Yamaha Portatone PSR-540 User manual

HAMAMATSU,JAPAN
1.45K-536 I Printed in Japan’99.06
CONTENTS
SPECIFICATIONS ......................................................................................3
PANEL LAYOUT .......................................................................................4
CIRCUIT BOARD LAYOUT .......................................................................5
BLOCK DIAGRAM .................................................................................... 6
DISASSEMBLY PROCEDURE .................................................................7
LSI PIN DESCRIPTION ............................................................................9
IC BLOCK DIAGRAM............................................................................. 11
CIRCUIT BOARDS ..................................................................................12
TEST PROGRAM& INITIALIZE...............................................................16
MIDI IMPLEMENTATION CHART............................................................18
PARTS LIST
OVERALL CIRCUIT DIAGRAM
SERVICE MANUAL
PK 001629

PSR-540
6
28CA1-8813687

PSR540
9
HG73C205AFD (XU947C00) SWX00B TONE GENERATOR
PIN
NO. NAME I/O FUNCTION PIN NO. NAME I/O FUNCTION
1 ICN I Initial clear 85 CMA3 O Program address bus
2 RFCLKI I PLL Clock 86 CMA8 O Program address bus
3 TM2 I PLL Control 87 CMA2 O Program address bus
4 AVDD_PLL Power supply 88 CRD O read signal
5 AVSS_PLL Ground 89 CMA1 O Program address bus
6 MODE0 I SWX dual mode 90 CUB O high byte effective signal
7 VCC7 Power supply 91 VCC91 Power supply
8 GND8 Ground 92 GHND92 Ground
9 XIN I crystal oscillator 93 CS1 O CS signal
10 XOUT O crystal oscillator 94 CMA0 O Program address bus
11 MODE1 I SWX separate mode 95 CLB O low byte effective signal
12 TEST0 I TEST pin 96 CMA12 O Program address bus
13 TESTON I TEST pin 97 CMA11 O Program address bus
14 AN0-P40 I A/Dconverter 98 CMA10 O Program address bus
15 AN1-P41 I A/Dconverter 99 CMA9 O Program address bus
16 AN2-P42 I A/D converter 100 GND100 Ground
17 AN3-P43 I A/D converter 101 CWE O write signal
18 AVDD_AN Power supply 102 CMA16 O Program address bus
19 AVSS_AN Ground 103 CMA15 O Program address bus
20 TXD0 O for MIDI or TO-HOST 104 CMA14 O Program address bus
21 TXD1 O forMIDI 105 CMA13 O Program address bus
22 EXCLK I Crystal oscillator 106 CMD8 I/O Program memory Data bus
23 SMD11 I/O Wave memory data bus 107 CMD7 I/O Program memory Data bus
24 SMD4 I/O Wave memory data bus 108 CMD9 I/O Program memory Data bus
25 SMD3 I/O Wave memory data bus 109 CMD6 I/O Program memory Data bus
26 SMD12 I/O Wave memory data bus 110 CMD10 I/O Program memory Data bus
27 SMD10 I/O Wave memory data bus 111 CMD5 I/O Program memory Data bus
28 SMD5 I/O Wave memory data bus 112 CMD11 I/O Program memory Data bus
29 SMD2 I/O Wave memory data bus 113 CMD4 I/O Program memory Data bus
30 SMD13 I/O Wave memory data bus 114 CMD12 I/O Program memory Data bus
31 SMD9 I/O Wave memory data bus 115 CMD3 I/O Program memory Data bus
