Adjustments - Sony Walkman PCM-M1 Service Manual

3-1.

ADJUSTMENTS

Notes on Adjustment
1. Perform adjustments in the order given.
2. Use the following test tapes.
TY-7111 (8-909-812-00) For playback level adjustment
TY-7915 (8-913-932-00) For tape pass and switching pulse adjustments
TY-30B (8-892-358-00) Blank tape
Use the following torque meter.
TW-7131 (8-909-708-71) For tension adjustment
3. Switch and knob positions
As indicated in the adjustment procedures.
SP/LP: SP 48kHz
REC LEVEL : MIC LIMITER
MIC/LINE IN : MIC
MIC ATT : 0dB
AVLS : NORM
4. Apply DC 4.5 V power to the DC IN jack.
5. For rotary head drum cleaning, press a piece of chamois leather (2-034-697-00) or a four-times folded clean knit fabric moistened with
small amount of alcohol against the drum lightly, and rotate the drum in counter-clockwise direction. (Rotate a few times.)
Test mode
1. Perform the adjustments in test mode.
2. How to enter the test mode.
Press the STOP key, COUNTER key and OPEN button simultaneously when the main power is ON, to enter the test mode. Turn off the
main power to exit the test mode.
3. When the machine enters the test mode, back light of the LCD turns on and the following initial display appears.
At the same time, the mechanism starts loading, and display of the select test mode code segment of the LCD turns on. (It normally
flashes.)
Initial display of LCD
00
REMAIN
1 40 40
Note: The respective keys can be operated during test mode. The machine can mis-operate when the keys are operated during test most.
However, mis-operation of the machine can be cleared by pressing the STOP key. At the same time, tape will not be damaged by mis-
operation.
SECTION 3
ADJUSTMENTS
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