!™
Screw (M4)
!£
Cover
!¡
Screw (M4)
5
Three screws
(BTP3x8)
7
Side plate (L)
!•
Screw (BTP3x12)
!¶
CNP710 (10P)
@™
CNP803 (3P)
@£
CNP708 (2P)
SECTION 3
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
3-1. SIDE PLATE,SUB 1/SUB 2 AND FILTER BOARD
3-2. AMPLIFIER/POWER BOARD AND LED BOARD
SECTION 4
ELECTRICAL ADJUSTMENT
IDLING CURRENT ADJUSTMENT
• Perform adjustments in the HI-VOLTAGE mode.
1Adjustment point
Semi-fixed resistors VR101, VR201, VR301, VR401, VR501,
VR502 of amplifier board
2Precautions on adjustments
1. Set the RCA input terminal to open.
2. Apply a voltage of 14.4V between the +12V terminal, REMOTE
terminal, and GND terminal.
3. Rotate the above semi-fixed resistors completely in the counter-
clockwise direction while observing the component side.
4. Check that the voltage at the adjustment point becomes 0 mV in
step 2.
5. Fine adjustments may be required according to the characteris-
tics of the MOS-FET used.
• When adjusting the idling current
Rotating the semi-fixed resistor in the clockwise direction:
Increases the idling current
Rotating the semi-fixed resistor in the counterclockwise direction:
Decreases the idling current
*Take note that rotating excessively in the clockwise direction
will increase the idling current suddenly.
3Approximate adjustment values
Adjust as follows so that the following voltages become
1.2 to 0.3 mV around 0.7 mV .
FL channel :
Voltage betweenTP7 andTP6: UseVR101of theamplifier board
FR channel :
Voltage betweenTP7 andTP5: UseVR201of theamplifier board
RL channel :
Voltage betweenTP7 andTP4: UseVR301of theamplifier board
RR channel :
Voltage betweenTP7 andTP3: UseVR401of theamplifier board
SUBWOOFER Channels :
First, adjust so that the voltage between TP1 and TP2 becomes
1.2 to 0.3 mV around 0.7 mV using VR501 of the amplifier
board.
Next, adjust so that the voltage between TP1 and TP2 becomes
2.4 to 0.6 mV around 1.4 mV using VR502 of the amplifier
board.”
Connection :
TP7
TP1 TP6
TP5
TP4
TP3
TP2
TP1
(FL-CH)
(FR-CH)
(RL-CH)
(RR-CH)
(SUB WOOFER)
(SUB WOOFER)
(SUB WOOFER)
Digital voltmeter
JW230
JW307
VR502
TP3
TP4TP5
TP6
TP7
TP1
TP2
VR501
VR401
VR301
VR201
VR101
Adjustment Location
– AMPLIFIER BOARD – (Component side)
