Casio WK-3800 User manual

ELECTRONIC KEYBOARD
WK-3800
JUL. 2006
WK-3800
INDEX

CONTENTS
SPECIFICATIONS ----------------------------------------------------------------------------------------- 1
BLOCK DIAGRAM ---------------------------------------------------------------------------------------- 3
CIRCUIT DESCRIPTION--------------------------------------------------------------------------------- 4
PRINTED CIRCUIT BOARD ---------------------------------------------------------------------------- 6
DISASSEMBLY--------------------------------------------------------------------------------------------11
DIAGNOSTIC PROGRAM----------------------------------------------------------------------------- 17
EXPLODED VIEW --------------------------------------------------------------------------------------- 20
PARTS LIST ----------------------------------------------------------------------------------------------- 21
SCHEMATIC DIAGRAMS ----------------------------------------------------------------------------- 25

— 1 —
SPECIFICATIONS
GENERAL
Keyboard: 76 keys with touch response (OFF/1/2/3)
Tones: 400 Advanced Tones + 200 Preset Tones + 20 Drum Sets + 100 standard user tones
+ 20 user tones with waves*1+ 4 user drum sets with waves*1+ 50 drawbar organ
tones + 100 user drawbar organ tones (894 tones total); layer/split
Polyphony: 32 notes maximum (10 for certain tones)
Drawbar Organ Function
Drawbars: 9 (16’, 5 1/3’, 8’, 4’, 2 2/3’, 2’, 1 3/5’, 1 1/3’, 1’)
Percussion: Second, Third
Click: On, Off
Effects: DSP (200 types: internal, 100 user areas) + Reverb (16 types) + Chorus (16 types) +
Equalizer (10 types, 4 bands)
Auto Accompaniment
Rhythm Patterns: 182 (internal, 16 user areas*1)
Tempo: Variable (226 steps, = 30 to 255)
Chords: 3 fingering methods (CASIO CHORD, FINGERED, FULL RANGE CHORD)
Rhythm Controller: START/STOP, INTRO/ENDING 1 and 2, VARIATION/FILL-IN 1 and 2, SYNCHRO/
FILL-IN NEXT
Accomp Volume: 0 to 127 (128 steps)
One-touch Presets: Recalls settings for tone, tempo, layer on/off, and harmonize on/off in accordance
with rhythm.
Auto Harmonize:v 10 types : Automatic addition of notes that harmonize with melody note in accordance
with specified Auto Accompaniment chords.
Memory Function
Songs: 5
Recording Tracks: 6 (2 through 6 are melody tracks)
Recording Methods: Real-time, step
Memory Capacity: Approximately 10,000 notes (total for 5 songs)
Edit Function: Equipped
Demo Tunes: 3
Tune Number Name Composer
0 Malibu Sun TECH-NOTE INTERNATIONAL LTD.
1 Island Dusk TECH-NOTE INTERNATIONAL LTD.
2 Ticket to Cambridge TECH-NOTE INTERNATIONAL LTD.
Synthesizer Function
Parameters: Attack time; release time; resonance; cutoff frequency; vibrato type; vibrato delay;
vibrato depth; vibrato rate; octave shift; level; touch sense; reverb send; chorus send;
DSP line; DSP type; DSP parameter; Modulation Assign
Registration Memory
Number of Setups: 32 (4 setups ✕8 banks)
Memory Contents: Tone, Rhythm, Tempo, Layer on/off, Split on/off, Split point, Harmonize on/ off, Mixer
settings (Channels 1 to 10), Effect settings, Touch Response settings, Assignable
jack setting, Transpose, Tuning, Accompaniment volume setting, Pitch bend range,
Auto Harmonize type, MODE button setting, Synchro standby state, Mixer Hold, DSP
Hold, Synthesizer Mode parameters
Mixer Function
Channels: 16
Parameters: Tone; part on/off; volume; pan pot; octave shift; coarse tune; fine tune; reverb send;
chorus send; DSP line; DSP level, DSP pan, DSP system reverb send, DSP system
chorus send
MIDI: 16 multi-timbre receive, GM Level 1 standard
Other Functions
Pitch Bend Range: Adjustable (12 semitones upwards and downwards)
Modulation: Equipped
Transpose: 49 steps (–24 semitones to +24 semitones)
Tuning: Variable (A4 = approximately 440Hz ±100 cents)
LCD: Adjustable contrast

