background image

COMPONENT SIDE

FOIL SIDE

8

7

6

5

4

3

2

1

A

B

C

D

E

AVR-1803/883

31

DSP P.W.B. UNIT

w w w . x i a o y u 1 6 3 . c o m

Q Q 3 7 6 3 1 5 1 5 0

9

9

2

8

9

4

2

9

8

T E L

1 3 9 4 2 2 9 6 5 1 3

9

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

Q

TEL  13942296513  QQ  376315150  892498299 

TEL  13942296513  QQ  376315150  892498299 

http://www.xiaoyu163.com

http://www.xiaoyu163.com

Summary of Contents for AVR-883

Page 1: ...using in this service manual are slightly different from the actual set 16 11 YUSHIMA 3 CHOME BUNKYOU KU TOKYO 113 0034 JAPAN Telephone 03 3837 5321 www xiaoyu163 com QQ376315150 9 9 2 8 9 4 2 9 8 TE...

Page 2: ...um output 150 mV 7 V Distortion factor 0 03 1 kHz 3 V Video section Standard video jacks Input output level and impedance 1 Vp p 75 ohms Frequency response 5 Hz 10 MHz 1 3 dB S video jacks Input outpu...

Page 3: ...nada Models AC 230 V 50 Hz Europe U K Models AC 115 230 V 50 60 Hz Asia Model Power consumption 4 5 A U S A Canada Models 260 W Europe U K Asia Models 1 W Max Standby Maximum external dimensions 434 W...

Page 4: ...ns and detach the Front Panel to the arrow direction 1 2 Top Cover 3 4 Connector Connector Front Panel Rear Panel 6 6 5 3 Rear Panel 1 Take off the AC cord 5 2 Remove screws 6 44 pieces for U S A Cana...

Page 5: ...URROUND w w w x i a o y u 1 6 3 c o m Q Q 3 7 6 3 1 5 1 5 0 9 9 2 8 9 4 2 9 8 T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513...

Page 6: ...x i a o y u 1 6 3 c o m Q Q 3 7 6 3 1 5 1 5 0 9 9 2 8 9 4 2 9 8 T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150...

Page 7: ...w x i a o y u 1 6 3 c o m Q Q 3 7 6 3 1 5 1 5 0 9 9 2 8 9 4 2 9 8 T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 3763151...

Page 8: ...02 50mV 2 Distortion 98 1MHz 98 0MHz FM SSG 98 1MHz 60dB Mono 1kHz 100 Antenna Terminal Distortion Meter Output Terminal L T403 Minimum Distortion 3 Repeat Steps 1 and 2 4 Signal Level 98 1MHz 98 0MHz...

Page 9: ...SURROUND Rch TP102 SURROUND BACK ch CP106 3 Connect power cord to AC Line and turn power switch ON 4 Presetting MASTER VOLUME counterclockwise min MODE 6CH STEREO FUNCTION CD 5 Within 2 minutes after...

Page 10: ...6 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 TOP VIEW CXP740096 Terminal Function 1 9274 STB O TC9274 CONTROL 2 9274 73 9164 CLK O TC9274 TC9273 TC9164 CONTROL 3 9274 73 9164 DAT O TC9274 TC9273 TC9...

Page 11: ...ODER INPUT VOLUME 49 VOL UP I ENCODER INPUT VOLUME 50 SEL DOWN I ENCODER INPUT SELECT 51 SEL UP I ENCODER INPUT SELECT 52 AVSS 53 VREF 54 AVDD 55 NC 56 GND 57 STEP OPT I AREA SELECT 58 SET OPT I MODEL...

Page 12: ...I O DATA CIRCUIT I O0 I O7 Lower Byte I O8 I O15 Upper Byte UB LB CE OE WE LB UB PIN DESCRIPTION Pin Name Address inputs Symbol A0 A15 Data Inputs Outputs I O0 I O15 Chip Enable Input Output Enable I...

