Sony HT-K170 / TA-VE170 Service Manual ▷ View online
5
SECTION 3
TEST MODE
This equipment is provided with a test mode built in the microcomputer.
The contents are described in the following.
The contents are described in the following.
[Initial Mode]
1. Press
?
/
1
button while pressing both
[TV]
and
[5.1CH/DVD]
buttons simultaneously.
2. “INITIAL” is displayed on the fluorescent indicator tube, and
the status of the unit is set in the following.
•
All Memory is clear.
•
Center, rear level set to 0.
•
Center mode set to NORMAL.
•
Muting clear.
•
Volume level set to min.
•
FAN is on.
[Factory Mode]
1. Press
?
/
1
button while pressing three buttons of
[VIDEO]
,
[DVD 2CH]
, and
[5.1CH/DVD]
simultaneously.
2. Factory setting same as initial except center mode set to normal
using jog can set to volume max or min directly.
[FL Check Mode]
1. Press
?
/
1
button while both
[CENTER MODE]
and
[TV]
buttons
simultaneously.
2. Fluorescent indicator tube and LED are checked, “FINISH” is
displayed and the status of the unit is set back in normal condition.
[Gain Up Mode]
1. Press
?
/
1
button while pressing
[SOUND FIELD]
button.
2. “NOMAL” is displayed on the fluorescent indicator tube and
the rear is gained up 3 dB.
3. To exit from this mode, press two buttons in the same manner as
step1.
“GAIN LOW” is displayed on the fluorescent indicator tube and
the status of the unit is set back in normal condition.
“GAIN LOW” is displayed on the fluorescent indicator tube and
the status of the unit is set back in normal condition.
[Version Mode]
1. Press
?
/
1
button while pressing three buttons of
[CENTER MODE]
,
[DVD 2CH]
and
[SOUND FIELD]
buttons simultaneously.
2. Version of its destination is displayed on the fluorescent indicator
tube.
[FAN ON/OFF]
•
Press
?
/
1
button while pressing
[CENTER MODE]
button.
•
“FAN ON”
t fan always turn on.
•
“FAN AUTO”
t when micro computer detected enough input
signal fan turn on automatically. Normally fan is off.
6
• Circuit Boards Location
SECTION 4
DIAGRAMS
PW.SW borad
DISPLAY board
JOG board
MAIN board
STANDBY board
PRIMARY board
SECONDARY board
4-1. NOTES FOR PRINTED WIRING BOARD AND SCHEMATIC DIAGRAM
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
¢
: internal component.
•
2
: nonflammable resistor.
•
C
: panel designation.
Note on Printed Wiring Board:
• X
: parts extracted from the component side.
• b
: Pattern from the side which enables seeing.
• Indication of transistor.
•
U
: B+ Line.
•
V
: B– Line.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
• Signal path.
F
: FRONT/AUDIO IN
f
: REAR
E
: CENTER
j
: WOOFER
C
B
These are omitted.
E
Q
B
These are omitted.
C
E
Q
• Waveforms
– MAIN Board –
– MAIN Board –
1
IC300
#¡
(OSC)
– DISPLAY Board –
1
IC201
#¢
(X1)
3.4 Vp-p
8 MHz
4.3 Vp-p
4.19 MHz
Note:
The components identified
by mark
The components identified
by mark
0
or dotted line with
mark
0
are critical for safety.
Replace only with part num-
ber specified.
ber specified.
Note:
7
• IC Block Diagrams
– STANDBY Board –
– STANDBY Board –
IC950
NJM2103D
IC500
LC78212
– MAIN Board –
IC100
M62447SP
1
2
3
4
5
6
7
8
V+
VSB/SESIN
VSA
RESET
GND
OUTC
VSC
CR
VREF
+
–
–
+
–
+
–
+
Q
R
S
2
1
4
3
6
5
8
7
10
9
12
11
14
13
16
15
18
17
41
42
39
40
37
38
35
36
33
34
31
32
29
30
OUTPUT
PORT
MICRO
COMPUTER
INTERFACE
DVDD
CLK
DATA
LATCH
DGND
AGND
OUT4
OUT3
OUT2
OUT1
AVDD
SW IN
GND S
SR IN
SL IN
GND C
C IN
GND R1
GND R2
GND L1
GND L2
R IN
GND LR
L IN
SW OUT
SR OUT
SL OUT
SL OUT
C OUT
R OUT
NC
L OUT
AVSS1
AVSS2
22 – 28
NC
21 – 19
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
CONTROL
LATCH
SHIFT RESISTOR
LEVEL SHIFT
CL
DI
CE
VEE
OUT
IN
OUT
IN
OUT
IN
VSS
S
RESET
VDD
OUT
IN
IN
OUT
IN
OUT
IN
8
IC300
LV1035M
STRIM
OSC
VOL
VOL
VCA
VCA
A
B
A
B
VCA
VCA
VCA
VCA
VCA
VCA
DEV
NOISE
GEN
NOISE
FILTER
BPF
CONTROL
CH
CONTROL
BPF
V REF
STRIM
S
MODE
RECT
RECT
DC
CUT
B NR
OUT
FILTER
DATA
DECODER
VOL/
MUTE
BPF
RECT
LOGIC
FF
LOGIC
FF
RECT
C MODE
LOGIC
LOGIC
S
S
S
A
A
S
B
B
B
A
B
C
B
L
R
A
A
A
B
A
B
A
B
A
B
A
B
S
VDD
PCM
PCM
CONTROL
SRAM
IN
FILTER
R
L
C
S
R
A
B
A
B
A
B
A
B
L
L
R
L
R
R BPF2
R BPF1
S DC OUT
C DC OUT
R DC OUT
L DC OUT
V REF
VCC
C OUT
S OUT
R OUT
L OUT
GND
L IN
R IN
S IN
DELAY OUT
L BPF2
L BPF1
RT IN
LT IN
DC CUT
C MODE
GND
NS BPF1
NS BPF1
OSC
NS BPF2
ENABLE
DATA
CLK
DATA
CLK
VSS
OSC
OSC
VDD
A/D
NS
D/A
DC CUT
DC CUT
VCC
DET
IREF
GND
S-OUT
R-OUT
L-OUT
L RECT
DC CUT4
R RECT
DC CUT3
L BPF3
VLR TH
VLR 1
VLR 2
VCS 2
VCS 1
VCS TH
L+R RECT
DC CUT2
L-R RECT
DC CUT1
R BPF3
64 63 62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
41
40
39
38
37
36
35
34
33
18
17
16
15
14
13
12
11
10
9
7
3
4
5
6
1
2
8
19 20 21
22
23
24
25
26
27 28 29
30
31
32
42
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