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Adjustment Procedures
Adjustment purpose
Set the reference frequency for the SAP detection circuit.
[Multi Channel Sound Circuit]
1. SAP VCO
Measuring
instrument
Test point
EXT trigger
Measurement
range
Input signal
input terminal | RF IN terminal
Symptom when
No reception of SAP broadcasting.
incorrectly adjusted
Frequency counter
TPM2
RF signal
(monaural sound)
PCB-SIGNAL(COMPONENT SIDE)
TU101
12 eTPM2
Ba )_jIc3e1
©
e@ oRJ
TPM1
i
1. Supply an RF signal (monaural sound 400Hz 100%MOD).
2. Connect TPM1 (pin @ of connector Ru) to ground.
3. Connect pin © of IC3E1 (pin @ of connector RJ) to ground through a resistor
(820kW, 1/4W).
4. Observe the frequency at TPM2 (pin © of connector RG).
5. Press the "MENU" button on a remote hand unit.
6. Press the buttons "2", "3", "5" and "7" in that order.
(The screen will change to the circuit adjustment mode.)
7. Set the function to "MCS". ("AUDIO" button)
8. Set the items shown in the list below to the data value.
('VIDEO" and "ADJUST" buttons)
9. Select item "O PVC". ("VIDEO" button)
10. Set the data so that the frequency is 78.67+0.40kHz.("ADJUST" button)
11. Write the data into memory. (Press "ENTER")
12. Terminate the circuit adjustment mode. (Press "MENU" twice)
Note: Adjustment 2 (Stereo VCO) must be performed immediately after this
adjustment.
Abbreviated
Name
-2inp_ [32 |
P~3rk
| 63
Paisp__| a2
[—srise__|
33 |
[Multi Channel Sound Circuit]
| Adjustment purpose
Set the reference frequency for the multiplex IC oscillator.
2. Stereo VCO
Symptom when
No STEREO reception.
incorrectly adjusted
Measuring
instrument
Test point
EXT trigger
Measurement
range
Input signal
Input terminal
Frequency counter
TPM2
RF signal
(monaural sound)
PF IN terminal
PCB-SIGNAL(COMPONENT SIDE)
TU101
Le eTPM2
RG
a
®
mie ORJ
TPM1
5
* This adjustment must follow adjustment 1 (SAP VCO).
1. Refer to the steps 1 through 7 in adjustment 1 (SAP VCO) for the connection
and setting of measuring instruments, etc.
2. Select item "1 TVC". ("VIDEO" button)
3. Set the data so the frequency is 15.73+0.08kHz. ("ADJUST" button)
4. Write the data into memory. (Press "ENTER")
5. Terminate the circuit adjustment mode. (Press "MENU" twice)
6. Remove the resistor from pin ® of IC3E1.
7. Open circuit TPM1 and ground.
Note: Adjustment 3 (Input Level) must be performed immediately after this
adjustment.
,
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