Table of Contents
Advertisement
10. TECHNICAL DESCRIPTION
XLK-5
This unit is composed of CTH-38B, KCH-21A, KCH-22A, KCH-23A.
1. MAIN BOARD : CTH-38B
The CTH-38B operates scanning contact board and the switch of CU-1, merging the
musical messages which is the XLK-5 received from the H-BUS and scanning, and
sending the messages to the H-BUS. These function is operated by Main CPU (U3).
2. CONTACT BOARD : KCH-21A,22A,23A
The contact board is composed of KCH-21A (PRESET KEY), KCH-22A and KCH-23A
(MUSICAL KEY).
The CTH-38B sends the keyscan signal to the KCH-22A through the FFC cable, and the
signal branches to the KCH-21A, KCH-23A.
The one key has the set of three contacts. The keyscan signal returns to the CTH-38B
via the contacts.
By conducting the contacts in turn, the CTH-38B scans the time difference of receiving
the signals, and the CTH-38B sends the musical messages in turn.
Advertisement
Table of Contents
