This is the 89 pages manual for Akai AM M5 M7 Service Manual.
Read or download the pdf for free.
If you want to contribute, please mail your pdfs to info@audioservicemanuals.com.
/\t
7-4. FM SECTION ADJUSTMENT (Refer to Figs. 7-2, 3)
' Adjustment T Adjustment Test l '
:tfp Item Point Point Rm“ Remarks
FM Tuning Selector to FM, Display to
1 Voltage L4 TP4 3.0V 88MHZ, Digital Volt Meter
(Low) Between TP4 & GND.
FM Tuning
2 Voltage VC4 TP4 20V Display to 108MHz
(High)
Mode to Mono. 88MHz, lkHz
3 EX??? ”5’ 3 Output Less than 6dB (Mono, 100%) Input, 3%
s 1 y DISTORTION FACTOR
I 108MHz, lkl-lz (Mono, 100%)
4 £16335? VC1, 2, 3 Output Less than 6dB Input, 3% DISTORTION
ensi 1V1 y FACTOR
Center Tuning Meter Between
FM Center TP7 Centered TP7 & TPS, (see NOTE l)
5 V lt T2 TPS Tuning Meter Tunes only noise Without
0 age Indication interference from Broadcast-
ing
Distortion ' 98Ml-lz, 60dB, lkHz (Mono,
6 Factor T3 Output Less than 0.3% 100%) Input
pg
7 Féee Runmng VRZ TP9 l9kHziSOHz 98MHZ Non-Modulation Sig—
quuency n 31 Input
98MHz, 60dB, lkHz (Stereo,
Stereo 100%) LCH (RCH) Input,
8 Separation VR} Output More than 40dB RCH (LCH) output to Mini—
Q mum
NOTE: 1. The center tuning meter such as the ones used on model AA-RZO, 30, 40, 50>& AT-2400, 2600 can be
used for this adjustment.
If it is not available, use a digital meter (DC VOLTAGE, RANGE 20V) instead, and adjust T2 so that
it indicates 0V at the same condition.
2. For the best result, repeat step 1 through 8 for two or three times.
SERVICE MANUAL AT-MS / L
21
2—3. OPERATION OF AMPLIFIER SECTION CONTROL IC AA-l 00 PERIPHERAL CIRCUIT
2-3-1. Display Data V
2-3-2. Digit Output of AA-100
2-3-3. Description of Input Selector
1) FUNCTION SWITCHING
2) TAPE MONITOR SWITCHING
2-3-4. Operation of Electronic Volume Control and Tone Control
1) OPERATION OF VOLUME CONTROL
2) SERIAL TRANSFER DATA
2-36. Composition of Volume IC TC9154P and Tune Control (Bass Treble) lC TC9156P
1) INTERNAL BLOCK DIAGRAM _ L
2) ATTENUATOR OF TC9154P
3) INTERNAL BLOCK DIAGRAM OF TC9156P (BASS TREBLE)
4) VARIABLE RESISTOR 0F TC9156P
S) OPERATION
6) UP/DOWN OPERATION OF VOLUME CONTROL
8) UP/DOWN OPERATION OF BASS AND TREBLE
9) BALANCE CONTROL
10) OPERATION OF FADER
23—6. The Status that will be Established When Reset Button is Pressed
2—3-7. Reset Status when Power is on
2-3-8. How to make Letters
*For the description of the above circuit which is identical to Model AA-R22/32/42, see the service manual for AA-22/
32/42.
SERVICE MAN UAL‘AT-MS /L
31
II. DISMANTLING OF UNIT
In case of trouble, etc. necessitating dismantling, please
dismantle in the order shown in the phogographs.
Reassemble in reverse order.
SCREWS
SCREWS
b
‘ FRONT PANEL
SCREWS
UPPER COVER
38
SERVICE MANUAL AM-M5 /M7