Page 13: ...67 DR1 68 RCLK1 69 RFS1 70 BMODE0 71 BMODE1 72 BYPASS 73 RESET 74 TDO 75 TDI 76 TMS 77 GND 78 TCK 79 TRST 80 GND 81 EMU 82 VDDINT 83 OPMODE 84 A0 85 A1 86 A2 87 A3 88 A4 89 A5 90 VDDEXT 91 A6 92 A7 93...

Page 14: ...put Driver Power Supply 49 ASDATA O ADC Serial Data Output 50 COUT O Output for Control Data 51 CCLK I Control Clock Input for Control Data 1 2 3 4 5 6 7 8 9 10 11 12 13 AGND AVDD OUTR2 NC OUTL2 NC OU...

Page 15: ...64fs 128fs 23 SLRCK O SLRCK clock output terminal fs 2 fs 2fs 24 SDIN I5 Serial audio data input terminal 25 DGND Digital GND 26 DVDD Digital power 27 XMCK O Osc amp output terminal I O 36 RERR 1 RXOU...

Page 16: ...minal 45 TBCK PIO1 I O 64fs bit clock input for modulation General I O in output terminal 46 TLRCK PIO2 I O fs clock input for modulation General I O in output terminal 47 TDATA PIO3 I O Serial audio...

Page 17: ...G11 TEST Symbol LC75721E Terminal Function Power terminal 5V Power terminal GND Power terminal FL drive Serial data transfer terminal External CR connecting terminal System reset terminal Anode outpu...

Page 18: ...IN4 CTL E IN3 CTL D IN1 CTL A V OUT1 Vcc IN2 CTL B V OUT2 CTL C 6dB 6dB LOGIC LOGIC Note 1 mark means that feasible for either H or L Note 2 Each input terminal is provided with sink chip clamp BA7625...

Page 19: ...ies DTC Series DTA114EK DTA114YK R1 10kohm R2 10kohm DTA144EK 47kohm 47kohm 10kohm 47kohm DTA114ES 10kohm 10kohm DTC114EK DTC114YK 10kohm 10kohm DTC144EK R1 R2 47kohm 47kohm 10kohm 47kohm DTC144ES 47k...

Page 20: ...S9 S10 S11 S12 S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12 S13 S14 S15 S16 S17 S18 S19 S20 S21 S22 S23 S24 S13 S14 S15 S25 S26 S27 S28 S29 S30 S31 S32 S33 S34 S35 S25 S26 S27 S28 S29 S30 S31 S32 S33 S34 S3...

Page 21: ...nada Europe U K Australia China Korea models w w w x i a o y u 1 6 3 c o m Q Q 3 7 6 3 1 5 1 5 0 9 9 2 8 9 4 2 9 8 T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 Q...

Page 22: ...x i a o y u 1 6 3 c o m Q Q 3 7 6 3 1 5 1 5 0 9 9 2 8 9 4 2 9 8 T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150...

Page 23: ...Kong Taiwan R O C models w w w x i a o y u 1 6 3 c o m Q Q 3 7 6 3 1 5 1 5 0 9 9 2 8 9 4 2 9 8 T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 89249829...

Page 24: ...x i a o y u 1 6 3 c o m Q Q 3 7 6 3 1 5 1 5 0 9 9 2 8 9 4 2 9 8 T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150...

Page 25: ...UNIT w w w x i a o y u 1 6 3 c o m Q Q 3 7 6 3 1 5 1 5 0 9 9 2 8 9 4 2 9 8 T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ...

Page 26: ...x i a o y u 1 6 3 c o m Q Q 3 7 6 3 1 5 1 5 0 9 9 2 8 9 4 2 9 8 T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150...

Page 27: ...UNIT w w w x i a o y u 1 6 3 c o m Q Q 3 7 6 3 1 5 1 5 0 9 9 2 8 9 4 2 9 8 T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ...

Page 28: ...x i a o y u 1 6 3 c o m Q Q 3 7 6 3 1 5 1 5 0 9 9 2 8 9 4 2 9 8 T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150...

Page 29: ...W B UNIT w w w x i a o y u 1 6 3 c o m Q Q 3 7 6 3 1 5 1 5 0 9 9 2 8 9 4 2 9 8 T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 139422965...

