Yamaha PSR-E373 User manual

370
SERVICE MANUAL
PSR-E373 YPT-370
PK 001996 -A0
2020.09 © 2020 Yamaha Corporation.
n CONTENTS
SPECIFICATIONS................................................................................... 3
PANEL LAYOUT...................................................................................... 5
CIRCUIT BOARD LAYOUT & WIRING.................................................... 7
BLOCK DIAGRAM................................................................................... 8
DISASSEMBLY PROCEDURE................................................................ 9
CIRCUIT BOARDS................................................................................ 16
DMLCD Circuit Board Check Method.................................................... 22
TEST PROGRAM.................................................................................. 23
BACKUP................................................................................................ 30
INITIALIZATION..................................................................................... 31
SYSTEM BOOTING FLOW CHART...................................................... 32
PARTS LIST
OVERALL CIRCUIT DIAGRAM

PSR-E373/YPT-370
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 specically Yamaha Products, are already known and understood by the users,
and have therefore not been restated.
WARNING :Failure to follow appropriate service and safety procedures when servicing this product may result in personal injury,
destruction of expensive components and failure of the product to perform as specied. For these reasons, we advise
all Yamaha product owners that all service required should be performed by an authorized Yamaha Retailer or the
appointed service representative.
IMPORTANT :This presentation or sale of this manual to any individual or rm does not constitute authorization certication,
recognition of any applicable technical capabilities, or establish a principal-agent relationship of any form.
The data provided is believed to be accurate and applicable to the unit(s) indicated on the cover. The research engineering, and service
departments of Yamaha are continually striving to improve Yamaha products. Modications are, therefore, inevitable and changesin
specication are subject to change without notice or obligation to retrot. Should any discrepancy appear to exist, please contact the
distributor’s Service Division.
WARNING :Static discharges can destroy expensive components. Discharge any static electricity your body may have accumulated
by grounding yourself tothe ground bus in the unit (heavy gauge black wires connect tothis bus.)
IMPORTANT : Turn the unit OFF during disassembly and parts replacement. Recheck all work before you apply power tothe unit.
WARNING
Components having special characteristics are marked and must be replaced with parts having specication equal to those
originally installed.
Be sure to
perform it
Saving and backing up your data
Some data items are automatically saved as backup data in the internal memory even if you turn the power off. Saved
data may be lost due to malfunction or incorrect operation. Save important data to external device such as a computer.
SAVING DATA
2.SERVICE MANUAL
1
.
I
M
P
O
R
T
A
N
T
N
O
T
I
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E

