Pioneer VSX 108 Service Manual - Page 29

VSX-108 STK407-070 (MAIN PCB : IC204, IC205) • 2-Channel AF Power Amplifier IC • Block Diagram Ch. 1 OUT Pre. Ch. 1, 2 +Vcc +Vcc Ch. 2 OUT 69 3 7 TR1 C1 R1 D2 R3 TR6 C2 TR9 TR11 R8 Ch. 1 10 IN TR3 Ch. 1 NF 11 R4 TR4 R5 TR8 D3 C.C.C. BIAS 12 R6 TR5 D1 TR10 TR7 TR12 R9 R2 SUB GND 15 2 Ch. 1 -Vcc 8 Pre. -Vcc TR21 TR23 R18 R13 TR18 C4 D4 TR14 TR20 D5 R14 TR16 R15 TR13 C3 R11 TR15 14 Ch. 2 IN 13 Ch. 2 NF TR22 TR24 R19 TR19 R17 R16 TR17 R12 PT1 1 Ch. 2 -Vcc 45 00262419-010 (M62419FP) (MAIN PCB : IC203) • Digital Sound Controller with Tone Control IC • Block Diagram CLOCK VDD SELECT OUT2 VCL IN2 LOUD IN2 SELECT NF2 SELECT2 INA SELECT2 INB SELECT2 INC SELECT2 IND ATTF OUT2 ATTR OUT2 TONE IN2 TC2 A TC2 B TC2 C TONE OUT2 FADER IN2 REAR OUT2 FRONT OUT2 VREF 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 I/F 123 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 DATA GND SELECT OUT1 VOL IN1 LOUD IN1 SELECT NF1 SELECT1 INA SELECT1 INB SELECT1 INC SELECT1 IND ATTF OUT1 ATTR OUT1 TONE IN1 TC1 A TC1 B TC1 C TONE OUT1 FADER IN1 REAR OUT1 FRONT OUT1 VCC 29