Page 30: ...x i a o y u 1 6 3 c o m Q Q 3 7 6 3 1 5 1 5 0 9 9 2 8 9 4 2 9 8 T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150...

Page 31: ...W B UNIT w w w x i a o y u 1 6 3 c o m Q Q 3 7 6 3 1 5 1 5 0 9 9 2 8 9 4 2 9 8 T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 139422965...

Page 32: ...T 32 COMPONENT SIDE www xiaoyu163 com QQ376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 89249829...

Page 33: ...be refused l When ordering of part clearly indicate 1 and I i to avoid mis supplying l Ordering part without stating its part number can not be supplied l Part indicated with the mark is not illustra...

Page 34: ...hina model E2 Europe model E1H Hong Kong model EK U K model E1T Taiwan R O C model E1K Korea model D136 963 0058 504 Zener diode MTZJ11B D137 963 0096 508 Diode 1N4148 D138 963 0058 407 Diode IN4007 D...

Page 35: ...0V C171B 963 9004 559 Ceramic 0 1uF 50V R109FR 963 9005 477 Metal oxide 0 22 ohm 1W R109SL 963 9005 477 Metal oxide 0 22 ohm 1W R109SR 963 9005 477 Metal oxide 0 22 ohm 1W R110C 963 9005 477 Metal oxi...

Page 36: ...8 908 AC cord connector base 1 CP102 960 0123 304 2P connector base 1 CP103 960 0128 901 3P connector base 1 CP104 960 0128 804 6P connector base 1 CP106 960 0123 207 3P connector base 1 CP501 963 008...

Page 37: ...IC301 960 0180 004 IC LC75721E IC302 963 0074 504 IC BU2090F IC603 960 0174 502 IC NJM2068DD IC803 269 0186 002 IC GP1FA502RZ RMC301 960 0181 100 IC NJL64H380A Q201 269 0054 901 Transistor DTC144EK Q...

Page 38: ...4 083 Carbon chip 100 kohm 1 16W R246C 963 9004 083 Carbon chip 100 kohm 1 16W R246SL 963 9004 083 Carbon chip 100 kohm 1 16W R246SR 963 9004 083 Carbon chip 100 kohm 1 16W R246SW 963 9004 083 Carbon...

Page 39: ...chip 56 kohm 1 16W R356 963 9003 398 Carbon chip 1 kohm 1 16W R356FL 963 9004 397 Carbon chip 56 kohm 1 16W R357FL 963 9004 397 Carbon chip 56 kohm 1 16W R358FL 963 9004 397 Carbon chip 56 kohm 1 16W...

Page 40: ...ame Remarks R407 963 9004 342 Carbon chip 4 7 kohm 1 16W R601BL 963 9003 385 Carbon chip 100 ohm 1 16W R601BR 963 9003 385 Carbon chip 100 ohm 1 16W R602BL 963 9006 065 Carbon chip 200 kohm 1 16W R602...

Page 41: ...47uF 100V C322 963 9005 309 Electrolytic 47uF 10V C323 963 9004 766 Mylar film 0 1uF 100V C324 963 9005 914 Electrolytic 4 7uF 50V C325 963 9004 575 Ceramic chip 100pF 50V C326 963 9005 914 Electrolyt...

Page 42: ...nsistor DTC114TK Q611 963 0102 900 Transistor DTC114TK Q612 963 0102 900 Transistor DTC114TK Q651 960 0005 105 Transistor KTA1266Y Q652 960 0005 105 Transistor KTA1266Y Q653 960 0005 105 Transistor KT...

Page 43: ...hip 1 kohm 1 16W R202RM 963 9004 300 Carbon chip 39 kohm 1 16W R203RM 963 9003 398 Carbon chip 1 kohm 1 16W R204RM 963 9004 339 Carbon chip 470 ohm 1 16W R205RM 963 9006 065 Carbon chip 200 kohm 1 16W...

