Korg X3 User manual

SERVICE MANUAL
MUSIC WORKSTATION
CONTENTS
1. SPECIFICATIONS 1
2. STRUCTURAL DIAGRAM 2
3. BLOCK DIAGRAM 4
4. CIRCUIT DIAGRAM -.5
5. P.C. BOARDS 9
6. HOW TO DISASSEMBLY 13
7. DIAGNOSTIC TEST 16
8. CHECKPOINTS 26
9. REFERENCE DATA 30
10. WAVE ROM SOUND LIST 42
11. PARTS LIST 49

1. SPECIFICATIONS
P80G/SEQ data card slot &PCM data card slot
Daiper pedal &Assignable pedal
L/MONO. R&PHONES
IN. OUT &THRU
16 X2custoi LCD indicator with EL backlight
3.5 inch /2DD disk drive(720k byte for MS-DOS format)
1.055(W) X338.3(D) x96(H)ma
10kg
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PART NO SCREfS PART CODE
ABT BBZMC 3X8 791060308
B BT BZMC 3X8 791030308
C BT BBZMC 4X10 791060410
PART NO PART NANE PART CODE
1X-115 PANEL K0C-C10126 641040200
2X-115 LCD WINDOW KOC-E40352 630018900
3X-631 SLIDE VR KNOB K0C-E40239 620019700
4RUBBER FOOT FF-OCl 500018SOO
5X-952 LTYPE ANGLE 641019800
6X-Oll/012 CARD GUIDE 646039400
7X-OI 1/012 CARD SLOT 646039500
8X-952 POWER Sff KNOB E40304-2 620024600
9X-943 JACK PLATE 641021900
10 P.C. BOARD KLM-1645 (MAIN) 001164500
11 P.C. BOARD KLM-1646 (JACK) 001164600
DIAGRAM

m
riiMKiii SCREiS
ABT BZMC 3X8 791030308
BBT BZNC 3X10 791030310
cCT BZMC 3X6 715230306
BT BBZNC 3X8 791060308
EBT 8ZNC 3X8 791030308
BT BBZNC 4X10 791060410
[W TS SSE ZNC 4X10 715130411
fBssmsm PART NAME
1X-115 PANEL K0C-C10126
2KEYBOARD NEI LC-61
3X-115 SIDE PLATE RKOC-E10086
4X-115 KB SUPPORT K0C-C40913
5JOYSTICK ASSEMBLY
6X-115 CP ANCLE K0C-C40916
7X-115 SIDE PLATE LE10084/85
8X-115 PU CHASSIS K0C-C3O411
9DATA LINE FILTER ESD-R-25D-B
10 X-115 SUPPORT RAIL K0C-C2O272
11 POWER SUPPLY UNIT KLM-1649 JU
11 POWER SUPPLY UNIT KLN-16S0 E
12 P.C. BOARD KLM-1648 (PANEL)
13 LCD DMC50271N-SEW-B-1
14 P.C. BOARD KLK-1647 (PANEL)
15 X-115 FDD ANGLE K0C-C20273
16 FDD EME213KRJ
17 POWER SW J-U3065S01
18 INLET SOCKET PA-125-10
19 X-115 METAL FITTING OF POWER SW
20 X-115 SHIELD .SHEET K0C-C30414
641040200
420004700
646046700
641039600
841039800
646046600
641039500
525000100
641040000
002164900
002165000
001164700
313002800
001164700
641039400
430008107
375011500
540012400
641039700
630019300

.
BLOCK
DIAGRAM

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.
CIRCUIT
DIAGRAM

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5. P.C. BOARDS KLM-1647 KLM-1648
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6. HOW TO DISASSEMBLY
II. Remove the BottonTPlatel
1)
Remove al! the screws on the bottom plate and carefully lift the plate.
CBT BBZMC 3X8] X4
CBT BBZ«C 4X10] X18
g. Remove tl^e Wain board(KLIir-T645)
1) Unplug all the harnesses on the KLM-1645 board.
2) Remove 3pcs. of the screws on the side of the keyboard.
CBT BZMC 3X8] X3
3) Remove 4pcs. of the screws on the back side
and remove the KLM-1645 board.
CBT BBZMC 3X8] X4
B. Remove the Analog board(KLM-!6485
1) Unplug all the harnesses on the KLM-1848 board.
2) Remove 2pcs. of the screws on the side of the keyboard.
CBT BZMC 3X8] X2
3) Remove 4pcs. of the screws on the back side
and remove the KLM-1648 board.
CBT BBZMC 3X83 X4
14. Remove the Power Supply Unit Assemblyl
1) Unplug 3pcs. of the harnesses on the power supply board.
2) Remove 4pcs- of the screws on the power supply unit chassis.
CBT BZMC 3X8] X4
3) Remove 4pcs. of the screws on the back side
and remove the power supply unit assembly
CBT BBZMC 3X8] X4
13

B.ReiBove the Floppy Disk Drive Assemble
1) Unplug the SUMl harness froi the floppy disk drive.
2) Remove 4pcs. of the screws on the FDD angle
and remove the floppy disk drive.
CBT BZHC 3X10] X4
»U CHASSI) ASSY POWER SW METAU PITTIHO fr0DKLM- 1«4J FDD A«I
r
B. Remove the LCD Unit
1) Remove 9pcs. of the screws on the KLN-1648 board
and remove the shield sheet.
CBT BZMC 3X8] X4
CBT BZMC 3X10] X5
2) Remove ascrew on the XLM-1648 board (mark: LCD GND)
and remove the ground harness of the LCD.
CBT BZMC 3X8] XI
8) Remove 3pcs. of the screws on the LCD and remove the LCD unit.
CBT BZMC 3X8] X3
f7. Remove the Panel Boards(KLM-1647/16478]|
1) Remove 2pcs. of the screws on the KLM-1648 board
and remove the KLM~1648 board.
CBT BZMC 3X8] XI
CBT BZMC 3X10] XI
2) Remove 8pcs. of the screws on the KLM-1647 board
and remove the KLM-1847 board.
CBT BZMC 3X8] X§
CBT BZMC 3X10] X4
14

1) Refflove 6pcs. of the screws on the support rail.
[BT BZMC 3X8] X6
2) Remove 4pcs. of the screws on the keyboard and remove the keyboard.
CBT BZMC 3X8] X4
1) Loosen the spiral clip of the joystick harness.
2) Remove 4pcs. of the screws on the joystick frame
and remove the joystick assembly.
CBT BZMC 3X8] X4
5

7. DIAGNOSTIC TEST
The X3 has atest aode for checking nunerous functions,
ffhen the test node is activated, the X3 internal data is initialized.
Hence, if the X3 contains any necessary data, save this data on afloppy
disk beforehand. The figure below shows the equipment and settings
required for carrying out tests.
t<Settings for Tests>
MONITOR OSCILLO-
SPEAKER SCOPE
The RAM card used in the test mode must be formatted
in advance, and the protect switch must be OFF.
Use XSC'801 as the PCM card.
16

X<Activating Test Node>
Insert the PCM card and the RAM card into their respective slots,
and insert ablank disk for testing into the floppy disk drive.
Turn on the power while pressing both [ENTER] and [5].
This activates the test lode.
When the test node is activated, the internal tests listed below are done
autoiatical ly. If the results of these tests are all nornal, the systen
loves on to the external test Item 1, <Panel SW Test>.
The internal test iteis are as follows^
*Systei RON Check Sui
*Internal RAM Test
*Card RAM Test
*LCD RAN Test
*TGL I/F Test
*Internal Battery Test
*Card Battery Test
'NIDI Loop Test
*PCM RON TG I/F Test
*PCM CARD TG I/F Test
(Internal TestttOl)
(Internal Test#02)
(Interanl Test#03)
(Internal Test#04)
(Internal Test#05)
(Internal Test#06)
(Internal Test#07)
(Interanl Test#08)
(Internal TestifOO)
(Internal TestUlO)
If any of the internal tests results in an error, the details are
displayed on the LCD.
^Notes:
-The fora of activation of the test aode depends on the combination
of keys* pressing while the power is turned on. They are as follows:
[11+EENTER]
[51+EENTER]
[7]
+[ENTER]
[8]
+[£NTER]
To perfora tests using the test menu.
To perfora internal and external tests.
To display the System Version No. only.
To perfora external tests only.
Ordinarily, is used.
-Use the following keys to aove back and forth among the test steps:
Cursor key []:
Cursor key [^]: Move forward
Move backward
17

*<Error Nessages>
Internal RAM Test
-When an error occurs in the RAM data bus
/
SRAM Write/Rea
ErroriVerify
<
Card RAH Test
-When the protect switch is on
RAM CARD
Err^Protect
V
LCD RAN Test
-When an error occurs in the LCD data bus
LCD RAM W/R
Error:Verify
J
Internal Battery Test
-When the internal battery is low, or when abattery is not loaded
/
Internal Batt
Error: Low
1
18

Card Battery Test
-When the RAM card is low, or when the battery is not set
CardBatt
Error:Low
NIDI Loop Test
-When the MIDI cable is not connected
PCN RON TG I/F Test
-When an error occurs in the PCM ROM data bus
f*: Bank number where PCM ROM
error found
x: Address where PCM ROM
PCMI* Aixxxxxx error found
P’yyyy Rizzzz y: Correct data for indicated
Jaddress
zi Data read from indicated
address
PCN CARD TG I/F Test
-When aPCM card (XSC-801) is not set
PCMCd a: 000000
PUBFF R:DFFF
V
19

*<BxternsI Test>
<Panel Sf Test> External TestHOl
-This test is done by pressing the switches in the order indicated
on the LCD. When CENTER] is pressed once, the LCD displays the name of
the switch being checked. If the switch that was pressed does not go on,
or if the switch that was pressed is not the one displayed on the LCD,
the test cannot proceed.
-If the check of CENTER] is normal, the system automatically moves on
to the next test.
<LCD Pixel &FDD Test> External Test*J02
Step 1Checking that LCD pixels light
-Press ENTER and check that all the LCD pixels are lit.
Here, also move the VALUE slider and check that the contrast (brightness)
changes smoothly.
M’T.WaTIMBOE 123AS67S91011121314 1516
TRACK *
COMBI CA
PROG D B
SEQ GM
GLOBA!
DISK
EVENT
pattern
E^Pt>*»STEP
Step 2Checking that LCD pixels go out
-Press CENTER] and check that the LCD goes completely blank.
Step 3Checking that the floppy disk drive access LED lights
-Press CENTER] and check that the floppy disk drive access LED is lit.
After you have completed this check, press CENTER] and proceed to
the next test.
20