PSR-E373/YPT-370
3
SPECIFICATIONS
Product Name Digital Keyboard
Size/Weight
Dimensions (W x D x H) 945 mm x 369 mm x 118 mm
(37-3/16” x 14-1/2” x 4-5/8”)
Weight 4.6 kg (10 lb 2 oz)
(not including batteries)
Control Interface
Keyboard 16syeKforebmuN
dexiF,draH,muideM,tfoSesnopseRhcuoT
Display
DCLepyT
seYthgilkcaB
hsilgnEegaugnaL
hsilgnEegaugnaLlenaP
Voices
Tone GenerationTone Generation
Technology AWM Stereo Sampling
84).xam(ynohpyloP
Preset Number of Voices
622
(241 Panel Voices + 22 Drum/SFX kits + 20 Arpeggio +
339 XGlite Voices)
etilGX/MGytilibitapmoC
Effects
Types
sepyt83PSD
sepyt21breveR
sepyt5surohC
sepyt6QEretsaM
Functions
seYlauD
seYtilpS
seYniatsuS
sepyt62ynomraH
sepyt051oiggeprA
seYrosserppuSydoleM
)secioVetiLnoitalucitrArepuS11(seYnoitalucitrA
Accompaniment
Styles
Preset
502selytSforebmuN
regnifitluM,drohCtramSgniregniF
Style Control ACMP ON/OFF, SYNC START, START/STOP, INTRO/ENDING/rit.,
MAIN/AUTO FILL
01selytSlanretxE
Other Features
071esabataDcisuM
One Touch Setting
(OTS) Yes
)FFS(tamroFeliFelytSytilibitapmoC
Songs (MIDI)
Preset Number of Preset Songs154
(including Touch Tutor: 10, Chord Study: 12, Chord Progression: 30)
Recording
5sgnoSforebmuN
2skcarTforebmuN
seton000,01.xorppAyticapaCataD
Format 1&0stamroFFMSkcabyalP
tamroFeliFlanigirOgnidroceR
Functions
Lesson
KEYS TO SUCCESS, Lesson 1–3 (Listening, Timing, Waiting),
Phrase Repeat, A-B Repeat, Chord Dictionary, Touch Tutor,
Chord Study, Chord Progression
oerets,tib61,zHk1.44)TSOHOTBSU(oiduABSU
Registration
Memory 9snottuBforebmuN
Overall Controls
seYemonorteM
082–11egnaRopmeT
21+ot0,0ot21-esopsnarT
)stnemercnizH2.0.xorppa(zH0.354–0.044–0.724gninuT
seYouD
)nottuBdnarGelbatroP(seYnottuBONAIPsuoenallecsiM
Storage and
Connectivity
BM4.1.xorppAyromeMlanretnIegarotS
Connectivity
V21NICD
Headphones/Output Standard stereo phone jack (PHONES/OUTPUT)
seYladePniatsuS
)kcajinimoeretS(seYNIXUA
seYTSOHOTBSU
Sound System W5.2+W5.2sreifilpmA
2xmc21srekaepS
n

PSR-E373/YPT-370
4
* The contents of this manual apply to the latest specications as of the publishing date. To obtain the latest manual, access the Yamaha
website then download the manual le. Since specications, equipment or separately sold accessories may not be the same in every locale,
please check with your Yamaha dealer.
Power Supply
Power Supply
AC Adaptor
Users within U.S or Europe: PA-130 or an equivalent recommended
by Yamaha
Others: PA-3C,PA-130 or an equivalent recommended by Yamaha
Batteries Six 1.5 V “AA” size alkaline (LR6), manganese (R6) or
six 1.2 V “AA” size Ni-MH rechargeable batteries (HR6)
)rotpadaCA031-APgnisunehW(W5noitpmusnoCrewoP
)tesebnacemiT(seYffOrewoPotuA
Included Accessories
•Music rest
•Owner’s Manual
•AC adaptor *1 (PA-130 or an equivalent recommended by Yamaha)
•Online Member Product Registration
*1: May not be included depending on your particular area. Please check
with your Yamaha dealer.
Separately Sold Accessories
(May not be available depending on your area.)
•AC adaptor:
Users within U.S or Europe: PA-130 or an equivalent recommended by
Yamaha
Others: PA-3C, PA-130 or an equivalent recommended by Yamaha
•Keyboard stand: L-2C
•Headphones: HPH-50/HPH-100/HPH-150
•Footswitch: FC4A/FC5

PSR-E373/YPT-370
5
PANEL LAYOUT
Front Panel
6C5C4C3C2C1C
Song ListStyle List Display Voice List
Music
Database List
•The illustrations and displays as shown in this manual are based on the PSR-E373.
NOTE
❶
❸
❷
❹
❻
❺❼
❽
❾
❿⓫ ⓬ ⓭ ⓮ ⓯
⓰
⓱
⓲
⓳
⓴ 󱢾 󱢿 󱣀 󱣁
󱣂
󱣃
󱣄
󱣅
󱣆
n

