Interm a 60 120 amp
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Extracted text from interm a 60 120 amp (Ocr-read)
Page 1
SERVICE
MANUAL
PUBLIC ADDRESS
AMPLIFIER
A-60/ 120
mterM InterM
NO 00000000000
Page 2
CONTENTS
Electrical Adjustment Procedure
Specifications - - -
Electrical Parts List -
Top and Bottom View of PC. Board
Wiring Diagram -
Block Diagram
Schematic Diagram .
Exploded View of Cabinet & Chassis / Mechanical Parts List
Ass y Drawing . .
\lmUIOONA
J:
-8,9
40,11
-12,13
ELECTRICA ADJUSTMENT PROCEDURE
I AMP SECTION
1. OFF SET VOLTAGE
A. Setting
Set the master volume control minimum.
B. Connection
O
o-I:
IDLE VR10
-o
OFFSET VOLT METER
: CHASSIS
MAIN PCB (4005181100)
C. Adjustment
Control OFFSET until voltmeter is the 0 position. (at Output Terminal)
2. IDLE CURRENT
A. Setting
Set the master volume control minimum.
B. Connection
R56 R58 b
-'Wv- 0
R57 R59
w- -wV-
@ VOLT METER
IDLE VR11
MAIN BD (4005181100)
C. Adjustment
A-60: Adjust VR11 so that the current through the R56 and R58 become 10 milliampere. When that
voltage is 10 millivolt, the current becomes 10 milliampere.
A-120: Adjust VR11 so that the current through the R56 and R58 become 5 milliampere. When that
voltage is 5 millivolt, the current becomes 10 milliampere.