Samsung DSR9400VIA Service manual

DIGITAL SATELLITE RECEIVER

DSR9400 FTA DSR9400 EM VIA

SERVICE

1. Precautions

2. Operating Instructions

3. Software Upgrade and Installation

4. Troubleshooting

5. Exploded View and Parts List

6. Electrical Parts List

7. PCB Diagrams

8. Schematic Diagrams

Manual

DIGITAL SATELLITE RECEIVER CONTENTS

SERVICE MANUAL

DSR9400 (FTA, EM VIA)

ELECTRONICS

Printed in Korea

MF82-00009A

Samsung Electronics 1-1

1. Precautions

1. Be sure that all of the built-in protective devices are replaced. Restore any missing protective shields.

2. When reinstalling the chassis and its assemblies, be sure to restore all protective devices, including : control knobs and compartment covers.

3. Make sure that there are no cabinet openings through which people--particularly children

--might insert fingers and contact dangerous voltages. Such openings include the spacing between the picture tube and the cabinet mask, excessively wide cabinet ventilation slots, and improperly fitted back covers.

If the measured resistance is less than 1.0 megohm or greater than 5.2 megohms, an abnormality exists that must be corrected before the unit is returned to the customer.

4. Leakage Current Hot Check (See Fig. 1-1) : Warning : Do not use an isolation transformer during this test. Use a leakage current tester or a metering system that complies with American National Standards Institute (ANSI C101.1, Leakage Current for Appliances), and Underwriters Laboratories (UL Publication UL1410, 59.7).

5. With the unit completely reassembled, plug the AC line cord directly the power outlet. With the unit’s AC switch first in the ON position and then OFF, measure the current between a known earth ground (metal water pipe, conduit, etc.) and all exposed metal parts, including : antennas, handle brackets, metal cabinets, screwheads and control shafts. The current measured should not exceed

0.5 milliamp. Reverse the power-plug prongs in the AC outlet and repeat the test.

6. X-ray Limits : The picture tube is designed to prohibit X-ray emissions. To ensure continued X-ray protection, replace the picture tube only with one that is the same type as the original.

Fig. 1-1 AC Leakage Test

7. Antenna Cold Check : With the unit’s AC plug disconnected from the AC source, connect an electrical jumper across the two AC prongs. Connect one lead of the ohmmeter to an AC prong. Connect the other lead to the coaxial connector.

8. High Voltage Limit : High voltage must be measured each time servicing is done on the B+, horizontal deflection or high voltage circuits.

Heed the high voltage limits. These include the X-ray protection Specifications Label, and the Product Safety and X-ray Warning Note on the service data schematic.

9. Some semiconductor (“solid state”) devices are easily damaged by static electricity. Such components are called Electrostatically Sensitive Devices (ESDs); examples include integrated circuits and some field-effect transistors. The following techniques will reduce the occurrence of component damage caused by static electricity.

10. Immediately before handling any semiconductor

components or assemblies, drain the electrostatic charge from your body by touching a known earth ground. Alternatively, wear a discharging Wrist-strap device. (Be sure to remove it prior to applying power--this is an electric shock precaution.)

DEVICE UNDER

TEST

(READING SHOULD

NOT BE ABOVE

0.5mA)

LEAKAGE CURRENT

TESTER

EARTH

GROUND

TEST ALL

EXPOSED METER

SURFACES

ALSO TEST WITH

PLUG REVERSED

(USING AC ADAPTER

PLUG AS REQUIRED)

2-WIRE CORD

Precautions

1-2 Samsung Electronics

11. High voltage is maintained within specified limits by close-tolerance, safety-related components and adjustments. If the high voltage exceeds the specified limits, check each of the special components.

12. Design Alteration Warning : Never alter or add to the mechanical or electrical design of this unit. Example : Do not add auxiliary audio or video connectors. Such alterations might create a safety hazard. Also, any design changes or additions will void the manufacturer’s warranty.

13. Hot Chassis Warning : Some TV receiver chassis are electrically connected directly to one conductor of the AC power cord. If an isolation transformer is not used, these units may be safely serviced only if the AC power plug is inserted so that the chassis is connected to the ground side of the AC source.

