KENWOOD KT-727(4) Service Manual

全国30人のKT-727ファンに送る？KT-727の調整方法です。まあ、以前から「ひろくん」さんのページに載っているのですが、KENWOOD謹製サービスマニュアルもいいものでしょ？
注意することは、FM Section No.7でVCO調整時、TP6に直接周波数カウンタを繋いではいけません。220kΩを直列に入れてください。
Insert 220k ohm between frequency counter probe and TP6 when you alignments VCO free run(FM section 7).
海外モデル用なので周波数などは適宜読み替えます（後述）

KENWOOD KT-727 Service Manual

No.	ITEM	INPUT SETTINGS	OUTPUT SETTINGS	TUNER SETTINGS	ALIGNMENT POINTS	ALIGN for	FIG.
FM SECTION Unless otherwise specified, the individual switches should be set as following: SELECTER: FM, TUNING: MANUAL, MUTING: OFF
1	BAND EDGE(1)	-	Connect a DC voltmeter between TP1 and TP2.	87.5MHz	L7	7.5V	(a)
2	BAND EDGE(2)	-	Connect a DC voltmeter between TP1 and TP2.	108.0MHz	TC5	25.0V	(a)
Repeat alignments 1 and 2 several times.
3	DETECTOR	(A)98.0MHz 0dev 100dB (ANT input)	Connect a DC voltmeter between TP3 and TP4.	98.0MHz	L9	Confirm that voltage changes to both + and - direction. Then adjust to 0V.	(b)
4	RF ALIGNMENT(1)	(A)90.0MHz 1kHz,±75kHz dev	(B)	90.0MHz	L1,2,3,5	Maximum amplitude and symmetry of the oscilloscope display.
5	RF ALIGNMENT(2)	(A)106.0MHz 1kHz,±75kHz dev	(B)	106.0MHz	TC1,2,3	Maximum amplitude and symmetry of the oscilloscope display.
Repeat alignments 4 and 5 several times.
6	TUNING LED	(A)98.0MHz 0dev 10dB(ANT input)	TUNING LED	98.0MHz	VR1	Adjust VR1 so that TUNING LED goes off. Then, adjust VR1 and stop at the point where TUNING LED goes on.
7	VCO	(A)98.0MHz 0dev 60dB(ANT input)	Connect frequency counter to TP6 via an AC voltmeter.	98.0MHz	VR8	76.00kHz	(c)
8	STEREO SUB	(C)98.0MHz 1kHz,±68.25kHz dev Selector:SUB, Pilot:±6.75dev 60dB(ANT input)	(B)	98.0MHz	L14	Maximum output.
9	DISTORTION(1)	(A)98.0MHz 1kHz,±75kHz dev 80dB(ANT input)	(B)	98.0MHz	VR2	Minimum distortion.
10	DISTORTION(2)	(C)98.0MHz 1kHz,±68.25kHz dev Selector:L, Pilot:±6.75dev 80dB(ANT input)	(B)	98.0MHz	L5	Minimum distortion.
11	SEPARATION(1)	(C)98.0MHz 1kHz,±68.25kHz dev Selector:L, Pilot:±6.75dev 80dB(ANT input)	(B)	98.0MHz	VR10	Minimum crosstalk.
12	SEPARATION(2)	(C)98.0MHz 1kHz,±68.25kHz dev Selector:R, Pilot:±6.75dev 80dB(ANT input)	(B)	98.0MHz	VR9	Minimum crosstalk.
Repeat alignments 11 and 12 several times.
AM SECTION Keep the AM loop antenna installed. SELECTER: AM, AM IF BAND: WIDE
1	BAND EDGE(1)	-	Connect a DC voltmeter between TP1 and TP2.	530kHz(531kHz)	L18	2.5V	(a)
2	BAND EDGE(2)	-	Connect a DC voltmeter between TP1 and TP2.	1600kHz(1602kHz)	TC7	20.0V	(a)
Repeat alignments 1 and 2 several times.
3	RF ALIGNMENT(1)	(D)630kHz 400Hz,30% mod	(B)	AM IF BAND: NARROW 630kHz	L17,19	Maximum amplitude and symmetry of the oscilloscope display.
4	RF ALIGNMENT(2)	(D)1440kHz 400Hz,30% mod	(B)	AM IF BAND: NARROW 1440kHz	TC6	Maximum amplitude and symmetry of the oscilloscope display.
Repeat alignments 3 and 4 several times.

For adjustments of KT-727L

KT-727	KT-727L
75kHz dev	40kHz dev
68.25kHz dev	40kHz dev
6.75kHz dev	6kHz dev
530kHz	153kHz
1600kHz	281kHz
630kHz	173kHz
1440kHz	250kHz

For Japanese model

87.5MHz	76MHz
108MHz	90MHz
98MHz	83MHz
±75kHz dev	100% mod