Sony STR-DB925 User manual

– 1 –
MICROFILM
AEP Model
UK Model
Australian Model
SPECIFICATIONS
SERVICE MANUAL
FM STEREO/FM-AM RECEIVER
STR-DB925
— Continued on next page —
Photo:BLACK

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1
2
IC103 !¡ X2
IC102 *™ XO
WAVEFORMS
– DISPLAY SECTION –
1
IC1 !£
– TUNER SECTION –
1
2
IC1101 @¶ X OUT
IC1201 (™ XO
– DIGITAL SECTION –
3
4
IC1101 #¢ BCK
IC1101 @ª CLK OUT
5
6
IC1403 02QB
IC1101 #§ LRCK
7
8
IC1305 6
IC1305 !¡, !™
3.2Vp-p
4MHz
4Vp-p
7.28MHz
3.2Vp-p
4.33MHz
4Vp-p
4MHz
3.6Vp-p
24.576MHz
4.8Vp-p
12.28Vp-p
4.8Vp-p
3MHz
4.8Vp-p
48MHz
3Vp-p
12.27Vp-p
0.56Vp-p
49.152MHz
3Vp-p
12.28MHz

– 17 – – 18 –
STR-DB925
3-3. SCHEMATIC DIAGRAM – INPUT SECTION –
• See page 58 for IC Block Diagrams.
(Page 38) (Page 38)
(Page 53)
(Page 41) (Page 45) (Page 45) (Page 45)
(Page 21)
(Page 29)
(Page 30)
(Page 22)
(Page 42) (Page 46)

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STR-DB925
3-5. SCHEMATIC DIAGRAM – POWER AMP SECTION –
(Page 18)
(Page 29)
(Page 29)
(Page 29)
(Page 26)
(Page 26)
(Page 53)
(Page 18)
(Page 30)

– 25 – – 26 –
3-7. SCHEMATIC DIAGRAM – TRANS SECTION –
• See page 58 for IC Block Diagrams.
STR-DB925
(Page 53)
(Page 22)
(Page 22)

– 29 – – 30 –
3-9. SCHEMATIC DIAGRAM – REAR AMP SECTION –
STR-DB925
(Page 18)
(Page 21)
(Page 21)
(Page 22)
(Page 18)
(Page 51)
(Page 22)

– 33 – – 34 –
STR-DB925
3-11. SCHEMATIC DIAGRAM – DISPLAY SECTION –
• See page 16 forWaveforms.
• See page 57 for IC Block Diagrams.
• See page 60 for IC Pin Functions.
(Page 38)
(Page 38)
(Page 37)
(Page 45)
(Page 51)
(Page 51)(Page 42)
(Page 37)

– 37 – – 38 –
3-13. SCHEMATIC DIAGRAM – PANEL SECTION –
STR-DB925
(Page 34)
(Page 33)
(Page 34)
(Page 34)
(Page 17)
(Page 17)

– 41 – – 42 –
STR-DB925
3-15. SCHEMATIC DIAGRAM – BACK PANEL SECTION –
• See page 16 forWaveforms.
• See page 58 for IC Block Diagrams.
(Page 42)
(Page 33)
(Page 46)
(Page 17)
(Page 41)
(Page 51)
(Page 17)

– 45 – – 46 –
STR-DB925
3-17. SCHEMATIC DIAGRAM –VOLUME SECTION –
(Page 18)
(Page 18)
(Page 18)
(Page 34)
(Page 41)
(Page 18)