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STR-DB925 SERVICE MANUAL AEP Model UK Model Australian Model Photo: BLACK SPECIFICATIONS -- Continued on next page -- 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 !Ў X2 3 4.8Vp-p ­ TUNER SECTION ­ 12.28Vp-p 1 4 3.2Vp-p IC1101 @Є CLK OUT 4.8Vp-p 4.33MHz IC1 !Ј 3MHz IC1101 #ў BCK 5 4.8Vp-p 48MHz IC1101 #§ LRCK 6 3Vp-p 12.27Vp-p IC1403 0 2QB 7 0.56Vp-p 49.152MHz IC1305 !Ў, !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