— 2 —
SMF Player: Flash memory storage for up to 200 files*1
Supported Format: SMF0
Flash Memory
Capacity: 4MB*2
Shared Area: Approximately 3.5MB*2(waveform data, accompaniment data, SMF data)
Further storage of waveform, accompaniment, and SMF data becomes impossible
after the total of such data reaches approximately 3.5MB.
SD Memory Cards
Supported SD Memory Cards : 1GB or less (Cards with capacity greater than 1 GB are not supported.)
Functions: Save and load of user tones, user songs, and registration data; playback of SMF; card
formatting; file delete; file rename
Floppy Disk Drive
Type: 3.5" FDD
Formats: 2DD (720KB MS-DOS format)
2HD (1.44MB MS-DOS format)
Functions: Save and load of user tones, user songs, and registration data; playback of SMF; disk
formatting; file delete; file rename
Terminals
SD memory card slot
USB port: TYPE B
Sustain/Assignable Terminal : Standard jack (sustain, sostenuto, soft, rhythm start/stop)
Headphones: Stereo standard jack
Output Impedance : 200Ω
Output Voltage : 250mV (RMS) MAX
Line Out (R, L/MONO): Standard jack ✕2
Output Impedance : 3kΩ
Output Voltage : 1.5V (RMS) MAX
Power Supply Terminal: 12V DC
Power Supply: Dual power supply system
Batteries: 6 D-size batteries
Battery Life: Approximately 4 hours continuous operation on alkaline batteries
AC Adaptor: AD-12
Auto Power Off: Turns power off approximately six minutes after last key operation. Enabled under
battery power only, can be disabled manually.
Speaker Output: 6.1W + 6.1W
Power consumption: 12V 18W
Dimensions: 122.3 ✕42.3 ✕16.0cm (48 3/16 ✕16 11/16 ✕6 5/16 inch)
Weight: Approximately 10.0kg (22.0 lbs) (without batteries)
*1The same memory area is used to store waveform data, accompaniment data, and SMF data.
*2Noted capacities are calculated values based on 1MB = 10242bytes.
ELECTRICAL
Current drain with 12 V DC:
Consumption Current 1770 mA ±20 %
Consumption Current at idle 290 mA ±20 %
with 12 keys from F3 to E4 pressed in 479 Ocarinag + LAYER
Volume: maximum, Velocity: maximum
Speaker output level (Vrms with 8 Ωload each channel):
with key L(E1)/R(G1) in 479 Ocarinag
Volume: maximun, Velocity: maximum L: 5400 mV ±20 %
R: 5200 mV ±20 %
Phone output level (Vrms with 32 Ωload each channel):
with key L(E7)/R(G7) in 479 Ocarinag
Volume: maximun, Velocity: maximum L: 370 mV ±20 %
R: 380 mV ±20 %
Line Output level (Vrms with 47 KΩload each channel):
with key L(D4)/R(B5) in 479 Ocarinag
Volume: maximun, Velocity: maximum L: 380 mV ±20 %
R: 380 mV ±20 %

