Sony SAT-B2/2 User manual

SERVICE MANUAL
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SAT-B2/2
DIGITAL SATELLITE RECEIVER
MICROFILM] _pIgiTAL SATELLITE SYSTEM ®

SAT-B2/2
Specifications
Input Jacks UHF/VHF
75 ohm external terminal
Satellite Antenna
75 ohm external terminal
CONTROL-S IN/S-LINK (mini-jack) 5Vp-p
AC Power (120V 60 Hz)
Output Jacks S-VIDEO OUT
4-pin mini DIN
VIDEO (phono jacks) (2)
AUDIO R/L (phono jacks) (2)
VHF (SAT)/UHF
Wide Band Data
15-pin D-Sub Female
TEL LINE
VCR MOUSE/CONTROL-S OUT (mini-jack)
Input
Frequency 950 - 1450 Mhz
Power
Requirements 120V AC, 60 Hz
Power
Consumption 20 W max.
Dimensions 16.9 x 3.2 x 10.8 inches
(w/h/d) 430 x 85 x 290 mm
Weight Set: 10.8 lb (4.9 kg)
Unit: 6.4 Ib (2.9 kg)
Supplied Remote Commander, RM-Y129
Accessories Size AA Batteries (2)
Access Card (1)
Audio/Video Cable (1)
RF Cable (1)
Telephone Cable (1)
AC Power Cord
VCR Mouse, RM-VM101
Design and specifications subject to change without notice.
Optional Sony-brand DSS Accessories
Installation Kit Voltage Switch Universal Remote Commander _— Coaxial Cable (75 ft.)
ANJ-DSI ECA-DV1 RM-Y130 SAK-C75
In-line Amplifier Multi-Room A/V Distribution Syskm Flat Cable Dish Antennas
EAC-DA1 MDR-Di SAK-F1 SAT-18S1
Diplexer IR Target (for MRD-D1 System) Coaxial Cable (25 ft.) SAT-18D1
EAC-DD1 EAC-T1 SAK-C25 _

SAT-B2/2
Specifications
SAFETY CHECK-OUT
1. Check the area of your repair for unsoldered or poorly-sol-
dered connections. Check the entire board surface for sol-
der splashes and bridges.
2. Check the interboard wiring to ensure that no wires are
“pinched” or contact high-wattage resistors.
3. Check that all contro! knobs, shields, covers, ground straps,
and mounting hardware have been replaced. Be absolutely
certain that you have replaced all the insulators.
4. Look for unauthorized replacement parts, particularly tran-
sistors, that were installed during a previous repair. Point
them out to the customer and recommend their replacement.
LEAKAGE TEST
The AC leakage from any exposed metal part to earth ground
and from all exposed metal parts to any exposed metal part
having a return to chassis, must not exceed 0.5 mA (500 mi-
croamperes). Leakage current can be measured by any one of
three methods.
1. Acommercial leakage tester, such as the Simpson 229 or
RCA WT-540A. Follow the manufacturers’ instructions
to use these instruments.
2. Abattery-operated AC milliammeter. The Data Precision
245 digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of
a VOM or battery-operated AC voltmeter. The “limit” in-
dication is 0.75 V, so analog meters must have an accu-
rate low-voltage scale. The Simpson 250 and Sanwa SH-
63Trd are examples of passive VOMs that are suitable.
Nearly all battery operated digital multimeters that have
a2 VAC range are suitable. (See Figure 1)
5. Look for parts which, though functioning, show obvious
signs of deterioration. Point them out to the customer and
recommend their replacement.
6..Check the line cords for cracks and abrasion. Recommend
the replacement of any such line cord to the customer.
7. Check the B+ and HV to see if they are specified values.
Make sure your instruments are accurate; be suspicious of
your HV meter if sets always have low HV.
8. Check the antenna terminals, metal trim, “metallized”
knobs, screws, and all other exposed metal parts for AC
leakage using one of the methods listed.
To Exposed Metal
Parts on Set
AC
Voltmeter
TC (0.75 V)
— Earth Ground
Figure 1. Using an AC voltmeter to check AC leakage.

