KORG POLY 800II SERVICE MANUAL

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PROGRAMMABIE POLYPHONIC SYNTHESIZER

POLY-800 am

" man , //r,m
H . m/wmm

CONTENTS
1. TECHNICAL SPECIFICATIONS ............. 1 6. P.C. BOARD ................................. 20
2. MIDI IMPLEMENTATION .................... 2 7. CIRCUIT DESCRIPTIONS .................. 23
3. STRUCTURAL DIAGRAM ................. 13 8. CHECK AND ADJUSTMENT
4. BLOCK DIAGRAM .......................... 16 PROCEDURE ................................ 26
5. CIRCUIT DIAGRAM ........................ 17 9. PARTS UST .................................. 29

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KEY
C ~ C 49 Keys

MASTER osc

Alter power ON

Variation after 0-10 min.: within :5 cents

Variation after 10 min.~1 hr.: within *5 writs
Temperature characteristics 0~40°C within :10 cents

MASTER TUNE
II MAX + 40 ~ 70 cents
bMAX -40 - 70 cents

DCO
OCTAVE: LOW. MID. HIGH
WAVE FORMsz 16+112 8 + 1l4 4 + 1/8 2'
IL16' +B+4'+2'

LEVEL20-31 32steps
DCO 2 INTERVAL: 0-12 half-steps 13 steps
DETUNE: 0~3

0. 6.5. 13. 26 cents 4 steps

VCF
24 dB/OCT LPF
CUT OFF: 0-99 half-steps 100 steps
RESONANCE: 0 ~15 (O - 0 ~10) 16 steps
KBD TRACK: 0. 50. 100%
POLARITY: /-1 , \I-l
EG INT: O~15 16 steps

CUT OFF = 0~ :10 OCT (220%)
TRIGGER: SINGLE/MULTI

NOISE
0~15 16 steps

EG
0~31 32 steps

MG
0-15 16steps

oco MOD

BEND : 0- 2780 cents (*30 cents)
MG :0-«g160 cents (*40 cents)
MG (JOYSTICK): 0~ a: 160 cents (*40 cents)

VCF MOD
MG: 0-:10 2/300T(:10%)
MG (JOYSTICK): o~ $10 213 OCT (110%)

EOUALIZER
TREBLE: -6~0~ +6 (13 STEP) :10 dB (:20%)
:3 dB POINT:
2 kHz (* 10%)
BASS: --6~0~ +6 (13 STEP) :10 dB (t200/o)
*3 dB POINT:
300Hz (* 10%)
DIGITAL DELAY (DDL)

DELAY TIME: 0~99 (100 STEP) 4 msec~1024 msec
FEED BACK: O~15 (16 STEP) 0-100%
(until osciilatlon ceases)
MOD FREQUENCY: 0-31 (32 STEP) 0.1 Hz- 10 Hz
(* 20%)
M00 INTENSITY: 0-31 (32 STEP) 1 = 5 TYP
(1 - 8 MAX)

EFFECT LEVEL' 0~15 (16 STEP) 1 a 1 max.

Etfect sound produced

SEOUENCER

1note. restortleregardedast step
maximum oi 1.000 steps

SPEED: 1 step regarded as V

J" a 25-250 *20%

MODE: ONE TIME/REPEAT

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TAPE INTERFACE
DATA TRANSMISSION SPEED: approx. 2.000 (bitlsec)
OUTPUT LEVEL: 4.5 mVp-p
INPUT LEVEL: HIGH 3 Vp-p
LOW 1 Vp-p

MIDI

CHANNEL: 1 ~16 CH

PROGRAM CHANGE: DISABLE/ENABLE
SEQUENCER CLOCK: INT/EXT
SOCKET: INIOUT

DIMENSIONS
780(W) x 286(P) x 87.6(H) mm

WEIGHT
4.4 kg (including dry-cell batteries)

ACCESSORIES
Pre-Ioad data tape
Batteries (UM-2 x 6)
Shielded cord (2.5m x 1)

POWER CONSUMPTION
7 W (when using AC adapter)
SUM-2x6 9 V 330 mA :10%

BATTERY LIFE
3.5 hrs. or over (National Hi-Top SUM-2x 6. continuous
usage. 20°C)

EXTERNAL DC POWER RANGE
+7.0V ~ +11.0V

ENVIRONMENTAL CONDITIONS
Temperature: 06 ~ 40°C
Humidity: Below dew point

TIME TO STABLE OPERATION AFTER POWER ON:
300 sec.

PERMISSIBLE LINE NOISE VOLUME

(with AC adapter)

5 min. marked without malfunction at positive polarity
90°. 350 ns, 500 V pulse

ELECTROSTATIC TEST
Normal function at 10 W of static electricity

ENCLOSURE HEAT BUILD-UP
15 or less

AT POWER ON/OFF
spike noise -- less than 300 mVp-p

OUTPUT LEVEL (Line Out)
C4~Cs 8 notes output simultaneously, VOL MAX.
- seam (t 3dB)

NOISE LEVEL
JIS-A AVERAGE
GATE 0N GATE OFF
DDL ON -76 dBm TYP -90 dBm TYP
(-70dBm MAX) (-84 dBm MAX)
DDL OFF -80 dBm TYP -90 dBm TYP
(-74 dBm MAX) (-54 dBm MAX)
ELECTRICAL WAVE INTERFERENCE
Foc (U.S.A.)

VDE (W. Germany)
Certification for each under review.