Interm h 4200 pwramp
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Extracted text from interm h 4200 pwramp (Ocr-read)
Page 1
SERVICE
MANUAL
AMPLIFIER
1-1-4200
InterM
Page 2
I REQUIRED TEST EQUIPMENT
1. Oscilloscope
2. 1kHz audio sine wave generator
3. Digital multimeter
4. 2-ohm resistive load (rated for at least 1200W)
I IDLE CURRENT(H-3200/4200)
1. Setting
set the master volume controls minimum
2. Connection
(5
.1113
Gt @=-°*=fi__o
.0
_°"='L_o
.0
VOLT METER
(DIGITAL or AMLom
\
\
VOLT METER
(mm. or Amoet)
3. Adjustment
While measuring the DC voltage across resistor R217 or R218
adjust VR 100 and VR 100, range as shown below.
Model DC voltage range
Adjust
-3200/420 80mV~ 120mV
Channel 1 : DC voltage across R217(3Q/2W) or R218(30/2W), adjust VRlOO
Channel 2 : DC voltage across R217(3Q/2W) or R218(3Q/2W), adjust VRlOO