Text preview for : STR-DB925.pdf part of SONY STR-DB925 Service Manual. Very simillar to STR-DE915 (US version). FM Stereo Receiver/Amplituner with DD decoder. 5 x 100 W
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STR-DB925
SERVICE MANUAL
AEP Model UK Model Australian Model
Photo: BLACK
SPECIFICATIONS
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FM STEREO/FM-AM RECEIVER
MICROFILM
1
WAVEFORMS DISPLAY SECTION 1
3.2Vp-p
DIGITAL SECTION 1
4Vp-p
4MHz
4MHz
IC1201 (TM XO
IC102 *TM XO
2
3.6Vp-p
2
4Vp-p
24.576MHz
7.28MHz
IC1101 @¶ X OUT
IC103 !¡ X2
3
4.8Vp-p
TUNER SECTION
12.28Vp-p
1 4
3.2Vp-p
IC1101 @ª CLK OUT
4.8Vp-p
4.33MHz
IC1 !£
3MHz
IC1101 #¢ BCK
5
4.8Vp-p
48MHz
IC1101 #§ LRCK
6
3Vp-p
12.27Vp-p
IC1403 0 2QB
7
0.56Vp-p
49.152MHz
IC1305 !¡, !TM
8
3Vp-p
12.28MHz
IC1305 6
16
STR-DB925
3-3. SCHEMATIC DIAGRAM INPUT SECTION · See page 58 for IC Block Diagrams.
(Page 38)
(Page 38)
(Page 41)
(Page 53)
(Page 45)
(Page 45)
(Page 45)
(Page 21)
(Page 29)
(Page 30)
(Page 22)
(Page 42)
(Page 46)
17
18
STR-DB925
3-5. SCHEMATIC DIAGRAM POWER AMP SECTION
(Page 29)
(Page 18)
(Page 26)
(Page 26)
(Page 29)
(Page 18)
(Page 29)
(Page 30)
(Page 53)
21
22
STR-DB925
3-7. SCHEMATIC DIAGRAM TRANS SECTION · See page 58 for IC Block Diagrams.
(Page 22) (Page 22)
(Page 53)
25
26
STR-DB925
3-9. SCHEMATIC DIAGRAM REAR AMP SECTION
(Page 18)
(Page 21) (Page 18) (Page 21) (Page 51) (Page 22) (Page 22)
29
30
STR-DB925
3-11. SCHEMATIC DIAGRAM DISPLAY SECTION · See page 16 for Waveforms. · See page 57 for IC Block Diagrams. · See page 60 for IC Pin Functions.
(Page 45) (Page 37) (Page 37)
(Page 38)
(Page 38)
(Page 51) (Page 42) (Page 51)
33
34
STR-DB925
3-13. SCHEMATIC DIAGRAM PANEL SECTION
(Page 34)
(Page 33)
(Page 34)
(Page 17)
(Page 34) (Page 17)
37
38
STR-DB925
3-15. SCHEMATIC DIAGRAM BACK PANEL SECTION · See page 16 for Waveforms. · See page 58 for IC Block Diagrams.
(Page 42)
(Page 33)
(Page 46)
(Page 41)
(Page 17)
(Page 17) (Page 51)
41
42
STR-DB925
3-17. SCHEMATIC DIAGRAM VOLUME SECTION
(Page 41)
(Page 18)
(Page 18)
(Page 18)
(Page 18) (Page 34)
45
46
STR-DB925
3-19. SCHEMATIC DIAGRAM D IN/OUT SECTION · See page 58 for IC Block Diagrams.
(Page 54)
49
STR-DB925
3-21. SCHEMATIC DIAGRAM DIGITAL (1/2) SECTION · See page 16 for Waveforms. · See page 64, 67 for IC Pin Functions. · See page 55 for Printed Wiring Board.
