Akai GXC 710 D Service Manual

Page 2

STEREO CASSETTE DECK

MODEL GXC-7 1 0D
SECTION 1 SERVTCE MANUAL ..................... 1
SECTION 2 PARTS LIST ......................... 19

SECTION 3 SCHEMATIC DIAGRAM .................. 40

Page 13

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Fig. 10 Power Supply & OSC P.C Board CA-5015

RECORDING/PLAYBACK LEVEL ADJUSTMENT

Test Tape Adjustment
Step Adjustment Item Mode Result Remarks
Supply Signal Point
' 33 H V VRl, 1 kB
Playback Level 3 ZD U PLAY 0 :15 dBm
Adjustment Test lupe CA-SOH
Recording Level Low Noise Blank REC VR4, 20 kB Sci Tape
2 Adjustment Tape 1,000 Hz 0 VU and 05,5017 0 12 dBm Selector to
(low noise tape) recording PLAY LOW NOISE
Recording Level Chromium Dioxode REC Set Tape
3 Adjustment Blank Tape 1,000 Hz and -3 11.5 dBm Selector to
(chrome tape) 0 VU recording PLAY CHROME
1 F no L IN ' B] k to tf >~
:51 y "T 01'850011" REC VRl, 300 kB requgmy Deviation
one e , 2 es . r
4 = ,eSp L 3" . and VRZ, 300 kB I pom mm :15 dB
., 1' Adjustment 10,000 Hz -20VU 1.000 Hz to
. _ . PLAY CA-5015 (See Note 5)
(low noise tape) recording 10,000 Hz
NOTE: 1) Set output volume to maximum position. Chart-1

2) Set Dolby Noise Reduction switch to OFF.
3) Use only new tape as level variation is likely to occur when using old tape.
4) Set tape selector switch to LOW NOISE except in Step 3.

5) Following frequency response adjustment, check to confirm that recording/playback

level is the same. If levels differ, carry out Step 2 adjustment again.