Zenith Z-100 Series Service Manual

H/Z-100 Service BulletinsH/Z-100 Field Service Bulletins General Notes: -- The following article appeared as an insert to issue #42, November-Decembe

H/Z-100 Service Bulletins1045 and HE 443-1075. Cross out part number HE 443-1075. FSB-Z100-030: Z-207 Manual Correction; Transistor (Q2 and Q3) Mark

H/Z-100 Service Bulletins To configure the Winchester disk drive, select the proper hardware unit and refer to the table below: Hardware Unit NumberPi

H/Z-100 Service Bulletins FSB-Z100-035: Z-205 Configuration Help In order to help clear up some misunderstandings about the Z-205, the following info

H/Z-100 Service Bulletins4 --* 4 *--5 --* 5 --*6 --* 6 --*7 --* 7 *--OFF /ON OFF /ONHex 9 9Binary 1001 1001SW1 positions: 7654 3210 The third Z-205 c

H/Z-100 Service Bulletins- Page 11: Under SW1, the example shown is not representative of proper configuration necessary for the Z-100. - Page 15: The

H/Z-100 Service Bulletins FSB-Z100-039: Schematic Corrections - U130 Please make the following changes to schematic MB3 in your Z-100 Interim Service

H/Z-100 Service BulletinsIf the pulse width at CP3 cannot be adjusted, or is missing, check for an open circuit to U3-17 or an open wiper at R3. FSB

H/Z-100 Service BulletinsFSB-Z100-047: CP/M Won't Boot Properly The 12H6 PAL IC (HE 444-128) at U186 on the motherboard has frequently caused the

H/Z-100 Service Bulletins156163" indicates an HE 150-156 Winchester and HE 150-163 floppy are installed. A cross-reference of drive numbers is pr

H/Z-100 Service Bulletinspermit machine insertion of the part. FSB-Z100-057: Z-100/RS-232 Modification A situation may occasionally be experienced w

H/Z-100 Service BulletinsFSB-Z100-004: Changes to Service Data Manual Please make the following changes in your Z-100 Service Data Manual:- On page 3-

H/Z-100 Service BulletinsIf "Device Controller Error" is presented or there is no prompt, check DS1 (HE 60-621) for incorrect markings. A nu

H/Z-100 Service BulletinsFSB-MON-004: ZVM-135 Color Monitor w/Dark Vertical Band If a dark vertical band, approx 1/2" wide, develops on the CRT&a

H/Z-100 Service Bulletins- Schematic VB1 Locate VIDRAMDRY at P305-62 and remove the overbar. This line asserts on logic one. Refer to the table shown

H/Z-100 Service BulletinsFSB-Z100-006: Test Operates Erratically When the H/Z-100 is disassembled and reconnected with extended length cables to be us

H/Z-100 Service Bulletins10 'CROSSHATCH20 CLS30 FOR I=0 TO 640 STEP 3040 LINE (I,0)-(I,240),750 NEXT I60 FOR I=0 TO 250 STEP 1570 LINE (0,I)-(630

H/Z-100 Service BulletinsFSB-Z100-014: Unit Hangs Up After Lengthy Operation Check the programmable interrupt controllers U208 and U209 (HE 443-1012).

H/Z-100 Service BulletinsIn some of these revisions, the firmware will either initialize a circuit that wasn't previously initialized or initiali

H/Z-100 Service Bulletinspositive and negative leads of the 10 uF capacitor are positioned to the left of the component side of the board (with the 10

H/Z-100 Service Bulletins-- Locate U22-38. Change "ORG" to DRQ." -- To make the schematic agree with the printed circuit board, change