Technics SU-VX620 Service Manual

SU-VX620
SU-VX620
sor P.C.B.
sor P.C.B.
OLT ADJ.
former
ria
Removal
of
the
main
P.C.B.
Procedure
1—2—9—11—
12—14—-16
CN702A/
CN702B
1. Remove the 1 flat cable (CN702A/CN702B).
2. Remove the 8 screws (@~®@).
pera
Removal
of
the
powe
eva
Check
of
the
main
P.C.B.
Procedure Procedure
1—-2—9—11— : 1—2—18
12— 14-16-17 R
Rear panel
1. Unsolder the power IC.
2. Remove the 2 screws (@, @).
When mounting the power IC and heat sink, apply silicon
thermal compound (RFKX0002 or equivalent) to rear of the
power IC. 1. Remove the 4 screws (Q@~Q).
Remote switch
controller ~
Main PCB.
3. Remove the main P.C.B. in the direction of arrow.
Front panel ass’y
3. Remove the bottom board ass’y.
4. Reinstall the front panel ass’y to the main P.C.B. and place
the unit as shown right.
5. Reinstall the remote switch controller to the switch.
2. Remove the 9 screws (@~®).
SU-VX620
eREPLACEMENT OF THE FOOT
1. Remove the 4 heat melted posts on the bottom board ass’y with a pair of Heat Melted Posts
nippers or similar tool.
2. To replace the foot (RKA0053-A) on the bottom board ass’y, melt the
4 posts with a soldering iron.
Foot
: Soldering Iron
Bottom Board Ass’y
Poe
Foot
m MEASUREMENTS AND ADJUSTMENTS
e ADJUSTMENT
Control positions and equipment used.
eVolume knob .............. x (Minimum)
eSpeaker selector .......... OFF
DC electronic voltmeter (EVM)
eVOLTAGE CONTROL (V) AMP. IDLING (ICQ)
ADJUSTMENT
1. Test equipment connection is shown in figure. (Connect the DC
EVM on both channels.)
2. Completely turn the (V) amp. adjusting volumes (VR451, VR452)
counter-clockwise.
3. Turn on the set when itis cold, and about 8 sec. later, adjust
VR451 and VR452 so that the voltage is 100410 mV.
e ADJUSTMENT POINTS
| 7
iTP451(V-amp.)i
=44-=
TP451(V-amp,)
|
|
|
|
|
|
!
I
|
!
|
|
|
(RKA0053-A)

Technics SU-VX620 Specifications

General

Brand	Technics
Model	SU-VX620
Category	Amplifier
Language	English