alarm Signal Check 3 10 3 2 11 Spurious Emissions Check 3 11 4 BLOCK DIAGRAM 5 SEMICONDUCTOR PIN ASSIGNMENT 6 SCHEMATIC DIAGRAMS AND BOARD LAYOUTS 6 1 Board Layouts 6 1 6 2 Schematic Diag...

Page 4: ...power amplifiers or in a place subject to direct sunlight or excessive moisture In such places the external finish or internal parts of the unit may be damaged If the unit is used in a very humid or dusty place or in a place subject to an active gas clean its surface as well as the connectors with a dry soft cloth soon after use Lengthy use of the unit in such places or not cleaning it after its u...

Page 5: ... 800 625 66 13 793 750 67 13 800 750 66 14 793 875 67 14 800 875 66 15 794 000 67 15 801 000 66 16 794 125 67 16 801 125 66 17 794 250 67 17 801 250 66 18 794 375 67 18 801 375 66 19 794 500 67 19 801 500 66 20 794 625 67 20 801 625 66 21 794 750 67 21 801 750 66 22 794 875 67 22 801 875 66 23 795 000 67 23 802 000 66 24 795 125 67 24 802 125 66 25 795 250 67 25 802 250 66 26 795 375 67 26 802 375...

Page 6: ... moved in the direction of the arrow 1 the switch cover is raised up Switch cover Stick light Switch knob Grip B LR small screw Remove the grip B straight out in the direction of the arrow Grip B Nameplate 1 Stop ring pliers Sony part number 7 721 010 07 Type C stop ring Adjustment ring Adhesive seat ring 3 pin connector Tweezers Pad rubber Inner Net Capsule ass y Harness Unsolder White Red Capaci...

Page 7: ...Chassis B Claw Switch label Claw Chassis A AU 258 board A Side L202 Claw AU 258 board A Side Unsolder Remove the board so as not to break the claws AU 258 board AU 258 board B Side Unsolder P 1 7x2 ANT terminal relay Chassis A Battery coil spring Battery coil spring Lug ø2 Battery seal Chassis A Claw O ring Plate stick Magnet Plus polarity terminal plate Press down the dented portion in the center...

Page 8: ...f material which is fragile to heat Avoid applying high temperature for extended period during soldering Tip of the positive polarity terminal plate L202 Solder here Chassis A Be careful not to pinch the harness between the chassis A and the AU 258 board Align the 4 cut outs of the board with the 4 protrusions as shown by the arrow and attach the AU 258 board under the 3 claws shown by the asteris...

Page 9: ...apsule ass y White Red Harness Black Solder here Capsule ass y Harness Pad rubber Stop ring pliers Sony part number 7 721 010 07 Type C stop ring Type C stop ring Insert the pad rubber to the deep end without any clearance Attach the capsule ass y without any clearance Grip B Type C stop ring Ferrite Bead Inner Net Capsule ass y Ferrite Bead Inner Net Insert the AU 258 board harness and the 2 pin ...

Page 10: ...NSOR Range 3 uW to 100 mW HP453B Power sensor HP8482A or equivlent AUDIO ANALYZER OSCILLATOR 20 Hz to 100 kHz HP8903B with A weighted DISTORTION ANALYZER S N METER LEVEL METER FREQUENCY COUNTER Frequency 10 Hz to 1000 MHz HP5358A or equivalent Effetive digits 10 digits OSCILLOSCOPE Frequency DC to 10 MHz _ DC VOLT METER Effective digits 3 1 2 digits _ Tools Name Part No Remarks RF adjusting connec...

Page 11: ...0 Sub harness 3P 1 Part No 1 956 140 11 3 2 Adjustment This section describes adjustments and checks which must be completed to assure that the specificatisons are complied with Make adjustment and checks following the procedure below 3 2 3V Vcc Regulated Voltage Check Carrier Frequency Adjustment Reference Frequency Deviation Adjustment Maximum Frequency Deviation Adjustment Distortion Ratio Chec...

Page 12: ...hecking After the DC power supply connection is complete set the power switch S201 AU 258 board to on and check the level on DC current meter DC current meter indication level 70 to 90 mA 2 Adjustment Location 3 3 SMA BNC conversion connector RF adjusting connector RF 87 board B side AU 258 board A side Harness CN302 CN401 CN401 Solder DC power supply DC current meter Lead wires 30 to 80 mm _ _ DC...