SAT-B2/2
SECTION
1.
TABLE OF CONTENTS
TITLE PAGE
Genoral.. s.¢.5 u8Ues Deedee Be tS he ees 5
Disassembly
2-1. UpperCaseRemoval ...........2.2..0000 10
2-2. HAandHB BoardsRemoval ............... 10
2-3. A, G,SC Board, DSS Front End Module Removal. .... . 10
Diagrams
3-1. Block Diagrams. ... 2... 0... 0... ee eee 11
3-2. Circuit BoardsLocation ............02.22804 14
3-3. Schematic Diagrams and Printed Wiring Boards. ...... 14
(1) Schematic Diagrams of HA andHB Boards. ..... 16
(2) Schematic Diagrams of G, SC and A (1/4) Boards . . . 17
(3) Schematic Diagram of A Board (2/4) ......... 20
(4) Schematic Diagram of A Board (3/4) ......... 23
(5) Schematic Diagram of A Board (4/4)... .....2.. 26
(6) A Board PCB and Components Location. ...... 29
3-4. Semiconductors... ...... 0.00.00 eee eae 32
Exploded Views
41; “SAT-B2/2). 3) & easel ee ob ee eo oe aed as ele ce te 33
Electrical Parts List.................00 000s 34
SAFETY-RELATED COMPONENT WARNING!!
/ Components identified by shading and mark /
| on the schematic diagrams, exploded views and |
_ in the parts list are critical for safe operation. |
| Replace these components with Sony parts |
| whose part numbers appear as shown in this |
manual or in supplements published by Sony. |
| Circuit adjustments that are critical for safe op- |
| eration are identified in this manual. Follow these |
| procedures whenever critical components are |
| replaced or improper operation is suspected. |

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SECTION 2
DISASSEMBLY
2-1. Upper Case Removal © Upper Case
@ Five Screws
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DIAGRAMS
3-1. BLOCK DIAGRAMS
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3-2. Circuit Boards Location
Front End
Module
3-3. Schematic Diagrams and Printed Wiring Boards
NOTE:
All capacitors are in iF unless otherwise noted. PF: pyF 50
WV or less are not indicated except for electrolytic.
Indication of resistance, which does not have one for rating
electrical power, is as follows.
Pitch: 5 mm
Rating electrical power 1/4 W (CHIP: 1/10W)
All resistors are in ohms.
Bet: nonflammable resistor.
wt: fusible resistor.
A: internal component.
Ca): panel designation, and adjustment for repair.
All variable and adjustable resistors have characteristic curve
B, unless otherwise noted.
lis earth-ground.
* rh: earth-chassis.
+ Ail voltages are in V.
+ Readings are taken witha 10 MQ digital multimeter.
+ Readings are taken with a color-bar signal input.
* Voltage variations may be noted due to normal production
tolerances.
*
. : Cannot be measured.
° —— ; B+bus.
—m: B-bus.
NOTE:
The components identified by shading
and A mark are critical for safety.
Replace only with part number specified. |

[FRONT PANEL|
NOTE:
Portions of the circuit marked as shown are high
voltage areas. Use care to prevent electric
shocks during inspection or repair.
[PoweR SUPPLY |
RISK OF FIRE,
REPLACE FUSE
AS MARI
a, |

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—16—

— A BOARD (Component Side) —
MICROPROCESSOR/ASIC,
MPEG AV / NTSC,
TPT / MODEM LS / HS DATA,
FRONT END INTERFACE
fit
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*A BOARD Component location
Component Conductor Component Conductor
Side Side Side Side
1¢100 C-8 C-3 A-7
IC101 D-8 D-4 - AT
{C102 C-6
1¢103 D-7 A-7
1C104 | D-10 A-7
IC106 - B-9
1C108 D-2
1C109 C-7 D-4
. 10150 C-5
IC300 B-3
1C301
1C302
1C303
10304
1C306
1C310
16312
1C317
IC500
1C501
IC502
IC503
10504
IC802
IC804
IC805 C4
Ic8i0—“‘“‘; AS
Component Conductor
Side Side
C-6
C-6
A-7
A7
CRYSTAL
Component Conductor
oraide Side
C-9
D-9
B-3
C-3
C-2
A-7
D-1
C-2
—31—

3-4. Semiconductors
CXK581000AM-70LL
(TOP VIEW)
HM514260AJ-8Z
40 21
1 20
(TOP VIEW)
M5218AFP
LM358PS
e765
in
1234
(TOP VIEW)
MC68340PV16CB1
SSI73K222U-IH
6 144 40
PCA911ACGMP1S
20 11
1 10
(TOP VIEW)
SLR-325MGT31
SLR-325DCA47
SLR-325VRT31
ANODE CATHODE
ATLS60-CD-01
80
(TOP VIEW)
MC14577CP
UPC358C
(TOP VIEW)
SN74HCO4ANS
SN74HCO4ANS-E20
TC74AC04F-EL
14 8
1 7
(TOP VIEW)
STMKASA
STI3520
{TOP VIEW)
H (TOP VIEW)
CXD2917Q DAN202K
CATHODE
HVU359TRF
<i
CATHODE
DAP202K
yp
x
1SS119-25
RD6.2ESB2
RD6.8SB2-T1
RD3.9ESB1
CATHODE
ANODE
2SA1162-Q
2SD601A-Q
Cc
B
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2SD2394-EF DTA114WSA-TP
LS
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2SD774-34
28C2785-HFE
2SA1175-HFE
LETTER SIDE
S2LA20F
S2L20UF
18S133T-77
: CATHODE
ANODE
D1i0SC4M
1,
2
UDZ-TE-17-6.8B
SBX1780-51
NJM78L05A
23
PIN 1.0UT
2.GND
3 LIN
TL431CLP-Z