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XR-3750
6-4. SCHEMATIC DIAGRAM MAIN Section (1/2) · See page 32 for Waveforms. · See page 31 for IC Block Diagrams.
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XR-3750
6-5. SCHEMATIC DIAGRAM MAIN Section (2/2) · See page 31 for IC Block Diagrams.
(Page 29)
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XR-3750
6-7.
SCHEMATIC DIAGRAM PANEL Section
(Page 26)
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· IC Block Diagrams MAIN Section IC301 CXA2509AQ-T4
LINEOUT2 TAPEIN2 PBOUT2 AUXIN2 PBEQ2 MSSW DIREF GND NC NC
IC351
GND 1
MM1322XFBE
· Waveform MAIN Section
8 OUT2
1 IC501 &¶ (X-IN)
30
29
28 27
26
25
24
23 22 21 24dB
IN2 2 VCC 3
120µ/70µ T2 + PBFB2 31 PBRIN2 32 PBREF2 33 PBFIN2 34 F2 TAPE EQ FWD/RVS VCT 35 PBGND 36 VCT + PBFIN1 37 PBREF1 38 PBRIN1 39 PBFB1 40 T1 120µ/70µ 1
PBEQ1
CONTROL CIRCUIT
7 VS
3.2 Vp-p
6 OUT1 5 GND
+ 20 MSMODE NR BIAS
IN1 4
X1 TAPE/AUX
MS MODE
19 DRSW 18 TAPESW 17 INSW 16 NC
222 ns
VCC LPF + F3 X1
MS ON/ 15 NC OFF DETECT 14 MSOUT
IC611
BA3918-V2
F1
13 DGND
12 MSTC + 24dB 6
MSLPF
REGULATOR
TAPEIN1 AUXIN1
LINEOUT1
PBOUT1
G2FB
NC
VCC
NC
IC331
LC75373ED
LTOUT LSIN LS1 LVRIN LCOM LSOUT LS2 LS3 LT1 LT2 LT3
1 NC
2 3 4 MODE2 MODE1 STB
5 VDD
6 AMP
7 VCC
8 ANT
9 COM
10 AM
11 FM
33
32
31 30
29
28 27 26
25 24
23
+
+ +
+ + +
22 LFIN 21 LFOUT
1 RVRIN
2 RCOM
3 4 RT1 RT2
5 RT3
6 7 8 RTOUT RSIN RS1
9 10 RS2 RS3
11 RSOUT
31
+
+
+
+
R1 R2 R3 R4 RSELO
40 41 42 43 44
+
+
VDD 39
+
LSELO L4 L3 L2 L1
34 35 36 37 38
+
+
20 LROUT
19 VREF DECODER LATCH SHIFT REGISTER CONTROL 18 17 16 15 CE DI CL VSS 14 RROUT
13 RFOUT 12 RFIN
32
GND
+
+
+
+
+
+ 2 3 4 5 7 8 9 10
+ +
11 G1FB
OVER VOLTAGE PROTECT
12