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Sony STR-K7100 Service Manual - Page 13

Str-k7100, Fm Tuner Check - receiver

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1. DCAC DSP Data Line Checking After press the [TUNING MODE], DCAC Factory test mode will start, below display will show: "DCAC[][][]x" x=1, 2, 3 If there is error happen, below display will show: "ERR[]SD0x" x=1 t D1501 or R1530 problem x=2 t D1502 problem x=3 t D1503 problem 2. DCAC board Checking Connect front left speaker of the receiver and AUTO CAL microphone. Turn [MASTER VOLUME] jog, there will be test tone sound output from front left speaker, and the display will change accordingly. "AD[]-[]xxx" xxx=0 to 255 (depends on loudness of test tone) STR-K7100 SECTION 4 FM TUNER CHECK FM AUTO STOP CHECK (1) Turn on the set. (2) Input the following signal from Signal Generator to FM antenna input directly. * Carrier Frequency: A=87.5 MHz, B=98 MHz, C=108 MHz Deviation : 75 kHz Modulation : 1 kHz ANT input : 35 dBu (EMF) (Note) Please use 75 ohm "coaxial cable" to connect SG and the set. You cannot use video cable for checking. Please use SG whose output impedance is 75 ohm. (3) Set to FM tuner function and scan the input FM signal with automatic scanning. (4) Confirm that input Frequency of A, B and C are detected and automatic scanning stops. The stop of automatic scanning means "The station signal is received in good condition." 13

Section	Page
COVER	1
TABLE OF CONTENTS	4
1. GENERAL	5
Description and location of parts	5
2. DISASSEMBLY	8
2-1. CASE	8
2-2. BACK PANEL SECTION	9
2-3. FRONT PANEL SECTION	9
2-4. DIGITAL BOARD	10
2-5. MAIN BOARD SECTION	10
2-6. STANDBY BOARD	11
3. TEST MODE	12
4. FM TUNER CHECK	13
5. DIAGRAMS	14
5-1. CIRCUIT BOARDS LOCATION	14
5-2. BLOCK DIAGRAM — TUNER/AUDIO SECTION —	15
5-3. BLOCK DIAGRAM — DIGITAL SECTION —	16
5-4. BLOCK DIAGRAM — VIDEO SECTION —	17
5-5. BLOCK DIAGRAM — HDMI SW SECTION —	18
5-6. BLOCK DIAGRAM — XM SECTION —	19
5-7. BLOCK DIAGRAM — KEY/DISPLAY SECTION —	20
5-8. BLOCK DIAGRAM — OUTPUT/POWER SECTION —	21
Waveforms	22
5-9. PRINTED WIRING BOARDS — MAIN SECTION —	23
5-10. SCHEMATIC DIAGRAM — MAIN SECTION (1/2) —	24
5-11. SCHEMATIC DIAGRAM — MAIN SECTION (2/2) —	25
5-12. PRINTED WIRING BOARD — DIGITAL SECTION (1/2) —	26
5-13. PRINTED WIRING BOARD — DIGITAL SECTION (2/2) —	27
5-14. SCHEMATIC DIAGRAM — DIGITAL SECTION (1/3) —	28
5-15. SCHEMATIC DIAGRAM — DIGITAL SECTION (2/3) —	29
5-16. SCHEMATIC DIAGRAM — DIGITAL SECTION (3/3) —	30
5-17. PRINTED WIRING BOARDS — VIDEO SECTION —	31
5-18. SCHEMATIC DIAGRAM — VIDEO SECTION —	32
5-19. PRINTED WIRING BOARD — HDMI SW SECTION —	33
5-20. SCHEMATIC DIAGRAM — HDMI SW SECTION —	34
5-21. PRINTED WIRING BOARD — XM SECTION —	35
5-22. SCHEMATIC DIAGRAM — XM SECTION —	36
5-23. PRINTED WIRING BOARDS — DCAC, POWER KEY SECTION —	37
5-24. SCHEMATIC DIAGRAM — DCAC, POWER KEY SECTION —	37
5-25. PRINTED WIRING BOARD — DISPLAY SECTION —	38
5-26. SCHEMATIC DIAGRAM — DISPLAY SECTION —	39
5-27. PRINTED WIRING BOARD — POWER SECTION —	40
5-28. SCHEMATIC DIAGRAM — POWER SECTION —	40
5-29. PRINTED WIRING BOARD — DCDC SECTION —	41
5-30. SCHEMATIC DIAGRAM — DCDC SECTION —	41
IC Block Diagrams	42
IC Pin Descriptions	48
6. EXPLODED VIEWS	55
6-1. CASE SECTION	55
6-2. FRONT PANEL SECTION	56
6-3. BACK PANEL SECTION	57
6-4. CHASSIS SECTION	58
7. ELECTRICAL PARTS LIST	59
DCAC	59
DCDC	59
DIGITAL	59
DISPLAY	63
HDMI SW	64
HEADPHONE	65
MAIN	65
POWER KEY	69
STANDBY	69
VIDEO	70
VIDEO 3	70
XM	71