Page 13: ...ounter Adjustor SONY part No 7 721 052 81 RF adjusting connector See page 3 2 Switch and control setting S301 S302 S303 S304 RF 87 board A side WRT 800A S301 S302 S303 S304 Channel setting AU66 model _ 0 1 OFF 67 01 Connections For connecting the DC power supply refer to the Prepa rations on page 3 3 Procedure 1 Connect the frequency counter to the CN401 RF 87 board RF adjusting connector 2 Adjust...

Page 14: ...iation 5 kHz 0 1 kHz Adjustment 1RV104 AU 258 board A side 3 After the adjustment has been completed perform the 3 2 4 Maximum Frequency Deviation Adjustment 3 2 4 Maximum Frequency Deviation Adjustment n Be sure to perform this adjustment after 3 2 3 Reference Frequency Deviation Adjustment has been completed Equipment and Tools DC power supply DC output voltage 1 5 0 1 Vdc DC current meter Audio...

Page 15: ...analyzer reading meets the following specification Specification Frequency deviation maximum Adjustment 1RV102 AU 258 board A side 3 Input 1 kHz _7 5 dBV _5 3 dBm signal to the CN101 AU 258 board with AF input connector 4 Adjust 1RV101 so that the frequency deviation for the modulation analyzer reading meets the following specification Specification Frequency deviation 26 kHz 0 5 kHz Adjustment 1R...

Page 16: ...atio Check expect the following setting Modulation analyzer MEASUREMENT RANGE 40 kHz Switch and control setting S301 S302 S303 S304 RF 87 board A side WRT 800A S301 S302 S303 S304 Channel setting AU66 model _ 0 1 OFF 67 01 Connections Same as 3 2 5 Distortion Ratio Check Procedure 1 Connect the audio analyzer level meter to the AF OUT connector for the modulation analyzer 2 Set the audio analyzer ...

Page 17: ...de 3 Adjust 1RV401 so that the power meter reading meets the following specification Specification Power meter reading 5 0 0 2 mW Adjustment 1RV401 RF 87 board B side 3 2 9 Tone signal Adjustment Equipment and Tools DC power supply DC output voltage 1 5 0 1 Vdc DC current meter Frequency counter Spectrum analyzer Modulation analyzer RF adjusting connector See page 3 2 1 Frequency deviation adjustm...

Page 18: ...the DC power supply refer to the Prepa rations on page 3 3 Switch and control setting S301 S302 S303 S304 RF 87 board A side WRT 800A S301 S302 S303 S304 Channel setting AU66 model _ 0 1 OFF 67 01 Procedure 1 Set the modulation analyzer as below MEASUREMENT FM MEASUREMENT RANGE 40 kHz HPF 4 kHz LPF 20 kHz DE EMPHASIS OFF 2 Check that the frequency counter resolution 0 1 Hz setting reading is 32 76...

Page 19: ... below CENTER FREQUENCY fc 799 250 MHz REFERENCE LEVEL 20 dBm FREQUENCY SPAN 200 kHz 20 kHz DIV RBW resolution band width 3 kHz VBW video band width 1 kHz ATT 20 dB 2 Decrease gradually the DC output voltage of the DC regulated power supply and confirm that the battery alarm signal turns on at 1 V 0 1 V 3 Check that level difference between carrire frequency center frequency level on spectrum anal...

Page 20: ...e jumper wire between TONE and GND on the AU 258 board 3 11 RF adjusting connector SMA BNC conversion connector RF 87 Board B side AU 258 Board A side Modulation analyzer Frequency counter RF IN AF OUT Connect a jumper wire between TONE land and GND land by soldering TONE signal OFF TONE 3 2 11 Spurious Emissions Check Equipment and Tools DC power supply DC output voltage 1 5 0 1 Vdc DC current me...

Page 21: ...z REFERENCE LEVEL 10 dBm FREQUENCY SPAN 5 GHz or Full span 500 MHz DIV RBW resolution band width 300 kHz ATT 20 dB 2 Check that the spurious emissions level reading for the spectrum analyzer remains less than _40 dBm 10 dBm _40 dBm V 10 dB div H 500 MHz div 5 GHz 2 5 GHz fc Carrier frequency ...

Page 22: ... 1 4 λ HELICAL CPU POWER LR6 x 1 4 0MHz IC301 IC303 RESET IC304 305 Q301 POWER CONTROL Q203 D201 202 VOLTAGE COMPARATOR IC306 307 1 5V Vcc1 3V Vcc2 3V VOLTAGE CONTROLER DC DC CONVERTER IC201 Q201 202 Q402 403 D403 S201 S301 S302 BATTERY CHANNEL SELECT SWITCH EEPROM IC302 X301 CN101 LIMITTER IC103 104 Q101 D101 RV101 VCO CP401 CLAMPER Q102 103 D102 103 RV102 LPF Q104 X TAL OS C BUFFER IC105 2 6 6 6...

