Sony D-NF007, Service Manual

6

D-NF007/NF0070

SECTION 4

ELECTRICAL ADJUSTMENTS

[TUNER SECTION]
CLOCK SHIFT  ADJUSTMENT

Connection:

Adjusting Procedure:

1. Connect the frequency counter to TP471 (SIFT) and TP005

(RFGND (A)) or TP003 (RFGND (B)) on the MAIN board.

2. Set the AM 621 kHz (9kHz step model) or AM 620 kHz

(10kHz step model)

3. Adjust the RV471 so that the reading of frequency counter is

180 

±

 1 kHz.

0 dB=1 

µ

V

[AM]

Setting:

Function: RADIO
Band: AM
AVLS: OFF

[FM]

Setting:

Function: RADIO
Band: FM
AVLS: OFF

•

Repeat the procedures in each adjustment several times, and
the tracking adjustments should be finally done by the trimmer
capacitors.

+
–

frequency counter 

TP471 (SIFT)

TP005 (RFGND (A)) or

TP003 (RFGND (B))

MAIN board

AM RF signal 

generator

30% amplitude
modulation by
400 Hz signal
Output level: 
as low as possible

Put the lead-wire
antenna close to 
the set.

+
–

level meter 

set

32 

Ω

MAIN board

TP005 (RFGND (A)) or

TP003 (RFGND (B))

MAIN board

TP012 (TU_L) or

TP014 (TU_R)

FM RF signal

generator

33.75 kHz frequency
deviation by 1 kHz
signal
Output level: 
as low as possible

+
–

level meter

set

32 

Ω

0.01 

µ

F

MAIN board

TP002 (RF (A)) or

TP001 (RF (B)) 

MAIN board

TP005 (RFGND (A)) or

TP003 (RFGND (B))

MAIN board

TP005 (RFGND (A)) or 

TP003 (RFGND (B))

MAIN board

TP012 (TU_L) or

TP014 (TU_R)

digital voltmeter 

TP006 (VT)

TP005 (RFGND (A)) or

TP003 (RFGND (B))

100 k

Ω

MAIN board

(     ): 9kHz step model

AM IF ADJUSTMENT

Adjust for a maximum reading on level meter

T002

620 (621) kHz

(     ): 9kHz step model

AM FREQUENCY COVERAGE CONFIRMATION

Adjustment Part

Frequency Display

Reading in Digital Voltmeter

Confirmation

530 (531) kHz

0.8 

±

 0.5 V

Confirmation

1,710 (1,602) kHz

7.2 (6.8) 

±

 1.0 V

(     ): 9kHz step model

AM TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter

T001

620 (621) kHz

CT001

1,400 (1,404) kHz

FM FREQUENCY COVERAGE ADJUSTMENT

Adjustment Part

Frequency Display

Reading in Digital Voltmeter

Confirmation

87.5 MHz

2.8 

±

 1.0 V

L004

108 MHz

8.0 

±

 1.0 V

FM TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter

L003

98 MHz

Adjustment and Connecting Location: 

MAIN board

    (See page 7)

Ver. 1.1

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