32 SMD6 I/O Wave memory data bus 116 CMD13 I/O Program memory Data bus
33 SMD1 I/O Wave memory data bus 117 CMD2 I/O Program memory Data bus
34 SMD14 I/O Wave memory data bus 118 CMD14 I/O Program memory Data bus
35 VCC35 Power supply 119 VCC119 Power supply
36 GND36 Ground 120 GND115 Ground
37 SMD8 I/O Wave memory data bus 121 CMD1 I/O Program memory Data bus
38 SMD7 I/O Wave memory data bus 122 CMD15 I/O Program memory Data bus
39 SMD0 I/O Wave memory data bus 123 CMD0 I/O Program memory Data bus
40 SMD15 I/O Wave memory data bus 124 CMA21 O Program address bus
41 SOE O read signal 125 PDT15 I/O SWX access data bus
42 SWE O write signal 126 PDT14 I/O SWX access data bus
43 SRAS O RAS signal 127 PDT13 I/O SWX access data bus
44 SCAS O CAS signal 128 PDT12 I/O SWX access data bus
45 REFRESH O REFRESH signal 129 PDT11 I/O SWX access data bus
46 CS0 O CS signal 130 PDT10 I/O SWX access data bus
47 SMA0 O Memory address bus 131 PDT9 I/O SWX access data bus
48 SMA16 O Memory address bus 132 PDT8 I/O SWX access data bus
49 VCC49 Power supply 133 VCC133 Power supply
50 GND50 Ground 134 GND134 Ground
51 SMA1 O Memory address bus 135 PDT7 I/O SWX access data bus
52 SMA15 O Memory address bus 136 PDT6 I/O SWX access data bus
53 SMA2 O Memory address bus 137 PDT5 I/O SWX access data bus
54 SMA14 O Memory address bus 138 PDT4 I/O SWX access data bus
55 SMA3 O Memory address bus 139 PDT3 I/O SWX access data bus
56 SMA13 O Memory address bus 140 PDT2 I/O SWX access data bus
57 SMA4 O Memory address bus 141 PDT1 I/O SWX access data bus
58 SMA12 O Memory address bus 142 PDT0 I/O SWX access data bus
59 SMA5 O Memory address bus 143 VCA143 Power supply
60 GND60 Ground 144 GND144 Ground
61 VCC61 Power supply 145 PAD2 I SWX access address bus
62 SMA11 O Memory address bus 146 PAD1 I SWX access address bus
63 SMA6 O Memory address bus 147 PAD0 I SWX access address bus
64 SMA10 O Memory address bus 148 VCC148 Power supply
65 SMA7 O Memory address bus 149 GND149 Ground
66 SMA9 O Memory address bus 150 PCS I Chip select
67 SMA17 O Memory address bus 151 PWR I write enable
68 SMA8 O Memory address bus 152 PRD I read enable
69 SMA18 O Memory address bus 153 RXD0 I for Midi or TO-HOST
70 SMA19 O Memory address bus 154 RXD1 I for Midi or Key scan
71 SMA20 O Memory address bus 155 SCLKI I EXT Clock
72 SMA21 O Memory address bus 156 ADIN I A/D converter
73 SMA22 O Memory address bus 157 ADLR O A/D converter LR clock
74 SMA23 O Memory address bus 158 DO0 O DAC
75 CMA20 O Program address bus 159 DO1 O DAC
76 CMA19 O Program address bus 160 SYSCLK O 1/2 clock
77 VCC77 Power supply 161 VCC161 Power supply
78 GND78 O Ground 162 GND162 Ground
79 CMA18 O Program address bus 163 WCLK O for DAC LR clock
80 CMA17 O Program address bus 164 QCLK O 1/12clock
81 CMA5 O Program address bus 165 BCLK O IIS-DAC clock
82 CMA6 O Program address bus 166 SYI I Synch signal
83 CMA4 O Program address bus 167 IRQ0 I Interruptrequest
84 CMA7 O Program address bus 168 NMI I Interrupt request
(DM IC200)

