APPLICABLE TO ERISSON 2515[25A9ABN87(B)] - 2915[29A9ABN87(B)] - 21F1[21A8BN87(A)] - 2102[21A9BN37(B)]
SCHEMATIC DIAGRAM [ICs USED _ AN5539 – TA1216AN – MC4052 – MN5099K – KS88C8424 – 24C08 – LA7952]
CLICK ON THE SCHEMATIC TO ZOOM IN
+B Voltage adjustment1) Receive standard colour bar signal.
2) Press key "I.P.C." to select “Natural” mode.
3) Connect digital voltmeter between [+] of C403 (For 21A8/25A9/29A9) or C416 (For 21A9) and GND.
4) +B voltage.
Adjust VR901 to make the read-out on the Voltmeter to be +B±0.3V.