KORG KMS 30 SERVICE MANUAL

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MIDI SYNCHRONIZER

$3825 KMS-Bfl

CONTENTS
I. SPECIFICATIONS ................................. 2
2. STRUCTURAL DIAGRAM ........................... 3
3. BLOCK DIAGRAM ................................ 4
4. CIRCUIT DIAGRAM ............................... 5
5. PC BOARD ...................................... 6
6. CIRCUIT DESCRIPTIONS ............................ 7
7. TROUBLESHOOTING CHART ......................... 9
8. PARTS LIST ..................................... IO

KEIO ELECTRONIC LABORATORY CORPORATION
TOKYOIJAPAN

THIS MAMJAL WAS SCANNED. CLEANED AND MADE AVAILABLE AS FREE DOWNLOAD BY SYNFONL

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1. SPECIFICATIONS

0 MIDI Section MIDI lel

MIDI OUT x 2

(MIDI OUT jacks act as MIDI THRU
when MASTER CLOCK is set to MIDI.)
0 SYNC Section SYNC IN x1

SYNC OUT x 2

24/48 Clock Frequency Switches x 3
0 TAPE Section TAPE IN x I

TAPE OUT x 1

(RCA Phono Jacks; Line Level)

. SYNCH RONI- ON/OFF x1
ZATION

0 MASTER MlDl/SYNC/TAPE Selector x 1
CLOCK SELECT

O TEMPO LED Indicator x 1

0 POWER ON/OFF x I

0 Input/Output MIDI IN x1 (DIN Jack)

Jacks MIDI OUT x 2 (DIN Jacks)
SYNC IN x1 (DIN Jack)
SYNC OUTx 2 (DIN Jacks)
TAPE IN x1 (RCA Phono Jack)
TAPE OUT x 1 (RCA Phone Jack)
DC 9V x 1

0 Dimensions 232(W) x 35(H) x 131(D) mm

0 Weight 8509
O Supplied AC Adaptor (9V) x 1
Accessories
0 Options MIDI CABLE
START/STOP
lam:

CLOCK

Synero Terminal

Start/stop clock signal is not output until 10 msec. (inhib-
ited time of syncro signal). Passed just after syncro on/off
switch is set to on. No signal is output when the switch is
off.

MIDI IMPLEMENTATION

RECEIVE DATA

STATUS DATA BYTES DESCRIPTION
11111000 TIMING CLOCK
11111010 START
11111100 - STOP
TRANSMIT DATA
STATUS DATA BYTES DESCRIPTION
11111000 TIMING CLOCK
11111010 START
11111100 - s'rop

START

q ____________
I, CLOCK

Hoe
TAPE OUT

LEADER

Tape Syncro:

Only clock signal can be saved in external tape at 48/J (48
clock frequency per quarter note). lts wave shape is like
rectangle and its value is 0,340 msec, 1:320 msec. Its value
is 0 when it stops. In case syncro play is controlled by clock
signal in external tape, it starts when leader part of the tape
changes to clock signal, and it stops when time value of
clock signal being 0 over 125 msec, It is impossible to read
clock signal = 0 from leader part for there is no stop signal
in a tape. 80 it is set to play when clock signal frequency is
over J = 20, and when it is under J = 20, it is read as leader
part and syncro play stops