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Sherwood RX-772, Service Manual

The Sherwood RX-772 Service Manual is available for free download from our website. This manual provides detailed instructions on how to properly maintain and repair your Sherwood RX-772 receiver. Ensure peak performance by referring to this essential manual. Download it today from manualshive.com!

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 REF  No.

Q'TY

PARTS No.

VER.

DESCRIPTION

 D135/D136

1SS133T, SWITCHING

2

K000013300520S

 D201-D203

1SS133T, SWITCHING

3

K000013300520S

 D301L/R

1SS133T, SWITCHING

2

K000013300520S

 D302-D305

1SS133T, SWITCHING

4

K000013300520S

 D307

1SS133T, SWITCHING

1

K000013300520S

G

 D308L/R

1N4148W, SWITCHING CHIP

2

K005041480020S

 D309L/R

1N4148W, SWITCHING CHIP

2

K005041480020S

 D310

IN4007, SWITCHING

1

K000400700520S

 D311L/R

1SS133T, SWITCHING

2

K000013300520S

 D312L

1N4148W, SWITCHING CHIP

1

K005041480020S

 D312R

1SS133T, SWITCHING

1

K000013300520S

 D313L/R

1SS133T, SWITCHING

2

K000013300520S

 D314L

1N4148W, SWITCHING CHIP

1

K005041480020S

 D314R

1SS133T, SWITCHING

1

K000013300520S

 D501

1SS133T, SWITCHING

1

K000013300520S

 D502

IN4007, SWITCHING

1

K000400700520S

 D503

1N4148W, SWITCHING CHIP

1

K005041480020S

 D505/D506

IN4007, SWITCHING

2

K000400700520S

 D507

1SS133T, SWITCHING

1

K000013300520S

 D514/D515

1SS133T, SWITCHING

2

K000013300520S

 D516-D519

IN4007, SWITCHING

4

K000400700520S

 D521/D522

IN4007, SWITCHING

2

K000400700520S

 D524

1SS133T, SWITCHING

1

K000013300520S

 DZ106

MTZJ3.3B-0.5W, ZENER

1

K06003R344520S

 DZ301/DZ302

MTZJ5.1B-0.5W, ZENER

2

K06005R144520S

 DZ501/DZ502

MTZJ6.2B-0.5W, ZENER

2

K06006R244520S

 DZ503

MTZJ12B-0.5W, ZENER

1

K06012R044520S

 DZ513/DZ514

MTZJ18B-0.5W, ZENER

2

K06018R044520S

INTEGRATED CIRCUITS

 IC201

UPD78F0536GK, CPU 

1

J020780536000S

 IC202

MC24C08, MEMORY-EEPROM

1

J000240860010S

 IC203

BU1924F, LINEAR RF

1

J124192400010S

G

 IC301

NJM5532M, LINEAR OP

1

J121553200030S

 IC501

KIA7805API, LINEAR-REGULATOR

1

J126780500110S

 IC502

KIA7812API, LINEAR-REGULATOR

1

J126781200040S

 IC503

HEAT SINK

1

2120000818040S

 IC503

KIA7912PI, LINEAR-REGULATOR

1

J126791200060S

TRANSISTORS

 Q201

KRC106S(NF) , NPN

1

J522010600210S

 Q202

KTC3875S, NPN

1

J522038750210S

 Q203L/R

KTC2875B(MB), NPN

2

J5222875B0010S

 Q204/Q205

KRA106S(PF), PNP

2

J520010600210S

 Q206

KRC106S(NF) , NPN

1

J522010600210S

 Q302L/R

KSA992F, PNP

2

J5000992F0050S

 Q303L/R

KSA992F, PNP

2

J5000992F0050S

 Q304L/R

KSC1845F, NPN

2

J5021845F0000S

 Q305L/R

KSC1845F, NPN

2

J5021845F0000S

 Q308L/R

KSC1845F, NPN

2

J5021845F0000S

 Q309L/R

KSA992F, PNP

2

J5000992F0050S

 Q310L/R

KSA992F, PNP

2

J5000992F0050S

 Q313/Q314

KRC106M, PNP

2

J6020106M0010S

 Q315

KRA106S(PF), PNP

1

J520010600210S

3/11Page

Summary of Contents for RX-772

Page 1: ...CEIVER SPECIFICATION TROUBLESHOOTING BLOCK DIAGRAM MECHANICAL PARTS LIST WIRING DIAGRAM EXPLODED VIEW LEVEL DIAGRAM ELECTRICAL PARTS LIST CIRCUIT DESCRIPTION SCHEMATIC DIAGRAMS TUNER ALIGNMENT CONTENT...

