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PDF STR-W777 Data sheet ( Hoja de datos )
| Número de pieza | STR-W777 | |
| Descripción | FM STEREO/FM-AM RECEIVER SERVICE MANUAL | |
| Fabricantes | Sony | |
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SERVICE MANUAL
STR-W777
AEP Model
UK Model
E Model
Australian Model
STR-W777 is the tuner and amplifier
section in MHC-W777AV.
SPECIFICATIONS
Amplifier section
(Saudi Arabia, Singapore, Malaysia,Thai, Australian)
The following measured at AC 230V 50/60 Hz
DIN power output (Rated) (FRONT)
95 + 95W (6 Ω at 1kHz DIN)
Continuous RMS power output (Reference)
FRONT SPEAKER: 110 + 110W
(6 Ω at 1kHz, 10% THD)
CENTER SPEAKER: 55W
(8 Ω at 1kHz, 10% THD)
REAR SPEAKER: 35 + 35W
(8 Ω at 1kHz, 10% THD)
The following measured at AC 120, 220, 240V 50/60Hz
DIN power output (Rated) (FRONT)
100 + 100W (6 Ω at 1kHz DIN)
Continuous RMS power output (Reference)
FRONT SPEAKER: 120 + 120 W
(6 Ω at 1kHz, 10% THD)
CENTER SPEAKER: 60W
(8 Ω at 1kHz, 10% THD)
REAR SPEAKER: 40 + 40W
(8 Ω at 1kHz 10% THD)
Peak music power output 2400W
(AEP, UK, East European, CIS)
DIN power output (Rated) (FRONT)
80 + 80W (6 Ω at 1kHz DIN)
Continuous RMS power output (Reference)
FRONT SPEAKER: 100 + 100W
(6 Ω at 1kHz, 10% THD)
CENTER SPEAKER: 60W
(8 Ω at 1kHz, 10% THD)
REAR SPEAKER: 35 + 35W
(8 Ω at 1kHz, 10% THD)
Music power output (Reference)
FRONT SPEAKER: 190 + 190 W
(6 Ω at 1kHz, 10% THD)
CENTER SPEAKER: 90W
(8 Ω at 1kHz, 10% THD)
REAR SPEAKER: 55 + 55W
(8 Ω at 1kHz, 10% THD)
Inputs
MD/VIDEO 1 IN (phone jacks): voltage
450/250mV, impedance 47kΩ
AV INPUT AUDIO (phone jacks): voltage
250mV, impedance 47kΩ
MIX MIC (phone jack): sensitivity 1mV,
impedance 10kΩ
— Continued on next page —
MICROFILM
FM STEREO/FM-AM RECEIVER
1 page  
SECTION 2
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
2-1. SLIDING PANEL ASSEMBLY
4 Flat type cable (19 core)
Slide mechanism
1 Push the OPEN/CLOSE button to
open the Sliding panel assembly.
5 Sliding panel assembly
• NOTE FOR INSTALLATION (LEVEL SLIDER)
1 Screw (BVTP2.6x8)
3 Top bracket
2 Screw (BVTP 3x8)
3 Holder level
8 Remove the Level slider direction of arrow.
4 Four screw
(BVTP2.6x8)
2 Screw
(BVTP2.6x8)
a
b
5 Holder (L) assembly
7 Holder (R) assembly
a
NOTE :
Attach in the reverse order, but make sure the rollers (a, b) of the
holder (L) assembly and holder (R) assembly fit into the grooves of
the level slider.
b
—5—
6 Four screw (BVTP2.6x8)
5 Page 
FM Polar Adjustment (East European, CIS model)
Connection 1 :
FM RF SSG
75 Ω coaxial
set
FM antenna
terminal (75 Ω)
Carrier frequency: 69 MHz
Output level:
1 mV (60 dBµ) (at 75 Ω open)
Modulation:
AUDIO 1 kHz, 10 kHz deviation
Connection 2 :
AF OSC
FM RF SSG
75 Ω coaxial
set
Audio 31.25 kHz
external
modulation
terminal
FM antenna
terminal (75 Ω)
Carrier frequency: 69 MHz
Output level:
1 mV (60 dBµ) (at 75 Ω open)
Modulation:
AUDIO 31.25 kHz, 10 kHz deviation
(EXTERNAL MODULATION)
Adjustment Location:
[TCB BOARD] (Conductor Side)
level meter
frequency counter
TP1701
(FILTER)
IC1701
TP1702
(VCO)
Procedure :
1. Set the modulation of FM RF SSG to AUDIO 1 kHz, 10 kHz
deviation according to “Connection 1”.
2. Tune the set to 69 MHz.
3. Adjust the RV1702 so that the reading of frequency counter
connected to TP1702 (VCO) becomes within 31.25 kHz ± 0.05
kHz. (VCO adjustment)
4. Then record the reading of the level meter connected to TP1701.
5. Set the modulation of FM RF SSG to AUDIO 31.25 kHz, 10
kHz deviation according to “Connection 2”.
6. Tune the set to 69 MHz.
7. Set the CT1701 to be mechanical center.
8. Adjust the L1701 so that the reading of the level meter
connected to TP1701 (FILTER) becomes maximum.
Then adjust the CT1701 so that the reading of the level meter
connected to TP1701 (FILTER) becomes maximum. (SUB
CARRIER PEAK Adjustment)
9. Adjust the RV1701 so that the level at the moment becomes 14
dB higher value than the level recorded in step 4. (SUB
CARRIER LEVEL Adjustment)
Adjustment Location: TCB board
[TCB BOARD] (Component Side)
L1701
CT1701 Sub Carrier Peak
RV1701
Sub Carrier
Level
IC1701
RV1702
VCO
— 11 —
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet STR-W777.PDF ] | |
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