PSR540
10
HD63266F (XI939A00) FDC (Floppy Disk Controller)
PIN
NO. NAME I/O FUNCTION PIN NO. NAME I/O FUNCTION
1 8"//5" I Data transmission speed 33 /TRKO I Track 00 signal
2 XTALSET I Clock select 34 /INDEX I Index signal
3 /RESET I Rest 35 /RDATA I Read data input from FDD
4 E//RD I Enable/Read 36 XTAL2 Clock
5 RW//WR I Read/write/Write 37 EXTAL2
6 /CS I Chip select 38 NC
7 /DACK I DMA acknowledge 39 XTAL1 Clock
8 RS0 I Register select 40 EXTAL1
9 RS1 I 41 VSS4 Ground
10 VSS1 Ground 42 VSS5
11 VSS2 43 NC
12 D0 I/O 44 VCC2
13 D1 I/O 45 VCC3 Power supply
14 D2 I/O 46 VCC4
15 D3 I/O Data bus 47 /WGATE O Write control
16 D4 I/O 48 /WDATA O Writ data to FDD
17 D5 I/O 49 VSS6 Ground
18 D6 I/O 50 /STEP O Step signal to control head of FDD
19 D7 I/O 51 /HDIR O Direction
20 /DREQ O DMA request 52 /HLOAD O Head load
21 /IRQ O Interrupt request 53 /HSEL O Head select
22 /DEND I Data end 54 VSS7 Ground
23 VSS3 Ground 55 /DS0 O
24 1/2 EX1 56 /DS1 O Drive select
25 VCC1 Power supply 57 /DS2 O
26 NUM1 I 58 /DS3 O
27 NUM3 I 59 VSS8 Ground
28 IFS I Host interface select 60 /MON0 O
29 SFORM I Format data 61 /MON1 O Motor on
30 /INP I Index pulse 62 /MON2 O
31 /READY I Ready from FDD 63 /MON3 O
32 /WPRT I Write control signal 64 VSS9 Ground
KS0065B(XV933A00) LCD DRIVER
PIN
NO. NAME I/O FUNCTION PIN NO. NAME I/O FUNCTION
1 SC29 O 31 Vcc LCD driver circuit (-5V)
2 SC28 O 32 CL1 I Data shift
3 SC27 O 33 CL2 I Latch clock
4 SC26 O 34 GND(Vss) GND (0V)
5SC25 O 35DL1 I/O
6SC24 O 36DR1 I/O
7 SC23 O 37 DL2 I/O Data input / output
8SC22 O 38DR2 I/O
9SC21 O 39 NC
10 SC20 O 40 M I
Alternated signal for LCD driver output
11 SC19 O 41 SHL1 I Data interface
12 SC18 O Segment signal output 42 SHL2 I Data interface
13 SC17 O for LCD driving 43 FCS I Mods selection
14 SC16 O 44 V1 I
15 SC15 O 45 V2 I
16 SC14 O 46 V3 I Power supply
17 SC13 O 47 V4 I
18 SC12 O 48 V5 I
19 SC9 O 49 V6 I
20 SC10 O 50 SC40 O
21 SC11 O 51 SC39 O
22 SC8 O 52 SC38 O
23 SC7 O 53 SC37 O
24 VDD Power supply 54 SC36 O Segment signal output
25 SC6 O 55 SC35 O for LCD driving
26 SC5 O 56 SC30 O
27 SC4 O Segment signal output 57 SC31 O
28 SC3 O for LCD driving 58 SC32 O
29 SC2 O 59 SC33 O
30 SC1 O 60 SC34 O
(DM IC800)
(PN IC200)

