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PREFACE

< YFB200G >

The service technician is required to read and follow the “Safety Precautions” and “Important Safety Notice” in this service manual.

Any unauthorized changes or modifications to this equipment will void the users authority to operate.

This device is using the P.C.Board which applies lead free solder.
Use lead free solder in servicing from the standpoint of antipollution for the global environment.
Notes:
  

・

 Lead free solder: Sn-Ag-Cu (tin, silver and copper) has a higher melting point (approx. 217°C) than standard solder. Typically the melting point

  ・ is 30~40 °C higher. When servicing, use a high temperature soldering iron with temperature limitation function and set it to 370 ± 10 °C.
  ・ Be precautious about lead free solder. Sn-Ag-Cu (tin, silver and copper) will tend to splash when heated too high (approx. 600°C or higher).
  ・ Use lead free solder for the P.C.Board (specified on it as “PbF”) which uses lead free solder. (When you unavoidably use lead solder, use lead
  ・ solder after removing lead free solder. Or be sure to heat the lead free solder until it melts completely, before applying lead solder.)
  ・ After soldering to double layered P.C.Boards, check the component side for excess solder which may flow onto the opposite side.

About the identification of the lead free solder P.C.Board.
  For the P.C.Board which applies lead free solder, the symbol as shown in the figure below is printed or stamped on the surface
  or the back of P.C.Board.

 

There are special components used in this equipment which are important for safety. These parts are marked by 7 in the schematic

  diagram, circuit board diagrams, exploded views and replacement parts list. It is essential that these critical parts should be replaced
  with manufacturer’s specified parts to prevent shock, fire, or other hazards. Do not modify the original design without permission of
  manufacturer.

This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more
of the following measures:
  ・Reorient or relocate the receiving antenna.
  ・Increase the separation between the equipment and receiver.
  ・Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
  ・Consult the dealer or an experienced radio/TV technician for help.

  

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  This service information is designed for experienced repair technicians only and is not designed for use by the general public.
  It dose not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
  Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service
  or repair the product or products dealt with in this service information by anyone else could result in serious injury or death.

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CONTENTS

< YFB200G >

1. Safety Precautions

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2. Specifications

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2. 1. Specifications
2. 2. Dimensions

3. The name of each part

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3. 1. Main body
3. 2. Control panel
3. 3. Connecting terminals
3. 4. Mounting accessories

4. OSD Menu Navigation

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5. Service Mode

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5. 1. Procedure of service mode entering and exiting
5. 2. Functions in Service Mode

6. A-P.C.Board replacement

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6. 1. Required equipments
6. 2. Connection preparations
6. 3. Setup procedure

7. Software update procedure

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7. 1. Required equipments
7. 2. Connection Preparations
7. 3. Update procedure

8. Schematic Diagram

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8. 1. Block diagram
8. 2. A-P.C.Board Schematic diagram (1/3 - 3/3)
8. 3. J-P.C.Board Schematic diagram 
8. 4. S-P.C.Board Schematic diagram 
8. 5. A-P.C.Board Circuit boards diagram
8. 6. J-P.C.Board / S-P.C.Board Circuit boards diagram

9. Exploded Views & Replacement Parts List

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9. 1. Parts Location
9. 2. Packing Parts
9. 3. Replacement Parts List

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SAFETY PRECAUTIONS

< YFB200G >

 Accuracy : 

≦

 2%

 Input resistance :

≧

 1 MΩ

 Input capacitance :

≦

 200 pF

 Frequency range :

15 Hz to 1 MHz

Table. 1

1. Prepare the measuring circuit as shown in Fig.1.
    Be sure to use a voltmeter having the performance described in Table 1.
2. Assemble the circuit as shown in Fig. 2. Plug the power cord in a power outlet.
3. Connect M1 to T1 according to Fig. 2 and measure the voltage.
4. Change the connection of M1 from T1 to T2 and measure the voltage again.
5. The voltmeter must read 0.375 V or lower in both of steps 3 and 4.  This means that the current must be 0.75mA
    or less.
6. If the reading is out of the above standard, the device must be repaired and rechecked before returning to the
    customer because of a possibility of an electric shock.

- For continued safety, no modification of any circuit must be attempted.
- Unplug the power cord from the power outlet before disassembling this device.
- Use correctly the supplied power cord and must ground it.
- It is advisable to use an isolation transformer in the AC power line before the service.
- Be careful not to touch the rotation part (cooling fan, etc.) of this device when you service with the upper
  case removed and the power supply turned ON.
- Observe the original lead dress during the service. If a short circuit is found, replace all the parts overheated
  or damaged by the short circuit.
- After the service, all the protective devices such as insulation barriers, insulation papers, shields, and isolation
  R-C combinations must be properly installed.
- After the service, check the leakage current to prevent the customer from getting an electric shock.

Performance

 Voltmeter
 (rms reading)

M1

M2

Rs

Rb

Cs

10 kΩ ±0.1%

V

Vb

(V)

0.022μF
±1.0%

to T1
or T2
in FIG.2

Rs:1500 Ω ±0.1%
Cs:0.22μF ±1.0%
Rb:500 Ω ±0.1%

Weighted leakage current = Vb / 500 (A)

M1

M2

T1

T2

Isolation transformer

to power outlet

Measuring
circuit (Fig.1)

Multi Window

Processor

connection

Fig. 1

Fig. 2

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SPECIFICATIONS

< YFB200G >

f

r Terminal

2 sets, high-density D-Sub 15 p (female)

0.7 V [p-p] 75 Ω (SYNC ON GREEN: 1.0 V [p-p] 75 Ω)

HD/SYNC

TTL high impedance, automatic positive/negative 
polarity compatible

VD

TTL high impedance, automatic positive/negative 
polarity compatible

(HD/SYNC and VD do not support 3 value SYNC.)

Y: 1.0 V [p-p] including synchronization signal, P

B

P

R

: 0.7 V [p-p] 75 Ω

Y: 1.0 V [p-p], C: 0.286 V [p-p] 75 Ω

1 set, Pin jack 1.0 V [p-p] 75 Ω

2 sets, HDMI 19 p, HDCP compatible, Deep Color compatible
Audio signal: Linear PCM (sampling frequency: 48 kHz/44.1 kHz/32 kHz)

1 set, 3-pin 3.5 mm detachable terminal block, for external control (RS-232C compliant)

3 sets, M3 stereo mini jack 0.5 V [rms], input impedance 22 kΩ or higher

1 set, M3 stereo mini jack (monitor output, stereo can be supported)
0 V [rms] to 2.0 V [rms] (variable), output impedance 2.2 kΩ or lower

1 set, DVI-D 24 p

1 set, RJ-45, for network connection, PJLink compatible, 10Base-T/100Base-TX

2 sets, RJ-45, for DIGITAL LINK connection (HDBaseT

TM

 compliant)

1 set, D-Sub 9 p, for external control (contact control)

*1  Only the <COMPUTER 1 IN> terminal can input Y/C signal using the optional D-SUB - S Video conversion cable (Model No.: ET-ADSV).

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