Sony DAV-DZ970WA / HCD-DZ970WA Service Manual ▷ View online
HCD-DZ970WA
25
9. PROTECTION FACTOR (SD DETECTION/
DC DETECTION) IDENTIFICATION TEST MODE
When an error is detected, the FL tube alternately displays
“PROTECTOR h PUSH POWER”.
“PROTECTOR h PUSH POWER”.
r
Press the [
?/1
] button.
* Buttons other than the [
?/1
] button are invalid.
“STANDBY” blinks three times on the FL tube.
r
r
The protection release state (POWER OFF) is established.
(No FL tube display)
r Press the [
(No FL tube display)
r Press the [
?/1
] button two times.
The power to the system turns on, and the normal operation is
established. (Restore)
established. (Restore)
During the protection state:
1. If the AC plug is connected or disconnected during the
1. If the AC plug is connected or disconnected during the
protection state, the protection state is released, and the
normal operation is established. (The protection state is not
maintained.)
normal operation is established. (The protection state is not
maintained.)
2. The protection factor is displayed by pressing the [FUNCTION],
[
A
] and [
>
] buttons at the same time during the protection
state
(during the “PROTECTOR h PUSH POWER” display).
k When SD is detected: Repeats
“SD
DETECT
h PROTECTOR”.
k When DC is detected: Repeats
“DC
DETECT
h PROTECTOR”.
PL: SD detection
When the “L” output from the SD (shutdown) port on the
S-MASTER POWER Driver Shutdown and voltage descent
(15V or less) of 30V power supply (PVDD) are detected.
S-MASTER POWER Driver Shutdown and voltage descent
(15V or less) of 30V power supply (PVDD) are detected.
DC
detection
When the “L” output from the power/speaker error detection
circuit (DC detection port) is detected for two seconds
continually, the power system other than that of the FL tube
is turned off, and the protection state is established.
circuit (DC detection port) is detected for two seconds
continually, the power system other than that of the FL tube
is turned off, and the protection state is established.
HCD-DZ970WA
26
SECTION 5
ELECTRICAL ADJUSTMENTS
When the optical pick-up assy is replaced, perform the
“EXECUTING IOP MEASUREMENT”.
“EXECUTING IOP MEASUREMENT”.
EXECUTING IOP MEASUREMENT (See page 22)
[FM Tune Level Check]
Procedure:
1. Turn the power on.
2. Input the following signal from Signal Generator to FM
1. Turn the power on.
2. Input the following signal from Signal Generator to FM
antenna input directly.
* Carrier Freq : A = 87.5 MHz, B = 98 MHz, C = 108 MHz
Deviation : 75 kHz
Modulation : 1 kHz
ANT input : 35 dBu (EMF)
Note: Please use 75 ohm “coaxial cable” to connect SG and the set. You
cannot use video cable for checking.
Please use SG whose output impedance is 75 ohm.
3. Set to FM tuner function and tune A, B and C signals.
4. Confi rm “TUNED” is lit on the display for A, B and C
4. Confi rm “TUNED” is lit on the display for A, B and C
signals.
The mark of “TUNED” means “The selected station signal is
received in good condition.”
received in good condition.”
generator
OUT (75
Ω)
SET
DVD SECTION
TUNER SECTION
HCD-DZ970WA
HCD-DZ970WA
27
27
SECTION 6
DIAGRAMS
For Schematic Diagrams.
Note:
• All capacitors are in
• All capacitors are in
μF unless otherwise noted. (p: pF) 50
WV or less are not indicated except for electrolytics and
tantalums.
tantalums.
• All resistors are in
Ω and 1/4 W or less unless otherwise
specifi ed.
• f :
internal
component.
• C : panel designation.
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
(In addition to this, the necessary note is printed in each block.)
• A : B+ Line.
• B : B– Line.