Page 44: ...004 931 Ceramic 180pF 50V for ASIA R652T 244 2043 982 Metal oxide 0 22 ohm 1W R653 963 9004 465 Carbon chip 75 ohm 1 16W R654 963 9004 465 Carbon chip 75 ohm 1 16W R655 963 9004 465 Carbon chip 75 ohm...

Page 45: ...60 9008 611 Mylar film 0 0033uF 100V C560FR 960 9008 611 Mylar film 0 0033uF 100V C561FL 960 9008 695 Mylar film 0 0068uF 100V C561FR 960 9008 695 Mylar film 0 0068uF 100V C601D 963 9005 312 Electroly...

Page 46: ...pF 50V C906 963 9004 575 Ceramic chip 100pF 50V C910 963 9004 575 Ceramic chip 100pF 50V C911 963 9004 698 Ceramic chip 0 01uF 50V C918 963 9004 698 Ceramic chip 0 01uF 50V C921 963 9004 575 Ceramic c...

Page 47: ...for E3 EU R207ML 963 9004 083 Carbon chip 100 kohm 1 16W for E3 EU R207MR 963 9004 083 Carbon chip 100 kohm 1 16W for E3 EU SEMICONDUCTORS GROUP IC601 963 0083 304 IC BA7626 IC602 963 0074 504 IC BU2...

Page 48: ...9 Carbon chip 470 ohm 1 16W R704R 963 9004 339 Carbon chip 470 ohm 1 16W R705L 963 9004 339 Carbon chip 470 ohm 1 16W R705R 963 9004 339 Carbon chip 470 ohm 1 16W R706L 963 9004 339 Carbon chip 470 oh...

Page 49: ...9004 520 Ceramic 100pF 50V Ref No Part No Part Name Remarks Ref No Part No Part Name Remarks R737L 963 9004 193 Carbon chip 22 ohm 1 16W R737R 963 9004 193 Carbon chip 22 ohm 1 16W R751L 963 9006 065...

Page 50: ...trolytic 4 7uF 50V C714R 960 9010 010 Electrolytic 4 7uF 50V C715L 963 9004 737 Ceramic chip 0 022uF 25V C715R 963 9004 737 Ceramic chip 0 022uF 25V C716L 963 9005 765 Electrolytic 10uF 35V C716R 963...

Page 51: ...rbon chip 1 kohm 1 16W R870SB 963 9003 398 Carbon chip 1 kohm 1 16W R870SL 963 9003 398 Carbon chip 1 kohm 1 16W R870SR 963 9003 398 Carbon chip 1 kohm 1 16W R870SW 963 9003 398 Carbon chip 1 kohm 1 1...

Page 52: ...16W R982 963 9004 326 Carbon chip 47 ohm 1 16W R983 963 9004 326 Carbon chip 47 ohm 1 16W R984 963 9004 326 Carbon chip 47 ohm 1 16W R985 963 9004 326 Carbon chip 47 ohm 1 16W R986 963 9004 326 Carbo...

Page 53: ...1uF 50V C868 963 9005 998 Ceramic chip 24pF 50V C869 963 9005 998 Ceramic chip 24pF 50V C869L 963 9004 575 Ceramic chip 100pF 50V C869R 963 9004 575 Ceramic chip 100pF 50V C870 963 9004 698 Ceramic c...

Page 54: ...UP CB803 963 0050 502 Chip emifil 1 CB805 963 0050 502 Chip emifil 1 CB806 963 0050 502 Chip emifil 1 CB807 963 0050 502 Chip emifil 1 CB808 963 0050 502 Chip emifil 1 CB809 963 0050 502 Chip emifil 1...

Page 55: ...04 801 Fuse 3 15A for E1 E1H E1T 1 F102A 960 0005 804 Fuse clip for E1 E1H E1T 1 F102B 960 0005 804 Fuse clip for E1 E1H E1T 1 F901 963 0104 908 Fuse 6 3A for E1 E1H E1T 1 F901A 960 0005 804 Fuse clip...

