Sony BKM-48X Installation And Maintenance Manual page 48

BHA Board Waveforms
1 2 3
1.6Vp-p (H) 0.8Vp-p (H) 0.8Vp-p (H)
4 5 6
2Vp-p (H) 1Vp-p (H) 1Vp-p (H)
BHA
BHA Board IC Block Diagrams
CXA1521M (IC170, 270, 370, 700)
IN 1 REGULATOR 8 Vcc
GND 2 7 DC CONT
GCA
GAIN
GND
3 6
CONT
GAIN-CONT
V EE 4 5 OUT
DC-CONT
EL4451CS (IC451, 551, 651)
NC 1
14 V
GND 2 13 NC
V- 3 Σ 12 V+
V+
4 11 FB
V- 5 10 REF
NC 6 9 NC
8
GAIN 7 GAIN
MB88346BPFV (IC3)
12 BIT SHIFT REGISTER
D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11
20
VSS 1 GND
ADDRESS
A03 19 A02
2
DECODER
8
12
1 2 3 4 12
A04 18 A01
3
D0 D7 D0 D7
A05 4
17 DI
8 BIT 8 BIT
1
LATCH LATCH
A06 5 16 CLK
8 BIT 8 BIT
R-2R R-2R
D/A CONVERTER D/A CONVERTER
A07 6 15 LD
A08 7 14 DO
A09 8 13 A12
A10 9 12 A11
VDD 10 11 VCC
A01 A12
TC4W53F (IC101, 102, 201, 202, 301, 302,
401, 501, 601, 450, 550, 650)
COMMON 1 8 VDD
OUT IN
INH 2 C CH0
7
LOGIC LEVEL
CONVERTOR
VEE 3 6 CH1
OUT IN
C
VSS 4 5 A
9-10