Page 2: ...INPUT FREQ REMARK UNIT NOMINAL L R LIMIT L R INPUT SENSITIVITY EXT 1kHz mV 200 30 200 50 1kHz 47k RDS MIC 1kHz mV K MIC 1kHz mV 3 0 5 3 1 CHANNEL BALANCE EXT 1kHz R O TO 40dB dB 0 5 2 RESIDUAL NOISE I...

Page 3: ...4ohms PHONO SECTION DESCRIPTION INPUT FREQ REMARK UNIT NOMINAL L R LIMIT L R INPUT SENSITIVITY PHONO 1kHz 150mVrms REC OUT mV 2 7 0 3 2 7 0 5 S N RATIO INPUT SHORT HF A FILTER RIAA DEVIATION VOL MIN 2...

Page 4: ...an kHz K AUTO Man kHz 2 USABLE SENSITIVITY TP 1 dB V 5 12 S N 30dB TP 2 dB V 5 12 TP 3 dB V 5 12 3 AUTO STOP LEVEL dB V 20 3 20 14 10 4 S N RATIO 1mV MONO dB 70 65 IHF A FILTER STEREO dB 65 60 5 TOTAL...

Page 5: ...65 TP 3 dBu m 55 65 3 S N RATIO 100dBu m 30 MOD 4 TOTAL HARMONIC DISTORTION 74dBu m 30 MOD 5 OVER LOAD DISTORTION 94dBu m 80 MOD 6 FREQUENCY RESPONSE at 6dB at 74dBu m 400Hz 7 SELECTIVITY 10kHz 9kHz...

Page 6: ......

Page 7: ......

Page 8: ......

Page 9: ...X1 VOL UP NC NC FLMD0 X2 SPK_B_RLY SPK_A_RLY CIRCUIT DESCRIPTION EVDD PROTECTION ST BY_RLY REGC VSS EVSS KEY1 TONE_DN NC FLT_CE RMC PLL_DA 24C08_SCLK SET_OPTION STEP_OPTION VOL_DN FLT_RESET TONE_UP N...

Page 10: ...2 Block Diagram...

Page 11: ...for TC9273 004 control data 32 P32 INTP3 P32 Port for flash upgrade 33 P31 INTP2 P31 Port for flash upgrade 34 P50 PLL_TUNED I Input for tuner TUNED condition L is active 35 P51 PLL_ST I Input for tun...

Page 12: ...evel Auto Stop Sens 3 Adjust Point F M A M 522 1620kHz 87 5 108 0MHz 98 1 98 1 60 75 AM 47 Load 1000 74 FM 47 Load 98 1 60 mV Non Adjust dBu 30 200 50 1 3 1 4 Above the receiving Frequency 12 0 5V 75...

Page 13: ...after Power On 1 Signal IN OUT check B Drive transistor out POWER TR Q306 L R Q307 L R C Protection circuit check 1 Output DC check Q512 2 COM I C protection terminal check u COM IC201 Pin No 1 3 Posi...

Page 14: ...FM Failure A FM MUTE adjustment inferior B PLL Line check 1 PLL control data check Data CE Clock IC201 Pin No 26 23 25 C TUNER B voltage inferior R205 D COM I C Resonator inferior I C No 201 1 COM I...

Page 15: ...0161000S G T K T BODY FRONT 1 3417210161100S K B BODY FRONT 1 3417210161200S K G 3 WINDOW DISPLAY 1 5077212263010S 4 KNOB VOLUME 2 5087211308000SZ 5 KNOB SELECT 1 5087211318000SZ G T K T KNOB SELECT 1...

Page 16: ...0S G 32 CABINET TOP 1 3000045406010S G K B T CABINET TOP 1 3000045406100S K G 33 CORD RCA 2 L063040750000S 34 BUSHING 8 2410040353010S G 35 CORD ASS Y 16A 250V 1 L068250160020S G CORD ASS Y 2 5A 250V...

