Sony SAVA-57 Owners manual
SAVA-57
SERVICE MANUAL
• FRONT SPEAKER SYSTEM• REAR SPEAKER• TRANSMITTER
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
Chinese Model
SPECIFICATIONS
MICROFILM
HOME THEATER ACTIVE SPEAKER SYSTEM
— 1 —
SECTION 4
TEST MODE
SECTION 5
ELECTRICAL ADJUSTMENT
MODE ALL FLUORESCENT INDICATOR TUBES LIGHT
When the AC plug is inserted to the power outlet with pressing the
MASTER VOL + button, the all fluorescent indicator tubes light.
KEY CHECK, LED LIGHTING MODE
1. Pull out the AC plug from the power outlet and turn the power
OFF.
2. Connect the lead wire to TP3 on the KEY board.
3. Insert the AC plug to the power outlet and set to STANDBY
mode.
4. Let the lead wire connected in step 1 contact to the ground.
5. All fluorescent indicator tubes light, and enter the key check
mode.
6. Pressing any buttons, the number of button will be displayed on
the fluorescent indicator tube.
7. After all buttons are pressed, it will be in the STANDBY mode.
Button Button Number
POWER
MASTER VOL –
MASTER VOL +
INPUT
SURROUND
CTR MODE
S.WOOFER
2
3
4
5
6
7
8
LED Color
Red
Green
Red
Green
Red
Green
Red
Note:
1. The LED (D505) lights while pressing each button.
The LED lights in red when even number of b uttons are pressed,
and it lights in green when odd number of buttons are pressed.
2. The LED lights even when the pressed button is pressed again.
• Parts Location
[KEY BOARD] — Conductor side —
CARRIER FREQUENCY Adjustment
Note:
Set the transmitter to the user's environment, connect it to the front
speaker, and supply the power. (Refer to Service Note.)
Setting:
TP5
frequency counter
Transmitter
board
R226
TP6
Procedure:
1. Connect the frequency counter to TP5 and TP6 of the two ends
of the resistor (R226) of the TRANSMITTER board.
2. Turn ON the power of the front speaker.
3. Adjust L201 of the TRANSMITTER board, and adjust so that
the reading of the frequency counter is 4.3 MHz ± 0.01 MHz.
RECEIVING FREQUENCY, MUTING LEVEL adjustment
Note:
Perform procedure 1 if using FM RF SSG and procedure 2 if not.
However, as procedure 2 is a simple procedure, adjustment is not
accurate.
• Procedure 1
Setting:
FM RF SSG
Carrier frequency : 4.3MHz
Modulation : no moduration
Output level : 40dB (at 75
Ω
open)
TP7
Receiver
board
L1
level meter
Receiver
board
TP102
TP8
S506
TP3
IC503
R557
CN552
Procedure:
1. Connect SSG to TP7 and TP8 of the two ends of the coil (L1) of
the RECEIVER board.
2. Set the output level of SSG to 40 dB.
3. Insert the A C plug of the unit to the power outlet and supply the
power .
4. Adjust IFT103 of the RECEIVER board, and adjust so that the
voltage of both ends of TP102 becomes 0V. (RECEIVING FREQUENCY adjustment)
5. Adjust the output level of SSG to 22 dB.
6. Adjust RV102 until D109 turns green from red. (MUTING
LEVEL adjustment)
— 6 —
• Procedure 2
Note:
The adjustment results of this procedure differs according to the
distance between the transmitter and rear speaker.
Leave ample distance between the transmitter and rear speaker according to the user's using environment when performing the adjustment.
Procedure:
1. Connect the transmitter to the front speaker and turn the power
supply on.
2. Adjust IFT103 of the RECEIVER board, and adjust so that the
voltage of the two ends of TP102 becomes 0V. (RECEIVING
FREQUENCY adjustment)
3. Adjust R V102 of the RECEIVER board of the rear speaker until
D109 turns green. (MUTING LEVEL adjustment)
4. Turn OFF the power turned on at STEP 1.
5. Check that D109 of the RECEIVER board of the rear speaker
becomes red.
If green, adjust RV102 so that it turns red, turn ON the power
again, and repeat from step 3.
6. After adjusting, check that D109 becomes red when the power
of the front speaker is turned OFF and it becomes green when
the power is turned ON.
[RECEIVER BOARD] — Component side —
Reference Information:
For this adjustment, the reaching distance of the infrared rays increases when the MUTING LEVEL (sensitivity) is raised, but if the
power of the front speaker is turned OFF, pop noises are produced
from the rear speaker.
If the MUTING LEVEL (sensitivity) is dropped on the other hand,
pop noises are reduced, but the reaching distance of the infrared
rays decreases.
Adjust according to the user's using environment.
JW111JW107
TP8
L1
TP7
D1
RECEIVING
FREQUENCY
RECEIVING
FREQUENCY
&
MUTING
LEVEL
IFT103
JW108
JW132
JW109
JW110
IC104
TP102
JW115
JW116
JW117
JW118
RV102
MUTING
LEVEL
JW112
JW133
JW113
JW114
JW119
JW120
JW121
JW122
[TRANSMITTER BOARD] — Component side —
SCN101
IC202
CN201
— 7 —
L201
R226
TP5
TP6
CARRIER FREQUENCY
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