— 3 —
BLOCK DIAGRAM
CONSOLE PCB
(M740-CNA1)
Keyboard PCBs
(M764T-KY1M/
KY2M)
SUB PCB
(M740-PSA1)
MAIN PCB
(M740-MDA1)
LCD PCB
(M734-LCD1M)
CONSOLE PCB
(M740-CNA5)
CONSOLE PCB
(M740-CNA4)
CONSOLE PCB
(M740-CNA6)
RAM (1Mbit)
IC5
CY62128DV30LL
Reset IC
IC6
R1151N001C-TR
RESET
16.384MHz
EA0 ~ EA15, EA18
ED12 ~ ED19
A1 ~ A17
D0 ~ D15
Assingnable Jack
DAC IC1
uPD63200GS
Power Amplifier
IC205, LA4636
Power Supply Circuit
Q201 ~ Q204,
IC201, D205, D206
(9-12V)
VC
APO Battery
Speakers
(L)
(R)
Phones/Output
LOUT
CONT
E
R/W
RS
ROUT
(5V)
VF5
(5V)
VA5
(5V)
VD5
(9-12V)
VCP
FLASH ROM (32MBit)
IC11
LH28F320BFHE
RAM (2Mbit)
IC7
LP62S2048X-70LLT/Q
ROM (128Mbit)
IC10
MR27T12800LO
LCD Controller
ML9040-B02GA (IC401)
D214 D201
Smart media Unit
MA0 ~ MA20
MA0 ~ MA21
MA0 ~ MA16, MA25
CONSOLE PCB
(M740-CNA2)
SUB PCB (M740-PSA2)
CONSOLE PCB
(M740-CNA3)
MD0 ~ MD15
MD0 ~ MD15
MD0 ~ MD7
MPU
IC13
uPD914AGM-JED
DRAWBER
DSP
Main
Volume
KC3 ~ KC7 FI10, KI0 ~ KI2
DB0 ~ DB7
SWCO ~ SWC6
SWIO ~ SWI7
PWSW
RESB
TXDO
TXDI
ARXD, ATXD, ZX-BUSYB,
SYSRSTB, BEND, MOD
BUTTON/LED
CONTROLLER
IC301
UPD65881GK-1019ETA
Buttons
SI0 ~ SI9, FI0 ~ FI9
KC0 ~ KC7
DATA ACCESS
KEY/BUTTON/SD CARD
CONTROLLER
IC20
TC190C020AF-001
RAM (128 x 16bit)
IC23
LP62S16128BV
AC ADAPTOR
DC 12V
Keyboard
FDD Controller
IC21
ML6757GA-115
3.5" FDD Unit
MA0 ~ MA13, MA25
MD0 ~ MD7
LINE OUT
L R
Filter
IC204, NJM2008D
Filter
IC204, NJM2008D

— 4 —
CIRCUIT DESCRIPTION
KEY MATRIX
KC0 KC1 KC2 KC3 KC4 KC5 KC6 KC7
FI0 E11F11F#11G11G#11A11A#11
SI0 E12F12F#12G12G#12A12A#12
FI1 B11C21C#21D21D#21E21F21F#21
SI1 B12C22C#22D22D#22E22F22F#22
FI2 G21G#21A21A#21B21C31C#31D31
SI2 G22G#22A22A#22B22C32C#32D32
FI3 D#31E31F31F#31G31G#31A31A#31
SI3 D#32E32F32F#32G32G#32A32A#32
FI4 B31C41C#41D41D#41E41F41F#41
SI4 B32C42C#42D42D#42E42F42F#42
FI5 G41G#41A41A#41B41C51C#51D51
SI5 G42G#42A42A#42B42C52C#52D52
FI6 D#51E51F51F#51G51G#51A51A#51
SI6 D#52E52F52F#52G52G#52A52A#52
FI7 B51C61C#61D61D#61E61F61F#61
SI7 B52C62C#62D62D#62E62F62F#62
FI8 G61G#61A61A#61B61C71C#71D71
SI8 G62G#62A62A#62B62C72C#72D72
FI9 D#71E71F71F#71G71
SI9 D#72E72F72F#72G72
Note: Each key has two contacts, the first conatct 1and second contact 2.
Key
Second contact First contact FI
KC
SI
21
NOMENCLATURE OF KEYS
C2 C3 C4 C5 C6 C7 G7E1

— 5 —
BUTTON MATRIX
KI2
AUTO HARMONIZE
0
1
7
FI10
+
3
6
DEMO
KI0
LAYER
2
5
9
KI1
SPLIT
–
4
8
KC4
KC5
KC6
KC7
SWI2
MODE
START/
STOP
TEMPO
UP
CH3
SYNTH
1 FEET
DOWN
PIANO
SETTING
SWI3
INTRO/
ENDING 1
BANK
CH9
CH4
EFFECT
STORE
ORGAN
SWI0
ACCOMP
VOLUME
SONG
MEMORY
CARD
CH1
TRANCEPOSE/
FUNCTION
RHYTHM
SWI1
ONE
TOUCH
PRESET
TEMPO
DOWN
SMF
PLAYER
CH2
MIXER
TONE
SWC0
SWC1
SWC2
SWC3
SWC4
SWC5
SWC6
REGISTRATION/SONG MEMORY TRACK
SWI4
INTRO/
ENDING 2
1
CH10
CH5
CH6
DSP
SWI5
VARIATION/
FILL-IN 1
2
CH11
CH14
CH7
EXIT
씰
SWI6
VARIATION/
FILL-IN 2
3
CH12
CH15
CH8
씱
쑼
SWI7
SYNCRO/
FILL-IN
NEXT
4
CH13
CH16
1 FEET UP
쑿

