Sony MHC-5500 - Page 24

TC-HSOO
2. Turn the adjustment screw for the maximum output
levels. If these levels do not match, turn the adjustment
Screw
position
L-<::H peak
-- Screw
angle
3. Phase Check
Mode : playback
4.
5.
test tape
P-4-Al00
(lOkHz, - lOdB) L-<::H
set
R-<::H
oscilloscope
47k Q
~
LINE OUT
Screen pattern
In phas 45°
90° 135° 180°
good
wrang
Set in the REV mode and repect the step 1-3.
After the adjustment, lock the screws with locking
compound.
Adjustment Location : Record/Playback head
(Adjustable without disassembly.)
FWD
REV
Adjustment screw
FWD REV
Tape Speed Adjustment jDECK Aj !DECK BI
Procedure :
Mode : FWD playback
test lape
WS-48B
(3kHz, 0dB)
frequency counter
LINE OUT
Perform high speed adjustment before normal speed
adjustment.
Connect TPl to ground with jumper wire and continue to
press HIGH SPEED DUBING switch : High speed playback.
After the high speed adjustment, remove jumper wire of
TPl.
Play back the test tape WS-48B and ajust to meet the
specifications below.
Adjustment
variable
S805 frequency
speed
deck resistor
of
High Speed
countor
Part
motor
dubbing reading
A
MllA
(H)
high
ON
5,960±20Hz
B
MllB
(H)
A MllA
(L)
normal
(L)
OFF 2,980±10Hz
B MllB
Frequency difference between the beginning and the end
of the tape should be within 3%.
Frequency difference between deck A and deck B the
beginning of the tape should be within 1.5%.
Adjustment Locatlon :
deck A: motor (Ml lA) rear side
deck B : motor (M 1 lB) rear side
Playback Level Adjustment I DECK A 1 1 DECK B 1
Procedure:
Mode : playback
Connect TPl to ground.
test tape
P-4·L300
(315kHz,
OdB)
sel
Adjust deck A: RV41A(L-CH), RV61A(R-CH) and deck B:
RV41B(L-CH) , RV61B(R-CH) so that the reading on VTVM
meets the specification below.
LINE OUT level: -10±0.5dB (0.23 to 0.26V)
Level difference between channels : less than 0.5dB
ChP.ck
that the LINE OUT level does not change in playback
mode while changing the mode from playback to stop several
times.
Adjustment Location : MD board
-4-
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