Page 17: ......

Page 18: ...0 01 uF 50V K 1 D011103777160S G C253 ELECT GE 85C 47 uF 16V M 1 D040470083080S G C254 CERAMIC CHIP T C 270 pF 50V J 1 D010271167160S G C255 ELECT GE 85C 10 uF 50V M 1 D040100087070S G C256 CERAMIC C...

Page 19: ...087150S C519 ELECT GE 85C 100 uF 10V M 1 D040101082090S C520 C522 FILM POLYESTER 0 047 uF 100V J 3 D02047306C060S C523 CERAMIC CHIP HIK 0 01 uF 50V K 1 D011103777160S C524 ELECT GE 85C 2 2 uF 50V M 1...

Page 20: ...24 1SS133T SWITCHING 1 K000013300520S DZ106 MTZJ3 3B 0 5W ZENER 1 K06003R344520S DZ301 DZ302 MTZJ5 1B 0 5W ZENER 2 K06005R144520S DZ501 DZ502 MTZJ6 2B 0 5W ZENER 2 K06006R244520S DZ503 MTZJ12B 0 5W ZE...

Page 21: ...0001026M160S R222 CHIP THICK 220 kohm 1 16W J 1 C20002246M160S R223 CHIP THICK 10 kohm 1 16W J 1 C20001036M160S R224 CHIP THICK 100 ohm 1 16W J 1 C20001016M160S R225 CHIP THICK 47 kohm 1 16W J 1 C2000...

Page 22: ...TAL FILM 100PPM 220 ohm 1 4W J 2 C060022163050S R317L R METAL FILM 100PPM 2 2 ohm 1 4W J 2 C0602R2063050S R318L R METAL FILM 100PPM 100 ohm 1 4W J 2 C060010163050S R319L R METAL FILM 100PPM 2 2 ohm 1...

Page 23: ...CEMENT MPR 0 22 ohm 5W J 2 C144R22069350S R510 R512 CARBON FILM 27 kohm 1 5W J 3 C00002736P520S R513 CHIP THICK 1 kohm 1 16W J 1 C20001026M160S R514 CARBON FILM 10 kohm 1 5W J 1 C00001036P520S R515 C...

Page 24: ...7 L045084006040S J257 CN WIRE 1P 1 L045084006040S G J259 CN WIRE 1P 1 L045084006040S J260 J261 CHIP THICK 0 ohm 1 16W J 2 C20000006M160S J262 J263 CN WIRE 1P 2 L045084006040S G J264 J265 CN WIRE 1P 2...

Page 25: ...C BOARD OUTLET G ONLY CN505 CN WIRE 100MM 2P 1 L000101020010S G FUSE102 FUSE T3 15A 250V 1 N751223151110S G P103 P104 FUSE CLIP 2 G645000050010S G SOCKET AC OUTLET 1 G435040110000S G PCB1 1 ASSEMBLY P...

Page 26: ...2101121S Q402 Q403 KRA106S PF PNP 2 J520010600210S Q404 Q406 KRC106S NF NPN 3 J522010600210S Q407 KRA106S PF PNP 1 J520010600210S Q408 KRC106S NF NPN 1 J522010600210S Q409 KRA106S PF PNP 1 J5200106002...

Page 27: ...10101167160S C135L R FILM POLYESTER 0 15 uF 63V J 2 D020154078050S C136L R FILM POLYESTER 0 022 uF 100V J 2 D02022306C060S C138L R CERAMIC CHIP T C 220 pF 50V J 2 D010221167160S C139L R ELECT GE 85C 1...

Page 28: ...1 16W J 2 C20001046M160S R123L R CHIP THICK 100 ohm 1 16W J 2 C20001016M160S R124L R METAL FILM 100PPM 22 ohm 1W J 2 C060022065060S R125 R129 CHIP THICK 100 ohm 1 16W J 5 C20001016M160S R130 R131 META...

Page 29: ...P31 TxD VSS FLMD0 P32 RxD RESET VDD EXCLK...

Page 30: ......

Page 31: ......

Page 32: ......

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