Sony TC-WR545 Service Manual page 7

3. Playback Mode
test tape
P-4-A100
(10kHz, — 10dB)
oscilloscope
nphase 45° rT j
good
4, Change the reveres playback mode and repeat the steps 1 to 3.
5. After the adjustment, lock the adjustment screws with suitable
locking compound.
Adjustment Location : — record/playback head —
reverse side forward side
adjustment screws
Tape Speed Adjustment
Procedure :
— Forward Playback Mode —
test tape
WS-48B
(3kHz, OaB)
LINE OUT
(high speed adjustment)
1. Connect @ pin of IC801 to ground.
2. Set to FWD playback mode.
3. Keep on pressing the HIGH SPEED DUBBING switch.
4. Adjust RV72 so that the frequency counter reading becomes
6,000 + 20Hz.
(normal speed adjustment)
1. Set to FWD playback mode.
2. Adjust RV71 so that the frequency counter reeding becomes
3,000 + 10Hz.
Frequency difference between the beginning and the end of the tape
should be within 3%.
Frequency difference between the deck A and deck B the beginning
of the tape should be within 1.5%.
Adjustment Location : AUDIO board
Playback Level Adjustment
Procedure :
— Forward Playback Mode —
test tape
P-4-L300
(315Hz, 0dB)
LINE OUT
Adjust RV11(L-CH) and RV21(R-CH) so the VITVM reading
becomes the adjustment limits below.
Adjustment Value :
LINE OUT level : — 7.7 = 0.5dB (0.301 to 0.338V)
Level difference between channels : within 0.5dB
Confirm the LINE OUT level does not change in playback mode
while changing the mode from playback to stop several times.
Adjustment Location : AUDIO board