PSR-E373/YPT-370
6
[ ] (Standby/On) switch
[MASTER VOLUME] dial
[DEMO] button
[METRONOME] button
[TEMPO/TAP] button
PART
[L] button
[R] button
[REC TRACK 2] button
[REC TRACK 1] button
[KEYS TO SUCCESS] button
[PHRASE REPEAT] button
[1 LISTENING 2 TIMING 3 WAITING] button
[A-B REPEAT] button
[REW] button
[FF] button
[PAUSE] button
[ACMP ON/OFF] button
[INTRO/ENDING/rit.] button
[MAIN/AUTO FILL] button
[SYNC START] button
[START/STOP] button
[REC] button
[VOICE] button
[SONG] button
[STYLE] button
Number buttons [0]–[9], [+/YES], [-/NO]
[PORTABLE GRAND] button
[DSP] button
[ARTICULATION] button
[REGIST MEMORY] button
[FUNCTION] button
[MUSIC DATABASE] button
[DUAL] button
[SPLIT] button
[HARMONY/ARPEGGIO] button
Drum illustrations for the Drum Kit
Each of these indicates the drum or percussion instrument
assigned to the corresponding key for “Standard Kit 1.”
[SUSTAIN] jack
[PHONES/OUTPUT] jack
[AUX IN] jack
[USB TO HOST] terminal*
DC IN jack
In the Lesson mode
In the Recording mode
In the Song mode
In the Style mode
Rear Panel
❶
❷
❸
❹
❺
❻
❻
❼
❽
❾
❿
⓫
⓬
⓭
❿
⓫
⓬
⓭
⓮
⓯
⓰
⓱
⓲
⓳
⓴
󱢾
󱢿
󱣀
󱣁
󱣂
󱣃
󱣄
󱣅
󱣆
󱣇
󱣈
󱣉
󱣊
󱣋
󱣇 󱣈 󱣉󱣊
󱣋

PSR-E373/YPT-370
7
CIRCUIT BOARD LAYOUT & WIRING
DMLCD
PNL
MVR
PNR
811 56 12 7
61L-MK 61H-MK
DC-IN
2
4 13
1 23
WH050
WH040
WH030
WH020
WH010
500
500
350
250
230
220
210
(ZW76710)
(ZA17230)
(ZA18010)
(ZA18500)
(ZA17370)
(ZW81430)
(ZW81430)
(WE14140)
(VDM2390)
(ZW81320)
or
(ZZ74010)
(ZW81310)
or
(ZZ74000)
(ZW81300)
or
(ZZ73990)
DMLCD - CN302
MVR(PNL) - CN301
DMLCD - CN301
DMLCD - CN801
DC-IN(PNL) - CN102
PNR - CN202
PNL - CN107
DMLCD - CN303
PNL - CN103
DMLCD - CN501
DMLCD - CN502
15P L=100
3P L=100
8P L=50
11P L=75
4P L=50
2P L=165
2P L=165
2P L=70
3P L=240
7P L=550
5P L=620
PNR - CN201
PNL - CN105
PNL - CN106
PNL - CN104
PNL - CN101
61L-MK - CN05
61H-MK - CN02
SP1
SP1
BL
BATT
MK13
MK12
MK11 61H-MK - CN01 DMLCD - CN503 12P L=550*1
*1
*1
*2
*2
*2
*2
*3
*3
*3
*3
*3
*4
*4
*4
*5
*6
*7
*7
*8
*8
*8
*8
*8
*4
*4
*9
*4
*4
*4
*8
*4
*4
*4
*8
*1
*1
*4*1
*1
*1
*1
*1
*3
*1
*1
*1
*3
No.
910
UPPER CASE ASSEMBLY
LOWER CASE ASSEMBLY
SPEAKER (L) SPEAKER (R)
Destination RemarksUnit Name Location Parts No.
BACK-LIGHT ASSEMBLY
BATTERY TERMINAL (+/-)
Connection Method
*1: Installation
*2: Manual soldering
*3: Dip soldering
Connection Direction
Connector
Assembly
Table Wiring assemblies list
PNL and PNR
CIRCUIT BOARD
LOWER CASE
ASSEMBLY
UPPER CASE
ASSEMBLY SPEAKER R
SPEAKER L
*4: Edge mark is adjusted to Pin 1 mark ( mark).
*5: Red wire is connected to (+) terminal. Black wire is
connected to (-) terminal.
*6: Eage mark is adjusted to + mark.
*7: Red wire is connected to (+) terminal. White wire is
connected to (-) terminal.
*8: Connected
*9: Red wire is adjusted to Pin 1 mark ( mark).
上ケース Assʼy
下ケース Assʼy
スピーカー（L） スピーカー（R）
配線先
表 結線リスト
備考ユニット名 ロケーション 部品番号 束線名
下ケースAssʼy
PNLシート、
PNRシート
上ケースAssʼy スピーカ右
スピーカ左
バックライトAssʼy
電池端子(+/-)
接続方法
*1:差込み
*2:手半田
*3:ディップ
接続方向
*4:エッジマークが1ピン側(△)
*5:赤色線材が(+)端子、黒色線材が(‒)端子
*6:エッジマークが+側
*7:赤色線材が(+)端子、白色線材が(‒)端子
*8:接続済
*9:赤色線材が1ピン側(△)
* The parts with “( )” in “Part No.” are not available as spare parts.
Caution:
▪ Be sure to attach the removed filament tape just as it was before removal.
n

