3502A11(N)
i
2-4. AUDIO CIRCUIT ADJUSTMENT... Applies to “SP/LP tape speed models” (ex. VHR-235E...) only.
“
Unless otherwise specified, all test point and adjustment location on the CP- 1 board.
E
No, Item
1
BIAS
LEVEL
2-5, TUNER IF
Input
Mode Point Location Remark
1.Set the channel selector buttons to the AV
No-signal REC
TP201 (HOT)
VR201
position and place in the SP record mode
TP202 (GND) without a signal.
2. Adjust VR201 so that the level is 23 mVrms.
:IRCUIT ADJUSTMENT
“ There are two of the VIF unit’s type and different with the model as shown in figure below.
—
do
—
1
—
Item
RF AGC
Input
Tv
broadcast
Mode
E-E
Point
TV screen
VR611 a
RFAGC
B
Ic
611
Location
VR611
(VIF unit)
WPE A
CP-1 board
/
~
Remark
I
1.
2.
Receive the middle electrical field (60 dB - I
80 dB) of the TV channel, and slowly turn
-“
VR611 from the point where snow-noise is
present to the point where itjust disappears
from the monitor TV.
Confirm by monitor TV that there is no beat
and saturation (S/N is best point) when re-
ceiving any TV channel.
VR611
RF AGC
CP-1 board
TYPE B
Fig. 2-6-1 VIF unit (Partsside view)
J
—7—
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