Sony STR-DB798 Service Manual ▷ View online
57
STR-DB798
IC371 MM1093PFB (AEP, UK model)
MM1093NF (Taiwan model)
APC1
4FSC
VCO
FSC
VCXO
ACC
DET
DET
DIVIDER
(1/4)
BGP
GEN
GEN
2ND
BPA
BPA
SYNV
SEP
9
8
7
APC2
11
5
1ST
BPA
13
3
10
6
12
4
14
2
15
OSC R
NC
VCC1
FSC
OUTPUT
VCC2
GND2
OSC C
GND1
APC2
FILTER
X
, TAL
4FSC
OUTPUT
APC1
FILTER
BURST GATE
FILTER
ACC
FILTER
1
16
COMPOSITE
INPUT
CHROMA
INPUT
IC372 NJM2268D
1
2
4
VIN1
GND
3
VSAG1
VOUT1
75
Ω
DRIVER
6dB
AMP
CLAMP
8
7
5
VIN2
V+
6
NC
VOUT2
75
Ω
DRIVER
6dB
AMP
BIAS
58
STR-DB798
IC1304 NJM2586AM
CONT2
CONT2
CONT1
CONT1
CONT1
1
CH1 IN1
2
SW1
4
SW2
24 CH1 OUT
23 PS
BIAS
3
CH1 IN2
BIAS
5
CH1 IN3
6
GND
7
V+1
BIAS
11
GND
12
CH2 IN3
BIAS
8
CH2 IN1
9
GND
BIAS
10
CH2 IN2
BIAS
75
Ω
DRIVER
6dB
AMP
22 CH2 OUT
75
Ω
DRIVER
6dB
AMP
21 V+2
20 CH3 OUT
19 GND
18 V–2
16 V–1
17 CH3 IN1
75
Ω
DRIVER
6dB
AMP
BIAS
15 CH3 IN2
BIAS
13 CH3 IN3
14 GND
BIAS
CONT2
IC101 TC9274N-017
– AU-IN Board –
1
2
3
4
5
6
7
8
9
10
11
12
20
21
42
40
40
39
38
37
36
35
34
33
32
31
23
22
VSS
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
GND
CK
VDD
STB
DATA
18BIT
LATCH
CIRCUIT
(R-CH)
18BIT
LATCH
CIRCUIT
(L-CH)
LEVEL SHIFT & SHIFT REGISTER
13
S12
30 S12
14
S13
29 S13
15
S14
28 S14
16
S15
27 S15
17
S16
26 S16
19
S18
24 S18
18
S17
25 S17
59
STR-DB798
– MAIN Board –
IC173 TC9273F-012 (EL)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VSS
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
GND
CK
VDD
STB
DATA
10BIT
LATCH
CIRCUIT
(R-CH)
10BIT
LATCH
CIRCUIT
(L-CH)
LEVEL SHIFT & SHIFT REGISTER
IC401, 501, 601, 651 CXD9725M
TRIM VOLUME
0-+24dB/
1dB STEP
TRIM VOLUME
0-+24dB/
1dB STEP
5 to 25 DECODER
&
LATCH CIRCUIT
4 to 13 DECODER
&
LATCH CIRCUIT
4 to 16 DECODER
&
LATCH CIRCUIT
24 BIT
SHIFT REGISTER
CIRCUIT
LEVEL SHIFT
CIRCUIT
5 to 25 DECODER
&
LATCH CIRCUIT
4 to 13 DECODER
&
LATCH CIRCUIT
4 to 16 DECODER
&
LATCH CIRCUIT
2
VSS
3
TRIM
4
TRIM
5
TRIM
6
OUT
7
VRGND
9
VRIN
8
NC
11
CS1
10
NC
14
NC
1
NC
12
GND
13
CLK
26 TRIM
25 TRIM
24 TRIM
23 OUT
22 VRGND
20 VRIN
21 NC
28 NC
18 CS2
19 NC
15 NC
17 LAT
16 DATA
26 VDD
MAIN
VOLUME
0- –95dB/
0.5dB STEP
MAIN
VOLUME
0- –95dB/
0.5dB STEP
60
STR-DB798
IC1001 uPD16315GB-3BS
– DISPLAY Board –
5
OSC
OSC
DATA
SELECTOR
6
DOUT
7
DIN
8
CLK
9
STB
10
KEY1
11
KEY2
SERIAL
INTERFACE
DISPLAY MEMORY
24 BITS x 12 WORDS
24-BIT OUTPUT
LATCH
12-BIT SHIFT
REGISTER
SEGMENT
DRIVER
TIMING GENERATOR
KEY SCAN
COMMAND
DECODER
DIMMING
CIRCUIT
KEY DATA MEMORY
(2 x 16 BITS)
4-BIT LATCH
1
LED1
2
LED2
3
LED3
4
LED4
24
16
16
12
4
8
8
4
8
27 SEG14/KS14
29 SEG16/KS16
30 VEE
28 SEG15/KS15
8
31 SEG17/GRID12
33 SEG19/GRID10
32 SEG18/GRID11
23 SEG10/KS10
24 SEG11/KS11
25 SEG12/KS12
26 SEG13/KS13
22
SEG9/KS9
21
SEG8/KS8
20
SEG7/KS7
19
SEG6/KS6
18
SEG5/KS5
17
SEG4/KS4
16
SEG3/KS3
15
SEG2/KS2
14
SEG1/KS1
MULTIPLEXED
DRIVER
34
SEG20/GRID9
35
SEG21/GRID8
36
SEG22/GRID7
37
SEG23/GRID6
39
GRID4
40
GRID3
41
GRID2
42
GRID1
43
VDD
44
VSS
13
VDD
12
VSS
38
SEG24/GRID5
GRID
DRIVER
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