PSR-E373/YPT-370
8
BLOCK DIAGRAM
DMLCD
LCD
PNR (PN 2/4)
PNL (PN 1/4)
MK
DC-IN
(PN 4/4)
MVR
(PN 3/4)
CPU
SWX03S
RESONATOR QUARTZ
16.9344MHz
F Tolerance±50PPM
SDO1,SYSCLK BCLK,WCLK
RESONATOR QUARTZ
48MHz
F Tolerance±50PPM
N[11-16],N[21-26]
ADC24bit
PCM1803A
AUXIN-IN
PHONES
(Prog/WAV/
Backup)
SERIAL
NOR
512Mbit
*1
SDRAM
256Mbit
D.AMP
YDA176
FUNC_DP, FUNC_DM VBUS, PULLUP_ENB
LC
Filter
DAC 24bit
AK4430
+3.3D +5A
AUX IN
AUXIN-IN
RC Filter
/HP-MUTE
HP-IN
SDI,SYSCLK
BCLK,WCLK
SDO0,SYSCLK BCLK,WCLK
/DAMP-MUTE
+B
MVR
DECORDER
74LV138A
DECORDER
74LV138A
61KEY (16NS)
TOUCHRESPONSE
To Host
Full speed
SUSTAIN GP_IN7
GP_INOUT24-31
MA0-12
MD0-15
WEN,RCLK
LDQM,UDQM,
RASN,CASN,
CS2N
GP_INOUT0-7
RS,ENB
SDI,SDO0,SDO1
SYSCK
BCLK,WCLK
RESN
KYB01-04
KYN11-16
KYN21-26
/PSWI
PSWO
AN0
HeartBeat
GP_INOUT35
GP_OUT1
/MUTE GP_INOUT34
GP_INOUT32/DAMP-MUTE
/DETECT-CHECK GP_INOUT33
+HP
+HP
CN503
(12P)
CN501
(7P)
CN502
(5P)
/PSWI PSWO
CN1
(12P)
CN2
(5P)
CN5
(7P)
PVDD
+5A
+5A
+3.3D
GP_OUT5
/ADC_IC
FUNC_DP FUNC_DM VBUS PULLUP_ENB
MUTE
Circuit
+3.3A
AN1
/HP-MUTE
XI
XO
UCLK_I
UCLK_O
+3.3D
SUSTAIN
Battery Monitor
+B
STANDBY/ON
*More than 400ms
/PSWI PSWO +B MVR
+3.3D
“AA”size,LR6 or equivalent batteries
+
-
Battery 1.5×6
SUSTAIN
PA[0-7]
PB[0-2]
RESET
+2.9V 54.8ms
+5D
PA[0-7] PB[0-2] PA[0-2] PB[3-7]
PA[0-2]
PB[3-7]
AC adaptor
PA-130B or equivalent
DC-IN
+
-
MASTER VOLUME
B 10K
BACKLIGHT LED:1PC(WHITE)
LCD
DISPLAY
PA[0-7]
RS,ENB
+5D
+5D
COM[1-16] SEG[1-40]
SPR+ SPR- SPL+ SPL-
SPR+ SPR-
Lch
+
-
SPEAKER
Sustain
Rch
+
-
SW MATRIX
( SW24 PCS )
SW MATRIX
( SW14 PCS )
SPEAKER
*1 correspond to 1Gbit
SPL+ SPL-
SPL+ SPL-
SPR+ SPR-
LCD
DRIVER
Error
Detection
HP-IN
/MUTE
/DETECT
HeartBeat
/DAMP-MUTE
/DETECT-CHECK /HP-MUTE
IO00-IO03
CS0N, CLK0
WRH
WRL
WRB
/RES
CS52WRN CS53WRN GP_OUT7 CS51WRN
+3.3D
+B
+5D
+3.3A
+3.3V
REGULATOR
+5A
+3.3D +5V
DC/DC
Ripple Filter
PVDD
+HP
+5L
Internal Clock : 135.4752MHz Master Clock : 67.7376MHz
(TYPE-B)
(stereo mini)
ADC/DAC/D.AMP
Audio Format:I2S 24bit 44.1kHz
+3.3D +3.3D
B[09-13]
B[01-08]
B[07-11]
B[01-07]
N[11-16],
N[21-26]
KYB[01-04]
6 /12cm 6 /12cm
CN303 (2P)
CN201 (15P)
CN202
(2P)
CN302 (15P)
CN301 (8P)
CN106 (8P)
CN107
(2P)
CN104 (11P)
CN105
(3P)
CN301
(3P)
CN801 (11P)
CN103 (3P)
CN102
(4P)
CN101
(4P)
CN401
JK701 JK201
JK201
VR301
JK101
FZ101
TR103
TR102
SW101
IC001
n

