Page 1
(IC ブロック図) ......... CIRCUIT BOARDS (シート基板図) ..........TEST PROGRAM (テストプログラム) ........27/30 MIDI IMPLEMENTATION CHART 33/34 (MIDI インプリメンテーションチャート)..OVERALL CIRCUIT DIAGRAM (総回路図) PARTS LIST 001747 P-70: 20051201- オープンプライス Copyright (c) Yamaha Corporation. All rights reserved. PDF KM ’06.01 P-70S: 20051201- オープンプライス...
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.
P-70/P-70S DISASSEMBLY PROCEDURE (分解手順) 1. 下ケースAss'y(所要時間: 約12分) Lower Case Assembly (Time Required: about 12 min) 1-1. [S03]のネジ72本を外して、下ケースAss'yを 1-1 Remove the seventy two (72) screws marked [S03]. 外します。(Photo 1) The lower case assembly can then be removed. (Photo 1) Lower Case Assembly [S03] [S03] (下ケースAss'y)...
Page 8
P-70/P-70S 3. AMシート(所要時間: 約13分) AM Circuit Board (Time Required: about 13 min) 3-1 Remove the lower case assembly. (See procedure 1.) 3-1. 下ケースAss'yを外します。 (1項参照) 3-2 Remove the ten (10) screws marked [S01b] . The AM 3-2. [S01b]のネジ10本を外して、AMシートを外し ます。(Photo 2, 4) circuit board can then be removed. (Photo 2, 4) Upper Case Assembly...
Page 9
P-70/P-70S 6. スピーカ(所要時間: 約14分) Speaker (Time Required: about 14 min) 6-1 Remove the lower case assembly. (See procedure 1.) 6-1. 下ケースAss'yを外します。 (1項参照) 6-2 Remove the two (2) screws marked [U60]. The speaker 6-2. [U60]のネジ2本を外して、SPグリルAss'yを外 します。 (Photo 2, 7) grille assembly can then be removed. (Photo 2, 7) 6-3 Remove the four (4) screws marked [U40] .
Page 10
P-70/P-70S 8. PNシート(所要時間: 約15分) PN Circuit Board (Time Required: about 15 min) 8-1 Remove the top cover. (See procedure 1.) 8-1. 下ケースAss'yを外します。 (1項参照) 8-2 Remove the six (6) screws marked [S01h]. The PN 8-2. [S01h]のネジ6本を外して、PNシートを外し ます。(Photo 2, 10) circuit board can then be removed. (Photo 2, 10) Upper Case Assembly...
Page 11
P-70/P-70S Disassembling the Keyboard Assembly 9. GHL (GHS) 鍵盤Ass'yの分解 9-1 White key assembly and black key assembly 白鍵Ass'y、黒鍵Ass'y 9-1 Remove the four (4) screws marked [270A] fixing the 各オクターブ (C〜B) の白鍵Ass'yと黒鍵Ass'yを止 black and white key assembly for one octave (C—B). ...
Page 12
P-70/P-70S 9-5 Rubber Contact 接点ゴム 9-5 Remove the black and white key assembly for two 該当する接点ゴムの2オクターブ分の白鍵Ass'y/ octaves related to the subject rubber contact. The rubber 黒鍵Ass'yを外して、接点ゴムを外します。 contact can then be removed. (Fig. 4, Fig. 4-1) (図4、図4-1) Note that the rubber contact has a specific installation ※ ...
Page 13
P-70/P-70S 9-6 GHL88L Circuit Board GHL88Lシート 9-6 Remove the black and white key assembly (A1—B2). A-1〜B2までの白鍵Ass'y/黒鍵Ass'yを外します。 (See procedure 4-1) (4-1項参照) Remove the six (6) screws marked [260A]. The [260A]のネジ6本を外して、GHL88Lシートを外し GHL88L circuit board can then be removed. (Fig. 4) ...
Page 14
P-70/P-70S 9-9 Hammer (White Key), (Black Key) ハンマー (白鍵) 、 ( 黒鍵) 9-9 Remove the black and white key assembly for the 該当する白鍵Ass y/黒鍵Ass yを外します。 related keys. 鍵盤フレームを裏側にして、後方からハンマーを With the key frame placed upside down, push the ...
Page 15
P-70/P-70S 10. Assembling the Keyboard Assembly 10. GHL (GHS) 鍵盤Ass'yの組立 10-1 Hammer (White Key), (Black Key) 10-1 ハンマー (白鍵) 、 ( 黒鍵) After applying grease to the bearing section of the ハンマー軸部にグリス塗布後、後方からハンマー (白 hammer, bring the hammer (white key) (black key) ...