— 6 —
PRINTED CIRCUIT BOARD
MAIN PCB M740-MDA1
Top View
Bottom View

— 7 —
SUB PCB M740-PSA1
Top View
Top View
SUB PCB M740-PSA2

— 8 —
DISPLAY PCB M734-LCD1M
Top View

— 9 —
CONSOLE PCB M740-CNA1
CONSOLE PCB M740-CNA4CONSOLE PCB M740-CNA3CONSOLE PCB M740-CNA2 CONSOLE PCB M740-CNA5 CONSOLE PCB
M740-CNA6

— 10 —
KEYBORD PCB M764T-KY1M
KEYBORD PCB M764T-KY2M

— 11 —
2. Remove 36 screws and then the upper case.
3. Remove 4 screws, 8 speaker cords, 2 battery cords, 1cord (PM), 5 connectors (JD, JG2, JH, JK, JJ) and then the PCB ASS'Y (MA2M).
Speaker cords (O)
Speaker cords (W)
Battery cord (R)
Battery cord (B)
Screw
Connectors
Screw
Screw
Speaker
cords (O)
Speaker
cords (W)
Screw
Connectors
Screws
ConnectorCord
DISASSEMBLY
■The Disassembly Procedure inscribed on this manual is the same as that of WK-3200
since WK-3800 has almost the same frame as WK-3200.
1. Remove the battery cover and then the battery.

— 12 —
4. Remove 5 screws, 5 connectors (JA, JB, JD, JE, JF) and then the PCB ASS'Y (MA1M).
Screws
ConnectorsConnectors
5. Remove 8 screws, 1 connector and then the LCD ASS'Y (LCD1M).
Note: Tighten the screws in the order from 1 to 8 when
reassembling.
Screws
Screws
Connector
367
1852
4

— 13 —
Connector
CN1M
6. Remove the volume knob, screws, connectors and then the CN1, CN2, CN3, CN4, CN5, CN6, CN7.
Screws
Volume knob
CN2M
CN5MCN4M
CN3M
CN6M CN7M
CN1MCN2M CN6M CN5M CN6M
CN3M
CN7M

— 14 —
8. Remove 29 screws and then the lower case.
7. Remove 2 screws and then the Bender assy.
Screws
Note: Tighten the screw with the arrow mark in the figure first when reassembling.

— 15 —
10.Remove the rubber keys.
Projection
Note: Pay attention to the positions of the rubber keys as one of them has a different length.
Match the projections of the rubber keys with the holes of the lower case when reassembling.
9. Remove 24 screws and then the PCB ASSY (KY1M, KY2M).

— 16 —
11.Remove 27 screws and then the white keys.
12.Remove the black keys.
Note: Pay attention to the positions of the screw holes when
reassembling.