Page 56: ...A 22 21 19 3 F A 2 61 Note The symbols indicate the following destinations E3 U S A model Canada model EU U S A model AVR 883 E2 Europe model EK U K model E1 Asia model E1H Hong Kong model E1T Taiwan...

Page 57: ...3 129 Window for E2 EK 1 4 112 0839 008 Volume knob for Black model 1 112 0839 011 Volume knob for Gold model 1 5 963 0084 811 Select knob for Black model 1 963 0084 808 Select knob for Gold model 1 6...

Page 58: ...r E1T 1 963 0025 809 Preset label for E1 E1H E1T 1 963 0104 403 Rating label T for E1T 1 963 0104 500 License label for E1 E1H E1T 1 513 2481 000 Serial No sheet T for E1T 1 Serial label for E1K 1 SCR...

Page 59: ...209 FM antenna 1 209 963 0103 006 Remocon RC 916 for E3 EU 1 963 0100 203 Remocon RC 917 for E2 EK ASIA 1 210 Battery R6P AA 2 211 963 0061 300 AC plug adapter for E1T 1 212 963 0052 704 FM antenna ad...

Page 60: ...w w x i a o y u 1 6 3 c o m Q Q 3 7 6 3 1 5 1 5 0 9 9 2 8 9 4 2 9 8 T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315...

Page 61: ...1 10 1 2 3 4 5 6 7 8 9 10 11 A B C D E F G H SIGNAL LINE AVR 1803 883 B LINE w w w x i a o y u 1 6 3 c o m Q Q 3 7 6 3 1 5 1 5 0 9 9 2 8 9 4 2 9 8 T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1...

Page 62: ...B C D E F G H SIGNAL LINE AVR 1803 883 B LINE w w w x i a o y u 1 6 3 c o m Q Q 3 7 6 3 1 5 1 5 0 9 9 2 8 9 4 2 9 8 T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513...

Page 63: ...0 11 A B C D E F G H SIGNAL LINE AVR 1803 883 B LINE w w w x i a o y u 1 6 3 c o m Q Q 3 7 6 3 1 5 1 5 0 9 9 2 8 9 4 2 9 8 T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942...

Page 64: ...2 3 4 5 6 7 8 9 10 11 A B C D E F G H SIGNAL LINE AVR 1803 883 B LINE w w w x i a o y u 1 6 3 c o m Q Q 3 7 6 3 1 5 1 5 0 9 9 2 8 9 4 2 9 8 T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6...

Page 65: ...B C D E F G H SIGNAL LINE AVR 1803 883 B LINE w w w x i a o y u 1 6 3 c o m Q Q 3 7 6 3 1 5 1 5 0 9 9 2 8 9 4 2 9 8 T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513...

Page 66: ...7 8 9 10 11 A B C D E F G H AVR 1803 883 B LINE w w w x i a o y u 1 6 3 c o m Q Q 3 7 6 3 1 5 1 5 0 9 9 2 8 9 4 2 9 8 T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 139422965...

Page 67: ...8 9 10 11 A B C D E F G H AVR 1803 883 B LINE w w w x i a o y u 1 6 3 c o m Q Q 3 7 6 3 1 5 1 5 0 9 9 2 8 9 4 2 9 8 T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513...

Page 68: ...6 7 8 9 10 11 A B C D E F G H AVR 1803 883 B LINE w w w x i a o y u 1 6 3 c o m Q Q 3 7 6 3 1 5 1 5 0 9 9 2 8 9 4 2 9 8 T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296...

Page 69: ...9 10 1 2 3 4 5 6 7 8 9 10 11 A B C D E F G H AVR 1803 883 B LINE w w w x i a o y u 1 6 3 c o m Q Q 3 7 6 3 1 5 1 5 0 9 9 2 8 9 4 2 9 8 T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q...

Page 70: ...A B C D E F G H AVR 1803 883 SIGNAL LINE B LINE w w w x i a o y u 1 6 3 c o m Q Q 3 7 6 3 1 5 1 5 0 9 9 2 8 9 4 2 9 8 T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 139422965...

Reviews: