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This manual is all I need to check and repair my equipment. Thank you....
;
This manual is all I need to check and repair my equipment. Thank you....
;
this manual make me repair my vintage radio with easily.
Thank you for your best service
sukpra
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A good manual. Had everything i needed to make the repair.
;
This manual is a complete guide, including later additions. It has all the necessary information about the replacement items. The material quality is great to read.
PD-117
11. Focus Best Adjustment
Adjust this point only if adjustment was made in item 10.
Test mode SPDL servo = CLOSE FOCUS servo = CLOSE TRKG servo = CLOSE
TEST DISC
MAX
Innermost circumference PLAY (1 TRK)
VR156
MOTHER BOARD ASSY Adjust the RF level to maximum, with the focus error voltage within ±150mV.
Oscilloscope
GND
START
GND
TP1 (CN201)
FE RF VC
Player
DC Mode CH1: 5mV/div CH2: 20mV/div H: 200ns/div Prove (10:1)
6 1 4
MOTHER BOARD ASSY
12. Tracking Servo Loop Gain Adjustment
UNDER Test mode SPDL servo = CLOSE FOCUS servo = CLOSE TRKG servo = CLOSE
TEST DISC
GND GND
Prove (10:1)
UPPER
Innermost circumference PLAY (1 TRK)
JUST
VR151
MOTHER BOARD ASSY Lissajous Waveform
Oscilloscope
X-Y Mode X: 20mV/div Y: 10mV/div
START
TP1 (CN201)
TE TI VC
Player
Prove (10:1)
Low-frequency oscillator
1.2kHz 1Vp-p
Prove (10:1)
2 3 4
100k� GND
MOTHER BOARD ASSY
24
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