• Voltages and waveforms are dc with respect to ground
• B : B– Line.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
• Voltages and waveforms are dc with respect to ground in
service mode.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production
Voltage variations may be noted due to normal production
tolerances.
no mark : TUNER (FM)
< > : DVD PLAY
< > : DVD PLAY
*
: Impossible to measure
• Voltages are taken with VOM (Input impedance 10 M
Ω).
• Circled numbers refer to waveforms.
• Signal path.
F :
F :
TUNER
J
: DVD PLAY
L :
VIDEO
E :
Y
a :
CHROMA
r : COMPONENT VIDEO
N :
N :
MIC
For Printed Wiring Boards.
Note:
• X : Parts extracted from the component side.
• a :
• X : Parts extracted from the component side.
• a :
Through
hole.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
• Indication of transistor.
C
B
These are omitted.
E
Q
C E
B
These are omitted.
Caution:
Pattern face side:
(SIDE B)
Parts face side:
(SIDE A)
Pattern face side:
(SIDE B)
Parts face side:
(SIDE A)
Parts on the pattern face side seen from
the pattern face are indicated.
Parts on the parts face side seen from
the parts face are indicated.
the pattern face are indicated.
Parts on the parts face side seen from
the parts face are indicated.
Note: The components identifi ed by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specifi ed.
• Circuit Boards Location
SPEAKER board
S-AIR-CON board
IO-COMPONENT board
SCORE board
MAIN board
DSP board
POWER board
MS-203 board
SERIPARA board
P-SW board
FL board
JACK board
HCD-DZ970WA
HCD-DZ970WA
28
28
• Waveforms
– MAIN Board –
IC1101 (DVDRFIP)
200 mV/DIV, 100 ns/DIV
IC1101 [
Y (R/Cr/Pr)
500 mV/DIV, 20
μs/DIV
IC1101 [
D (B/Cb/Pb)
500 mV/DIV, 20
μs/DIV
IC1101 [
C (Y/G)
1 V/DIV, 20
μs/DIV
IC1101 [
(C)
1 V/DIV, 20
μs/DIV
IC1101 [[ (Y)
1 V/DIV, 20
μs/DIV
IC1101 YD
(XTALO)
500 mV/DIV, 20 ns/DIV
IC501 RE (Xout)
1 V/DIV, 100 ns/DIV
IC702 XB (XOUT (O))
1 V/DIV, 20 ns/DIV
IC3010 RG (XFSOOUT)
1 V/DIV, 10 ns/DIV
RB
IC3010 SL (XFSOIN)
1 V/DIV, 10 ns/DIV
RT
IC3051 (3Y)
1 V/DIV, 10 ns/DIV
0.72Vp-p
0.72Vp-p
H
1Vp-p
H
1Vp-p
H
H
1Vp-p
4.3Vp-p
49.1MHz
1.6Vp-p
27MHz
4.3Vp-p
49.1MHz
4.3Vp-p
49.1MHz
3.4Vp-p
4Vp-p
5MHz
12.288MHz
650mVp-p
H
– IO-COMPONENT Board –
IC404 (Cin)
1 V/DIV, 20
μs/DIV
IC404 (Yin)
1 V/DIV, 20
μs/DIV
IC404 (CYin)
1 V/DIV, 20
μs/DIV
IC404 RT (Cb in)
500 mV/DIV, 20
μs/DIV
IC404 RG (Cr in)
500 mV/DIV, 20
μs/DIV
IC404 X (CY OUT)
1 V/DIV, 20
μs/DIV
IC404 RL (Cb OUT)
500 mV/DIV, 20
μs/DIV
IC404 RI (Cr OUT)
500 mV/DIV, 20
μs/DIV
IC404 XE (CVBS OUT)
500 mV/DIV, 20
μs/DIV
0.72Vp-p
0.72Vp-p
H
1Vp-p
H
1Vp-p
H
H
1Vp-p
H
0.72Vp-p
0.72Vp-p
H
1Vp-p
H
H
H
1.3Vp-p
– DSP Board –
IC700 [WD (XTAL)
0.5 V/DIV, 10 ns/DIV
1.8Vp-p
25MHz
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