(Page 42)
(Page 30)
(Page 34)
(Page 34)
51
52
STR-DB925
3-22. SCHEMATIC DIAGRAM DIGITAL (2/2) SECTION · See page 16 for Waveforms. · See page 59 for IC Block Diagrams
(Page 22)
(Page 25)
(Page 17)
(Page 49)
53
54
STR-DB925
3-24. IC BLOCK DIAGRAMS
IC103 BA6208
MOTOR DRIVE
IC303 LC7823 IC105 MSC1164GS-KR1
NC 1 NC 2 20 BIT SHIFT REGISTER Q 32 NC 31 CHG 30 DIN L1 1 30 R1 29 R2 28 R COM1 27 R3 26 R4 25 R COM2 24 R5 23 R6
IC901 NJM2103D
L2 2 L COM1 3 L3 4
SWITCH
D
CR
1
8
RESET
DOUT 3
SWITCH MOTOR DRIVE REG 1 NC 2 INPUT 1 3 INPUT 2 4 NC 5 GND 6 Vcc 7 OUTPUT 2 8 OUTPUT1 9 NC
CK
29 CLK
L4 L COM2 L5
5 6 7
VSC 2 + VREF
+ 7 VSA
LS 4
CK
20 BIT LATCH
L6 8 L COM3 9
OUTC 22 R COM3 21 R7 LEVEL SHIFT 20 R COM4 19 VDD GND
3
6
VSB/SESIN
L7 10 GATE CIRCUIT CL 5 28 GND L COM4 11 VEE 12
4 Q R S + +
5
V+
IC104 MSC1162AGS-BK
HVO1 HVO2 HVO3 HVO4 HVO5 HVO6 HVO7 HVO8 HVO9 HVO10 HVO11 HVO12 HVO13 HVO14 HVO15 HVO16 HVO17 HVO18 HVO19 HVO20 VHV GND1 GND2 CL NC LS NC R/L DIN VCC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 HVO40 HVO39 HVO38 HVO37 HVO36 HVO35 HVO34 HVO33 HVO32 HVO31 HVO30 HVO29 HVO28 HVO27 HVO26 HVO25 HVO24 HVO23 HVO22 HVO21 VHV GND1 GND2 NC CHG NC CLK NC DOUT VCC
VCC 6 HVO20 HVO19 HVO18 HVO17 HVO16 HVO15 HVO14 HVO13 HVO12 HVO11 7 8 9 10 11 12 13 14 15 16
CONTROL
CE 13 OUTPUT CIRCUIT D1 14 27 Vhv CL 15 26 25 24 23 22 21 20 19 18 17 HVO1 HVO2 HVO3 HVO4 HVO5 HVO6 HVO7 HVO8 HVO9 HVO10
LATCH
18 RES 17 S
SHIFT RESISTOR
16 VSS
OUTPUT CIRCUIT
GATE CIRCUIT
IC414 TC9299P
VSS OUT IN NC A-GND 1 2 3 4 5 16 VDD 15 14 13 12 OUT IN NC A-GND
IC1005 TC74HC151AF (EL)
D3 1 D2 2
R-ch
16 VCC D2 D3 D4 D1 D0 Y W S C D5 D6 D7 A B 15 D4 14 D5 13 D6 12 D7 11 A 10 B 9 C
L-ch
40 BIT LATCH
CK
L-CH DATA LATCH CIRCUIT
R-CH DATA LATCH CIRCUIT
D1 3 D0 4 Y 5
IC301 LC7822
1 IN 2 3 OUT 4 5 IN 6 7 OUT 8 9 30 29 IN 28 27 OUT 26 25 IN 24 23 OUT 22 IN 10 21 LEVEL SHIFT 20 OUT 19 VDD REG DRIVE 1 MUTE 2 3 4 PRE DRIVE 5 NF1 6 IN1 7 GND PRE DRIVE DRIVE PROTECTOR BIAS CIRCUIT CS1 GND CK 6 7 8 LEVEL SHIFT CIRCUIT SHIFT REGISTER (13bit) STROBE GENERATOR CIRCUIT LEVEL SHIFT CIRCUIT 11 CS2 10 STB 9 DATA
XY 6 OE 7 GND 8