— 17 —
DIAGNOSTIC PROGRAM
■ Initial Setup
1. Connect an AC adaptor.
2. Connect a Sustain pedal.
3. "Main" volume: MAX.
NOTE: If there is no pedal or MIDI cable, pedal or MIDI check can be skipped.
■ How to start diagnostic program
1. Press the “POWER” button while pressing the “Cursor key Up” and “Cursor key Down” buttons.
2. Release the “POWER” button first while still pressing the “Cursor key UP” and “Cursor key Down” buttons.
3. Release the “Cursor key UP” and “Cursor key Down” buttons. “TEST 741” appears on the LCD.
NOTE: Refer to the figure below for the LCD messages that appear during the diagnostic program.
■Diagnostic program
1. Button check
1Press “DSP” button.
2Press buttons in the following order.
NOTE: NG sound sounds when a button is defective or buttons are pressed in a wrong order.
LCD message appears in the area 1.
Gran ndP o
514
8 7
2
E
3
BCD A 60 9
1
2
4
3
56
7 8 9 0 A B C D E F G H I J
K
L
OPQRSTUVW
YZ[\]^abc d
f
g h
i
j
k
m
no p q
r
s
ut
yx
v
w z
{
}
|
l
N
M
e
[CH11
\CH12
]CH13
_CH14
aCH15
bCH16
cDSP CH
d
DRAWBAR ORGAN
eTONE
fRHYTHM
gDSP
hPIANO SETTING
i[CURSOR BUTTONS]
UP
jRIGHT
kDOWN
lLEFT
mEXIT
1DSP
2MODE
3
ONE TOUCH PRESET
4CARD
5ACCOMP VOLUME
6SONG MEMORY
7INTRO/ENDING 1
8INTRO/ENDING 2
9
VARIATION/FILL-IN 1
@ VARIATION/FILL-IN 2
A SYNCHRO/FILL-IN NEXT
BSTART/STOP
CTEMPO쑼
DTEMPO쑿
EBANK
FREGISTRATION 1
GREGISTRATION 2
HREGISTRATION 3
IREGISTRATION 4
JSTORE
K
TRANSPOSE/FUNCTION
LMIXER
MSYNTH
NEFFECT
OSMF PLAYER
PCH1
QCH2
RCH3
SCH4
TCH5
UCH6
VCH7
WCH8
UP
YCH9
ZCH10
n
AUTO HARMONIZE
oSPLIT
pLAYER
q0
r1
s4
t7
u8
v5
w2
x-
y+
z3
{6
|9
}DEMO
MODE
OTP
CARD
ACMP VOL
SONG
INT/END1
INT/END2
VAR/FIL 1
VAR/FIL 2
SYNCHRO
STRT/STP
TEMPO/DW
TEMPO/UP
BANK
REGIST 1
REGIST 2
REGIST 3
REGIST 4
STORE
TRN/FUNC
MIXER
SYNTH
EFFECT
SMF
CH1
CH2
CH3
CH4
CH5
CH6
CH7
CH8
1Ft UP
CH9
CH10
CH11
CH12
CH13
CH14
CH15
CH16
DSP CH
DRAWBAR
TONE
RHYTHM
DSP
PIANO
UP
RIGHT
DOWN
LEFT
EXIT
HARMO
SPLIT
LAYER
0
1
4
7
8
5
2
-
+
3
6
9
DEMO
SW OK
Message on LCD Message on LCD Message on LCD Message on LCD

— 18 —
Message on LCD
1ACJ ON
1SUS CHK
1SUS ON
1SUS OFF
1VOLT HI
1TG MAX L
1TG MAX C
1TG MAX R
1ROM CHK
앗
1ROM OK
1FMC CHK
앗
1FMC OK
1DRAM OK
1CRAM OK
2. AC adaptor detection check.
1Press “TONE” button.
2When the instrument detects that an AC adaptor is plugged in, an OK sound
sounds. “ACJ OFF” appears and an NG sound sounds when the AC adaptor
is not plugged (when batteries are used).
3. Sustain jack check. (If no pedal, this check can be skipped)
1Press “RHYTHM” button.
2Press “Sustain pedal” .
3Release “Sustain pedal” .
4NG sound, “OFF” sound this case, must be audible.
4. Low Voltage detection check.
1Press “DRAWBAR ORGAN” button.
2OK sound must be audible.
5. Sound Source check
1Press “7” button.
2The MAX sin sound sounds from Left spesker.
3Press “8” button.
4The MAX sin sound sounds from Both spesker.
5Press “9” button.
6The MAX sin sound sounds from Right spesker.
6. ROM check
1Press “INTRO/ENDING1” button.
7. Flash memory check
1Press “INTRO/ENDING2” button.
8. Flash memory SUM check
1Press “SONG MEMORY” button.
9. DSP RAM check
1Press “VARIATION/FILL-IN 2” button
10. CPU RAM check
1Press “SYNCHRO/FILL-IN NEXT” button.
1FMS CHK
앗
1FMS 7898