Tuner Section; Fm Tuner Section; Am Tuner Section - Pioneer HTZ-7 VisionPlus Service Manual

HTZ-7, HTZ-C7, HTZ-SW7

6.2 TUNER SECTION

6.2.1 FM TUNER SECTION

Set the mode selector to FM BAND.
Connect the wiring as shown in Fig. 1.
Adjustment
Step No.
Title
Front End
1
Sensitivity
TUNED IND.
2
Lighting Level
Note: Before adjusting, make sure there is no gap between L6401 and L6402. If there is a gap between them, bring them into contact with
each other first, and then make adjustments.

6.2.2 AM TUNER SECTION

Set the mode selector to AM BAND.
Connect the wiring as shown in Fig. 1.
Adjustment
Step No.
Title
Front End
1
Sensitivity
1: For the area using 10 kHz step, frequencies should be 1000 kHz.
AM SG
MPX SG
FM/AM TUNER MODULE
AM
Antenna
Terminal
FM
Antenna
Terminal
98
FM SG (1kHz, ±75kHz dev.) Reception
Frequency Level
(MHz) (dB V)
98 0 – 30
98
18 ± 2
AM SG (400Hz, 30% Mod.)
Frequency Level
(kHz) (dB V/m)
999* 1 35 – 45
60cm
Center Center
FM SG
FM75 antenna terminal
Fig. 1 AM and FM Adjustment Wiring Diagram
SIDE A
YELLOW BLACK
AXX7041
L6401
Fig. 2
Adjustment
Frequency
Location
Display
L6402 Adjust so that the DC voltage between the IC6201-
98 MHz
Pin 20 and GND becomes at maximum level.
T6401
Adjust so that the indicator of TUNED IND. starts to
98 MHz
VR6201
light up.
Reception
Adjustment
Frequency
Location
Display
Adjust so that the DC voltage between the IC6201-
999 kHz* 1 T6201
Pin 20 and GND becomes at maximum level.
Loop Antenna
AM antenna terminal
PRODUCT
T6401
Adjustment Points
Specifications
Specifications
DC
Voltmeter
T6201
IC6201
Pin 20
VR6201