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Yamaha PSR-F50 Service Manual
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Yamaha PSR-F50 Service Manual

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SERVICE MANUAL
CONTENTS
SPECIFICATIONS ..................................................................... 3
PANEL LAYOUT ....................................................................... 3
CIRCUIT BOARD LAYOUT& WIRING ...................................... 4
DISASSEMBLY PROCEDURE ................................................ 5
CIRCUIT BOARDS ...................................................................11
TEST PROGRAM .................................................................... 17
PARTS LIST
BLOCK DIAGRAM
OVERALL CIRCUIT DIAGRAM
001894
HAMAMATSU, JAPAN
Copyright (c) Yamaha Corporation. All rights reserved. PDF
'13.07

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Summary of Contents for Yamaha PSR-F50

  • Page 1 PANEL LAYOUT ............... 3 CIRCUIT BOARD LAYOUT& WIRING ........4 DISASSEMBLY PROCEDURE ..........5 CIRCUIT BOARDS ..............11 TEST PROGRAM ..............17 PARTS LIST BLOCK DIAGRAM OVERALL CIRCUIT DIAGRAM 001894 HAMAMATSU, JAPAN Copyright (c) Yamaha Corporation. All rights reserved. PDF ’13.07...
  • Page 2 IMPORTANT NOTICE This manual has been provided for the use of authorized Yamaha Retailers and their service personnel. It has been assumed that basic service procedures inherent to the industry, and more specifically Yamaha Products, are already known and understood by the users, and have therefore not been restated.
  • Page 3 PSR-F50 ■ SPECIFICATIONS ■ PANEL LAYOUT...
  • Page 4 PSR-F50 ■ CIRCUIT BOARD LAYOUT & WIRING...
  • Page 5 PSR-F50 ■ DISASSEMBLY PROCEDURE Caution: Be sure to attach the removed filament tape just as it was before removal. Center Panel Assembly Release the two (2) hooks marked [A]. The center panel assembly can then be removed. (Fig.1) (Time required: About 2 minutes) Remove the seven (7) screws marked [70A] and three (3) screws marked [80A].
  • Page 6 PSR-F50 Circuit Boards Remove the following screws. (Time required: About 4 minutes) Each circuit board can then be removed. (Fig.2, Table.1) Remove the center panel assembly. (See procedure 1.) Fig.2 Table.1...
  • Page 7 PSR-F50 Side Panel Assembly L,R Speaker L, R (Time required: About 4 minutes) (Time required: About 5 minutes) Remove the center panel assembly. (See procedure 1.) Remove the center panel assembly. (See procedure 1.) Remove the four (4) screws marked [70B], the screw Remove the side panel assembly.
  • Page 8 PSR-F50 When removing, unfasten the two (2) hooks at the back Disassembling Keyboard Assembly of the black keys upward, and lift the white and black (Time required: About 13 minutes) keys while pulling them toward you a little. (Photo.1) Remove the center panel assembly. (See procedure 1.) 5-3-3 To remove the white key C6, remove the screw marked Remove the side panel assembly L, R.
  • Page 9 PSR-F50 Rubber Contact 5-5-2 Remove the twelve (12) screws marked [90A]. The 61L circuit board can then be removed. (Fig.5) 5-4-1 Remove the white and black keys corresponding to the 61H Circuit Board rubber contacts to be removed. (See Fig.4 and Procedure 5-3.) 5-6-1 Remove the white and black keys from C4 to C6.
  • Page 10 PSR-F50 How to Remove Spring Terminals Spring Terminal C and Spring Terminal D Spring Terminal A and Spring Terminal B (Time required: About 1 minute each) (Time required: About 4 minutes each) 6-2-1 Remove the battery cover assembly. (See procedure 6-1-5.) 6-1-1 Remove the center panel assembly.

  • Page 11: Table Of Contents

    PSR-F50 ■ CIRCUIT BOARDS DM Circuit Board (YF155D0) ..................13 ● AM Circuit Board (YF156C0) ..................11 ● PN Circuit Board (YF156C0) ..................12 ● 7SEG Circuit Board (YF156C0) .................. 12 ● 61H Circuit Board (XT701C0) ..................14 ● 61L Circuit Board (YE761A0) ..................15 ●...

  • Page 12: Pn Circuit Board (Yf156C0)

    PSR-F50 PN Circuit Board ● Component Side ● 7SEG Circuit Board Component Side 2NA-ZF28700 2      ...

  • Page 13: Dm Circuit Board (Yf155D0)

    PSR-F50 DM Circuit Board ● Component Side Pattern Side 2NA-ZF28690 1      ...

  • Page 14: Circuit Board (Xt701C0)

    PSR-F50 61H Circuit Board ● Component Side 2NAK8-ZF61670 1      ...