Page 23: ...OFF state of the POWER switch S201 and sends the detection signal to CPU IC301 This is done to turn off the tone signal before the RF carrier signal is turned off The power supply voltage 3 V VCC for circuit is turned off about one second after the POWER switch S201 is switched to OFF position Battery indicator IC306 always monitors the battery voltage When the battery voltage drops to 1 0 V IC306...

Page 24: ...IEW MA133 MA133 TX TOP VIEW MA729 MA729 TX B E E C TOP VIEW WIDE 2SC5015 T1 LBR3378S TP J161K RED TOP VIEW 2SC4919 2SC4919 TL 2SD1328 RST 2SD1328 RST TX 2SD2216 Q TOP VIEW TOP VIEW S 2SD1620 2SD1620 TD 2SK377 A 2SK377 B TOP VIEW R1 R2 TOP VIEW R1 R2 TOP VIEW 5 1 4 3 2 R1 R2 R2 R1 5 4 3 1 2 DTA143ZE TL R1 4 7 K R2 47 K DTA144EE R1 47 K R2 47 K DTA144EE TL R1 47 K R2 47 K DTC143ZE TL R1 4 7 K R2 47 ...

Page 25: ...R COMPANDOR TOP VIEW 20 19 18 17 φR φP TEST PLL FREQUENCY SYNTHESIZER 1 1 GHz BAND TOP VIEW 16 15 14 13 Do2 FC LAT DATA PS CK 1 2 3 4 5 6 7 8 9 10 12 11 OSCI OSCO Vp Do1 LD FIN PHASE COMPARATOR PROGRAMMABLE COUNTER PULSE SWALLOW PROGRAMMABLE COUNTER CHARGE PUMP 1 CHARGE PUMP 2 SHIFT RESISTOR LATCH φR φP TEST Do2 LAT FC PS DATA CK OSCI OSCO Vp Do1 LD FIN 1 3 4 6 10 8 15 12 13 11 17 16 20 18 14 REFE...

Page 26: ... RN5VT09AA TL RN5VT09AA TR RICOH S 80720SN DH T2 SEIKO I AND E S 80727SN DQ T2 SEIKO I AND E TC4069UBF EL RCA TC4S11F TOSHIBA CHIP PACKAGE TC4S11F TE85R TC4W53FU TOSHIBA CHIP PACKAGE TC4W53FU TE12R TC7WU04FU TE12R TOSHIBA CHIP PACKAGE C MOS VOLTAGE DETECTOR TOP VIEW GND VDD OUT 1 2 3 2 VDD GND OUT 1 3 NC 4 NC 5 3 2 1 OUT VDD GND VOLTAGE DETECT C MOS 2 INPUT NAND GATE TOP VIEW TYPE 1 2 GND 3 7S00F ...

Page 27: ... RTS OUT Communication 37 I F TXD OUT Communication 38 I F RXD IN Communication PIN SIGNAL I O DESCRIPTION 42 CH1 1 IN CH1 1 43 CH1 2 IN CH1 2 44 CH1 4 IN CH1 4 45 CH1 8 IN CH1 8 46 TV IN TV 51 CLK OUT Clock for PLL EEPROM 52 LAT OUT PLL latch 53 RFM OUT RF Muting 54 LD IN Lock detection for PLL 55 CS OUT Chip select for EEPROM 56 DATA OUT Data for PLL EEPROM 57 DO IN Data for EEPROM 58 VCC IN Pow...

Page 28: ......

Page 29: ... WHT BLK _ LR6 PLUS TERMINAL MINUS TERMINAL ANTENNA MOD AFM ID LVD POFF VCC GND 32K BAT AA MOD AFM ID LVD BAT AA POFF VCC GND 32K To CN103 L202 1 uH RF 87 BOARD A SIDE BOARD NO 1 668 098 11 RF 87 BOARD B SIDE BOARD NO 1 668 098 11 AU 258 BOARD A SIDE BOARD NO 1 668 097 11 AU 258 BOARD B SIDE BOARD NO 1 668 097 11 ...

Page 30: ...47k 1 16W J R151 100k 1 16W J R152 100k 1 16W J R155 4 7k 1 16W J R156 22k 1 16W R159 10k 1 16W J RV104 47k S201 C201 47 6 3V D201 MA729 TX D202 MA729 TX C202 10 4V NEO CAP Q201 2SD1620 TD T201 C203 0 0015 B R201 2 2k C204 0 022 25V B C205 47p CH Q202 2SD1328 RST TX R202 10 IC201 RH5RH303B T1 Q203 1 2 UMG8 TR Q203 2 2 UMG8 TR R203 100k R204 6 8k C206 68 6 3V L201 10µH C207 4 7 6 3V R205 100k C208 ...