11
PSR-540
KS0066U-10B(XV226A00) LCD DRIVER
PIN
NO. NAME I/O FUNCTION PIN NO. NAME I/O FUNCTION
1S22O 41DB2I/O
2S21O 42DB3I/O
3 S20 O 43 DB4 I/O Data interface
4S19O 44DB5I/O
5S18O 45DB6I/O
6S17O 46DB7I/O
7S16O 47C1O
8S15O 48C2O
9S14O 49C3O
10 S13 O 50 C4 O
11 S12 O Segment signal output for LCD 51 C5 O
12 S11 O driving 52 C6 O
13 S10 O 53 C7 O
14 S9 O 54 C8 O Common signal output for LCD
15 S8 O 55 C9 O driving
16 S7 O 56 C10 O
17 S6 O 57 C11 O
18 S5 O 58 C12 O
19 S4 O 59 C13 O
20 S3 O 60 C14 O
21 S2 O 61 C15 O
22 S1 O 62 C16 O
23 Vss Ground 63 S40 O
24 OSC1 I Oscillator 64 S39 O
25 OSC2 O Oscillator 65 S38 O
26 V1 66 S37 O
27 V2 67 S36 O
28 V3 Power supply 68 S35 O
29 V4 69 S34 O
30 V5 70 S33 O
31 CLK1 O Data latch clock 71 S32 O Segment signal output for LCD
32 CLK2 O Data shift clock 72 S31 O driving
33 Vdd Power supply (+5V) 73 S30 O
34 M O
Altemated signal for LCD driver output
74 S29 O
35 D O Display data interface 75 S28 O
36 RS I 76 S27 O
37 R/W I Read/ write 77 S26 O
38 E I Enable 78 S25 O
39 DB0 I/O Data interface 79 S24 O
40 DB1 I/O Data interface 80 S23 O
(PN IC100)