40 BIT SHIFT REGISTER DOUT DIN
CK
IC1006 TC74HC08AF (EL) IC501 uPC2581V
1A 1 1B 2 1Y 3 2A 4 2B 5 2Y 6 GND 7 14 VCC 13 4B 12 4A 11 4Y 10 3B 9 3A 8 3Y
IC201 NJM2296D
V+ 16 Vout2 SW1 15 14 Vin1 13 GND 12 Vout3 11 SW2 10 Vin2 9
IN
OUT VEE
11 12
CONTROL
CE 13 S6 S1 S4 S5 S7 S2 DI 14
LATCH
18 RESET 17 S
8 9 10 11 12 13 14 15 IN2 NF2 COMP2 VOUT2 +VOUT2 VCC1 VCC2 VEE
CL 15
SHIFT RESISTOR
16 VSS
S3
1 2 Vout1 SW5
3 Vin5
4 SW3
5 Vin4
6 SW4
7 Vin3
8 V-
+VOUT1 VOUT1 COMP1
57
58
IC1103 AK4526
MCKO ICKS1 DEM0 DVDD ICKS0 DEM1 DVSS CAD1 CAD0 PD XTS
IC1108 MC74HC00AF
VCC 14 13 12 11 10 9 8
44
43
42
41
40
39
38
37
36
35
34
SDOS 1 OCKS 2
XTO XTI Clock Gen MCLK HPF ADC
33 VREFL 32 RIN+
M/S 3 BICK 4 LRCK 5 SDTI1 6 SDTI2 7 SDTI3 8 SDTO 9 DAUX 10 DFS 11 DEM OCKS 1/2
MCLK BICK HPF LRCK SDTI1 SDTI2 SDTI3 DAC DAC DAC DAC SDOUT Audio I/F 16 DVSS 17 PD 18 XTS DAC DAC LPF LPF LPF LPF LPF LPF VR VR VR VR VR VR ADC
31 RIN30 LIN+ 29 LIN28 ROUT1 27 LOUT1 26 ROUT2 25 LOUT2 24 ROUT3 23 LOUT3 1 2 3 4 5 6 7 GND
12 DEM1
13 DEM0
14 MCKO
15 DVDD
19 ICKS1
20 ICKS0
21 CAD1
22 CAD0
EXTMEM, GPIO8
CMPCLK, SCLKN2 CMPDAT, RCV958, SDATAN2
SDATAN1
LRCKN1 SCLKN1, STCCLK2 VSS3 VDD3
SCDIO, SCDOUT, PSEL, GPIO9 19
ABOOT, INTREQ
IC1301 CS4926
28 CMPREQ,LRCKN2 CLK IN CLKSEL FILTD FILTS VDDA VSSA 29 30 31 32 33 34 35
27
26 25 24 23 22
21
20
18
PLL CLOCK MANAGER
COMPRESSED DATA INPUT INTERFACE SP DIF RECEIVER
DIGITAL AUDIO INPUT INTERFACE
CS 17 16 15 14 13 12 11 10 9 8 7 DATA0,EMAD0,GPIO0 DATA1,EMAD1,GPIO1 DATA2,EMAD2,GPIO2 DATA3,EMAD3,GPIO3 VSS2 VDD2 DATA4,EMAD4,GPIO4 DATA5,EMAD5,GPIO5 DATA6,EMAD6,GPIO6 DATA7,EMAD7,GPIO7 A0,SCCLK 6
RESET DD DC
36 37 38
RAM INPUT BUFFER
FRAMER SHIFTER INPUT BUFFER CONTROLLER PARALLEL or SERIAL HOST INTERFACE 24-Bit DSP PROCESSING
STC
ROM PROGRAM MEMORY ROM DATA MEMORY
RAM PROGRAM MEMORY RAM DATA MEMORY RAM OUTPUT BUFFER OUTPUT FORMATTER
39 40 41 AUDATA2 AUDATA1 AUDATA0
42 43 44 LRCLK SCLK MCLK
1 2 VDD1 VSS1
3 XMT958
4 WR, DS, EMWR, GPIO10
5 RD, R/W, EMOE, GPIO11
IC1403 TC74VHC393FT (EL)
14 VCC QA CLEAR QB A QC QD 13 12 11 10 9 8
CLEAR QA 1 2 3
A QB 4 QC 5 QD GND 6 7
59
A1, SCDIN