Dc Offset Voltage Adjustment; Idling Current Adjustment; Controls Setting - Marantz PM4001 Service Manual

2. DC OFFSET VOLTAGE ADJUSTMENT

CONTROLS SETTING :

TONE(BASS & TREBLE) : MID POSITION
BALANCE
VOLUME
LOUDNESS
TONE DEFEAT
SPEAKER 1, 2
ADJUST MESURED ACROSS VOLTMETER READING
VR33 SPEAKER OUT (L-CH)
VR34 SPEAKER OUT(R-CH)
INPUT & AMPLIFIER PWB (CUP11833-1)
: MID POSITION
: MINIMUM POSITION
: OFF POSITION
: OFF POSITION
: ON POSITION
+- 50mV
+- 50mV

3. IDLING CURRENT ADJUSTMENT

After DC Offset Voltage Adjustment is completed, adjust the
Idling Current with the variable resistor VR31and VR32 on
the PWB.
CONTROLS SETTING :
TONE(BASS & TREBLE) : MID POSITION
BALANCE
VOLUME
LOUDNESS
TONE DEFEAT
ADJUST MESURED ACROSS VOLTMETER READING
VR31 CN37
VR32 CN38
INPUT & AMPLIFIER PWB (CUP11833-1)
2
: MID POSITION
: MINIMUM POSITION
: OFF POSITION
: OFF POSITION
5mV
5mV