PSR-540
16
14 014: Output R Connect the level meter (with a JIS-C filter) to the [PHONE/AUX OUT] jack. (33
ohm load)
Set the [MASTER VOLUME] at maximum.
Check the output level (1kHz).
Phones L: Less than -60.0 dBm
Phones R: -10 dBm +/- 2 dB
15 015: Output L Connect the level meter (with a JIS-C filter) to the [PHONE/AUX OUT] jack. (33
ohm load)
Set the [MASTER VOLUME] at maximum.
Check the output level (1kHz).
Phones L: -10 dBm +/- 2 dB
Phones R: Less than -60.0 dBm
19 019: D/A Noise Connect the level meter (with a JIS-C filter) to the [PHONE/AUX OUT] jack. (33
ohm load)
Set the [MASTER VOLUME] at maximum.
Phones L/R: Less than -80 dBm
20 020: SW, LED Chk Check the switches on the panel.
Press the switches that are displayed on the LCD.
A pre-assigned note is output when pressing the switch.
The test results appear on the LCD.
21 021: ALL LED On Check that the LED on the panel is on.
22 022: Red LED On Check that the red LED on the panel is on.
23 023: Green LED On Check that the green LED on the panel is on.
28 028: All LCD On Check that all LCD dots are on.
29 029: All LCD Off Check that all LCD dots are off. The LCD becomes white
31 031: Pedal1 Chk Connect the foot switch to the [FOOT SWITCH] jack.
Check that the C3 note is output when starting the test program.
Check that the C4 note is output when pressing the pedal and that the tone is
turned off when releasing the pedal.
The test results appear on the LCD.
37 037: Midi Chk After connecting the [MIDI IN] jack and [MIDI OUT] jack with a MIDI cable, ex-
ecute the test.
Check that the C4 note is output and that the test results appear on the LCD.
38 038: To Host Chk For factory test use only
40 040: Battery Chk Checks the voltage of the Battery terminal
41 041: Rom Chk2 Checks the ROM
The test results appear on the LCD.
42 042: Ram Chk2 Checks the RAMs that are connected to the CPU.
The test results appear on the LCD.
43 043: WaveRom Chk2 Checks the WAVE ROMs that are connected to the CPU.
The test results appear on the LCD.
44 044: WaveRam Chk1 Checks all the WAVE RAMs that are connected to the CPU.
The test results appear on the LCD.
46 046: Backup Chk2 Performa the RAM back-up check.
Check that the display reads “NG,” then turn off the power switch.
Enter the test program and perform the RAM back-up checks, then check again.
Check that the LCD displays “OK.”
Note: Do not turn on the power switch by normal mode while standing by, as
the RAM data will be lost.
47 047: Factry Set All the RAMs are initialized and set to the factory preset date when executing
this test. The results appear on the LCD.
48 048: Test Exit Exit from the test program after executing this test.
1 001: Version Displays Rom version
Rom (Program, Wave) versions are displayed alternately on the LCD.
2 002: Rom Chk1 Checks the ROM
The tset results appear on the LCD.
3 003: Ram Chk1 Checks all the RAMs that are connected to the CPU.
The test results appear on the LCD.
4 004: WaveRomChk1 Checks the WAVE ROMs that are connected to the CPU.
The test results appear on the LCD.
7 007: FDD Chk Insert the floppy disks one by one (2DD and 2HD).
Checks the floppy disk drive unit
9 009: Eff1Ram Chk Checks the effect RAM1
11 011: TG1 Chk Outputs the sine wave by changing the channels in sequence from C2 to G4.
After auto-scaling is finished, individual keys can be played. (If playing two or
more keys simultaneously, the first pressed key has priority to make a sound.)
13 013: Pitch Chk Connect the frequency counter to the [PHONE/AUX OUT] jack.
Set PAN to Center and produce a signal at 440 Hz +/- 0.22.
Check that the correct signal is produced.
1. TEST PROGRAM
A. PREPARATION
1) PA-6 (AC adapter) is used.
2) The volume is usually moved to the use position when no volume change is required.
3) Measuring instruments:
Frequency counter
Level meter (with JIS-C filter)
Note: Use a stereo plug to the [PHONES / AUX OUT] jack at 33 ohms.
4) Jigs:
Foot switch, MIDI cable, Floppy Disk(2HD, 2DD)
B. HOW TO ENTER THE TEST PROGRAM
AUTO MODE
While pressing the C3#, F3 and G3# keys, turn the [STAND BY/ON] switch to the “ON” position.
MANUAL MODE
While pressing the C2#, F2 and G2# keys, turn the [STAND BY/ON] switch to the “ON” position.
C. PROCEEDING THROUGH THE TEST PROGRAM
AUTO MODE
When the test program is started, the test is automatically executed.
When confirmation is necessary, the test program stops operating and waits for instruction. At this time,
press the [START/STOP] button; the next test is automatically executed.
MANUAL MODE
The LCD will display “TEST” when entering the test program.
To select the program number, use the [BANK +] and [NEXT -] buttons.
To execute the test, press the [START/STOP] button.
To proceed to the next test, press the [START/STOP] button.
D. TEST PROGRAM LIST
TEST.NO LCD(initial) Test functions and Judgement Criteria

PSR-540
17
All one touch setting (user) and song memory data, plus the other settings listed above, will be erased
and/or changed when the data initialization procedure is carried out.
Carrying out the data initialization procedure will usually restore normal operation if the PSR-540
freezes or begins to act erratically for any reason.
2. INITIALIZE
Except for the data listed below, all PSR-540 panel settings are reset to their initial settings whenever the power
is turned on. The data listed below are backed up (i.e. retained in the memory) as long as either an AC adaptor
is connected or a set of batteries is installed.
User Song Data Metronome Volume
User One Touch Setting Data Touch On/Off
One Touch Setting Bank Number Touch Sensitivity
EZ Chord Data Split Point
EZ Chord Bank Number Data Accompaniment Split Point
Smart Chord Number Footswitch Assign Function
Data Initialization
All data can be initialized and restored to the factory preset condition by turning on the power while holding the
highest (rightmost) white key on the keyboard. “CLr Backup” will appear briefly on the display.

PSR-540
C1
Note:See parts list for details of circuit board component parts.

PSR-540
C2
Note:See parts list for details of circuit board component parts.
WARNING
Components having special characteristics are marked and must be replaced
with parts having specification equal to those originally installed.