To confirm that the AC power plug is inserted correctly, do the following : Using an AC voltmeter, measure the voltage between the chassis and a known earth ground. If the reading is greater than 1.0V, remove the AC power plug, reverse its polarity and reinsert. Re-measure the voltage between the chassis and ground.

14. Some TV chassis are designed to operate with 85 volts AC between chassis and ground, regardless of the AC plug polarity. These units can be safely serviced only if an isolation transformer inserted between the receiver and the power source.

15. Never defeat any of the B+ voltage interlocks. Do not apply AC power to the unit (or any of its assemblies) unless all solid-state heat sinks are correctly installed.

16. Always connect a test instrument’s ground lead to the instrument chassis ground before connecting the positive lead; always remove the instrument’s ground lead last.

17. Observe the original lead dress, especially near the following areas : Antenna wiring, sharp edges, and especially the AC and high voltage power supplies. Always inspect for pinched, outof-place, or frayed wiring. Do not change the spacing between components and the printed circuit board. Check the AC power cord for damage. Make sure that leads and components do not touch thermally hot parts.

18. Picture Tube Implosion Warning : The picture tube in this receiver employs “integral implosion” protection. To ensure continued implosion protection, make sure that the replacement picture tube is the same as the original.

19. Do not remove, install or handle the picture tube without first putting on shatterproof goggles equipped with side shields. Never handle the picture tube by its neck. Some “in-line” picture tubes are equipped with a permanently attached deflection yoke; do not try to remove such “permanently attached” yokes from the picture tube.

20. Product Safety Notice : Some electrical and mechanical parts have special safety-related characteristics which might not be obvious from visual inspection. These safety features and the protection they give might be lost if the replacement component differs from the original--even if the replacement is rated for higher voltage, wattage, etc.

Components that are critical for safety are indicated in the circuit diagram by shading, ( or ). Use replacement components that have the same ratings, especially for flame resistance and dielectric strength specifications. Areplacement part that does not have the same safety characteristics as the original might create shock, fire or other hazards.

Samsung Electronics 3-1

3. Software Upgrade and Installation

3-1 Flash Memory Writing process

How to input software after changing Boot software and replacing Flash Memory.

3-1-1 JPI Setting Manual

1) JPI exe Program : Setting ver R1.80 Make C:\STM\ST20R1.80 folder in C and copy exe file. Execute setup file in C:\STM\ST20R1.80 folder.

2) PC Setting

Execute vppi set in bin folder, opening C:\STM\ST20R1.80\bin folder Port type in vppi set up : Auto Detect -> EPP Access Mode : after altering Synchronous -> Interrupt, Click Apply and close “vppi set up”. Open Regedit exe in Windows (O) : regedit

HKEY_LOCAL_MACHINE double click -> SYSTEM double click -> CURRENT CONTROL SET double click -> SERVICES double click -> VxD double click vppi set click -> *Access Mode : 0x00000002(2)

*Port Type : 0x00000003(3)

◆ Following line should be added at Autoexec.bat of PC.

SET ST20ROOT=C:\STM\ST20R1.80 SET STVM_HOME=C:\STM\ST20R1.80 SET TOOLSET=C:\STM\ST20R1.80

3) Caution

◆ When Defaulting in vppi set up (in case of not altering)

Access Mode : 0x00000003(3)

◆ Port Type : 0x00000000(0)

◆ When inputting boot program as JPI, following items should be

omitted in C:\windows\system.ini file[386Enh].

device=C:\ST20SWC\tools\vwrun.386 device=C:\ST20SWC\tools\vb045st.386 device=C:\ST20SWC\tools\vb008st.386

* If copied by PPI, above items should be included.

Software Upgrade and Installation

3-2 Samsung Electronics

3-1-2 Boot Software Input Process (Same Process in Main Software Installing)

Œ Prepare PC and JPI, DSR 9400 as above figure. ´ Connect MAIN BOARD to JIG, JPI ADAPETER to JPI Port of MAIN PCB.

Then JP102(Jumper) Short of Main Board.

