Electrical Adjustment - Sony D-EJ2000 Service Manual

D-EJ2000
Adjustment of VCPU
Connection :
• DC 3 V in DC IN jack (J402)
MAIN board
TP (VCPU)
TP402 (GND)
Procedure :
1. Connect a digital voltmeter to the test points TP (VCPU) and
TP402 (GND).
2. Supply DC 3 V in DC IN jack (J402).
3. Adjust the RV401 so that the reading of the digital voltmeter
becomes 1.9V+0.05/-0.0V.
• Adjustment value : VCPU = 1.9V
Connecting points and adjusting point :
– MAIN board (Side A) –
R412
R411
L405
C451
RV401
C417
C407
L409
TP (VCPU)
L411
R421
R420
L401
Q403
Q409
C416
R456
C454
R404
– MAIN board (Side B) –
TP402
(GND)
10
SECTION 4

ELECTRICAL ADJUSTMENT

Digital Voltmeter
+
–
+ 0.05
V (1.90V to 1.95V)
– 0.0