Sony STR-DB870 Service Manual

39
STR-DB870/DB1070
IC307 MB90089F-G-238-BND (VIDEO Board (STR-DB1070))
IC308 NJM2296D (VIDEO Board)
IC750, 752 NJM2296D (S-VDIEO Board)
IC309, 311 LA7213 (VIDEO Board
(STR-DB1070: AEP, UK, E and Chinese models))
ANALOG
SWITCH
SERIAL
INPUT
CONTROL
VIDEO
SIGNAL
GENERATOR
CIRCUIT
4 FSC
CLOCK
OSCILLATOR
CIRCUIT
FOR
COLOR
BURST
DATA
OUTPUT
CONTROL
NTSC/PAL
SIGNAL GENERATOR
CIRCUIT
H/V
SEPARATE
CIRCUIT
DISPLAY
MEMORY
CONTROL
CGROM
CHARACTER
VRAM
VIDEO PHASE SYNC
YIN
CIN
VIN
HSYNC
VSYNC
EXS
VBLK
FSCO
AVCC
XS
EXHSYN
EXVSYN
VSS
1
2
3
10
11
8
6
5
4
9
12
13
14
YOUT
AVSS
COUT
VOUT
CS
SIN
SCLK
VOC0
VOC1
VOC2
VOB
XD
EXD
27
26
25
28
24
23
22
20
19
18
17
16
15
VCC
7
TEST
21
DOT-CLOCK
GENERATOR
CIRCUIT
9
S5
S6
S7
S4
S1
S2
S3
Vout1
Vout2 Vout3
V-
GND
SW3
SW2SW1
SW5 SW4
Vin1 Vin2
Vin3Vin4Vin5
V+
10111213141516
1 52 3 4 6 7 8
1
SYNC
SEP
V-SYNC
SEP
2 3
4 5
V IN
HD
VSS
VD
VDD
IC403, 503, 603 µPC2581V (MAIN Board (IC603: STR-DB1070))
2
3
5
4
6
7
98
1
MUTE
+ VOUT1 – VOUT1
COMP1
MF1
IN1
GND
IN2
NF2
COMP2
– VOUT2 + VOUT2
VCC1 VCC2
VEE
PROTECTOR
BIAS CIRCUIT
REG DRIVE
PRE
DRIVE
11
10
12
13
1514
DRIVE
PRE
DRIVE

Sony STR-DB870 Specifications

General

Brand	Sony
Model	STR-DB870
Category	Stereo Receiver
Language	English