ˇ Approve a power source of POWER SUPPLY in the product set. ¨ Convert PC into MS-DOS MODE. ˆ Execute C:\amd-boot\flash file name (SETTING UP ST20 DCU TOOLSET 1.6.2 SETTING END) Ø After the power source of POWER SUPPLY OFF.

Then disassemble from JPI ADAPTER CONNECTER.

◆ SRF00902A (FTA) -> C:\amd-boot\flash boot_FTA_9400_1

◆ SRV10902A (EM VIA)-> C:\amd-boot\flash boot_VIACCESS_9400_1

“Message Check” Program Start Erased Block 65 OK! Erased Block 66 OK! Erased Block 67 OK! Erased Block 68 OK! Erased Block 69 OK! received 65 block entering fast mode programming sequence from C05e0000 to 7ffe0000 received 66 block entering fast mode programming sequence from C05f0000 to 7fff0000 received 67 block entering fast mode programming sequence from C05f8000 to 7fff8000 received 68 block entering fast mode programming sequence from C05fa000 to 7fffa000 received 69 block entering fast mode programming sequence from C05c0000 to 7fffc000 romtool : Operation Complete Test Mode

JPIadapter

LPT1

220V AC

DC 9V

Main PCB

DSR 9400

S M P S

JPI Port

Fig. 3-1

Software Upgrade and Installation

Samsung Electronics 3-3

3-1-3 MAIN Software Install Process

Œ Open DSR.TRM file while executing HYPERTERMINAL of PC.

Port : Select to COM 1 port currently used. Baudrate : 115200

´ As Vol-up key of Front PCB presses, POWER(PLUG) ON.

◆ SRF00902A : Samsung Brand FTA Model

Loader version x. x

◆ SRV10902A : Samsung Brand EM VIACCESS Model

Loader version x. x

ˇ Send a file at Download ROM image. ( PROTOCOL : 1K XMODEM ) ¨ Select Main Program (C:\main\DSR9400_2002_04_03_120_44D2.bin) by each kinds as selecting the File Send of

Transfer or Hyperterminal.

ˆ Check if the normal message appears.

COM1

220V AC

Main PCB

DSR 9400

S M P S

RS-232

Fig. 3-2

Software Upgrade and Installation

3-4 Samsung Electronics

MEMO

NO POWER (LED OFF)

Power switch and

power plug pin is

connected?

SMPS OK?

J301 (2, 5, 6, 7, 8, 9)

Check U901, U902

Connect switch and power Plug pin.

Yes

Check SMPS.

Front PCB ass'y is OK?

Yes

Check Front PCB ass'y.

U4(12, 13) signal?

: 27MHz CLK

Check X1.

Yes

R10 signal?

: 27MHz CLK

Check R10.

Yes

108MHz CLK is occurred

at R78, R79

Check U1

Yes

U4(8) signal? : 27MHz CLK

Check U4.

Yes

Check U808.

Samsung Electronics 4-1

4. Troubleshooting

Troubleshooting

4-2 Samsung Electronics

NO LOCKING

U305 (5) is High?

(5 Volts)

U305 (3) DC Voltage is

H : 17~19V , L : 12.5~14V?

Check U1.

Check LNB Power On/Off at Menu.

Yes

Check CHIC1, SMPS(11, 12).

U902 Input

voltage L809 : 5V,

U901 Input vloltage

BD804 : 3.3V

Yes

Check U301, U304.

U901 Data, Control

appear at R930 ~ R940

Check U901.

Yes

Troubleshooting

Samsung Electronics 4-3

NO SPDIF OUTPUT

L602 is 5V?

Check L602, SMPS.

Yes

Check U1.

Data waveform

occur at U603(20)

U603(5, 6, 7, 8)

Data, CLK?

Yes

Check U603.

Yes

Check J600.

Troubleshooting

4-4 Samsung Electronics

NO VIDEO (TV SCART)

U800(4) Video signal ?

L804 Video signal ?

Yes

Check U1.

U800(44) Signal ?

Check R817.

Check U800.

Yes

Troubleshooting

Samsung Electronics 4-5

NO VIDEO (VCR SCART)

U800(4) Video signal ?

L804 Video signal ?

Yes

Check U1.

U800(44) Signal ?

Check R824.

Check U800.

Yes

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