Page 16
P-70/P-70S 10-4 GHL88H Circuit Board 10-4 GHL88Hシート Tighten the five (5) screws marked [260C] to fix the GHL88Hシートを取り付け、[260C]のネジ5本で固 GHL88H circuit board. (Fig. 4) 定します。(図4) 10-5 Rubber Contact 10-5 接点ゴム Note that the rubber contact has s specific installation ...
Page 17
P-70/P-70S 10-7 White key assembly and black key assembly 10-7 白鍵Ass'y、黒鍵Ass'y After applying grease to the key guide, install the white キーガイドにグリス塗布後、白鍵Ass'y/黒鍵Ass'y key assembly/black key assembly. At this time, check を取り付けます。 to make sure that the key guide of the key frame and ...
P-70/P-70S LSI PIN DESCRIPTION ( 端子機能表) YMW767-VTZ (X6055A00) CPU (SWL01B) NAME FUNCTION NAME FUNCTION Ground Ground Input for TEST Power supply +3.3 V TESTN PLLBPN PLL bypass select External memory lower-byte enable / Port F LBN/LWRN/PF6 PLLV PLL Power supply +2.5 V...
Page 19
P-70/P-70S PD789022GB-A15-8E (XZ560100) CPU NAME FUNCTION NAME FUNCTION P32/INTP2/CPT2 Port 3/External interrupt input/Capture edge input Port 1 P31/INTP1 Port 3/External interrupt input P30/INTP0 P47/KR7 P22/RXD/SI0 Port 2/Asynchronous serial interface serial data input/Serial interface serial data input P46/KR6 P21/TXD/SO0 Port 2/Asynchronous serial interface serial data output/Serial interface serial data output...
Page 22
P-70/P-70S AM Circuit Board (AMシート) to PN-CN101 to HP-CN301 A’ to Speaker DC IN 12V Components side (部品側) A’ not installed (実装されていません) AM: 2NA-WF20660...
Page 23
P-70/P-70S AM Circuit Board ( シート) B’ Pattern side (パターン側) B’...
Page 26
P-70/P-70S DJACK Circuit Board (DJACKシート) MIDI IN PEDAL to DM-CN202 Components side (部品側) PN Circuit Board ( シート) to AM-CN101 to HP-CN301 FUNCTION DEMO/SONG GRAND PIANO/ SELECT VOICE STANDBY/ON MASTER VOLUME Components side (部品側) HP Circuit Board (HPシート) to AM-CN105 Components side (部品側)
P-70/P-70S TEST PROGRAM Preparation ・ Use an AC adaptor PA-5D. ・ Following items are required for testing. (Input impedance of measuring instrument is more than 1M ohm) - Level meter (with JIS-C Filter) - Frequency counter: Below decimal point 3 or more figures measurement is possible.
Page 28
P-70/P-70S Table 1 Test items Test function and judgment criteria Test item ROM version check To check the Master ROM version using C0-A2 keys. Press keys in the specified range and find the key where the sine wave sounds. Check the version by the scale of that key.
Page 29
P-70/P-70S Test function and judgment criteria Test item Output Level R check Check that the sine wave of 1kHz sounds at the level specified below (DAC input full bit -12 dB). (PAN = R) Connect a level meter (with JIS-C Filter) to the [PHONES] jack for measurement.
Page 37
DM OVERALL CIRCUIT DIAGRAM (DM P-70/P70S 回路図) (P-70/P-70S) RESET 64M ROM PROG/WAVE REGULATOR +3.3V REGULATOR +2.5V OP AMP to AM-CN103 28CC1-2000004794 DM OVERALL CIRCUIT DIAGRAM (DM 回路図) (P-70/P-70S) to GHL88M...
Page 38
P-70/P70S AM OVERALL CIRCUIT DIAGRAM (AM 回路図) (P-70/P-70S) POWER AMP to PN-CN101 to Speaker R107, R108, C105 and C106 are not installed.(未実装) OP AMP R207, R208, C205 and C206 are not installed.(未実装) to DM-CN401 to HP-CN301 REGULOTOR +5V DC IN 12V...
Page 39
PN, DJACK. HP OVERALL CIRCUIT DIAGRAM (PN、DJACK、HP P-70/P70S 回路図) (P-70/P-70S) MASTER VR DEMO/SONG GRAND PIANO/ SELECT VOICE STANDBY/ON 28CC1-2000004795 to AM-CN101 to DM-CN201 DJACK MIDI IN to AM-CN105 MIDI OUT to DM-CN202 C305 is not installed. (未実装) SUSUTAIN PEDAL 28CC1-2000004795 C204 is not installed.