  • Page 15: Circuit Board (Ye761A0)

    PSR-F50 61L Circuit Board ● Component Side 2NAK8-ZD49640      ...
  • Page 16 PSR-F50 ■ DM Circuit Board Test Method The DM Circuit Board is provided with test points for service check purposes. Check the test points on the DM Circuit Board if the following symptoms appear. Symptoms and check items No LED display with Power SW ON -- > Check items 1 to 5 sequentially...
  • Page 17 PSR-F50 ■ TEST PROGRAM * If the test number 60 “Factory Set” is executed, the data already set will be lost. Preparations 1) Use an AC adaptor PA-3C or PA-130A. 2) Measuring device: Frequency counter, which can detect thousandth value or more, Level meter (with JIS-C filter), Oscilloscope * Input impedance of the measuring device should be 1 MΩ...
  • Page 18 PSR-F50 Test program list (dBu=dBm) Auto TEST Test descriptions, Judging Criteria LCD display mode Displays version of the ROM. “∗.∗∗”                                                                   ∗.∗∗ : Version Checks the ROM connected to the CPU bus. Confi rm that “PAS” is displayed on the 7-segment LED.
  • Page 19 PSR-F50...
  • Page 20 PARTS LIST CONTENTS OVERALL ASSEMBLY ..............2 KEYBOARD ASSEMBLY（16NS） ..........4 ELECTRICAL PARTS ..............5 WARNING Components having special characteristics are marked and must be replaced with parts having specification equal to those originally installed. The numbers “QTY” show quantities for each unit. The parts with “--”...
  • Page 21 PSR-F50 ■ OVERALL ASSEMBLY...
  • Page 22 PSR-F50 PART NO. DESCRIPTION REMARKS 部 品 名 REF NO. QTY RANK OVERALL ASSEMBLY 総 組 立 PSR-F50 FINAL ASSEMBLY PK PSR-F50 総 組 立 (ZF74220) CENTER PANEL ASSEMBLY PK PSR-F50 (ZF61320) Ｃ パ ネ ル SIDE PANEL R ASSEMBLY PK PSR-F50 右...
  • Page 23 PSR-F50 ■ KEYBOARD ASSEMBLY（16NS） PART NO. DESCRIPTION 部 品 名 REMARKS REF NO. QTY RANK KEYBOARD ASSEMBLY ｙ PSR-F50 鍵 盤 Ａ ｓ ｓ 16NS 16N C61 D1M １ ６ Ｎ Ｓ (ZD49620) ZE369800 WHITE KEY 16NS CEGB 白 鍵...
  • Page 24 PSR-F50 DM,AM,PN,7SEG ■ ELECTRICAL PARTS PART NO. DESCRIPTION REMARKS 部 品 名 REF NO. QTY RANK ELECTRICAL PARTS 電 気 部 品 PSR-F50 ZF836000 CIRCUIT BOARD Ｄ Ｍ シ ー ト (ZF28690)(YF155D0) ZF836100 CIRCUIT BOARD (ZF28700)(YF156C0) Ａ Ｍ シ ー...
  • Page 25 < Page 1 > PSR-F50 PSR-F50 BLOCK DIAGRAM Keyboard 61KEY (16N-S) NON TOUCH RESPONSE SW MATRIX SW200 ( SW 21 ( VOLUME ± is included.) 7SEG CN1(13P) CN1(11P) SW201-208,211-218,221-225 CN201(16P) CN202(13P) CN201(11P) CN301(16P) /PSW +3.3L TR301-303 DIGIT[0-2] 7seg_e0-2 Driver SPEAKERS +3.3D...
  • Page 26 < Page 2 > PSR-F50 PSR-F50 OVERALL CIRCUIT DIAGRAM 1/3 (DM) REGULATOR +3.3V REGULATOR +5V REGULATOR +3.3V to AM-CN103 <Page3:P11> OP AMP VOLTAGE DETECTOR <to I10> CPU SWLL to 61L-CN1 <Page4:M10> FLASH ROM 16M to PN-CN201 <Page3:P5> D-FF to 61H-CN1 <Page4:M4>...
  • Page 27 < Page 3 > PSR-F50 PSR-F50 OVERALL CIRCUIT DIAGRAM 2/3 (AM, PN, 7SEG) 7SEG to DM-CN301 <Page2:B9> 28CC1-2001119321 3 28CC1-2001119321 3 POWER AMP 2.5W 2CH to DM-CN1 <Page2:N4> 28CC1-2001119321 3 PSR-F50 PSR-F50...
  • Page 28 < Page 4 > PSR-F50 PSR-F50 OVERALL CIRCUIT DIAGRAM 3/3 (61H, 61L) to DM-CN201 <Page2:N11> 28CC1-2001113060 to DM-CN202 <Page2:N7> 28CC1-2001113059 PSR-F50 PSR-F50...
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