Page 31: ...100k C309 0 01 25V B C412 22p 50V CH R308 100k IC302 AT93C46 10SI 2 7 E2 D403 MA133 TX R410 100k C416 10 4V TA A R350 100k 1 16W J Q302 2SC4738 YGR TE85 L R411 33 1 16W J C421 1000p 25V CH C420 22p 50V CH R412 27k 1 16W J R413 12k 1 16W J L403 8 2n C424 1 5p 50V CK Q404 2SC5015 T1 D402 MA132WK TX R415 10k 1 16W J L404 6 8n J Q405 2SC5015 T1 R417 4 7k 1 16W J CT401 3p 1 5P R414 0 C423 1000pF 25V CH...

Page 32: ......

Page 33: ...fer from those used for the unit These are because of parts common ality and improvement Parts list has the present standardized repair parts 3 Stock of Parts Parts marked with o at SP Supply Code column of the spare parts list may be not stocked Therefore the delivery date will be delayed 4 Units Representation The following represented units are changed or omitted in writing Units Representation...

Page 34: ...603 335 01 s COIL SPRING BATTERY 15 3 603 336 01 s SCREW LR TYPE 16 3 603 337 02 o SCREWDRIVER SW 17 3 603 339 01 o SCREEN 18 3 603 342 01 o P15 O RING 19 3 603 343 01 o MAGNET 20 3 603 344 01 s SHEET CHLORIDE VINYL 21 3 605 835 02 o RING ADJUSTMENT 22 3 605 836 02 o PLATE STICK 23 3 605 837 01 s RING SHEET ADHESIVE 24 3 605 838 01 s SHEET ADHESIVE 25 3 612 848 01 o LABEL SW 26 3 608 713 02 o GRIP...

Page 35: ... 3 WRT 800A AU 25 2 1 19 8 7 4 4 33 6 32 35 29 29 3 17 21 23 36 27 20 16 24 31 34 13 14 22 28 26 9 30 15 12 11 10 5 18 P 1 7X2 P 1 7X2 When using Lug 2 Part No 7 623 505 01 cut it Refer to section 2 2 1 ...

Page 36: ...PF 5 50V C150 1 135 181 21 s TANTALUM CHIP 4 7uF 10 6 3V C151 1 162 966 11 s CERAMIC CHIP 0 0022uF 10 50V C201 1 110 569 11 s TANTALUM CHIP 47uF 20 6 3V C202 1 115 167 11 s TANTALUM CHIP 10uF 20 4V C203 1 162 965 11 s CERAMIC CHIP 0 0015uF 10 50V C204 1 164 227 11 s CERAMIC CHIP 0 022uF 10 25V AU 258 BOARD Ref No or Q ty Part No SP Description C205 1 162 923 11 s CERAMIC CHIP 47PF 5 50V C206 1 107...

Page 37: ...BOARD RF 87 AU66 This assembly includes the following parts C301 1 162 921 11 s CERAMIC CHIP 33PF 5 50V C302 1 162 910 11 s CERAMIC CHIP 5PF 50V C303 1 162 970 11 s CERAMIC CHIP 0 01uF 10 25V C304 1 135 149 21 s TANTALUM CHIP 2 2uF 10 10V C305 1 135 201 11 s TANTALUM CHIP 10uF 20 6 3V C306 1 162 970 11 s CERAMIC CHIP 0 01uF 10 25V C307 1 162 970 11 s CERAMIC CHIP 0 01uF 10 25V C308 1 162 970 11 s ...

Page 38: ...2 1 216 837 11 s METAL CHIP 22K 5 1 16W R403 1 216 841 11 s METAL CHIP 47K 5 1 16W R404 1 216 845 11 s METAL CHIP 100K 5 1 16W R405 1 216 841 11 s METAL CHIP 47K 5 1 16W R406 1 216 817 11 s METAL CHIP 470 5 1 16W R407 1 216 821 11 s METAL CHIP 1K 5 1 16W R408 1 216 821 11 s METAL CHIP 1K 5 1 16W R409 1 216 841 11 s METAL CHIP 47K 5 1 16W R410 1 216 845 11 s METAL CHIP 100K 5 1 16W R411 1 216 803 1...

Page 39: ......

Page 40: ...Published by Global Support Promotion Dept Sony Corporation Broadcasting Professional Systems Company Printed in Japan 1998 1 16 1998 WRT 800A AU E 9 976 858 01 ...

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