PSR-E373/YPT-370
9
DISASSEMBLY PROCEDURE
Caution:
▪ Be sure to attach the removed filament tape just as it was before removal.
Lower Case Assembly (Time required: About 3 minutes)
1. Remove the 5 screws marked [120] and the 9 screws marked [100]. The lower case assembly can then be removed. (Fig.1)
*When installing the lower case assembly, first tighten the screw marked [100A] and then the remaining screws. (Fig.1)
[100]
[100]
[100]
[120]
[100A]
[100]
[A]
[A]
[A]
[A]
Bottom view
Top view SP GRILLE ASSEMBLY
BATTERY COVER ASSEMBLY
SP GRILLE ASSEMBLY
VOLUME KNOB
底面図
上面図 SPグリルAssʼy
電池蓋Assʼy
SPグリルAssʼy
ボリュームツマミ
Fig.1
n
1.

PSR-E373/YPT-370
10
DMLCD Circuit Board (Time required: About 6 minutes)
1. Remove the lower case assembly. (See procedure 1)
2. Remove the 12 screws [380A]. The DMLCD circuit board can then be removed. (Fig.2)
*When installing the DMLCD circuit board, tighten the screws 1 through 2 in numerical order. (Fig.2)
*After replacing the DMLCD circuit board, execute "Factory Reset" in the Test program.
[380A]
[380A] [380A]
[380A]
[380B] x2
[380C]
[370]
[370]
1
2
[380E] [380E]
[380E][380E]
[380D] [380D]
[380D] [380D]
DC-IN
PNRDMLCDPNL
MVR
Bottom view底面図
Fig.2
LCD (Time required: About 7 minutes)
1. Remove the lower case assembly. (See procedure 1)
2. Remove the DMLCD circuit board. (See procedure 2)
3. Remove the back light assembly. (Fig.3)
4. Remove the rubber connector. (Fig.3)
5. Remove the LCD display. (Fig.3)
*Avoid touching the conductive part of the rubber connector as much as possible. Should foreign matter or dirt adhere,
remove such contamination using adhesive tape or the like. Do not wipe off using solvents such as benzene or alcohol.
(Fig.3)
DMLCD
LCD display
BACK LIGHT ASSEMBLY
RUBBER CONNECTOR
液晶ディスプレイ
バックライトAss'y
ゴムコネクター
Fig.3
2.
3.