Roland SH-5 - 3. DESCRIPTION OF ASSEMBLIES; 3-1. KEYBOARD UNIT ASSEMBLY KB-1; 3-2. CONTROL UNIT ASSEMBLY CU-1

3. DESCRIPTION OF ASSEMBLIES
The MODEL SH-5 consists of 4 main units shown below in order of disassembly procedure.
1) KEYBOARD UNIT ASSEMBLY KB-1
2) CONTROL UNIT ASSEMBLY CU-1
3) SUB CHASSIS UNIT ASSEMBLY SU-1
4) POWER SUPPLY UNIT ASSEMBLY PC-5
3-1. KEYBOARD UNIT ASSEMBLY KB-1
This unit is subdivided into smaller blocks:
1) KEYBOARD ASSEMBLY SK-142B
2) CONTROL UNIT ASSEMBLY CU-2
MANUAL BOARD ASSEMBLY OP-25
BENDER ASSEMBLY PB-1
A. Keyboard Circuit
Consists of a constant current source fed to the keyboard resistors which provids specific voltage drops when
keyboard keys are pressed.
This voltage is fed to an S & H Circuit where it is held until another voltage is produced by depressing another key.
The output of this circuit is used for controlling the VCO's and VCF.
A second circuit generates trigger-pulses by means of the ON-OFF manuals under the keys for control of
triggering LFO-1, LFO-2, S/H, and ENV GEN.
B. TUNING, TRANSPOSE, PORTAMENTO
Each controls 2 VCO's simultaneously.
C. BENDER
The voltage output is variable from + to -, and the circuit is for the control of VCO's or VCF, selected with a
switch.
In the VCO mode, there are further selections of 3 ranges: SEMI - WHOLE - QUINT.
Setting the slide switch on VCF, the starting tone color of the bender effect can be changed by moving the CUT
OFF FREQ. control in the VCF section.
3-2. CONTROL UNIT ASSEMBLY CU-1
Subdivided as follows:
1) CIRCUIT BOARD ASSEMBLY OP-19
2) VCO BOARD ASSEMBLY VO-3
3) CIRCUIT BOARD ASSEMBLY OP-20
4) MIXER BOARD ASSEMBLY OP-23
5) CIRCUIT BOARD ASSEMBLY OP-21
6) CIRCUIT BOARD ASSEMBLY OP-22
Scan by Manual Manor
http://www.markglinsky.com/ManualManor.html